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Timing Belt Survey: Belt Types and Tension Measurement Insights

Explore the benefits of polyurethane and metal belt types, along with innovative tension measurement methods such as sonic and pencil types. Discover the advantages of different belt materials in terms of precision, noise reduction, and wear. Recommendations for optimal belt selection and tension measurement tools are provided.

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Timing Belt Survey: Belt Types and Tension Measurement Insights

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  1. Timing Belt Survey 3 December 2008

  2. Outline • Belt Types • Polyurethane • Metal • Tension Measurement[2] • Sonic • Pencil

  3. Belt Types • Polyurethane • Lighter, lower inertia • Deformation depends on load and speed • High precision under lower loads and speeds • Metal • Heavier, potential problem with tracking and sagging • Little to no deformation • High precision[4]

  4. Polyurethane Belt • Self-tracking • BAT10 • Curved teeth • Equal power transmission • Reduced noise • SFAT10 • Displaced by ½ tooth • Reduced noise • Reduced polygonal effect

  5. Metal Belt • Solid Bush Chain • High precision solid bushes • Longer wear (1.2-4X) • Sintered Bush Chain • High precision solid bushes • Longer wear (1.2-4X) • Infrequent lubrication[4]

  6. Tension Measurement • Sonic type[3] • Transdev TSM4 • 7Hz to 400Hz • ±5% Accurate • $1000± • Gates 507C • 10Hz to 5000Hz • $800±

  7. Tension Measurement • Pencil type • A14Z 6-740176 • 30 lb load limit • $16±

  8. Recommendation • Shifted tooth polyurethane belt • Lighter weight • High precision at low relative speeds • Less backlash than regular belts • Pencil-type tension measurement • Much less expensive • Similar accuracy since the distance between pulleys is large

  9. References [1] W. Zhang, T. Koyama “Load Distribution of Metal Timing Belts. DOI: 10.1115/1.1326917. Transactions of the ASME, Page 98, Vol. 123, March 2001. [2] http://www.alliedbearings.com/new_prod/gates/belttension_testers.pdf [3] http://www.stockdriveproducts.com/D265/PDF/D265P1042.pdf [4] http://www.transdev.co.uk/pages/chain/did.htm

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