We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Metal V-belt pulley with single groove and quick-detachable bushed bore

Tb Wood'S

Tb Wood'S 581B Quick Detachable Bushed Bore 1 Groove V-Belt

SKU CH-4F4D-2A7TA

Quick-detachable bushed bore V-belt pulley fits 1/2 in to 1-15/16 in shafts with 5.4 in A/AX/4L and 5.8 in B/BX/5L pitch diameters

  • TypeSheaves & Pulleys
  • Quick-detachable bushing speeds pulley changes
  • Single-groove design fits 4L, 5L, A, AX, B, BX belts
  • 4 in pitch diameter for A/AX and 4L sizes
  • 8 in pitch diameter for B/BX and 5L sizes
  • Bore range 1/2 in to 1-15/16 in covers many shafts

Quick Detachable Bushed Bore Sheave

This TB WOODS 581B sheave accepts a quick-detachable bushing for shaft sizes from 1/2 in to 1-15/16 in. It is built for light-to-medium industrial drives where frequent belt changes or shaft-size adjustments are needed. The single-groove design suits standard V-belt sections used on fans, pumps and conveyors.

Installation and common issues

Slide the bushing into the sheave, align the non-threaded holes with the threaded holes in the hub, insert capscrews finger-tight, then torque alternately to seat the taper evenly. Over-tightening one screw first cocks the bushing and cracks the hub. Forgetting to deburr the shaft keyway often prevents the bushing from gripping fully.

Belt capacity and limits

The sheave provides a 5.4 in pitch diameter for 4L, A and AX belts and a 5.8 in pitch diameter for 5L, B and BX belts. These diameters cover typical speed ratios on fractional-horsepower motors up to about 5 hp. It cannot accommodate C-section or 5V-section belts, so drives needing higher tension or larger centre distances require a different sheave.

Highlights

  • Quick-detachable bushing speeds pulley changes
  • Single-groove design fits 4L, 5L, A, AX, B, BX belts
  • 4 in pitch diameter for A/AX and 4L sizes
  • 8 in pitch diameter for B/BX and 5L sizes
  • Bore range 1/2 in to 1-15/16 in covers many shafts

Specifications

TypeSheaves & Pulleys

Questions about this item

How can I confirm the 581B pulley is running true after installation?

Check that the belt tracks centrally in the single groove without wobble and measure the 5.4 in A-pitch or 5.8 in B-pitch diameter with a caliper to match the specification.

What comes with the 581B and what must I source separately?

The pulley includes the quick-detachable hub; you must buy a compatible QD bushing with a 1/2 in to 1-15/16 in bore and the correct 4L, 5L, A, AX, B or BX belt separately.

Which belt trade size should I select for the 5.8 in pitch diameter?

Choose B or BX belts for the 5.8 in B-pitch diameter; use A or AX belts if your drive requires the 5.4 in A-pitch diameter instead.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.