Rotork plc Datasheets for Gearboxes and Gearheads

Gearboxes and gearheads, also called gear reducers or speed reducers, are power transmission devices that use a gear arrangement in an enclosed housing to transfer energy, increase torque and reduce speed from one device to another. Gearboxes may also be referred to as gear reducers or speed reducers.
Gearboxes and Gearheads: Learn more

Product Name Notes
IW Mk2 Quarter-Turn Worm Gearbox -- IW Mk2 Range IW Mk2 Quarter-Turn Worm Gearboxes The new IW Mk2 worm gear operators have been designed to suit isolating duty motorised applications. The gearboxes include low lead angle gearing designed to...
Manual Heavy-Duty Quarter-Turn Operator -- IW Range • Torque range up to 850,000 Nm (626,890 lbf.ft). • 21 sizes. Ratios from 40:1 to 9,600:1. • Comprehensive gear ratios with a combined selection of input reducers • High...
Quarter-Turn Worm Gear Operator -- ABLX Range Cast iron quarter-turn gearboxes with integrated limit switches for remote position indication suited for fire protection. • Torque range up to 1,620 Nm (1,196 lbf.ft). • 4 sizes. Ratios from...
Motorised Heavy-Duty Quarter-Turn Gearbox -- IW Range Complete range of heavy-duty cast and ductile iron quarter-turn worm gearboxes suited for plug, ball and butterfly valves serving the water and waste water, gas, chemical, power, and general industrial...
Motorised Multi-Turn Gearbox -- IB Range Complete range of heavy-duty cast iron multi-turn bevel gearboxes suitable for the most demanding motorized applications for cast and fabricated sluice gates, gate valves and globe and pinch valves. •
Motorised Multi-Turn Gearbox -- IS Range Complete range of heavy-duty cast iron multi-turn spur gearboxes suitable for the most demanding motorized applications where the gearbox input shaft needs to be parallel with the valve stem for...
Override Quarter-Turn Gear Operator -- ILG-D Range Complete range of manual declutchable sandwich override quarter-turn gearboxes for double-acting pneumatic actuators. • Torque range up to 17,000 Nm (13,000 lbf.ft). • 9 sizes. Ratios from 35:1 to 468:1.
Dual Shaft Bevel Gear Operator -- DSB Range Complete range of multi-turn bevel gearboxes with two shafts for use with dual stem sluice gates and penstocks. • Torque range up to 8,135 Nm (6,000 lbf.ft). • Thrust range...
Override Quarter-Turn Gear Operator -- ILG-S Range Complete range of sandwich manual override quarter-turn gearboxes for spring-return pneumatic actuators. • Torque range up to 32,000 Nm (23,600 lbf.ft). • 10 sizes. Ratios from 34:1 to 729:1. •
Multi-Turn Hand Operated Bevel Gears -- HOB3 Range Designed for manual applications, the HOB3 bevel gear operators complement the existing HOB range, for use on gate valves, globe valves and penstocks. • Torque range up to 315 Nm...
Mastergear Large Bevel Gear Operator -- A & H Series For gate valves and sluice gates with rugged cast iron construction in 16 frame sizes with torques up to 619,080 in-lbs (70,000 Nm) and thrust up to 1,461,000 lbs and...
Multi-Turn Hand Operated Bevel Gear -- HOB/MPR Range Hand operated bevel gears suited for sluice gates, gate, and globe valves. • Torque range up to 8,018 Nm (5,914 lbf.ft). • Thrust range up to 1,557 kN (350,028 lbf).
Hand Operated Worm Gearbox -- HOW/MPR Hand Operated Worm Gearbox Designed to suit manual applications, the HOW/MPR worm gear operators are quarter-turn devices intended for the operation of ball, plug and butterfly valves. The HOW/MPR gear...
Heavy-duty Quarter-turn Worm Gear Operator -- AB Range Heavy-duty cast iron quarter-turn gearboxes suited for ball, plug and butterfly valves serving the water, gas, chemical, power, and demanding industrial applications. • Torque range up to 32,000 Nm (23,600...
Heavy-Duty Quarter-Turn Modulating Worm Gearbox -- MOW Range Heavy-duty quarter-turn modulating gearboxes suited for control valves. • Torque range up to 47,000 Nm (34,500 lbf.ft). • 9 sizes. Ratios from 40:1 to 3,000:1. • Up to 1,200 starts...
Mastergear Stainless Steel Bevel Gear Operators Heavy-duty stainless steel 316 housing multi-turn gearboxes suitable for the most demanding manual and motorised applications. Suitable for cast and fabricated sluice gates, gate valves, globe and pinch valves. Torque...
Stainless Steel Part-Turn Gearbox -- WG-SS Range Heavy-duty stainless steel 316 housing part-turn gearboxes suited for plug, ball and butterfly valves serving the water, gas, chemical and power industries in corrosive environments. Torque range up to 125,000...
Heavy-Duty Stainless Steel Quarter-Turn Gear Operator -- AB-SS Range Heavy-duty stainless steel 316 housing quarter-turn gearboxes suited for plug, ball and butterfly valves serving the water, gas, chemical and power industries in corrosive environments. • Torque range up to...
Light-Duty Quarter-Turn Worm Gear Operator -- 232 Range Light-duty cast aluminum quarter-turn gearboxes suited for HVAC, fire protection, and general industrial applications. • Torque range up to 1,500 Nm (1,106 lbf.ft). • 7 sizes. • Ratios from 37:1...
Quarter-Turn Worm Gear Operator -- 232LX Range Light-duty cast aluminum quarter-turn gearboxes with integrated limit switches for remote position indication suited for fire protection. • Torque range up to 500 Nm (366 lbf.ft). • 2 sizes. Ratios...
Multi-Turn Hand Operated Spur Gear -- HOS/MPR Range Multi-turn devices intended for the manual operation of gate, globe, sluice and penstock valves. For use above and underground with upward or downward input orientation. • Torque range up to...
Quarter-Turn Fire Protection Worm Gear Operator -- FB Range Quarter-turn cast iron gearbox suitable for use with fire protection (i.e. sprinkler) systems, includes limit switches to be incorporated into a supervisory electrical circuit. Designed and tested specifically to meet...
Motorised Quarter-Turn Gearbox -- ABM Range Quarter-turn devices for the motorized operation of plug, ball and butterfly valves and power and process dampers. • Torque range up to 2,000 Nm (1,475 lbf.ft). • 4 sizes. Ratios...
Quarter-Turn Worm Gear Operator -- 242 Range Robust and lightweight quarter-turn cast iron gearbox for low torque manual applications. Suitable for ball, plug and butterfly valves. • Torque range up to 2,000 Nm (1,475 lbf.ft). • 5...
Quarter-Turn Bronze Worm Gear Operator -- BR Range The BR series gear operators are manufactured from high quality cast aluminum bronze and stainless steel materials and designed for extended life operation of valves in corrosive man hole and...
Dual Speed Gear Operator -- DSIR Range The Dual Speed Input Reducer is used to reduce the number of input turns required, and therefore the operating time, on manual gearbox applications. It can be used with any...
Multi-Turn Worm Gearbox -- MTW Range The multi-turn worm gearboxes are used for applications such as sluice gates and dampers. • Torque range up to 162,000 Nm (119,000 lbf.ft). • 11 sizes. Ratios from 40:1 to...
Subsea Quarter-turn Gearbox -- WGS Range The WGS range of quarter-turn gearboxes are designed for heavy-duty subsea applications at any depth with carefully chosen materials to offer the highest level of reliability required in this very...
Manual Quarter-turn Gear Operators -- QTW150 Range Robust, rugged manual gearboxes designed for use in the water and gas pipeline markets. Torque range up to 150 Nm (111 lbf.ft). Ratio 40:1. • Output flange F05 / F07...
Quarter-turn Worm Gear Operators -- IW-AWWA (C504 and C517) Range Worm gear operators suitable for the manual actuation of AWWA C504 butterfly and C517 plug valves. Torque range up to 164,000 Nm (120,960 lbf.ft). Ratios from 48:1 to 2,374:1. •
Quarter-turn Worm Gear Operators -- AB-AWWA (C504 and C517) Range Worm gear operators suitable for the manual actuation of AWWA C504 butterfly valves and C517 plug valves. Torque range up to 2,000 Nm (1,475 lbf.ft). Ratios from 34:1 to 48:1.