Rated line pull: 25 ton (50,000 lb) on bare drum
Duty: heavy intermittent lifting/pulling (BOP handling, rig-up/rig-down)
Type: Air motor driven, gear reduction winch
Air supply: typically 90–120 psi plant air (higher pressure = more pull/line speed if motor allows)
Controls: pendant or lever control valve (forward/neutral/reverse)
Drum: grooved or smooth depending on setup
Wire rope size (common on 25-ton class): 1-1/8" to 1-1/4" IWRC (varies by drum and reeving)
Layers: rating usually first layer; pull decreases as layers build
Line speed (no load): often ~50–120 ft/min
Line speed (rated load): often ~10–30 ft/min
Primary holding brake: external contracting band brake (the “25T” brake shoe you pictured fits this system)
Brake actuation: manual or air-assisted depending on build
Load holding: designed to hold 100% of rated load (properly adjusted, dry lining/drum)
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