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Timing Belt Survey

Timing Belt Survey. 3 December 2008. Outline. Belt Types Polyurethane Metal Tension Measurement [2] Sonic Pencil. Belt Types. Polyurethane Lighter, lower inertia Deformation depends on load and speed High precision under lower loads and speeds Metal

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Timing Belt Survey

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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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