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Home > Products > All Collections > Manual Lifting Equipment > Snatch Block > Double Sheave Snatch Block

Double Sheave Snatch Block

Name: Double Sheave Snatch Block
Brand: H-Lift Industries Co Ltd
SKU: 1703
Availability: InStock
Rating: 5 (1 reviews)

No.1703

The H-Lift Double Sheave Snatch Block (HD/ED Type) is a heavy-duty pulley system featuring two mounted sheaves. It is designed to redirect wire rope twice, effectively doubling the mechanical advantage for complex lifting and pulling operations.

Enhanced Mechanical Advantage: The dual-sheave design significantly reduces the effort required to move heavy loads, especially with hand-operated winches.
Versatile Attachment: Available with either a secure lifting Hook (HD type) or an Eye fitting (ED type) to easily adapt to various rigging setups.
Flexible Capacity: Engineered to handle demanding industrial tasks with rated Working Load Limits ranging from 0.5 tonnes up to 10 tonnes.
Broad Applications: Highly effective for heavy-duty load redirection in construction, logging, and general industrial environments.

Technical Data
What is Double Sheave Snatch Block

*Compound Power: Two sheaves allow for higher mechanical advantage, reducing the effort needed to lift heavy loads.

*Quick Reeving: Side opening design allows fast wire rope insertion without removing fittings.

Product Features

Increased Mechanical Advantage: Equipped with two sheaves, allowing for the creation of compound pulley systems that significantly reduce the effort required to lift or pull heavy loads (ideal for block and tackle setups).
Versatile Head Options: Available with either a Swivel Hook (HD Type) for quick attachment with a safety latch, or a Fixed Eye (ED Type) for secure, permanent rigging connections.
Durable Sheaves: Features robust cast iron sheaves designed to withstand heavy use and reduce wear on the wire rope.
Self-Lubricating Bushings: Fitted with powder metallurgy bushings that offer improved oil retention, ensuring smooth rotation and reduced maintenance needs.
Wide Capacity Range: Available in Working Load Limits (WLL) from 0.5 Ton up to 10 Ton.
Safety Factor: Designed with a 4:1 safety factor for reliable operation in construction, logging, and industrial applications.

Technical Specifications

*Refer to the diagram above to identify dimensions A1 (Hook), A2 (Eye), B, and C in the table below.

Item No.		Sheave Dia.	Capacity	Dimensions (mm)				Wire Rope Dia.	Net Weight	Product Code
Hook	Eye	(mm)	(t)	Hook (A1)	Eye (A2)	B	C	(mm)	(kg)	Product Code
HD075005	ED075005	75	0.5	286	227	87	77	8	2.8	170300500
HD100010	ED100010	100	1.0	311.5	284.5	112	88	10	4.3	170301000
HD125015	ED125015	125	1.5	370	344	140	100	13	7.8	170301500
HD150020	ED150020	150	2.0	442.5	417	168	146	16	12.2	170302000
HD180030	ED180030	180	3.0	498	478	204	157	19	18.5	170303000
HD200040	ED200040	200	4.0	590.5	556	226	188	22	31.0	170304000
HD250050	ED250050	250	5.0	706.5	651	276	220	25	49.8	170305000
HD300060	ED300060	300	6.0	795	775	330	238	26	72.0	170306000
HD350100	ED350100	350	10.0	934	898	395	260	28	102.0	170310000

Hook Type (HD)

Eye Type (ED)

H-Lift Double Sheave Snatch Block Side View

Side Opening Feature

What is a Double Sheave Snatch Block?

A double sheave snatch block is a specialized pulley system designed with two independent sheaves (grooved wheels) mounted within a single housing. Similar to a single sheave block, it features a side-opening mechanism that allows a wire rope or cable to be threaded (reeved) onto the sheaves without threading the entire length of the rope.

Applications & Mechanical Advantage

These blocks are essential in construction, logging, and industrial settings where heavy loads must be lifted or moved. They are specifically engineered for scenarios requiring:

Load Redirection: Changing the angle of the pull to navigate obstacles.
Increased Power: Situations where the winch or hoist capacity alone is insufficient.

The Power of Mechanical Advantage

The primary benefit of a double sheave block is the ability to create a compound pulley system.

By routing the wire rope through multiple sheaves (redirecting the force twice or more), you can effectively double or triple the mechanical advantage. This significantly reduces the effort required to move a load, which is critical when using hand-operated winches or when the load exceeds the single-line pull capacity of the winch.

Selection Guide

Double sheave snatch blocks come in a wide range of sizes and capacities. To ensure safety and efficiency, consider the following factors:

Working Load Limit (WLL): Must exceed the total load applied to the block (remember that angles increase load).
Wire Rope Diameter: The sheave groove must match the size of your cable to prevent damage.
Sheave Diameter: Larger sheaves reduce bending fatigue on the wire rope.
Environment: Consider corrosion resistance (e.g., galvanized finish) for outdoor or marine use.