End Mill Tool Holders | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For End Mill Shank Diameter For End Mill Shank Diameter

	Shank Type Shank Type

	For Holding For Holding

	Size Size

	Collet Type Collet Type


R8	ER-32

ER-25	100-TG

ER-11	ER-16

ER-20

	Head Diameter Head Diameter

	Head Length Head Length

	For Number of End Mill Milling Ends For Number of End Mill Milling Ends

	Grip Range Grip Range

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For Collet Type For Collet Type

	Overall Length Overall Length

	Projection Projection

	Manufacturer Model Number Manufacturer Model Number

	Shank Thread Size Shank Thread Size

7/16"-20

5/8"-11

	Thread Size Thread Size

	Grip Angle Grip Angle

15°

30°

45°

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Shank Diameter Shank Diameter

3/4"

	Specifications Met Specifications Met

JIS

ISO

DIN

	TIR (Total Indicated Runout) Accuracy TIR (Total Indicated Runout) Accuracy

0.0005"

0.0007"

0.0011"

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

Forward

How can we improve?

278 Products

End Mill Holders and Adapters

CAT 40 Taper End Mill Holders

Securely grip end mills in machines with a CAT 40 taper spindle.

R8 Taper End Mill Holders

Hold end mills, drills, and reamers securely in manual milling machines that have an R8 taper spindle.

End Mill Extensions

Extend the reach of an end mill.

Morse Taper to R8 Taper Milling Machine Adapters

Convert tools with a Morse taper shank to an R8 shank for use in manual milling machines that have an R8 taper spindle.

Collets

Collet Chucks

Hold collets in the spindle of a milling machine.

R8 Collets

Use these collets to securely hold round-shank tool bits in the R8 spindle of a milling machine.

ER-32 Collets

Install into an ER-32 collet chuck or holder to tightly grip round-shank tool bits in milling machines.

ER-25 Collets

Use these collets in milling machines that have an ER-25 collet chuck. With a round face and adjustable body, they compress to grip round-shank drill bits, end mills, reamers, and taps.

100-TG Collets

Install into a 100-TG collet chuck or holder to tightly grip round-shank tool bits in milling machines.

ER-16 Collets

Install into an ER-16 collet chuck or holder to tightly grip round-shank tool bits in milling machines.

ER-20 Collets

Install into an ER-20 collet chuck or holder to tightly grip round-shank tool bits in milling machines.

ER-11 Collets

Install into an ER-11 collet chuck or holder to tightly grip round-shank tool bits in milling machines.

R8 Collet Sets

Use these collets to securely hold round-shank tool bits in the R8 spindle of a milling machine.

Retention Knobs

Attach tool holders such as collet chucks and end mill holders to your CNC machine’s spindle.

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.