Transmission Shafts for Gearboxes and Machines
We manufacture stepped transmission shafts for gearboxes and machinery – CNC turned, splined or keyed, hardened and ground.
- Ø800 mmmax. turning diameter
- 3,000 mmmax. length
- Groundbearing seats
- Splinedkeyed, threaded
- 3.1certificates
The Shafts That Carry the Gears
Transmission shafts carry gears, bearings and couplings and transmit torque between them. Their accuracy decides how well the gears mesh: bearing seats must be round, concentric and to size, shoulders square, and keyways and splines correctly positioned.
Nika Gears turns transmission shafts from bar or forgings, cuts splines and keyways, hardens them where required and grinds the bearing seats – the same care we apply to the gears themselves.
At a glance
- Featuresseats, splines, keyways, threads
- Materials42CrMo4, 34CrNiMo6, C45
- Hardeninginduction, Q+T, case
- Grindingbearing seats
- Quantities1 pc to series
Transmission Shaft Types
Gearbox Input and Output Shafts
Stepped shafts with bearing seats, splines and keyways for gearbox stages.
- Ground bearing seats
- Splines to DIN 5480
- Keyways to DIN 6885
Long Stepped Shafts
Long shafts for conveyors, mills and machinery, turned between centres for straightness.
- Turned between centres
- Straightness checked
- Centre holes to DIN 332
Shafts Checked Against Drawing
Every dimension that matters for assembly is measured against the customer drawing before release.
- Diameters and runout
- Keyway position
- Dimensional report
Transmission Shaft Specifications: What Can We Make?
| Parameter | Range |
|---|---|
| Diameter | up to Ø800 mm |
| Length | up to 3,000 mm |
| Tolerances | IT6 on ground bearing seats, to drawing |
| Features | splines, keyways, threads, cross holes, centre holes |
| Materials | 42CrMo4, 34CrNiMo6, C45, 16MnCr5, 18CrNiMo7-6 |
| Heat treatment | quench and temper, induction hardening, case hardening |
| Surface | ground seats, roughness to drawing |
| Documents | 3.1 certificates, dimensional and hardness reports |
Ranges are typical. Send your drawing and we confirm feasibility for your exact part.
Why Do Bearing Seats Decide Gear Life?
A gear can only run as true as the shaft it sits on. Runout of a bearing seat tilts the gear, shifts the tooth contact to one end and raises noise and wear. That is why we grind bearing seats after heat treatment and measure runout relative to the shaft axis.
For shafts with integral teeth, see pinion shafts; for splined connections, see splined shafts.
- Seats ground after hardening
- Runout measured
- Shoulders square to axis
Where Do Our Shafts Run?
Industries that use our transmission shafts: industrial machinery · steel and metal · chemical · food and beverage
Questions About Transmission Shafts
What size shafts can you make?
Up to Ø800 mm diameter and 3,000 mm length, depending on the shape.
Do you grind bearing seats?
Yes, after heat treatment, to the tolerance and roughness on the drawing.
Can you add splines and gear teeth?
Yes – see splined shafts and pinion shafts.
Do you supply shafts without gears?
Yes. We manufacture transmission shafts as stand-alone parts or together with their gears.
Transmission Shafts: Getting the Details Right
Transmission shafts look simple – a stepped cylinder – but they carry the full torque of a drive and position every gear and bearing on it. Small errors in concentricity, shoulder squareness or keyway position show up later as noise, uneven tooth contact and premature bearing failure.
Material choice
For general gearbox shafts, quenched and tempered 42CrMo4 or 34CrNiMo6 offers a good balance of strength and toughness. Where seats or splines need wear resistance, they are induction hardened. Highly loaded shafts with integral teeth are often made from case-hardening steels – see pinion shafts.
Turning and machining
Shafts are turned between centres on CNC and universal lathes. Keyways are milled or slotted, splines are hobbed, and cross holes and threads are machined to drawing.
Grinding and inspection
After heat treatment, bearing seats are ground to their final tolerance. We measure diameters, runout, keyway width and position, and spline fit, and report the results with EN 10204 3.1 material certificates.
Shafts and gears together
Because Nika Gears manufactures both gears and shafts, we can supply a gearbox shaft with its gears fitted, or matched sets of shafts and gears ready for assembly. See gearbox components. For welded housings and large machined frames, our sister company Nika Steelworks completes the package.
Send your drawing for a quotation on transmission shafts from 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.