The pulling force of a winch is doubled by means of a deflection pulley, or the winch only has to produce half the power to tow a vehicle free. In return, it is towed at half speed.
The use of a deflection pulley, English snatch block, is always useful when considerable traction is required to recover a vehicle, e.g. when the underbody is on the ground and all wheels are turning freely.
Because the winch only has to pull with half the force when using a deflection pulley, it also consumes considerably less electricity. For example, the X Power Series EW-12500 draws 246 amps for a pull of 8,000 pounds, and 154 amps for a pull of 4,000 pounds. A conventional alternator cannot provide such currents, but a significant proportion of it comes from the battery, especially when idling. In addition, the higher the current that flows through the cable from the battery to the winch, the higher the voltage drop on the cable. And this results in lower engine performance. For example, with a 3 meter long cable (there and back 6 meters) with a 25 mm² cross-section, the voltage drop is 1.03 volts at 245 amps.
A pulley is used as follows: The winch cable is unwound to twice its length, wrapped around the pulley, fed back to the vehicle and hooked onto it. Then the pulley is attached to a tree, e.g. using a shackle and a tree anchor strap.
T-MAX idler pulleys are made of forged steel with a thickness of 6.35 mm. The axle of the roller is fixed with a snap ring. After removing the snap ring, the idler pulley can be disassembled and lubricated.
Idler Pulley 8,800 (Quad)
With a maximum towing capacity of 2,500 kg and a minimum breaking load of 4,000 kg (28,800 pounds), the 8,800 pulley is specifically sized for quads.
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