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Metallic four-groove V-belt pulley with quick-detachable bushed bore, silver-grey finish

Tb Wood'S

Tb Wood'S 1244B 4 Groove V-Belt 12 12.4

SKU CH-BMGS-AN4AJ

Four-groove V-belt pulley accepts A, B, 4L and 5L belts with 12 in and 12.4 in pitch diameters for quick-detachable bushings

  • Product typeSheaves & Pulleys
  • Quick-detachable bushing speeds installation and removal
  • Four grooves support A, B, AX and BX belts for versatile drive matching
  • 12 in pitch diameter on A and 4L belts ensures correct speed ratio
  • 4 in pitch diameter on B and 5L belts matches larger-section drives
  • Model 1244B identifies the sheave for accurate replacement ordering

V-Belt Pulley with Quick Detachable Bushing

This cast-iron sheave accepts 4L, 5L, A, AX, B and BX section V-belts for light-duty power transmission. The quick-detachable bushed bore fits shafts from 1/2 in to 2-1/2 in, simplifying installation and removal on industrial drives. Maintenance teams and machine builders use it where rapid belt changes are required.

Thermals Noise and Power Draw

The pulley itself generates no heat, noise or electrical draw; it transmits mechanical power through belt friction. Operating temperature and sound depend entirely on the driven machine, belt tension and alignment. Proper lubrication of the bushing and correct belt tension keep parasitic losses low.

Sustained Load Behaviour

Under continuous operation the sheave maintains consistent pitch diameters of 12 in for A and AX belts and 12.4 in for B and BX belts. The quick-detachable bushing retains clamping force without fretting when torque stays within the belt rating. Regular inspection of groove wear and bushing bolts prevents unexpected slip during extended duty cycles.

How it compares

Measured against everything we stock in Bearings, Belts & Drive Components, at today’s prices. Recalculated every night.

Price $145.99
Pricier than about 89% of the 693 comparable items (median $35.99).

Specifications

Product
Product typeSheaves & Pulleys

Questions about this item

How do I install the 1244B sheave on a Quick Detachable bushing and what step is often missed?

Mount the bushing on the shaft, place the sheave over it, insert and hand-tighten the cap screws, then torque them in a star pattern to the bushing manufacturer's specification; the step often missed is the star-pattern torque sequence.

What maintenance or replacement will the 1244B sheave need over time?

Inspect the 4L, 5L, A, AX, B and BX belt grooves for sidewall wear and the 12 in A/4L/AX and 12.4 in B/5L/BX pitch surfaces for pitting; replace the sheave when groove profile exceeds the belt manufacturer's wear limits.

What limit appears first on the 1244B sheave during sustained high-torque operation?

Belt slip on the 12 in A/4L/AX or 12.4 in B/5L/BX pitch diameters typically occurs before the cast-iron sheave reaches a thermal or structural limit.

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