TB Series Construction Tooling Balls
SKU
TB Series Construction Tooling Balls
Find hole centers easily with this reference artifact
The TB Series construction balls are used for applications requiring a 1/2" (English version) or 12 mm (metric version) reference ball located a known distance from a surface, or on the centerline of a hole. The shank diameter is held to very close tolerances for a precision slip fit into our BXT extension bar or customer-provided tools. Various offset dimensions and shank diameters are available. Choose from the available sizes shown in the table below.
| Model | Ball Diameter | Offset "A" | Shank Diameter "B" | Length "L" | Internal Thread* |
| TB-.3125-.25 | 0.500" | 0.3125" | 0.250" | 0.63" | 6-32 UNC |
| TB-.5-.25 | 0.500" | 0.500" | 0.250" | 0.94" | 6-32 UNC |
| TB-.5-.3125 | 0.500" | 0.500" | 0.3125" | 0.94" | 6-32 UNC |
| TB-.5-.375 | 0.500" | 0.500" | 0.375" | 1.50" | - |
| TB-12MM-6MM | 12 mm | 12 mm | 6 mm | 22.10 mm | - |
*Not all Items have an internally threaded shank
Note: This product is not recommended for use as a target with scanner systems.
May Be Used With
12410-G2 Concave tip for Invar system (TBs having 0.5" diameter ball only)
BXT Series extension bars (be sure to match BXT bar to your TB, some TBs do not fit some BXTs)
TBA Series (be sure to match TBA adapters to your TB, some TBs do not work with some TBAs)
| Ball Diameter Tolerance | +0.0000", -0.0004" (+0.000 mm, -0.010 mm) |
|---|---|
| Concentricity between ball and shank | 0.0002" TIR (0.005 mm TIR) |
| Hardness | HRC 54-56 |
| Shank Diameter Tolerance | +0.0000", -0.0004" (+0.000 mm, -0.010 mm) |
| Offset Dimension Tolerance | ±0.0002" (±0.005 mm) |
