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R8 Collets
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Collet Size | ID Tolerance | Body Dia. | Overall Lg. | Internal Thread Size | Each | |||
|---|---|---|---|---|---|---|---|---|
Hardened Steel—0.0002" Total Indicated Runout (TIR) Accuracy | ||||||||
| 1/16" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A61 | 000000 | ||
| 3/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A62 | 00000 | ||
| 1/8" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A11 | 00000 | ||
| 5/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A12 | 00000 | ||
| 3/16" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A13 | 00000 | ||
| 7/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A14 | 00000 | ||
| 1/4" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A15 | 00000 | ||
| 9/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A16 | 00000 | ||
| 5/16" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A17 | 00000 | ||
| 11/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A18 | 00000 | ||
| 3/8" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A19 | 00000 | ||
| 13/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A21 | 00000 | ||
| 7/16" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A22 | 00000 | ||
| 15/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A23 | 00000 | ||
| 1/2" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A24 | 00000 | ||
| 17/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A25 | 00000 | ||
| 9/16" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A26 | 00000 | ||
| 19/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A63 | 00000 | ||
| 5/8" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A28 | 00000 | ||
| 21/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A29 | 00000 | ||
| 11/16" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A31 | 00000 | ||
| 23/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A32 | 00000 | ||
| 3/4" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A33 | 00000 | ||
| 25/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A34 | 00000 | ||
| 13/16" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A35 | 00000 | ||
| 27/32" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A36 | 00000 | ||
| 7/8" | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A37 | 00000 | ||
| 1" | -0.004" to 0" | 0.95" | 5.1" | 7/16"-20 | 3257A64 | 00000 | ||
| 3 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A41 | 00000 | ||
| 4 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A42 | 00000 | ||
| 5 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A43 | 00000 | ||
| 6 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A44 | 00000 | ||
| 7 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A45 | 00000 | ||
| 8 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A46 | 00000 | ||
| 9 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A47 | 00000 | ||
| 10 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A48 | 00000 | ||
| 11 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A49 | 00000 | ||
| 12 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A51 | 00000 | ||
| 13 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A52 | 00000 | ||
| 14 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A53 | 00000 | ||
| 15 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A54 | 00000 | ||
| 16 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A55 | 00000 | ||
| 17 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A56 | 00000 | ||
| 18 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A57 | 00000 | ||
| 19 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A58 | 00000 | ||
| 20 mm | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | 3257A59 | 00000 | ||
Hardened Steel—0.0008" Total Indicated Runout (TIR) Accuracy | ||||||||
| 3/32" | -0.004" to 0" | 0.95" | 4.134" | 7/16"-20 | 3257A335 | 00000 | ||
| 1/8" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A303 | 00000 | ||
| 5/32" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A304 | 00000 | ||
| 3/16" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A305 | 00000 | ||
| 7/32" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A306 | 00000 | ||
| 1/4" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A307 | 00000 | ||
| 9/32" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A308 | 00000 | ||
| 5/16" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A309 | 00000 | ||
| 11/32" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A311 | 00000 | ||
| 3/8" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A312 | 00000 | ||
| 13/32" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A313 | 00000 | ||
| 7/16" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A314 | 00000 | ||
| 15/32" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A315 | 00000 | ||
| 1/2" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A316 | 00000 | ||
| 9/16" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A317 | 00000 | ||
| 5/8" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A318 | 00000 | ||
| 3/4" | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A319 | 00000 | ||
| 7/8" | -0.004" to 0" | 0.95" | 4.134" | 7/16"-20 | 3257A336 | 00000 | ||
| 2 mm | -0.004" to 0" | 0.95" | 4.134" | 7/16"-20 | 3257A337 | 00000 | ||
| 3 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A321 | 00000 | ||
| 4 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A322 | 00000 | ||
| 5 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A323 | 00000 | ||
| 6 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A324 | 00000 | ||
| 7 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A325 | 00000 | ||
| 8 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A326 | 00000 | ||
| 9 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A327 | 00000 | ||
| 10 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A328 | 00000 | ||
| 12 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A329 | 00000 | ||
| 14 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A331 | 00000 | ||
| 16 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A332 | 00000 | ||
| 18 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A333 | 00000 | ||
| 20 mm | 0" to 0.001" | 0.95" | 4.134" | 7/16"-20 | 3257A334 | 00000 | ||
R8 Collet Sets
No. of Pieces | Collet Sizes Included | ID Tolerance | Body Dia. | Overall Lg. | Internal Thread Size | Container Type | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|
Hardened Steel—0.0002" Total Indicated Runout (TIR) Accuracy | ||||||||||
| 8 | 1/8"-1" (increments of 1/8") | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | — | 3257A65 | 0000000 | ||
| 13 | 1/8"-7/8" (increments of 1/16") | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | — | 3257A66 | 000000 | ||
| 18 | 3 mm-20 mm (increments of 1 mm) | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | — | 3257A69 | 000000 | ||
| 27 | 1/16"-7/8" (increments of 1/32") | -0.004" to 0" | 0.95" | 4.089" | 7/16"-20 | — | 3257A68 | 000000 | ||
Hardened Steel—0.0008" Total Indicated Runout (TIR) Accuracy | ||||||||||
| 20 | 1/8"-3/4" (increments of 1/32", excludes 17/32") | 0" to 0.001" | 0.95" | 4.089" | 7/16"-20 | Plastic Case | 3257A71 | 000000 | ||
R8 Taper End Mill Holders
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
For End Mill Shank Dia. | For No. of End Mill Milling Ends | Internal Thread Size | Dia. | Lg. | Material | Fabrication | Includes | Each | ||
| 1/8" | 1 | 7/16"-20 | 3/4" | 1 3/8" | Steel | Heat Treated | Set Screws | 8781A33 | 000000 | |
| 3/16" | 1, 2 | 7/16"-20 | 3/4" | 1 3/8" | Steel | Heat Treated | Set Screws | 8781A21 | 00000 | |
| 1/4" | 1, 2 | 7/16"-20 | 51/64" | 1 3/8" | Steel | Heat Treated | Set Screws | 8781A32 | 00000 | |
| 5/16" | 1 | 7/16"-20 | 7/8" | 1 3/4" | Steel | Heat Treated | Set Screws | 8781A34 | 00000 | |
| 3/8" | 1, 2 | 7/16"-20 | 1" | 1 3/8" | Steel | Heat Treated | Set Screws | 8781A22 | 00000 | |
| 1/2" | 1 | 7/16"-20 | 1 3/8" | 1 3/8" | Steel | Heat Treated | Set Screws | 8781A23 | 00000 | |
| 5/8" | 1 | 7/16"-20 | 1 21/32" | 1 1/2" | Steel | Heat Treated | Set Screws | 8781A24 | 00000 | |
| 3/4" | 1 | 7/16"-20 | 1 57/64" | 2 3/8" | Steel | Heat Treated | Set Screws | 8781A25 | 000000 | |
| 7/8" | 1 | 7/16"-20 | 2" | 2 3/4" | Steel | Heat Treated | Set Screws | 8781A26 | 000000 | |
| 1" | 1 | 7/16"-20 | 2 3/8" | 3 1/4" | Steel | Heat Treated | Set Screws | 8781A27 | 000000 | |
| 1 1/4" | 1 | 7/16"-20 | 2 1/2" | 3 1/4" | Steel | Heat Treated | Set Screws | 8781A28 | 000000 | |
| 1 1/2" | 1 | 7/16"-20 | 3" | 3 3/4" | Steel | Heat Treated | Set Screws | 8781A29 | 000000 | |
Quick-Change Milling Machine Tool Holders
R8 Body
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R8 Taper Shank Thread | |||||||
|---|---|---|---|---|---|---|---|
Total Indicated Runout (TIR) Accuracy | Gender | Size | Spindle Overhang | Material | Each | ||
| 0.0005" | Female | 7/16"-20 | 1 1/8" | Steel | 2012N11 | 000000000 | |
Machine-Your-Own R8 Collets
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Max. Bore Dia. | Body Dia. | Overall Lg. | Face Pilot Hole Dia. | Internal Thread Size | Material | Each | ||
|---|---|---|---|---|---|---|---|---|
| 3/4" | 0.95" | 4.089" | 1/16" | 7/16"-20 | Steel | 9634N11 | 000000 |
R8 Collet Stands
R8 Taper to Morse Taper Shank Adapters
R8 Taper Collet Chucks
Milling Machine Collet Chucks | Wrenches | Replacement Nuts | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Collet Type | For Bit Shank Size | Projection | Total Indicated Runout (TIR) Accuracy | Material | Collet Nut Type | Features | Each | Each | Each | |||||
| ER-16 | 0.019" to 0.406" | 1.25" | 0.0001" | Hardened Alloy Steel | Hex Nut | Collet Stop Screw | 9523N13 | 0000000 | 3215A441 | 000000 | 9502N33 | 000000 | ||
| ER-20 | 0.039" to 0.551" | 2" | 0.0001" | Hardened Alloy Steel | Hex Nut | Collet Stop Screw | 9523N14 | 000000 | 1721N15 | 00000 | 9502N34 | 00000 | ||
| ER-25 | 0.039" to 0.629" | 2.5" | 0.0001" | Hardened Alloy Steel | Slotted Nut | Collet Stop Screw | 9523N15 | 000000 | 5699N128 | 00000 | 9502N35 | 00000 | ||
| ER-32 | 0.078" to 0.787" | 2.25" | 0.0002" | Hardened Alloy Steel | Slotted Nut | — | 9523N11 | 000000 | 3321A32 | 00000 | 9502N15 | 00000 | ||
| ER-40 | 0.118" to 1.024" | 2.375" | 0.0002" | Hardened Alloy Steel | Slotted Nut | — | 9523N12 | 000000 | 32605A95 | 00000 | 9502N16 | 00000 | ||
| TG-100 | 0.0469" to 1" | 3.25" | 0.0001" | Hardened Alloy Steel | Slotted Nut | Collet Stop Screw | 9523N16 | 000000 | 32605A95 | 00000 | 9531N12 | 00000 | ||
Drill Chucks with R8 Taper Integral Arbor
For Bit Shank Size | Max. No-Load Rotational Speed, rpm | Total Indicated Runout (TIR) Accuracy | Jaw Material | Body Material | Projection | Max. Body Dia. | For Tool Drive Direction | Mfr. Model No. | Features | Includes | Certificate Type | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Keyless Chuck | |||||||||||||||
McMaster-Carr Approved | |||||||||||||||
| 1/32" to 1/2" 1 mm to 13 mm | 10,000 | 0.0016" | Hardened Steel | Hardened Steel | 3 1/4" | 1.89" | Clockwise | — | Wrench Flats | Spanner Wrench | Accuracy Certificate | 9790N11 | 0000000 | ||
| 1/8" to 5/8" 3 mm to 16 mm | 8,000 | 0.0016" | Hardened Steel | Hardened Steel | 3 7/16" | 2.13" | Clockwise | — | Wrench Flats | Spanner Wrench | Accuracy Certificate | 9790N12 | 000000 | ||
Albrecht | |||||||||||||||
| 1/32" to 1/2" 1 mm to 13 mm | 7,000 | 0.0019" | Hardened Steel | Hardened Steel | 3 5/16" | 2" | Clockwise | CP130-R8 | — | — | — | 30075A48 | 000000 | ||
| 1/8" to 5/8" 3 mm to 16 mm | 4,000 | 0.002" | Hardened Steel | Hardened Steel | 3 7/16" | 2.25" | Clockwise | CP160-R8 | — | — | — | 30075A58 | 000000 | ||
Keyed Chuck | |||||||||||||||
McMaster-Carr Approved | |||||||||||||||
| 1/32" to 1/2" 1 mm to 13 mm | 8,000 | 0.0008" | Hardened Steel | Hardened Steel | 3 3/8" | 2.13" | Clockwise, Counterclockwise | — | — | Key | Accuracy Certificate | 9790N13 | 000000 | ||
| 1/8" to 5/8" 3 mm to 16 mm | 8,000 | 0.0008" | Hardened Steel | Hardened Steel | 3 1/2" | 2.25" | Clockwise, Counterclockwise | — | — | Key | Accuracy Certificate | 9790N14 | 000000 | ||











































