Quick Answer:The Pulley Block Assembly Set is a set of components for making pulley blocks in many configurations: 15 plastic pulley frames with single, double and triple sheaves, and 30 plastic plain-bearing pulleys of 25, 38 and 50 mm diameter.
Last updated: 18 October 2026
Key Features
15 plastic pulley frames: 5 each of single, double and triple sheaves.
Each frame has a removable bearing pin and a pair of hooks.
30 plain-bearing plastic pulleys, 10 each of 25, 38 and 50 mm diameter.
One set builds many pulley block configurations instead of separate pulleys.
Technical Specifications
Specification
Value
Pulley frames
15, plastic (5 single, 5 double, 5 triple sheave)
Frame fittings
Removable bearing pin and pair of hooks
Pulley wheels
30, plastic, plain bearing
Wheel diameters
10 each of 25, 38 and 50 mm
How It Is Used
Pupils fit wheels into frames to assemble pulley blocks with one, two or three sheaves, then use them to compare load, effort and mechanical advantage for different arrangements.
Frequently Asked Questions
What does the Pulley Block Assembly Set contain?
15 plastic pulley frames (5 each of single, double and triple sheaves) and 30 plastic plain-bearing pulleys, 10 each of 25, 38 and 50 mm diameter.
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