Balls - Tooling - Two Piece - Construction

Balls -> Tooling -> Two Piece -> Construction

There are 4 products in the sub-categories of Balls - Tooling - Two Piece - Construction. Browse the Balls - Tooling - Two Piece - Construction products table.

Category Details

A selection of Construction Two Piece Tooling Balls. 1144 steel heat treated to 53-57 RC

  • High quality tooling balls provide a precise reference point for critical machining operations.
  • Tooling balls, also known as tooling spheres or precision spheres, are precision components used in fixture design, tooling setup, and alignment applications.
  • Tooling balls are made of hardened steel or other materials with high wear resistance and precision-ground surfaces.
  • Precise shoulder base to ball centre line dimension within +/- 0.00508mm.
  • Ball and shank are concentric within 5 microns (0.0002 in.) TIR.
  • Weld between ball and shank is designed so the ball will fall off if subject to unusually heavy lateral force, preventing set up and inspection errors that may occur because of a bent shaft.
  • Construction balls can be pulled into a hole or bushing from below without applying pressure on the ball by using a cap screw in the internally tapped shank.

Miniature Bearings Australia - MBA Minibearings

Additional resources:


A more concise listing may be found in the Balls - Tooling - Two Piece - Construction category on the Small Parts & Bearings online store.
Diameter (A) Shank Diameter (B) Base to Centre (C) Shoulder to Centre (D) Shoulder Diameter (E) Base Type Indicative
Image
Tooling Balls - 12.7x6.35x23.876 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
6.350
mm
+/- 0.0051
(Equiv. 0.25 in.)
Base to Centre (C)
23.876
mm
Shoulder to Centre (D)
12.700
mm
Base Type
6-32 UNC x 7.93
Tooling Balls - 12.7x6.35x23.876 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel   
Part Number: BLTO-01270-CS-C2-C (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$95.05 AUD
$114.05 AUD $95.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Diameter (A) Shank Diameter (B) Base to Centre (C) Shoulder to Centre (D) Indicative
Image
Tooling Balls - 12.7x6.35x23.876 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
6.350
mm
+/- 0.0051
(Equiv. 0.25 in.)
Base to Centre (C)
23.876
mm
Shoulder to Centre (D)
12.700
mm
Tooling Balls - 12.7x6.35x23.876 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel    Base Type: 6-32 UNC x 7.93   
Part Number: BLTO-01270-CS-C2-C (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$95.05 AUD
$114.05 AUD $95.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Tooling Balls - 12.7x6.35x15.875 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
6.350
mm
+/- 0.0051
(Equiv. 0.25 in.)
Base to Centre (C)
15.875
mm
Shoulder to Centre (D)
7.938
mm
Base Type
6-32 UNC x 6.35
Tooling Balls - 12.7x6.35x15.875 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel   
Part Number: BLTO-01270-CS-C2-A (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$145.68 AUD
$145.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Tooling Balls - 12.7x6.35x15.875 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
6.350
mm
+/- 0.0051
(Equiv. 0.25 in.)
Base to Centre (C)
15.875
mm
Shoulder to Centre (D)
7.938
mm
Tooling Balls - 12.7x6.35x15.875 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel    Base Type: 6-32 UNC x 6.35   
Part Number: BLTO-01270-CS-C2-A (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$145.68 AUD
$145.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Tooling Balls - 12.7x6.35x22.225 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
6.350
mm
+/- 0.0051
(Equiv. 0.25 in.)
Base to Centre (C)
22.225
mm
Shoulder to Centre (D)
12.700
mm
Base Type
6-32 UNC x 6.35
Tooling Balls - 12.7x6.35x22.225 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel   
Part Number: BLTO-01270-CS-C2-B (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$132.14 AUD
$158.56 AUD $132.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Tooling Balls - 12.7x6.35x22.225 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
6.350
mm
+/- 0.0051
(Equiv. 0.25 in.)
Base to Centre (C)
22.225
mm
Shoulder to Centre (D)
12.700
mm
Tooling Balls - 12.7x6.35x22.225 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel    Base Type: 6-32 UNC x 6.35   
Part Number: BLTO-01270-CS-C2-B (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$132.14 AUD
$158.56 AUD $132.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Tooling Balls - 12.7x7.938x23.876 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
7.938
mm
+/- 0.0051
(Equiv. 0.313 in.)
Base to Centre (C)
23.876
mm
Shoulder to Centre (D)
12.700
mm
Base Type
6-32 UNC x 7.93
Tooling Balls - 12.7x7.938x23.876 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel   
Part Number: BLTO-01270-CS-C2-D (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$100.05 AUD
$120.05 AUD $100.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Tooling Balls - 12.7x7.938x23.876 mm Two Piece - Carbon Steel Ball
Diameter (A)
12.700
mm
+/- 0.0051
(Equiv. 0.5 in.)
Shank Diameter (B)
7.938
mm
+/- 0.0051
(Equiv. 0.313 in.)
Base to Centre (C)
23.876
mm
Shoulder to Centre (D)
12.700
mm
Tooling Balls - 12.7x7.938x23.876 mm Two Piece - Carbon Steel Ball
Material: Carbon Steel    Base Type: 6-32 UNC x 7.93   
Part Number: BLTO-01270-CS-C2-D (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
$100.05 AUD
$120.05 AUD $100.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.