Per Grok:
S5M-25-515 is a timing belt (synchronous belt) designation commonly used in industrial automation, robotics, CNC machines, 3D printers, and other precision power transmission applications.
Here’s the breakdown of the code:
| Part of Code | Meaning | Details for S5M-25-515 |
|---|---|---|
| S5M | Pitch type and size | S = Super Torque (high-torque version of HTD) |
| 5M = 5 mm pitch (distance between teeth) | ||
| 25 | Belt width in mm | 25 mm wide |
| 515 | Pitch length in mm | 515 mm total circumference (measured along the pitch line) |
Key Specifications
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Tooth profile: Rounded (curvilinear) – similar to HTD but optimized for higher torque
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Pitch: 5 mm
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Number of teeth: 515 mm ÷ 5 mm = 103 teeth
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Width: 25 mm
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Common material: Neoprene rubber with fiberglass tensile cords (sometimes steel cords for heavy duty)
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Typical pulleys needed: S5M pulleys with 103 teeth would make a closed loop, but usually used with smaller drive/driven pulleys
Equivalent or Similar Belts
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HTD 5M belts (very close, sometimes interchangeable)
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Gates PowerGrip GT2 or GT3 5M (slightly different profile but similar performance)
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Some brands label it as 515S5M25 (e.g., Bando, Mitsuboshi, Optibelt, ContiTech)
Common Applications
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CNC routers (especially larger ones)
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Industrial robots
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Heavy-duty linear actuators
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Large-format 3D printers
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Automation equipment requiring high torque and precise positioning
In short: The S5M-25-515 is a 25 mm wide, 515 mm long, 5 mm pitch high-torque synchronous timing belt with 103 teeth.