The product images shown are Illustrative only and may not be an exact representation of the product.

Polyflex® JB® Belts

Polyflex® JB™ is synonymous with high power density in small spaces. Developed by Gates and produced to patented manufacturing processes, these belts provide more load-carrying capacity at higher speeds to small multiple V-belt precision drives. This results in significant cost savings and improved design freedom. Polyflex® JB™ belts are recommended for use on bench type milling machines, lathe drives, woodworking and metalworking machine spindle drives, computer peripheral equipment, small blowers, etc. They are available in 3M-JB, 5M-JB, 7M-JB and 11M-JB sections.

  • High modulus polyurethane compound with a high friction coefficient.
  • The polyurethane compound resists fatigue, wear and ozone.
  • Temperature Range: -65°F to 185°F (-54°C to 85°C).

All Parts

1-10 of 629 Items
Part # Product # Description Effective Length (mm) Section
2/11M1000JB 89142100 2/11M1000JB POLYFLEX 982 11M/JB
3/11M1000JB 89143100 3/11M1000JB POLYFLEX 982 11M/JB
2/11M1030JB 89142103 2/11M1030JB POLYFLEX 1012 11M/JB
3/11M1030JB 89143103 3/11M1030JB POLYFLEX 1012 11M/JB
2/11M1060JB 89142106 2/11M1060JB POLYFLEX 1042 11M/JB
3/11M1060JB 89143106 3/11M1060JB POLYFLEX 1042 11M/JB
2/11M1090JB 89142109 2/11M1090JB POLYFLEX 1072 11M/JB
3/11M1090JB 89143109 3/11M1090JB POLYFLEX 1072 11M/JB
2/11M1120JB 89142112 2/11M1120JB POLYFLEX 1102 11M/JB
3/11M1120JB 89143112 3/11M1120JB POLYFLEX 1102 11M/JB
1-10 of 629 Items

Features and Benefits

  • Excellent adhesion of tensile cords and polyurethane compound leads to high fatigue resistance and long belt life.
  • Small cross-section meets special application needs such as high shaft speeds, small drive package size and smooth running requirements.
  • The 60° angle provides more undercord support to the tensile section and distributes the load more evenly.
  • Ribs relieve bending stress on small pulleys and provide lateral rigidity.
  • Long belt life on small pulleys and compact drives.
  • The precise casting method eliminates overlaps and layers.
  • High performance and smooth running for precision applications.
  • Avoids vibrations when subjected to shock loads.
  • Joined Belt construction improves stability.
  • Greater shaft speeds, up to 30,000 rpm.
  • Cost savings and design freedom.