50-300KN High Speed Turning Pulley Steel Sheave Turning Block for Sharp Bend Cable Pulling

High Speed Turning Pulley for Cable Pulling Through Bends

Every change of direction in a cable route adds friction, and friction is what limits pull length. This turning block replaces sliding contact at the bend with a rolling steel sheave, so the pull stays within the winch capacity and the cable jacket is not scuffed against a corner.

Product Overview

The range covers 50KN to 300KN with sheave diameters from 308mm to 916mm and widths from 75mm to 125mm. A larger sheave sets a larger turning radius, which lowers side pressure on the cable and reduces the force needed to complete the pull. Steel sheaves are used for durability on abrasive cable and high cycle counts.

Design Features and Field Benefits

• Rolling Contact Replaces Sliding Friction: At a bend the cable rolls over a steel sheave instead of dragging over a corner, which cuts pulling force and protects the jacket.
• Sheave Range Up to 916mm: Large sheaves set a generous turning radius for stiff cable and high tension pulls, reducing side wall pressure at the bend.
• Four Load Ratings From 50KN to 300KN: Select the frame that matches the winch capacity and the cable tension, without over-specifying weight and cost.
• Steel Sheave for Abrasive Duty: Hardened steel resists groove wear on abrasive cable and on routes where the same block is used repeatedly.

High speed turning block models

Dimensions and ratings are nominal. Confirm the exact model against the datasheet before ordering.

Selection Guidance

• Choose the sheave diameter from the cable minimum bend radius, then the frame rating from the pull tension.
• Anchor the block so the resultant force passes through the frame centre.
• Inspect the groove for wear; a worn groove increases contact pressure on the cable.

Typical Applications

• Cable pulling at sharp bends
• Underground duct and conduit installation
• Transmission line conductor stringing
• Fiber optic cable deployment

Frequently Asked Questions

Quality Control and Delivery

Units are assembled in an ISO 9001 certified workshop. Frames are checked for sheave alignment and axle straightness, load bearing parts are inspected before assembly, and finished units are function checked before packing. Export packing is a plywood case with a moisture barrier, and a 12 month warranty covers manufacturing defects. Inspection records and, on request, third party load test certificates can be supplied with the shipment.

For project specific configurations, drawings or inspection requirements, send the conductor size, rated load and destination port with your enquiry.