JR Clancy Tension Floor Blocks
- Used as the return pulley for the hand line in J-Guide or T-bar manual counterweight sets
- Minimum 40 lb. (18.14 kg) weight to properly tension the hand line
- Kick tab permits easy readjustment of the block
- ASTM Class 30 grey iron sheave
- Sealed precision ball bearings
- Steel shoes
- Special grooves and shoe sizes available, consult factory
- Also known as “Welch” tension blocks, after the J. R. Clancy employee who developed the block in 1925
