Snatch Blocks
Sheave Pulley Block Single With Hook B Type
A single sheave pulley block with a B-type hook, designed for directional force change in rigging and lifting operations. The block features a grooved sheave mounted on a rotating axle, allowing smooth rope or cable movement. Available in sizes from 3" 0.5T to 10" 5T, it supports a range of industrial applications where compact, reliable redirection is needed. The B-type hook provides secure attachment and load transfer.
- Size
- 3" 0.5T, 4" 1T, 5" 1.5T, 6" 2T. 7" 3T 8" 4T 10" 5T
- Catalogue Family
- Snatch Blocks
- Certificates
- EN 10204 3.1 material test certificate on request
CAD files are supplied on request via WhatsApp or email rather than published for open download.
Key Benefits
What Sheave Pulley Block Single with Hook B Type Gives You
- Reduces rope friction and wear by allowing the sheave to rotate freely under load
- Enables directional force change without altering the mechanical advantage of the system
- Compact design fits in tight spaces on cranes, winches, and hoists
- B-type hook offers secure attachment and load transfer with a closed throat
- Smooth rotation minimizes resistance and improves lifting efficiency
- Standard 4:1 design factor ensures safe working load limits are maintained
- Easy to inspect and maintain with accessible sheave axle and visible hook condition
Application Scenarios
Where Sheave Pulley Block Single with Hook B Type Is Used
- Construction site rigging where a line needs to be redirected around beams or structural supports
- Marine and offshore operations using a pulley block to guide mooring lines or anchor cables
- Truck and trailer tie-down systems where a rope must be redirected to secure cargo
- Cranes and hoists using the block as a fixed or moving element in a block and tackle setup
- Industrial maintenance where a pulley block redirects a hoist line for equipment handling
- Rescue operations requiring a reliable, lightweight redirection point for rope systems
- Material handling in ports where a pulley block changes line direction on a gantry or dockside winch
Who It Is For
Buyers This Product Is Built For
- Rigging contractors sourcing a single pulley block for directional redirection in lifting tasks
- Marine equipment suppliers specifying pulley blocks for mooring and anchor systems
- Truck and trailer manufacturers integrating pulley blocks into tie-down winch kits
- Cranes and hoist integrators using the block as a component in lifting assemblies
- Industrial maintenance teams needing a durable, low-friction redirection device
- Rescue and safety teams specifying pulley blocks for rope rescue systems
- Manufacturers of lifting equipment requiring a standardized pulley block with a B-type hook
Problems It Solves
Problems This Product Removes
- Rope chafing and premature failure caused by a fixed redirection point with no rotation
- High friction and reduced efficiency when pulling a line over a rigid anchor point
- Inadequate hook design leading to accidental rope slippage during load transfer
- Need for multiple components to achieve both a hook and a rotating sheave
- Lack of a compact, field-ready pulley block that can be mounted directly on a load
- Difficulty in maintaining consistent rope alignment when changing direction
- Overloading risks due to unclear or missing working load limits on the device
Technical Features
Technical Features
- Single sheave with a grooved wheel designed to guide rope or cable
- Rotating axle allows free rotation under load to reduce friction
- B-type hook with closed throat for secure load attachment
- Standard 4:1 design factor with minimum breaking load four times the safe working load
- Working load limit and traceability marking stamped on the body
- Sheave axle with lubrication point to maintain smooth operation
- Drop-forged or machined body in alloy steel for strength and durability
Specifications
Sheave Pulley Block Single with Hook B Type Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 0.5T to 5T safe working load |
|---|---|
| Sheave Diameter | 3” to 10” |
| Rope Diameter | 8 mm to 25 mm |
| Net Weight | 1.3 kg to 18 kg |
| Design Factor | 4:1 minimum breaking load to safe working load |
| Hook Type | B-type closed throat hook |
| Surface Finish | Zinc plated or powder coated on request |
| Material | Drop forged alloy steel quenched and tempered |
Full size table on request. The catalogue publishes a full dimension and capacity table for this item. Ask on WhatsApp or by email and we will send it as a PDF.
Materials
Materials And Finishes
- Drop forged alloy steel body, quenched and tempered for impact and fatigue resistance
- Heat-treated steel sheave axle for long service life under repeated rotation
- B-type hook made from high-strength alloy steel with closed throat design
- Zinc plating or powder coating applied for corrosion resistance in outdoor and marine environments
Manufacturing Process
How This Product Is Made
1Drop forging of the pulley block body and hook blank
2Quench and temper heat treatment for strength and toughness
3Machining of the sheave groove, axle bore, and hook throat
4Assembly of the sheave on the axle with bearing or bushing
5Surface finishing by zinc plating or powder coating as ordered
6Stamping of working load limit and traceability markings
7Proof load testing and final inspection before packing
Quality Control
Quality Control On Every Batch
- Proof load test on production batches before release
- Dimensional tolerance check against published size table
- Breaking strength validation to confirm 4:1 design factor
- Free rotation and end float check on the sheave axle
- Material Test Certificate to EN 10204 3.1 issued with the order
- Third-party inspection accepted at the Qingdao warehouse before shipment
Customisation
Customisation Options
- Custom tonnage stamping on the body
- Private label and OEM marking available
- Surface finish to order: zinc plated, powder coated, or electrophoretic black
- Custom sizes and configurations built to a supplied drawing
- Packing carton and pallet configuration tailored to your warehouse or retail needs
Compare
How It Compares With The Alternatives
An honest read on where this pattern wins and where another one would serve you better.
| Alternative | Honest Trade Off |
|---|---|
| Fixed pulley block | The rotating sheave reduces rope friction and wear, but a fixed block is simpler and has no moving parts to fail |
| Snatch block with swivel hook | This B-type hook is more secure for static or low-vibration use, but a swivel hook allows rotation in multiple planes |
| Double sheave block | Single sheave offers lower weight and cost, but a double sheave provides mechanical advantage and higher load capacity |
| Rigid shackle with rope guide | The pulley block reduces friction and protects the rope, but a shackle is lighter and simpler for one-time redirection |
Use Guide
How To Use And Inspect Sheave Pulley Block Single with Hook B Type
- Verify the stamped safe working load matches the calculated line tension before use
- Inspect the hook, sheave, axle, and bearing for deformation, cracks, or wear before each operation
- Lubricate the sheave axle regularly to maintain smooth rotation and reduce friction
- Ensure the rope runs in the sheave groove and not on the outer edge or body
- Avoid side loading the block; keep the pull aligned with the sheave axis
- Do not grasp the moving rope by hand during lifting or lowering
- Retire the block if the sheave seizes, the hook deforms, or the marking is illegible
Related Products
Often Ordered With This Item
Trawl Block With Eye Single Wheel
Mounting Block With Hook, Single HQGK
Mounting Block With Eye, Single With A Hinged Lid
Snatch Block with Shackle HDG/ RED Lifting Marine Pulleys
Heavy Duty Snatch Block With Shackle HDG/ RED Lifting Marine Pulleys
Snatch Block With Hook Single Oval Eye Marine Pulleys
Single Sheave Pulley Block With Swivel Oval Eye
Pulley Block Double With Oval Eye B Type
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Answers
Sheave Pulley Block Single with Hook B Type FAQ
What is the safe working load for each size?
Sizes range from 0.5T (3”) to 5T (10”). The full size table lists the S.W.L, rope diameter, and net weight for each model.
Is the sheave free to rotate?
Yes. The sheave is mounted on a rotating axle to allow smooth, low-friction movement under load.
Can I get a Material Test Certificate?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with each order on request.
What finish options are available?
Standard zinc plating or powder coating. Custom finishes including electrophoretic black are available upon request.
Can I have my brand on the block?
Yes. Custom tonnage stamping, private label marking, and OEM packaging are standard options.
How is it packed for export?
Cartons on pallets as standard. We can configure the carton count and pallet pattern to suit your warehouse or retail pack. Free two-month storage in Qingdao is available for shipment consolidation.
What safety factor does it carry?
A standard 4:1 design factor. The minimum breaking load is four times the stated safe working load.
Need A Quote On Sheave Pulley Block Single with Hook B Type
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