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Horntools deflection pulley for electric winches, 9 t breaking load

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horntools deflection pulley
Suitable for ropes up to a diameter of 15 mm with a working load of 3500 kg.


  • Theoretical breaking load with exactly straight pull 15 t
  • Breaking load with twisted, tilted shackle at least 9 t
  • Roll diameter: 110mm
  • Dimensions (LxWxH) 270 x 130 x 37 mm
  • Weight: 3.2kg

Equipment and use

  • Parallel tabs
  • Grease nipple

The deflection pulley may only be used in ground pull. In cable winch mountaineering operations, it is suitable for cable winches with a pulling force of up to 5 t.

The pulley is not suitable for lifting loads. It is also only suitable for wood moving work to a limited extent, as the roller was designed for recovery winches with a maximum speed of 20m/min.

My opinion

Good quality, has withstood all strains for years without any problems! Definitely recommended for winches with steel cables. However, since I switched to a plastic winch rope, I have been using either the ARB 9000, an NMP block, but I prefer the Factor55 Rope Retention Pulley. With plastic ropes there is always the risk that they will get stuck between the side wall and the roller of the steel pulley and can then usually only be removed again with damage.


Using a deflection pulley, the pulling force of a winch is doubled or the winch only has to provide half the power to tow a vehicle free. In return, towing only takes place at half speed.
The use of a deflection pulley, also known as a snatch block, always makes sense when considerable pulling force is necessary to recover a vehicle, for example when the underbody of the vehicle rests on the ground and all wheels rotate freely.
Because the winch only has to pull with half the force when using a deflection pulley, it also uses significantly less electricity. With a pulling force of 8,000 pounds, a winch with a maximum pulling force of 12,500 pounds needs 246 amps, with 4,000 pounds it only needs 154 amps. A conventional alternator cannot provide such currents, but a significant proportion of them 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, for a 3 meter long cable (6 meters there and back) with a 25 mm² cross section, the voltage drop at 245 amps is 1.03 volts.

A pulley is used as a pulley as follows: The winch rope is unwound to twice its length, placed around the pulley, led back to the vehicle and hooked onto it. The pulley is attached to a tree or other secure anchor point using a shackle and a tree anchor strap, for example.

Another advantage: The specified maximum pulling force of the winch is only achieved on the last layer of the winch rope, i.e. the longer the rope length is used, the higher the actual pulling force.

I only recommend simple steel pulleys (like those from Horntools or T-Max) for winches with steel cables. If a plastic rope is used, there is a risk that the rope will get stuck between the side wall and the pulley and be destroyed. This risk does not exist with high-quality steel pulleys such as ARB 9000 and Bushranger RBS11.
With synthetic rope, I personally only use so-called pulleys such as NMP or the Factor55 with Rope Retention System.