Description
18H300-6FS8 Timing Pulley, 18 Teeth, H Pitch
The 18H300-6FS8 is a 18-tooth H (0.500 in trapezoidal) timing pulley with a 3/4 in minimum plain bore, machined from steel with a black oxide finish, 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 | 18H300-6FS8 |
| Teeth | 18 |
| Pitch | H (0.500 in trapezoidal) |
| For Belt Width | 3 in |
| Pitch Diameter | 2.8648 in |
| Outside Diameter | 2.8108 in |
| Flange Diameter | 3.1 in |
| Bore | 3/4 in minimum plain bore |
| Face Width | 3.375 in |
| Overall Length | 4.062 in |
| Hub Diameter | 2.25 in |
| Construction | Standard Hub |
| Flange Material | Steel |
| Material | Steel (no sintered or powdered metal) |
| Finish | Black Oxide |
| Weight | 5.9 lb |
| Country of Origin | United States. ISO 9001:2015 certified manufacturing. |
Applications
- Instrumentation, office equipment, and precision positioning drives
- 3D printers and desktop CNC equipment
- Robotics, medical devices, and packaging machinery
Belt Compatibility
The 18H300-6FS8 runs H (0.500 in trapezoidal) belts in 3 in width. The pitch is standardized, so belt and pulley brands can be mixed.
Cross Reference
The 18H300-6FS8 interchanges with these equivalent part numbers, per published manufacturer interchange data:
| Manufacturer | Equivalent Part Number |
|---|---|
| Dodge® | 18H300-MPB |
| Martin | 18H300 |
| TB Woods® | 18H300 |
| Regal Rexnord (Browning®) | 18HB300 |
| Mitsuboshi | 18H300-6FS8 |
| Grainger | 809V50 |
| Powerdrive | 18H300-6FS8 |
| Continental (ContiTech) | 18H300-3/4 |
Always verify dimensions and bore size before substituting part numbers across manufacturers.
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Multi-unit and OEM quantities qualify for volume discounts. Call or email for a quantity quote.
Frequently Asked Questions
What belts fit the 18H300-6FS8 pulley?
H (0.500 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 18H300-6FS8 replace the Dodge 18H300-MPB?
Yes. Published interchange data crosses the 18H300-6FS8 directly to the Dodge 18H300-MPB, as well as Martin 18H300, TB Woods 18H300, Regal Rexnord 18HB300. Verify dimensions and bore before ordering.
Does the 18H300-6FS8 ship from Houston?
Yes. Stock items ship same day from our Houston, Texas warehouse. Call (888) 203-2358 to confirm availability.
Need a quote on 18H300-6FS8?
Houston warehouse, same-day shipping on stock items.
Call (888) 203-2358All 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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