System of Measurement
    System of Measurement
    Inch
    Metric
    For Shaft Diameter
    For Shaft Diameter
    1/4"
    1/2"
    3/4"
    1"
    1 1/2"
    2"
    3"
    13mm
    20mm
    25mm
    40mm
    50mm
    75mm
    For Shaft Material
    For Shaft Material
    Aluminum
    Stainless Steel
    Steel
    Static Load Capacity
    Static Load Capacity
    2 lbs.
    10 lbs.
    30 lbs.
    40 lbs.
    145 lbs.
    210 lbs.
    280 lbs.
    Mounting Holes Center-to-Center, Width
    Mounting Holes Center-
    to-Center, Width
    7/8"
    1 1/4"
    1 5/8"
    2"
    3 1/2"
    4 1/8"
    4 1/2"
    Center Height
    Center Height
    3/8"
    9/16"
    13/16"
    15/16"
    1 1/2"
    1 7/8"
    2 1/4"
    DFARS (Defense Acquisition Regulations Supplement)
    DFARS (Defense Acquisition
    Regulations Supplement)
    Maximum Shaft Clearance
    Maximum Shaft Clearance
    0.00075"
    0.00085"
    0.0009"
    0.001"
    0.00105"
    Minimum Shaft Clearance
    Minimum Shaft Clearance
    0.00045"
    0.0005"
    0.00055"
    0.0006"
    Mounting Hole Diameter
    Mounting Hole Diameter
    4 mm
    5 mm
    6 mm
    8 mm
    Mounting Hole Thread Size
    Mounting Hole Thread Size
    M4 × 0.7
    M5 × 0.8
    M6 × 1
    M8 × 1.25
    Mounting Holes Center-to-Center, Length
    Mounting Holes Center-
    to-Center, Length
    3/4"
    1 1/2"
    2 1/2"
    3"
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