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    View All Polyflex™ JB™ Belts

    3/7M 670 POLYFLEX JB

    Product # 8913-3670

    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: -54°C to +85°C (-65°F to +185°F).
      Polyflex™ JB™ Belt Brochure

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    • Product Details
      Product # 8913-3670
      Description 3/7M 670 POLYFLEX JB
      Effective Length (in) 26.4
      Effective Length (mm) 670
      Section 7M
      Strand 3
      Top Width (in) 0.28
      Top Width (mm) 7

    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.