Sitting and Hanging Dual Use Stringing Block 5-20KN Rated Load with 80x50mm Sheave for Conductor Stringing

Sitting and Hanging Type Dual Use Stringing Block

Site conditions change from tower to tower: sometimes the block sits on a crossarm, sometimes it has to hang from a member above. Carrying two block types for that is unnecessary. This dual use block has both a bolt-down base and a top lifting eye, so the same unit covers both mounting arrangements.

Design Features and Field Benefits

• Two Mounting Methods on One Frame: A bolt-down base handles crossarm sitting work and a top lifting eye handles suspended pulls, removing the need to stock and transport separate blocks.
• Covers 5KN to 20KN: Four sheave sizes span light distribution work up to 20KN conductor pulls, so one product family covers most of a distribution crew's needs.
• Nylon Version Saves Weight: The nylon sheave versions weigh as little as 1.4KG, which matters when a lineman carries tools up a pole.
• Precision Groove Protects the Conductor: The machined groove cradles the conductor without pinching, reducing abrasion and keeping OPGW and aluminium surfaces intact.

Dual use block models

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

Product Overview

The frame accepts a bolt-down base for sitting work and a top eye for suspension, and the sheave runs on sealed bearings for low rolling resistance. Four sheave sizes from 80x50mm to 120x58mm cover light distribution conductors through to 20KN pulls, in aluminium or nylon.

Typical Applications

• Crossarm sitting work on distribution lines
• Suspended pulls from tower members
• Maintenance and emergency restoration
• OPGW and communication cable installation

Selection Guidance

• Choose the sheave width to suit the conductor diameter and the load to suit the pull tension.
• Use the bolt-down base on timber or steel crossarms and the top eye where a suspension point is available.
• For repeated work on one conductor size, order the matching sheave and keep it as a dedicated unit.

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.

Frequently Asked Questions

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