Collection: Bearings - Single Row Ball - Unflanged - Precision

Bearings -> Single Row Ball -> Unflanged -> Precision
ID (d) OD (D) Width (B) Inner Ring Width (Bn) Flange Diameter (DF) Flange Width (BF) Indicative
Image
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-ZZ-MC3
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
129 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $6.86 AUD
Regular price Sale price $6.86 AUD
Each
Quantity Required

129 Available Now. Backorder if more than 129.
ID (d) OD (D) Width (B) Inner Ring Width (Bn) Indicative
Image
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-ZZ-MC3
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
129 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $6.86 AUD
Regular price Sale price $6.86 AUD
Each
Quantity Required

129 Available Now. Backorder if more than 129.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: MR84A-ZZ-MC3-JP6 (50 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $268.86 AUD
Regular price $322.64 AUD Sale price $268.86 AUD
Per 50
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: MR84A-ZZ-MC3-JP6 (50 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $268.86 AUD
Regular price $322.64 AUD Sale price $268.86 AUD
Per 50
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-MC3-JP6-L23 (100 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Tue, Jan 27, 2026
Regular price $419.41 AUD
Regular price $503.29 AUD Sale price $419.41 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-MC3-JP6-L23 (100 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Tue, Jan 27, 2026
Regular price $419.41 AUD
Regular price $503.29 AUD Sale price $419.41 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: MR84A-ZZ-MC3
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
253 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $4.32 AUD
Regular price Sale price $4.32 AUD
Each
Quantity Required

253 Available Now. Backorder if more than 253.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: MR84A-ZZ-MC3
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
253 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $4.32 AUD
Regular price Sale price $4.32 AUD
Each
Quantity Required

253 Available Now. Backorder if more than 253.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100 - High Speed Polyamide Cage
Material: Chrome Steel SAE 52100 - High Speed Polyamide Cage    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - High Speed Cage
Part Number: MR84A-ZZ-T9H-MC3
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 - High Speed Polyamide Cage Bearing
1 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $4.05 AUD
Regular price Sale price $4.05 AUD
Each
Quantity Required

1 Available Now. Backorder if more than 1.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100 - High Speed Polyamide Cage
Material: Chrome Steel SAE 52100 - High Speed Polyamide Cage    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - High Speed Cage
Part Number: MR84A-ZZ-T9H-MC3
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 - High Speed Polyamide Cage Bearing
1 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $4.05 AUD
Regular price Sale price $4.05 AUD
Each
Quantity Required

1 Available Now. Backorder if more than 1.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100 - Ceramic Si3N4 Balls
Material: Chrome Steel SAE 52100 - Ceramic Si3N4 Balls    Precision Grade: Abec 1    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Ceramic Hybrid
Part Number: MR84A-CSN-ZZS-ACO-ECO (200 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 - Ceramic Si3N4 Balls Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $840.68 AUD
Regular price $1,008.82 AUD Sale price $840.68 AUD
Per 200
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100 - Ceramic Si3N4 Balls
Material: Chrome Steel SAE 52100 - Ceramic Si3N4 Balls    Precision Grade: Abec 1    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Ceramic Hybrid
Part Number: MR84A-CSN-ZZS-ACO-ECO (200 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 - Ceramic Si3N4 Balls Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $840.68 AUD
Regular price $1,008.82 AUD Sale price $840.68 AUD
Per 200
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-MC3-JP6-AF12
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | More stock due: 50 around Thu, Sep 18, 2025 | Further orders can be expected around Tue, Nov 18, 2025
Regular price $8.86 AUD
Regular price Sale price $8.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-MC3-JP6-AF12
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | More stock due: 50 around Thu, Sep 18, 2025 | Further orders can be expected around Tue, Nov 18, 2025
Regular price $8.86 AUD
Regular price Sale price $8.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-ZZ-MC3-JP6 (100 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $838.77 AUD
Regular price Sale price $838.77 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: SMR84A-ZZ-MC3-JP6 (100 Pcs)
Single Row Ball Bearings - 4x8x3 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $838.77 AUD
Regular price Sale price $838.77 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
5.000
mm

(Equiv. 0.197 in.)
Single Row Ball Bearings - 4x8x5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: MR84D-ZZS-ECO
Single Row Ball Bearings - 4x8x5 mm Unflanged - Chrome Steel SAE 52100 Bearing
16 Available Now | Item Discontinued - Up to 16 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Each
Quantity Required

16 Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
5.000
mm

(Equiv. 0.197 in.)
Single Row Ball Bearings - 4x8x5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: MR84D-ZZS-ECO
Single Row Ball Bearings - 4x8x5 mm Unflanged - Chrome Steel SAE 52100 Bearing
16 Available Now | Item Discontinued - Up to 16 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Each
Quantity Required

16 Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684-ZZS-ECO
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
19 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $2.14 AUD
Regular price Sale price $2.14 AUD
Each
Quantity Required

19 Available Now. Backorder if more than 19.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684-ZZS-ECO
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
19 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $2.14 AUD
Regular price Sale price $2.14 AUD
Each
Quantity Required

19 Available Now. Backorder if more than 19.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684-MC3-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
1 Available Now | More stock due: 100 around Mon, Oct 06, 2025 | Further orders can be expected around Fri, Oct 03, 2025
Regular price $4.41 AUD
Regular price Sale price $4.41 AUD
Each
Quantity Required

1 Available Now. Backorder if more than 1.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684-MC3-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
1 Available Now | More stock due: 100 around Mon, Oct 06, 2025 | Further orders can be expected around Fri, Oct 03, 2025
Regular price $4.41 AUD
Regular price Sale price $4.41 AUD
Each
Quantity Required

1 Available Now. Backorder if more than 1.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC2-AF12 (100 Pcs)
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $352.14 AUD
Regular price $422.56 AUD Sale price $352.14 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC2-AF12 (100 Pcs)
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $352.14 AUD
Regular price $422.56 AUD Sale price $352.14 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.120
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC3-JP6-AF12 (100 Pcs)
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $724.59 AUD
Regular price Sale price $724.59 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.120
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC3-JP6-AF12 (100 Pcs)
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $724.59 AUD
Regular price Sale price $724.59 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC3-R-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
469 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $8.95 AUD
Regular price Sale price $8.95 AUD
Each
Quantity Required

469 Available Now. Backorder if more than 469.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC3-R-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
469 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $8.95 AUD
Regular price Sale price $8.95 AUD
Each
Quantity Required

469 Available Now. Backorder if more than 469.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC3-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
13 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $3.68 AUD
Regular price Sale price $3.68 AUD
Each
Quantity Required

13 Available Now. Backorder if more than 13.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684-MC3-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
13 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $3.68 AUD
Regular price Sale price $3.68 AUD
Each
Quantity Required

13 Available Now. Backorder if more than 13.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684D-ZZS-ECO
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
Contact Us | Item Discontinued - Please contact us if you need a large quantity
Quantity Required

Contact Us. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684D-ZZS-ECO
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
Contact Us | Item Discontinued - Please contact us if you need a large quantity
Quantity Required

Contact Us. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
301 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $5.86 AUD
Regular price Sale price $5.86 AUD
Each
Quantity Required

301 Available Now. Backorder if more than 301.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
301 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $5.86 AUD
Regular price Sale price $5.86 AUD
Each
Quantity Required

301 Available Now. Backorder if more than 301.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
97 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $5.32 AUD
Regular price Sale price $5.32 AUD
Each
Quantity Required

97 Available Now. Backorder if more than 97.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - 440C Stainless
Part Number: S684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
97 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $5.32 AUD
Regular price Sale price $5.32 AUD
Each
Quantity Required

97 Available Now. Backorder if more than 97.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-2RS-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Oct 06, 2025
Regular price $4.50 AUD
Regular price Sale price $4.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-2RS-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Oct 06, 2025
Regular price $4.50 AUD
Regular price Sale price $4.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: 2RS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-2RS-MC3
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
73 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $6.41 AUD
Regular price Sale price $6.41 AUD
Each
Quantity Required

73 Available Now. Backorder if more than 73.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: 2RS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-2RS-MC3
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
73 Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $6.41 AUD
Regular price Sale price $6.41 AUD
Each
Quantity Required

73 Available Now. Backorder if more than 73.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-ZZ-MC3 (2 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
299 units (598 pcs) Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $6.95 AUD
Regular price Sale price $6.95 AUD
Per 2
Quantity Required

299 units (598 pcs) Available Now. Backorder if more than 299.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-ZZ-MC3 (2 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
299 units (598 pcs) Available Now | Further orders can be expected around Fri, Oct 03, 2025
Regular price $6.95 AUD
Regular price Sale price $6.95 AUD
Per 2
Quantity Required

299 units (598 pcs) Available Now. Backorder if more than 299.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-ZZS-ECO (5 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $6.45 AUD Sale price $3.49 AUD
Per 5
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-ZZS-ECO (5 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $6.45 AUD Sale price $3.49 AUD
Per 5
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RB    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-2RB-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
750 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $2.23 AUD
Regular price Sale price $2.23 AUD
Each
Quantity Required

750 Available Now. Backorder if more than 750.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RB    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-2RB-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
750 Available Now | Further orders can be expected around Sat, Sep 27, 2025
Regular price $2.23 AUD
Regular price Sale price $2.23 AUD
Each
Quantity Required

750 Available Now. Backorder if more than 750.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-ZZ-MC3-JP6 (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
Per 100
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel
Part Number: 684A-ZZ-MC3-JP6 (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Fri, Oct 03, 2025
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
Per 100
Quantity Required

Backorder: Out of Stock.