Description
Representative image shown. Actual product appearance varies by size, bore, and configuration. Refer to the specifications table for exact dimensions of this part number.
72XXHS300 Timing Pulley, 72 Teeth, XXH Pitch
The 72XXHS300 is a 72-tooth XXH (1.250 in trapezoidal) timing pulley. It mounts with an industry-standard bushing, sold separately, machined from cast iron, built for 3 in wide belts. Machined from solid stock, never sintered or powdered metal.
Specifications

Dimension key for this construction type. Values for this part number are in the table below.
| Specification | Value |
|---|---|
| Part Number | 72XXHS300 |
| Teeth | 72 |
| Pitch | XXH (1.250 in trapezoidal) |
| For Belt Width | 3 in |
| Pitch Diameter | 28.6479 in |
| Outside Diameter | 28.5279 in |
| Bore | Accepts S1 bushing (not included) |
| Face Width | 3.688 in |
| Overall Length | 4.938 in |
| Construction | Split Taper Hub |
| Material | Cast Iron (no sintered or powdered metal) |
| Weight | 138 lb |
| Country of Origin | China |
Applications
- Instrumentation, office equipment, and precision positioning drives
- 3D printers and desktop CNC equipment
- Robotics, medical devices, and packaging machinery
Belt Compatibility
The 72XXHS300 runs XXH (1.250 in trapezoidal) belts in 3 in width. The pitch is standardized, so belt and pulley brands can be mixed.
Cross Reference
The 72XXHS300 interchanges with these equivalent part numbers, per published manufacturer interchange data:
| Manufacturer | Equivalent Part Number |
|---|---|
| Regal Rexnord (Browning®) | 72XXHS300 |
| Powerdrive | 72XXHS300 |
Always verify dimensions and bore size before substituting part numbers across manufacturers.
Buying in bulk? Save on volume.
Multi-unit and OEM quantities qualify for volume discounts. Call or email for a quantity quote.
Frequently Asked Questions
What belts fit the 72XXHS300 pulley?
XXH (1.250 in trapezoidal) timing belts in 3 in width from any manufacturer. The pitch is standardized, so belt and pulley brands can be mixed.
Does the 72XXHS300 replace the Regal Rexnord 72XXHS300?
Yes. Published interchange data crosses the 72XXHS300 directly to the Regal Rexnord 72XXHS300, as well as Powerdrive 72XXHS300. Verify dimensions and bore before ordering.
Does the 72XXHS300 ship from Houston?
Yes. Stock items ship same day from our Houston, Texas warehouse. Call (888) 203-2358 to confirm availability.
All third-party part numbers and trademarks referenced are the property of their respective owners. References are for compatibility identification only and do not imply affiliation or endorsement.
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