Gears for Marine and Deck Machinery
Winches, windlasses, cranes, thrusters and steering gear work in salt air and must not fail at sea. We manufacture marine gears, worm sets and shafts to drawing with full material traceability.
Salt, Shock and No Second Chance
At sea, a failed winch or steering gear can be a safety issue, not just a repair. Marine gears must handle shock loads from waves and mooring lines, resist corrosion and come with documentation that satisfies owners, yards and classification societies.
Nika Gears manufactures gears, worm gear sets, pinion shafts and splined shafts for deck machinery, propulsion auxiliaries and shipyard equipment, with EN 10204 3.1 certificates traced to every part.
Typical requirements
- Loadshock, intermittent
- Environmentsalt air, humidity
- Typical gearsspur, worm, planetary
- Materials18CrNiMo7-6, 42CrMo4, bronze
- Documents3.1 certificates
- Supplyyards and owners
Where Do Our Gears Run on Ships and Offshore?
Winches and Windlasses
Spur gears, pinion shafts and drum drive gears for mooring winches, anchor windlasses and capstans.
- Shock-resistant steels
- Large spur gears
Deck and Provision Cranes
Slewing pinions, planetary hoist gears and worm drives for shipboard and offshore cranes.
- Planetary hoist stages
- Slewing pinions
Thrusters and Steering Gear
Bevel gear sets for tunnel and azimuth thrusters, and gears for steering gear and rudder actuators.
- Matched bevel sets
- Bronze worm wheels
Which Materials for Marine Gears?
| Application | Typical choice |
|---|---|
| Winch and windlass gears | 42CrMo4 Q+T or induction hardened; 18CrNiMo7-6 for highly loaded stages |
| Thruster bevel sets | 18CrNiMo7-6 or 17CrNiMo6 case hardened |
| Worm wheels | CuSn12Ni2 or CuAl10Fe5Ni5 bronze for seawater resistance |
| Shafts | 34CrNiMo6 Q+T; corrosion protection to drawing |
Final material and heat treatment follow your drawing. We advise when the specification is open.
Related industries: construction machinery · power generation · food and beverage · all industries
Marine Gear Questions
Can you supply documentation for classification societies?
We supply EN 10204 3.1 certificates and inspection reports as standard. Where a class surveyor must witness tests, please state this in the RFQ so it can be planned.
Which bronze do you use for marine worm wheels?
Typically CuSn12Ni2 or aluminium bronze CuAl10Fe5Ni5, which resists seawater corrosion well.
Do you make thruster bevel gear sets?
Yes, as matched gear and pinion sets made to drawing or from samples.
Marine Gears: Reliability in a Corrosive Environment
Marine machinery operates where repair is difficult and failure can be dangerous. Gears on deck and below must cope with shock loads from waves and lines, long idle periods, salt-laden air and, in some cases, direct seawater contact.
Deck machinery
Mooring winches, anchor windlasses and capstans use large spur gears and pinion shafts to multiply motor torque. They see sudden peaks when a line snaps taut or an anchor breaks out. Tough, through-hardened or induction-hardened gears are the usual choice.
Cranes and hatch drives
Shipboard and offshore cranes use planetary hoist gearboxes and slewing pinions; hatch covers and ramps often use worm drives for their self-locking behaviour. Bronze worm wheels in aluminium bronze resist the marine environment well.
Thrusters and propulsion
Tunnel and azimuth thrusters turn the drive through 90° with bevel gear sets; propulsion gearboxes on larger vessels use double helical gears. These are precision, case-hardened parts supplied as matched sets.
Documentation
Shipyards and owners expect traceability. Every Nika Gears order includes EN 10204 3.1 certificates and agreed inspection reports – see quality. Send your drawing for marine gears manufactured in Türkiye.
Send a gear drawing. Get an answer within 24 hours.
Include the PDF or STEP file, module or DP, number of teeth, material, heat treatment, accuracy grade and quantity. We reply with questions or a quotation.