Shank Type Shank Type |
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Projection Projection |
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Manufacturer Model Number Manufacturer Model Number |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Head-to-Flange Length Head-to-Flange Length |
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Maximum Torque Maximum Torque |
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Minimum Torque Minimum Torque |
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Component Component |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Collet Chucks


Securely hold collets in the spindle of a milling machine.
Use a nut wrench (sold separately) to tighten the chuck nut and secure the tool bit in the collet.
For technical drawings and 3-D models, click on a part number.
Collet Chucks | Nut Wrenches | Replacement Nuts | ||||||
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For Collet Type | Projection | Material | Each | Each | Each | |||
R8 Taper | ||||||||
ER-16 | 1" | Steel | 0000000 | 0000000 | 00000000 | 000000 | 00000000 | 000000 |
ER-20 | 2" | Steel | 0000000 | 000000 | 0000000 | 00000 | 00000000 | 00000 |
CAT 40 Taper | ||||||||
ER-11 | 2 1/2" | Steel | 00000000 | 000000 | 00000000 | 00000 | 00000000 | 00000 |
ER-11 | 6" | Steel | 00000000 | 000000 | 00000000 | 00000 | 00000000 | 00000 |
ER-16 | 2 1/4" | Steel | 00000000 | 000000 | 00000000 | 00000 | 00000000 | 00000 |
ER-16 | 3 1/2" | Steel | 00000000 | 000000 | 00000000 | 00000 | 00000000 | 00000 |
ER-20 | 2 1/2" | Steel | 0000000 | 000000 | 0000000 | 00000 | 00000000 | 00000 |
ER-25 | 2 1/2" | Steel | 00000000 | 000000 | 00000000 | 00000 | 00000000 | 00000 |
ER-25 | 6" | Steel | 00000000 | 000000 | 00000000 | 00000 | 00000000 | 00000 |
ER-32 | 3/4" | Steel | 00000000 | 000000 | 000000 | 00 | 00000000 | 00000 |
ER-32 | 3 1/8" | Steel | 0000000 | 000000 | 0000000 | 00000 | 00000000 | 00000 |
ER-32 | 5" | Steel | 00000000 | 000000 | 0000000 | 00000 | 00000000 | 00000 |
ER-32 | 9" | Steel | 00000000 | 000000 | 0000000 | 00000 | 00000000 | 00000 |
ER-20 Collet Stands

Overall | Mounting Slot | ||||||||
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For Number of Collets | Ht. | Wd. | Dp. | No. of | Wd. | Lg. | Material | Each | |
36 | 1 3/8" | 9 1/8" | 7 7/32" | 2 | 1/4" | 1 1/16" | Steel | 0000000 | 000000 |
ER-16 Collet Stands

Overall | Mounting Slot | ||||||||
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For Number of Collets | Ht. | Wd. | Dp. | No. of | Wd. | Lg. | Material | Each | |
49 | 1 3/8" | 9 1/8" | 7 7/32" | 2 | 1/4" | 1 1/16" | Steel | 0000000 | 000000 |
ER-32 Collet Stands

Overall | Mounting Slot | ||||||||
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For Number of Collets | Ht. | Wd. | Dp. | No. of | Wd. | Lg. | Material | Each | |
40 | 2" | 9 1/8" | 17" | 2 | 1/4" | 1 1/16" | Steel | 0000000 | 000000 |
Retention Knobs




Attach tool holders such as collet chucks and end mill holders to your CNC machine’s spindle. For proper operation, choose a knob that exactly matches your collet type and spindle dimensions. All meet industrial standards for tensile and shear strength. These knobs are also known as pull studs.
Knobs with a coolant hole let coolant flow through to protect your tools and workpiece.
For technical drawings and 3-D models, click on a part number.
Grip Angle | Projection | Head Dia. | Collar Dia. | Head-to-Flange Lg. | Flange Thick. | ID | Torque Range | Material | Features | Manufacturer | Manufacturer Model No. | Specifications Met | Each | |
CAT 40 Taper | ||||||||||||||
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5/8"-11 | ||||||||||||||
15° | 1.03" | 0.748" | 0.512" | 0.793" | 0.28" | 0.276" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | C40-1500 | ISO 7388-3, JIS B 6339 | 0000000 | 000000 |
15° | 1.03" | 0.748" | 0.641" | 0.793" | 0.28" | 0.276" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | O-Ring, Coolant Hole | Lyndex Nikken | C40-1500(R) | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
15° | 1.03" | 0.748" | 0.641" | 0.793" | 0.28" | 0.276" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | O-Ring, Coolant Hole | Lyndex Nikken | C40-1500-MORI | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
30° | 1.266" | 0.591" | 0.512" | 0.99" | 0.24" | __ | 44 ft.-lbs. to 59 ft.-lbs. | Steel | __ | Lyndex Nikken | C40S-6000 | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
45° | 0.64" | 0.74" | 0.512" | 0.433" | 0.12" | 0.276" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | C40-STD | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
45° | 0.64" | 0.74" | 0.641" | 0.44" | 0.12" | 0.157" | Not Rated | Steel | O-Ring, Coolant Hole | Lyndex Nikken | PS-B64-1 | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
45° | 1.266" | 0.591" | 0.512" | 0.99" | 0.24" | __ | 44 ft.-lbs. to 59 ft.-lbs. | Steel | __ | Lyndex Nikken | C40S-4500 | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
45° | 1.266" | 0.591" | 0.512" | 0.99" | 0.24" | 0.177" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | C40S-4500(H) | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
CAT 50 Taper | ||||||||||||||
1"-8 | ||||||||||||||
30° | 1.772" | 0.906" | 1.024" | 1.378" | 0.39" | 0.236" | 85 ft.-lbs. to 110 ft.-lbs. | Steel | O-Ring, Coolant Hole | Lyndex Nikken | PS-B61 | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
45° | 1" | 1.142" | 0.768" | 0.701" | 0.2" | 0.461" | 85 ft.-lbs. to 110 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | C50-STD | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
45° | 1.78" | 0.906" | 0.827" | 1.386" | 0.39" | 0.236" | 85 ft.-lbs. to 110 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | C50-4500(H) | ISO 7388-3, JIS B 6339 | 0000000 | 00000 |
BT 30 Taper | ||||||||||||||
M12 × 1.75 mm | ||||||||||||||
30° | 0.906" | 0.433" | 0.492" | 0.709" | 0.2" | __ | 16 ft.-lbs. to 18 ft.-lbs. | Steel | __ | Lyndex Nikken | B30-6000 | JIS B 6339 | 0000000 | 00000 |
45° | 0.906" | 0.433" | 0.492" | 0.709" | 0.2" | __ | 16 ft.-lbs. to 18 ft.-lbs. | Steel | __ | Lyndex Nikken | B30-4500 | JIS B 6339 | 0000000 | 00000 |
BT 40 Taper | ||||||||||||||
M16 × 2 mm | ||||||||||||||
15° | 1.142" | 0.748" | 0.669" | 0.906" | 0.28" | 0.276" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | O-Ring, Coolant Hole | Lyndex Nikken | B40-1500(R) | JIS B 6339 | 0000000 | 00000 |
15° | 1.142" | 0.748" | 0.669" | 0.906" | 0.28" | 0.276" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | B40-1500 | JIS B 6339 | 0000000 | 00000 |
15° | 1.142" | 0.748" | 0.669" | 0.906" | 0.34" | 0.276" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | O-Ring, Coolant Hole | Lyndex Nikken | B40-1500-MORI | JIS B 6339 | 0000000 | 00000 |
45° | 0.752" | 0.74" | 0.669" | 0.552" | 0.24" | __ | 44 ft.-lbs. to 59 ft.-lbs. | Steel | __ | Lyndex Nikken | B40-FADAL | JIS B 6339 | 0000000 | 00000 |
45° | 1.378" | 0.591" | 0.669" | 1.102" | 0.24" | __ | 44 ft.-lbs. to 59 ft.-lbs. | Steel | __ | Lyndex Nikken | B40-4500 | JIS B 6339 | 0000000 | 00000 |
45° | 1.378" | 0.591" | 0.669" | 1.102" | 0.24" | 0.181" | 44 ft.-lbs. to 59 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | B40-4500(H) | JIS B 6339 | 0000000 | 00000 |
BT 50 Taper | ||||||||||||||
M24 × 3 mm | ||||||||||||||
45° | 1.772" | 0.906" | 0.984" | 1.378" | 0.39" | __ | 85 ft.-lbs. to 110 ft.-lbs. | Steel | __ | Lyndex Nikken | B50-4500 | JIS B 6339 | 0000000 | 00000 |
45° | 1.772" | 0.906" | 0.984" | 1.378" | 0.39" | 0.276" | 85 ft.-lbs. to 110 ft.-lbs. | Steel | Coolant Hole | Lyndex Nikken | B50-4500(H) | JIS B 6339 | 0000000 | 00000 |
Quick-Change Tool Holders for Milling Machines

After installing the R8 body in the milling machine spindle, tool holders can be switched out in seconds. To remove a tool holder, depress the brass locking button and rotate the collar on the R8 body. When a new tool holder is inserted, a spring-loaded pin snaps the collar back into the locked position.