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TB Series Construction Tooling Ball
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Find hole centers easily with this reference
artifact |
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The TB Series construction balls are used for applications
requiring a 1/2" (English version) or 12mm (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.
Note: This product is not recommended for use as a
target with scanner systems. Instead, we offer our TBHR Series of highly reflective
tooling balls.
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| Part No. |
Ball Dia. |
Offset
"A" |
Shank Dia. "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" |
n.a. |
| TB-12MM-6MM |
12mm |
12mm |
6mm |
22.10mm |
n.a. |
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*Not all items have
an internally threaded shank |
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Concentricity between ball and shank: 0.0002" TIR
(0.005mm TIR)
Tolerance, shank diameter: +0.0000", −0.0004"
(+0.000mm, −0.010mm)
Tolerance, offset dimension: ±0.0002" (±0.005mm) |
Ball diameter tolerance: +0.0000", −0.0004"
(+0.000mm, −0.010mm)
Material: 1144 steel
Hardness: HRC 54-56 |
- 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)
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- TBA Series (be sure to match TBA
adapters to your TB, some TBs do not work with some TBAs)
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