Springs - Constant Force

Springs -> Constant Force

There are 4 products in the sub-categories of Springs - Constant Force. Browse the Springs - Constant Force products table.

Category Details

A selection of Constant Force Springs. 301 Stainless Steel

  • An expanded range may be available on special order. Please enquire.
  • Mounting hole specifications will be supplied on request. These springs are usually mounted on a drum and the free end attached to a loading force like a counterbalance.
  • Free ID may vary to meet load specification.
  • Load capacity can be increased by using multiple strips in tandem, back to back or laminated.
  • Be sure to leave at least 40mm coiled on the drum at full extension. The spring ID will wrap tightly on the drum so that most applications require no fastening to the drum.

Miniature Bearings Australia - MBA Minibearings

Additional resources:


A more concise listing may be found in the Springs - Constant Force category on the Small Parts & Bearings online store.
Load Capacity Band Length Thickness (t) Band Width (W) Free ID (Ref. Only) Drum Diameter Indicative
Image
Load Capacity
1.0
Newtons
+/- 10%
Band Length
406.4
mm

(Equiv. 16 in.)
Thickness (t)
0.102
mm

(Equiv. 0.004 in.)
Band Width (W)
6.35
mm
Free ID (Ref. Only)
13.10
mm
Drum Diameter
16.0
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 24130.0 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0010-0406-064-S1 (10 Pcs)
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Carbon Spring Steel Music Wire
1 pack (10 pcs) Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$20.00 AUD
$38.00 AUD $20.00 AUD
Per 10
Quantity Required

1 pack (10 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Load Capacity Band Length Thickness (t) Band Width (W) Indicative
Image
Load Capacity
1.0
Newtons
+/- 10%
Band Length
406.4
mm

(Equiv. 16 in.)
Thickness (t)
0.102
mm

(Equiv. 0.004 in.)
Band Width (W)
6.35
mm
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Free ID (Ref. Only): 13.10 mm    Drum Diameter: 16.0    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 24130.0 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0010-0406-064-S1 (10 Pcs)
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Carbon Spring Steel Music Wire
1 pack (10 pcs) Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$20.00 AUD
$38.00 AUD $20.00 AUD
Per 10
Quantity Required

1 pack (10 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Load Capacity
1.4
Newtons
+/- 10%
Band Length
381.0
mm

(Equiv. 15 in.)
Thickness (t)
0.102
mm

(Equiv. 0.004 in.)
Band Width (W)
6.35
mm
Free ID (Ref. Only)
11.11
mm
Drum Diameter
13.5
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 20.3 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0014-0381-064-S1
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Carbon Spring Steel Music Wire
2641 Available Now | Item Discontinued - Up to 2641 may be ordered online. No backorders. Please contact us if you need a larger quantity
$3.00 AUD
$5.70 AUD $3.00 AUD
Each
Quantity Required

2641 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Load Capacity
1.4
Newtons
+/- 10%
Band Length
381.0
mm

(Equiv. 15 in.)
Thickness (t)
0.102
mm

(Equiv. 0.004 in.)
Band Width (W)
6.35
mm
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Free ID (Ref. Only): 11.11 mm    Drum Diameter: 13.5    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 20.3 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0014-0381-064-S1
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Carbon Spring Steel Music Wire
2641 Available Now | Item Discontinued - Up to 2641 may be ordered online. No backorders. Please contact us if you need a larger quantity
$3.00 AUD
$5.70 AUD $3.00 AUD
Each
Quantity Required

2641 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Load Capacity
8.8
Newtons
+/- 10%
Band Length
812.8
mm

(Equiv. 32 in.)
Thickness (t)
0.254
mm

(Equiv. 0.01 in.)
Band Width (W)
15.88
mm
Free ID (Ref. Only)
28.18
mm
Drum Diameter
33.8
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 50.8 mm    Max. Working Deflection (f2): 609.6   
Part Number: CFS-0088-0813-159-S1-TW
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Carbon Spring Steel Music Wire
450 Available Now | Further orders can be expected around Thu, Nov 06, 2025
$14.05 AUD
$14.05 AUD
Each
Quantity Required

450 Available Now. Backorder if more than 450.
Load Capacity
8.8
Newtons
+/- 10%
Band Length
812.8
mm

(Equiv. 32 in.)
Thickness (t)
0.254
mm

(Equiv. 0.01 in.)
Band Width (W)
15.88
mm
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Free ID (Ref. Only): 28.18 mm    Drum Diameter: 33.8    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 50.8 mm    Max. Working Deflection (f2): 609.6   
Part Number: CFS-0088-0813-159-S1-TW
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Carbon Spring Steel Music Wire
450 Available Now | Further orders can be expected around Thu, Nov 06, 2025
$14.05 AUD
$14.05 AUD
Each
Quantity Required

450 Available Now. Backorder if more than 450.
Load Capacity
25.9
Newtons
+/- 10%
Band Length
1371.6
mm

(Equiv. 54 in.)
Thickness (t)
0.508
mm

(Equiv. 0.02 in.)
Band Width (W)
31.75
mm
Free ID (Ref. Only)
66.68
mm
Drum Diameter
80.3
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 120.7 mm    Max. Working Deflection (f2): 914.4   
Part Number: CFS-0259-1372-318-S1-TW
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Carbon Spring Steel Music Wire
44 Available Now | Further orders can be expected around Thu, Nov 06, 2025
$40.50 AUD
$40.50 AUD
Each
Quantity Required

44 Available Now. Backorder if more than 44.
Load Capacity
25.9
Newtons
+/- 10%
Band Length
1371.6
mm

(Equiv. 54 in.)
Thickness (t)
0.508
mm

(Equiv. 0.02 in.)
Band Width (W)
31.75
mm
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
Material: Carbon Spring Steel Music Wire    Free ID (Ref. Only): 66.68 mm    Drum Diameter: 80.3    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 120.7 mm    Max. Working Deflection (f2): 914.4   
Part Number: CFS-0259-1372-318-S1-TW
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Carbon Spring Steel Music Wire
44 Available Now | Further orders can be expected around Thu, Nov 06, 2025
$40.50 AUD
$40.50 AUD
Each
Quantity Required

44 Available Now. Backorder if more than 44.