Pre-Loaded Sheave (PLS)
This sheave design allows the rigger to apply tension to the line by adjusting the tension screw. The sheave inside is free to rotate regardless of the tension applied.
1200 Series – 12in [305mm] block with a 10in [254mm] sheave, up to 3/8in [10mm] cable/rope
rated for 600lbs [272 kg] per line with a 10:1 Safety Factor
Estimated assembled weight of single line block: 70.0 lbs [31.8 kg]
Only single-line sheaves available at this time.