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    20 Degree Pressure Angle, 48 diametral pitch, 72 Teeth, brass, internal spur gear

    YI 4872 Brass Internal Spur Gear

    SKU YI 4872
    by Boston Gear
    $209.00 - $209.00
    $209.00
    $209.00 - $209.00
    $209.00
    Contact Us for Availability

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      Product Attributes:
    • 20 Degree Pressure Angle
    • 48 DP
    • 72 Teeth
    • Brass Gears
    • Internal Spur Gears
    • Open Gearing
    • Spur Gears

    Boston Gear’s internal gears are spur gears turned "inside out." In other words, the teeth are cut into the inside diameter while the outside diameter is kept smooth. This design allows for the driving pinion to rotate internal to the gear, which, in turn, allows for clean operation. Intended for light duty applications, these gears are available only in brass. When choosing a mating spur gear, always remember that the difference in the number of teeth between the internal gear and pinion should not be less than 15 (14 1/2° PA) or 12 (20° PA).

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