Forged Flange Hubs
Forged steel flange hubs with a raised pilot boss, produced closed-die and finish-machined to suit the mating shaft.
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Forging Parts
Forged Spindle & Drive Shafts
Forged steel spindles and drive shafts, stepped and finish-turned with bearing journals, shoulders and threads.
| Forging weight | 0.5 – 25 kg per part, per die set |
|---|---|
| Tolerance | ±1.5 mm as-forged; finished to ±0.05 mm after machining |
| Heat treatment | Quench and temper, normalising or annealing — to specification |
About this part
What it is and why it is made that way
Spindles and drive shafts carry the highest cyclic loads in a machine, which is why they are forged rather than machined from bar. The stepped diameters, bearing journals and threads are turned in the same setup so the runout stays controlled — and for a spindle, runout is the whole specification.
- Forged body with controlled internal grain flow
- Stepped diameters turned in one setup for concentricity
- Bearing journals ground where the drawing requires it
- Static and dynamic balancing to G2.5 or better on request
Materials
- C45 / 40Cr carbon steel
- 42CrMo alloy steel
- 20CrMnTi / 20CrMnMo gear steel
- Stainless 304 / 17-4PH
- Alloy steel 40CrNiMoA
Production processes
- Open-die forging
- Closed-die forging
- Hot and cold forging
- Heat treatment
- CNC finish machining
Typical applications
- Machine tool spindles
- Drive shafts
- Pump and compressor shafts
- Roller and conveyor shafts
Specification
Technical detail
The ranges below are what this shop typically holds. Anything tighter than the baseline is possible — send the drawing and we will confirm it against your specific tolerances rather than quote from a table.
| Forging weight | 0.5 – 25 kg per part, per die set |
|---|---|
| Tolerance | ±1.5 mm as-forged; finished to ±0.05 mm after machining |
| Heat treatment | Quench and temper, normalising or annealing — to specification |
| Material certification | Mill test certificate available on request |
| Forging ratio | Up to 4:1, per die set |
| Shaft diameter | Up to Ø250 mm at the journals |
| Concentricity | ≤0.015 mm between adjacent journals |
| Runout | ≤0.01 mm TIR on the ground journal |
Material and finish are yours to choose. The lists above are the families this part is normally made in. We will not substitute a grade or change a tolerance without telling you first — and asking.
In the same process line
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If this is not quite your part, these are made on the same equipment with the same inspection.
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Forged flanges with a dense bolt-hole circle, machined and faced for high-pressure bolted connections.
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Get a quote for this part
Send the drawing and we will quote it against your material, your tolerance and your quantity. One business day, in writing, with a lead time you can plan around.