Step Pulleys | McMaster-Carr

	System of Measurement System of Measurement

Inch

	For Shaft Diameter For Shaft Diameter

1/2"

5/8"

3/4"

	Number of Grooves Number of Grooves

	For Shaft Type For Shaft Type

	Keyed
	Round

	ID ID

1/2"

5/8"

3/4"

	OD OD

	For Belt Trade Size For Belt Trade Size

	Pulley Type Pulley Type

	Standard

	Width Width

	For V-Belt Type For V-Belt Type

	Standard

	Pitch Diameter Pitch Diameter

	Bore Type Bore Type

	Finished

	For Belt Type For Belt Type

	Body Type Body Type

Solid

	Groove Depth Groove Depth

1/2"

	Shaft Mount Type Shaft Mount Type

Set Screw

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

REACH Compliant

	Material Material

Zinc

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

RoHS Compliant

	Keyway Width Keyway Width

3/16"

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

DFARS Specialty Metals
COTS-Exempt

	Keyway Depth Keyway Depth

3/32"

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18 Products

Adjustable-Speed V-Belt Pulleys

3 Grooves

4 Grooves

Also known as step-cone pulleys, these have multiple groove sizes so you can quickly change rotation speed by moving your belt to a different groove. Use with fractional-horsepower motors for drives with frequent speed changes.

For technical drawings and 3-D models, click on a part number.

					Keyway
No. of Grooves	OD (Pitch Dia.)	For Shaft Dia.	Wd.	Groove Dp.	Wd.	Dp.	Material	Body Type	Includes		Each
For 4L, A Belts
3	1 3/4" (1 1/2"), 2 1/4" (2"), 2 3/4" (2 1/2")	1/2"	1 3/4"	0.5"	__	__	Zinc	Solid	One Set Screw	0000000	000000
3	1 3/4" (1 1/2"), 2 1/4" (2"), 2 3/4" (2 1/2")	5/8"	1 3/4"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
3	1 3/4" (1 1/2"), 2 1/4" (2"), 2 3/4" (2 1/2")	3/4"	1 3/4"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
3	2" (1 3/4"), 3" (2 3/4"), 4" (3 3/4")	1/2"	1 7/8"	0.5"	__	__	Zinc	Solid	One Set Screw	0000000	00000
3	2" (1 3/4"), 3" (2 3/4"), 4" (3 3/4")	5/8"	1 7/8"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
3	2" (1 3/4"), 3" (2 3/4"), 4" (3 3/4")	3/4"	1 7/8"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
3	3" (2 3/4"), 3 1/2" (3 1/4"), 4" (3 3/4")	1/2"	1 3/4"	0.5"	__	__	Zinc	Solid	One Set Screw	0000000	00000
3	3" (2 3/4"), 3 1/2" (3 1/4"), 4" (3 3/4")	5/8"	1 3/4"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
3	3" (2 3/4"), 3 1/2" (3 1/4"), 4" (3 3/4")	3/4"	1 3/4"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
4	1 3/4" (1 1/2"), 2 1/4" (2"), 2 3/4" (2 1/2"), 3 1/4" (3")	1/2"	2 5/16"	0.5"	__	__	Zinc	Solid	One Set Screw	0000000	00000
4	1 3/4" (1 1/2"), 2 1/4" (2"), 2 3/4" (2 1/2"), 3 1/4" (3")	5/8"	2 5/16"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
4	1 3/4" (1 1/2"), 2 1/4" (2"), 2 3/4" (2 1/2"), 3 1/4" (3")	3/4"	2 5/16"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
4	2" (1 3/4"), 2 1/2" (2 1/4"), 3 1/2" (3 1/4"), 4" (3 3/4")	1/2"	2 1/2"	0.5"	__	__	Zinc	Solid	One Set Screw	0000000	00000
4	2" (1 3/4"), 2 1/2" (2 1/4"), 3 1/2" (3 1/4"), 4" (3 3/4")	5/8"	2 1/2"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
4	2" (1 3/4"), 2 1/2" (2 1/4"), 3 1/2" (3 1/4"), 4" (3 3/4")	3/4"	2 1/2"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
4	3" (2 3/4"), 3 1/2" (3 1/4"), 4" (3 3/4"), 4 1/2" (4 1/4")	1/2"	2 5/16"	0.5"	__	__	Zinc	Solid	One Set Screw	0000000	00000
4	3" (2 3/4"), 3 1/2" (3 1/4"), 4" (3 3/4"), 4 1/2" (4 1/4")	5/8"	2 5/16"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000
4	3" (2 3/4"), 3 1/2" (3 1/4"), 4" (3 3/4"), 4 1/2" (4 1/4")	3/4"	2 5/16"	0.5"	3/16"	3/32"	Zinc	Solid	One Set Screw	0000000	00000