McMaster-Carr logo
    Filter by
    Belt Trade Size
    Industrial Info Compare
    System of Measurement
    Outer Circumference
    Attribute Image
    V-Belt Type
    Number of Bands
    Belt Type
    Color
    Reinforcement Material
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Snippet
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Performance
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    Help me decide (beta)
    9 Products
    About Belts
    industrial info icon

    Measure your old V-belt, timing belt, or pulleys to find the right belt replacement if you don’t know the trade size.

    V-Belts

    Image of Product. Front orientation. V-Belts. V-Belts.
    Image of Attribute. Front orientation. Contains Annotated. V-Belts.
    3L Trade Size, 4L Trade Size, and 5L Trade Size—2L, 3L, 4L, and 5L V-belts are commonly used on light duty drives with fractional-horsepower motors.
    A Trade Size and B Trade Size—A, B, and C V-belts are for medium and heavy duty drives.
    Belt Trade
    No.
    Outer
    Circumference
    No. of
    Bands
    Material
    Reinforcement
    Material
    Color
    Each
    3L Trade Size—3/8" Wide × 7/32" Thick
    3L43043"1EPDM
    		Polyester PlasticBlack6190K57000000
     
    4L Trade Size—1/2" Wide × 5/16" Thick
    4L43043"1EPDM
    		Polyester PlasticBlack6191K3600000
     
    5L Trade Size—21/32" Wide × 3/8" Thick
    5L43043"1EPDM
    		Polyester PlasticBlack6192K4600000
     
    A Trade Size—1/2" Wide × 5/16" Thick
    A4143"1EPDM
    		Polyester PlasticBlack6186K14100000
     
    B Trade Size—21/32" Wide × 13/32" Thick
    B4043"1Buna-N/SBRPolyester PlasticBlack6187K13100000
     

    Cogged V-Belts

    Image of Product. Front orientation. V-Belts. Cogged V-Belts.
    Image of Attribute. Front orientation. Contains Annotated. Cogged V-Belts.
    More flexible than smooth V-belts, these have notches that allow them to bend around small-diameter pulleys and accommodate twists and turns on curved drives.
    Belt Trade
    No.
    Outer
    Circumference
    No. of
    Bands
    Material
    Reinforcement
    Material
    Color
    Each
    AX Trade Size—1/2" Wide × 0.3125" Thick
    AX4143"1EPDM
    		Polyester PlasticBlack6054K111000000
     
    BX Trade Size—21/32" Wide × 0.4063" Thick
    BX4043"1EPDM
    		Polyester PlasticBlack6057K11700000
     

    Precision V-Belts

    Image of Product. Front orientation. V-Belts. Precision V-Belts.
    Ensure even load distribution on drives with multiple belts. These are matched to the trade size within a tight tolerance for better performance and reduced wear compared to standard A- and B-section V-belts.
    Belt Trade
    No.
    Outer
    Circumference
    No. of
    Bands
    Material
    Reinforcement
    Material
    Color
    Each
    A Trade Size—1/2" Wide × 5/16" Thick
    A4143"1EPDM
    		Polyester PlasticBlack7821T26000000
     
    B Trade Size—21/32" Wide × 13/32" Thick
    B4043"1EPDM
    		Polyester PlasticBlack7899K40100000
     
    back to top