The Mechanical Power Transmission Association (MPTA) has developed, and maintains, 6 industry standards associated with Pulleys, Sheaves, and Elastomeric Couplings. Those and other publication can be downloaded free from this site.

STANDARDS:

• Standard Practice Sheave / Pulley Balancing (B2c-2006) - Open Pub B2c
• Elastomeric Coupling Glossary of Terms (MPTA C1c-2008) - Open Pub C1c
• Elastomeric Coupling Alignment Primer (MPTA-C2c-2002R 2010) - Open Pub C2c
  
• Standard Surface Finish for Transmission Pulleys (B4c-2008) - Open Pub B4c
• Bore and Keyway Tolerances for V-Belted Sheaves (B1c-2010) - Open Pub B1c
• Quick Detachable Bushing and Mating Hub (B6i-2010) - Open Pub B6i
• Calculation of V-Belt Tensions And Shaft Loads (B7i-2007) - Open Pub B7i
  

OTHER INFORMATIONAL ITEMS:

• Elastomeric Coupling Primer (MPTA-C4-2008) - Open Pub C4
• Synchronous Drive Identification (B3c-2007) - Open Pub B3c
• Balancing Primer - (MPTA-C3c-2003)Open Primer
• Common Causes of Jaw Coupling Failures - (MPTA-C5c-2010) Open Bulletin
• Sheave Arm Stress Formula (MPTA B8i-2005) - Open Pub B8i-2005
• Style Manual for MPTA Publications - (MPTA-A1-2010) Open Style Manual
• RMA Technical Bulletin IP-3-16: ATmosphere EXplosible (ATEX) An Overview
• RMA Technical Bulletin IP-3-17: Power Transmission Belts - Standard Symbols

The MPTA coordinates with the Rubber Manufacturers Association (RMA) in maintaining seven Belt drive specifications.  The following seven publications can be ordered from the RMA.

• IP-20  Classical Multiple V-Belts (A,B,C., D, and E Cross Sections)
• IP-21  Double V-Belts (AA, BB, CC, and DD Cross Sections)
• IP-22  Narrow Multiple V-Belts (3V, 5V, and 8V Cross Sections)
• IP-23  Single V-Belts (2L, 3L, 4L, and 5L Cross Sections)
• IP-24  Synchronous Belts (MXL, XL, L, H, XH, and XXH Belt Sections)
• IP-25  Variable Speed V-Belts (12 Cross Sections)
• IP-26  V-Ribbed Belts (H, J, K, L, and M Cross Sections)
• IP-27 Curvilnear Toothed Synchronous Belts (H3M, R3M, S3M, H5M, S5M, H8M, R8M, S8M, H14M, R14M, S14M, H20M, AND R20M Belt Pitches