Planetary Gear Manufacturer in Türkiye
We manufacture complete planetary gear sets – sun gear, planet gears and internal ring gear – as well as individual replacement gears for planetary gearboxes, slewing drives and wheel hubs.
- Ø1,600 mmmax. ring gear
- Module 16internal teeth
- Setssun, planets, ring
- Groundsun and planets
- 3.1certificates
Maximum Torque in a Compact, Coaxial Package
A planetary stage splits the load between three or more planet gears running between a central sun gear and an internal ring gear. That load sharing gives planetary gearboxes the highest torque density of any common gear layout, with input and output on the same axis.
Nika Gears manufactures all three members: external sun and planet gears, hobbed or shaped and ground, and internal ring gears shaped on our gear shapers. Planet gears are produced in matched groups so the load is shared evenly.
At a glance
- Sun gearsexternal, often on shaft
- Planet gears3 or more, matched
- Ring gearsinternal, shaped
- Ring gear moduleup to 16
- Materials18CrNiMo7-6, 42CrMo4
- Hardeningcase, nitriding, induction
- Supplycomplete sets
Sun, Planet and Ring Gears
Sun Gears and Sun Shafts
The central driving gear – often cut integral with the input shaft and splined for the motor or previous stage.
- Case hardened and ground
- Splined or keyed connection
- Integral shaft on request
Planet Gears in Matched Groups
Planets carry the load in parallel, so tooth thickness and bore must match closely within each set.
- Tooth thickness matched per set
- Bores for needle or roller bearings
- Hardened and ground
Internal Ring Gears
Internal gears cut on gear shapers, with bolt-hole flanges or external splines as drawn.
- Gear shaping, internal teeth
- Nitrided or induction hardened
- Flange or housing design
Planetary Gear Specifications: What Can We Make?
| Parameter | Range |
|---|---|
| Ring gear diameter | up to Ø1,600 mm |
| Ring gear module | up to 16 |
| Sun and planet gears | up to Ø1,800 mm external, module 30 |
| Accuracy | ground sun and planets to DIN 3962 grade 5–6 |
| Materials | 18CrNiMo7-6, 20MnCr5, 42CrMo4, 34CrNiMo6, 31CrMoV9 for nitriding |
| Heat treatment | case hardening, nitriding, induction hardening |
| Matching | planet tooth thickness and bores per set |
| Documents | 3.1 certificates, gear measurement, hardness reports |
Ranges are typical. Send your drawing and we confirm feasibility for your exact part.
Planet and Sun Gears in Production
Why Replace Planetary Sets Together?
In a worn planetary stage, all members have run against each other. Fitting a new sun gear between worn planets, or new planets in a worn ring gear, concentrates load on the newest parts and shortens their life.
We manufacture sun, planets and ring gear together, match the planets and inspect the set as one assembly. Where only one member is damaged, we measure the remaining parts and advise.
- Planets matched within each set
- Mesh checked before shipment
- Sets packed and labelled together
Where Are Planetary Gears Used?
Industries that use our planetary gears: construction machinery · power generation · recycling and wastewater · mining
Questions About Planetary Gears
Can you make the internal ring gear?
Yes. Ring gears are shaped up to Ø1,600 mm and module 16. See internal and ring gears.
Do you supply complete planetary sets?
Yes – sun gear, planet gears and ring gear, matched and inspected together.
Can you copy a planetary set from a sample?
Yes. We measure sun, planets and ring gear, prepare drawings for approval and manufacture a new set.
Do you make the planet carrier?
We manufacture the gears and shafts. Carriers and housings can be produced with our sister company Nika Steelworks.
Planetary Gear Sets: How They Work and How We Make Them
A planetary – or epicyclic – gear stage consists of a central sun gear, several planet gears on a carrier, and an internal ring gear around them. Holding one member and driving another gives a reduction, and because three or more planets share the load, a planetary stage carries far more torque than a parallel-shaft stage of the same size.
Sun gears
The sun gear is the most heavily loaded member: it meshes with every planet. It is usually made from a case-hardening steel such as 18CrNiMo7-6, carburised, hardened and ground. Many sun gears are cut directly on the input shaft with a spline for the motor – see splined shafts.
Planet gears
Planets run on needle or roller bearings in their bores. For even load sharing, every planet in a set must have the same tooth thickness and the same bore position. We grind and measure planets as a group and supply them as a matched set.
Ring gears
The internal ring gear is shaped on a gear shaper, because a hob cannot cut internal teeth. Ring gears are often nitrided or induction hardened, because distortion from case hardening is difficult to correct on internal teeth. See internal and ring gears for more.
Applications
Planetary gearboxes drive slewing rings on cranes and excavators, wheel hubs on mobile machinery, mixers and extruders, wind turbine pitch and yaw drives, and winches. In all of them, a compact, coaxial, high-torque stage is the reason to choose planetary gearing.
As a planetary gear manufacturer in Türkiye, Nika Gears supplies complete sets and individual replacement gears with EN 10204 3.1 certificates and inspection reports. Send your drawing or sample.
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.