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Synchronous Pulleys & Timing Pulleys — Specifications Database
Search synchronous pulleys for HTD, GT, and RPP timing belt drives from leading manufacturers. Filter by belt profile, tooth count, pitch, bore, width, and material.
Key Specification Fields
Belt Profile
Must match belt profile exactly: HTD 3M/5M/8M, GT 3M/5M/8M, RPP 5M/8M, XL/L/H
Tooth Count
Number of pulley teeth — determines speed ratio with mating pulley
Pitch Diameter (mm)
Effective pitch diameter = (Teeth × Pitch) ÷ π
Bore
Shaft bore in mm or inches; some are "bushed" for QD or taper-lock bushings
Width (mm)
Must match or exceed belt width
Material
Aluminum (lightweight, most common), Steel (heavy duty), Plastic (light duty, corrosive)
Common Applications
- Servo and stepper motor drives
- CNC machine linear axes
- Printing and converting machinery
- Robotics arm joints
Frequently Asked Questions
How do I calculate timing pulley speed ratio?
Speed ratio = Driver teeth ÷ Driven teeth = Driven speed ÷ Driver speed. For example, a 24-tooth drive pulley turning at 1000 RPM driving a 48-tooth driven pulley gives a 2:1 reduction and 500 RPM output. The speed ratio is exact (synchronous) — no slip.