Companion Pulleys, Timing Belt Pulleys, Variable Speed Pulleys, Multi-V Pulleys

Companion Pulleys

The Model PO Companion Pulleys are specially designed for fractional horsepower drives requiring high strength to weight ratios. With the exception of the PO-1, they feature a unique cost saving combination of glass reinforced nylon with an aluminum hub. The pulley hub is drilled and tapped to include a #10-24 setscrew.

A wide range of shaft bores and pulley diameters can be selected to meet almost any desired speed range.

Companion Pulley standard sizes and types, dimensions and spring pressures are listed below.

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Companion Pulley Dimensions
Part No.	Outside Dia.	Pitch Dia.	A° Angle	Standard Bores				-W- Width
Part No.	Outside Dia.	Pitch Dia.	A° Angle	1/4	5/16	3/8	1/2	-W- Width
PO-1.0	1.0	0.9	32°	•	•			.240	Figure 1
PO-1.5	1.5	1.4	34°	•	•	•	•	.243	Figure 2
PO-2.0	2.0	1.9	36°	•	•	•	•	.246
PO-2.5	2.5	2.4	36°	•	•	•	•	.246
PO-3.0	3.0	2.9	38°	•	•	•	•	.250
PO-3.5	3.5	3.4	38°	•	•	•	•	.250
PO-4.0	4.0	3.9	38°	•	•	•	•	.250
PO-4.5	4.5	4.4	38°	•	•	•	•	.250
PO-5.0	5.0	4.9	38°	•	•	•	•	.250
PO-6.0	6.0	5.9	38°	•	•	•	•	.250

Compound pulleys are available upon request.

Standard Tolerances for Bore Sizes, Keyways and Setscrews

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