Collection: Balls - Tooling - Two Piece - Construction

Balls (With Images)

Tooling

Two Piece

Construction
Press Fit
Slip Fit

4 Products in this selection

High quality tooling balls provide a precise reference point for critical machining operations.
Ball and shank are concentric within 5 microns (0.0002 in.) TIR.
1144 steel heat treated to 53-57 RC
Precise shoulder base to ball centre line dimension within +/- 0.00508mm.
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.

Additional resources:
Balls Master Catalogue PDF

A more concise listing may be found on the Smallparts store at Balls - Tooling - Two Piece - Construction. Smallparts promote the most popular MBA products.

Diameter (A)	Shank Diameter (B)	Base to Centre (C)	Shoulder to Centre (D)	Shoulder Diameter (E)	Base Type
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 6.350 mm +/- 0.0051 _{(0.25 in.)}	Base to Centre (C) 15.875 mm _{(0.625 in.)}	Shoulder to Centre (D) 7.938 mm		Base Type 6-32 UNC x 6.35
Material: Carbon Steel
Part Number: BLTO-01270-CS-C2-A Tooling Balls - 12.7x6.35x15.875 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $81.59 AUD Regular price Sale price $81.59 AUD Unit price per Each
Diameter (A)	Shank Diameter (B)	Base to Centre (C)	Shoulder to Centre (D)	Indicative Image
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 6.350 mm +/- 0.0051 _{(0.25 in.)}	Base to Centre (C) 15.875 mm _{(0.625 in.)}	Shoulder to Centre (D) 7.938 mm
Material: Carbon Steel Base Type: 6-32 UNC x 6.35
Part Number: BLTO-01270-CS-C2-A Tooling Balls - 12.7x6.35x15.875 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $81.59 AUD Regular price Sale price $81.59 AUD Unit price per Each View the product page first if you are unsure.
BLTO-01270-CS-C2-A --- Tooling Balls - 12.7x6.35x15.875 mm - Carbon Steel BLTO-01270-CS-C2-A --- Tooling Balls - 12.7x6.35x15.875 mm - Carbon Steel Regular price $81.59 AUD Regular price Sale price $81.59 AUD Unit price per Out of stock! Backorder Now
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 6.350 mm +/- 0.0051 _{(0.25 in.)}	Base to Centre (C) 22.225 mm _{(0.875 in.)}	Shoulder to Centre (D) 12.700 mm		Base Type 6-32 UNC x 6.35
Material: Carbon Steel
Part Number: BLTO-01270-CS-C2-B Tooling Balls - 12.7x6.35x22.225 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $100.50 AUD Regular price Sale price $100.50 AUD Unit price per Each
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 6.350 mm +/- 0.0051 _{(0.25 in.)}	Base to Centre (C) 22.225 mm _{(0.875 in.)}	Shoulder to Centre (D) 12.700 mm
Material: Carbon Steel Base Type: 6-32 UNC x 6.35
Part Number: BLTO-01270-CS-C2-B Tooling Balls - 12.7x6.35x22.225 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $100.50 AUD Regular price Sale price $100.50 AUD Unit price per Each View the product page first if you are unsure.
BLTO-01270-CS-C2-B --- Tooling Balls - 12.7x6.35x22.225 mm - Carbon Steel BLTO-01270-CS-C2-B --- Tooling Balls - 12.7x6.35x22.225 mm - Carbon Steel Regular price $100.50 AUD Regular price Sale price $100.50 AUD Unit price per Out of stock! Backorder Now
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 6.350 mm +/- 0.0051 _{(0.25 in.)}	Base to Centre (C) 23.876 mm _{(0.94 in.)}	Shoulder to Centre (D) 12.700 mm		Base Type 6-32 UNC x 7.93
Material: Carbon Steel
Part Number: BLTO-01270-CS-C2-C Tooling Balls - 12.7x6.35x23.876 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $96.50 AUD Regular price Sale price $96.50 AUD Unit price per Each
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 6.350 mm +/- 0.0051 _{(0.25 in.)}	Base to Centre (C) 23.876 mm _{(0.94 in.)}	Shoulder to Centre (D) 12.700 mm
Material: Carbon Steel Base Type: 6-32 UNC x 7.93
Part Number: BLTO-01270-CS-C2-C Tooling Balls - 12.7x6.35x23.876 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $96.50 AUD Regular price Sale price $96.50 AUD Unit price per Each View the product page first if you are unsure.
BLTO-01270-CS-C2-C --- Tooling Balls - 12.7x6.35x23.876 mm - Carbon Steel BLTO-01270-CS-C2-C --- Tooling Balls - 12.7x6.35x23.876 mm - Carbon Steel Regular price $96.50 AUD Regular price Sale price $96.50 AUD Unit price per Out of stock! Backorder Now
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 7.938 mm +/- 0.0051 _{(0.313 in.)}	Base to Centre (C) 23.876 mm _{(0.94 in.)}	Shoulder to Centre (D) 12.700 mm		Base Type 6-32 UNC x 7.93
Material: Carbon Steel
Part Number: BLTO-01270-CS-C2-D Tooling Balls - 12.7x7.938x23.876 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $85.32 AUD Regular price Sale price $85.32 AUD Unit price per Each
Diameter (A) 12.700 mm +/- 0.0051 _{(0.5 in.)}	Shank Diameter (B) 7.938 mm +/- 0.0051 _{(0.313 in.)}	Base to Centre (C) 23.876 mm _{(0.94 in.)}	Shoulder to Centre (D) 12.700 mm
Material: Carbon Steel Base Type: 6-32 UNC x 7.93
Part Number: BLTO-01270-CS-C2-D Tooling Balls - 12.7x7.938x23.876 mm - Carbon Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 03, 2025 Regular price $85.32 AUD Regular price Sale price $85.32 AUD Unit price per Each View the product page first if you are unsure.
BLTO-01270-CS-C2-D --- Tooling Balls - 12.7x7.938x23.876 mm - Carbon Steel BLTO-01270-CS-C2-D --- Tooling Balls - 12.7x7.938x23.876 mm - Carbon Steel Regular price $85.32 AUD Regular price Sale price $85.32 AUD Unit price per Out of stock! Backorder Now