3.75 OD 5/8 Bore 1 Groove Pulley

Item Number: 1-BK36-B

Price: $11.80
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3.75 OD 5/8 Bore 1 Groove Pulley

3.75 OD 5/8 Bore 1 Groove Pulley

item number: 1-BK36-B PRICE: $11.80 14 In Stock Regular Stock Item

Available for curbside pickup in our Lincoln, NE location
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3.75 OD 5/8 Bore 1 Groove Pulley
Item Number: 1-BK36-B
Price: $11.80
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* UPS 3-Day, 2-Day, and Next Day orders entered before 1pm (CST) Mon-Fri will be shipped the same day. Orders entered Sat or Sun will be shipped the following Monday.
  • This item is on page 142 of our current catalog
Brand new. Fractional HP, single groove, cast iron pulley with keyway and one set-screw. For use with type "A" and "B" belts. Fully balanced.
  • Bore 5/8"
  • Outside Diameter 3.75"
  • Belt Type A (1/2") Datum Diameter 3.00"
  • Belt Type B (5/8") Datum Diameter 3.40"
  • Shpg. 2 lbs.

Outside Diameter Diameter measured at the outside of the pulley.

Datum Diameter The datum diameters are an industry standard reference point used for calculations such as center distance and belt length. The datum system replaces the pitch system for classical belts and pulleys to compensate for differences in manufacturers construction of belts.
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I need a pulley that will have an outsde diameter of 3.75" with a 4L belt. I am tryin to increase fan speed from a 3" to 3.75" on motor shaft. Tim

A: The back side of a 4L belt will ride at roughly 3.875" on item 1-BK45, and 3.575" on 1-BK40. Keep in mind that the increase of horsepower demand is the cube of the quotient of the two different speeds multiplied by the original horsepower, and can lead to dramatic changes in demand with a relatively small increase in speed. Research 'Basic Fan Laws' on the internet: a quick example showed that with the 19% increase in speed such as you are planning changed the horsepower draw of a fan which required a 1/2 hp to over 3/4" hp. When the motor power is not increased accordingly, this can lead to issues.

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Item Number: 1-BK36-B
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3.75 OD 5/8 Bore 1 Groove Pulley
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