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Metal V-belt pulley with four grooves and tapered bushing bore

Tb Wood'S

Tb Wood'S 424B Quick Detachable Bushed Bore 4 Groove V-Belt

SKU CH-TN9D-BBPRN

Four-groove V-belt sheave with quick-detachable bushed bore fits 1/2 in to 1-15/16 in shafts and handles A, B, 4L and 5L belts at 3.8 in and 4.2 in pitch diameters

  • TypeSheaves & Pulleys
  • Quick-detachable bushing speeds installation and removal
  • Four grooves support multiple belt profiles including A, B, 4L, 5L
  • 8 in pitch diameter on A and 4L belts
  • 2 in pitch diameter on B and 5L belts
  • Fits 1/2 in to 1-15/16 in bore range

Quick Detachable Bore Pulley

The Tb Wood'S 424B is a four-groove V-belt pulley designed for power transmission systems. It uses a quick detachable bushed bore that accepts shaft diameters from 1/2 in to 1-15/16 in. Maintenance teams can swap the pulley without removing the shaft or motor. This design suits industrial machinery where fast changeover reduces downtime.

3.8 in and 4.2 in pitch diameters

The pulley provides a 3.8 in pitch diameter for 4L, A and AX belts and a 4.2 in pitch diameter for 5L, B and BX belts. These two diameters cover the most common light-duty belt cross sections. The unit does not support 3V, 5V, C or CX profiles, so drives requiring those sizes need a different sheave. Four grooves give extra grip for higher torque loads.

QD bushing mount for easy alignment

The quick detachable bushing seats the pulley concentrically on the shaft and locks with cap screws. This method eliminates set-screw marring and allows precise belt alignment during installation. The bore range of 1/2 in to 1-15/16 in fits many standard motor and gearbox shafts. No additional hardware beyond the matching QD bushing is required.

Highlights

  • Quick-detachable bushing speeds installation and removal
  • Four grooves support multiple belt profiles including A, B, 4L, 5L
  • 8 in pitch diameter on A and 4L belts
  • 2 in pitch diameter on B and 5L belts
  • Fits 1/2 in to 1-15/16 in bore range

Specifications

TypeSheaves & Pulleys

Questions about this item

Will the 424B pulley match the 4L and A belts I already use on my 3.8 in pitch diameter setup?

Yes, the 424B lists a 3.8 in pitch diameter for both 4L and A trade sizes, so it will work with those belts.

How can I verify the 424B is seated correctly after installing the quick detachable bushing?

The bushing should draw up evenly, the flange faces should be parallel, and the belt should track centrally in each of the four grooves without wobble.

Does the 424B come with the quick detachable bushing, or must I order it separately?

The 424B is supplied as the sheave only; the quick detachable bushing is sold separately.

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