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Tb Wood'S 903B 3-groove V-belt pulley, quick-detachable bushed bore, metal finish

Tb Wood'S

Tb Wood'S 903B Quick Detachable Bushed Bore 3 Groove V-Belt

SKU CH-8XXT-RYMJ6

Three-groove V-belt pulley with quick-detachable bushed bore for 4L, 5L, A, AX, B and BX belts, offering 8.6 in pitch diameter on A-series and 9 in on B-series

  • TypeSheaves & Pulleys
  • Quick-detachable bushing enables fast belt changes
  • Three-groove design accepts 4L, 5L, A, AX, B and BX belts
  • 4L and A belts run on 8.6 in pitch diameter
  • B and BX belts run on 9 in pitch diameter
  • Compatible with SK quick-detachable bushings from 1/2 in to 2-1/2 in

Quick-Detach Bushed Bore Pulley

The TB Woods 903B is a three-groove V-belt pulley designed for industrial power-transmission drives. It accepts a quick-detachable bushing so the bore can be changed without removing the shaft. The unit suits maintenance teams who need fast sheave swaps on existing drive lines.

Bushing Compatibility Changes Installation

The pulley is machined for an SK-series quick-detachable bushing covering 1/2 in to 2-1/2 in bore range. Using this bushing type lets technicians lock or release the sheave with hand tools instead of pressing or keying a fixed bore. No additional hardware or lubricants are included in the package.

Verify Belt Size And Shaft Diameter First

Confirm the drive uses 4L, 5L, A, AX, B or BX belts because the pitch diameters are 8.6 in for the A-series and 9 in for the B-series. Ensure the motor or driven shaft falls within the 1/2 in to 2-1/2 in window so the SK bushing can clamp correctly. Buyers needing C, CX, 3V, 5V or other belt sections cannot use this sheave.

Highlights

  • Quick-detachable bushing enables fast belt changes
  • Three-groove design accepts 4L, 5L, A, AX, B and BX belts
  • 4L and A belts run on 8.6 in pitch diameter
  • B and BX belts run on 9 in pitch diameter
  • Compatible with SK quick-detachable bushings from 1/2 in to 2-1/2 in

Specifications

TypeSheaves & Pulleys

Questions about this item

Will the SK bushing need periodic replacement on the 903B pulley?

The SK bushing is a wear item; inspect it for fretting or elongation whenever belts are changed and replace it if the bore shows damage.

Which diameter limits belt life first during continuous operation?

The 9 in B/BX pitch diameter governs belt speed and tension, so it becomes the limiting factor before the 8.6 in A/AX diameter.

How much heat does the 903B generate when running all day?

The cast-iron sheave dissipates heat through its 8.6 in and 9 in pitch surfaces; no forced cooling is required for normal duty cycles.

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