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£15.99Snatch Block Pulleys for Winch Recovery
A snatch block is a heavy-duty winch pulley used to change the direction of a winch line or set up a double-line pull for extra mechanical advantage. Snatch blocks are used in 4x4 recovery, vehicle loading, forestry and commercial winching where a straight pull isn't practical, or where you need to reduce the load on the winch.
Our range covers snatch block pulleys from 2.5 to 30 tonne. All orders come with free next-day UK mainland delivery, or you can click and collect from our Rothwell, Leeds site.
Our Snatch Blocks
- Swing away snatch block: 2,500kg to 8,928kg, for steel or synthetic rope up to 16mm. The side plate opens so you can drop the rope in without feeding the end through.
- Wire rope snatch block with swivel hook: 4 to 20 tonne, for steel wire rope only.
- Heavy-duty winch snatch block: 24 and 30 tonne, with cut-away side plates, for heavy commercial recovery winches.
How Snatch Blocks Work
The winch rope runs around the snatch block's sheave, so you can redirect the pull or rig a double-line system. In a correctly arranged double-line pull, the winch gains mechanical advantage and the line load on the winch is reduced. Real-world gain depends on rigging geometry, friction, rope angle and pulley efficiency, so don't assume it will exactly double pulling capacity every time.
Choosing a Recovery Snatch Block
Choose a recovery snatch block by expected line loads, rope type and rigging arrangement, not by winch capacity alone.
- Rated capacity: the block must handle the maximum load in your setup. Loading rises with the angle between the rope legs.
- Rope compatibility: the sheave diameter and groove must suit your steel wire or synthetic rope.
- Sheave condition: the running surface should be smooth, with no burrs, sharp edges or damage that could harm the rope.
- Attachment point: shackles, recovery points and other connectors must also be rated for the forces involved.
Snatch Blocks for Synthetic and Steel Winch Rope
Snatch blocks can be used with steel wire rope or synthetic winch rope when the block is designed and sized for that rope. With synthetic rope, check the sheave for scoring, sharp edges or surface damage that could abrade the fibres. Our wire rope snatch block is for steel rope only.
Single-Line, Double-Line and Directional Pulls
Use a snatch block to redirect the line around an obstacle, or to create a double-line pull back to the vehicle or another anchor. Line angle changes the load on every part of the system, so treat the winch, block, rope, shackles and anchors as one recovery setup. A rope dampener on the line adds protection if anything fails under load.
Not sure which snatch block pulley you need? Contact the Novawinch UK team on 0113 288 7766 for help matching a block to your rope type, winch capacity and rigging.
Frequently Asked Questions
What does a snatch block do?
A snatch block is a pulley used with a winch rope to change the direction of pull or create a multi-line rigging setup. This can help when a straight-line pull is not practical or when additional mechanical advantage is required.
Does a snatch block double a winch's pulling power?
In an ideal double-line setup, a snatch block can provide close to a 2:1 mechanical advantage, reducing the line load seen by the winch. In real-world use, pulley friction, rope angle and rigging geometry reduce the theoretical gain, so it should not be assumed to exactly double pulling capacity in every setup.
How do I choose the right snatch block?
Choose a snatch block that is suitable for your rope type, rope diameter and expected rigging loads. The block, shackle, anchor point and other recovery equipment must all be appropriately rated for the forces created by the chosen setup.
Can I use a snatch block with synthetic winch rope?
Yes, provided the snatch block is suitable for synthetic rope and the sheave is smooth, correctly sized and free from burrs, sharp edges or damage. Inspect the block before use, as rough or scored surfaces can abrade synthetic fibres.
What rating should a snatch block have?
The required rating depends on the load and the angle between the rope legs. Snatch block loading can be higher than the line pull of the winch, particularly when the rope changes direction through a large angle. Always select the block using its stated rating and the expected forces in the complete rigging arrangement rather than relying on winch capacity alone.