Forged Step Shafts
Stepped shafts gear shafts and spline gear shafts forged in alloy steel
What Forged Step Shafts Is and Who It Is For
Forged step shafts carry the drive load in kilns, mills, gearboxes and wind turbines. Forging the steps rather than turning them from a single large diameter keeps the grain flow running along the shaft and cuts the amount of material the lathe has to remove. Tianhao supplies forged steel shafts, gear shafts and spline gear shafts, and can deliver them forged, normalised, rough machined, quenched or tempered.
Key Benefits
- Grain flow follows the steps instead of being cut through them
- Less turning stock than a shaft machined from one diameter
- Delivery condition chosen by you, from as forged through to finish machined
- Alloy grades proven in kiln, mill and turbine service
| Delivery conditions | forged, normalised, rough machined, quenched, tempered |
|---|---|
| Wind power grades | 4140, 4340, S355NL, S420NL, 42CrMo4, 18CrNiMo7-6, 30CrNiMo8, 34CrNiMo6, A350-LF6, 1552 |
| Alloy steels | 4140, 4150, 4330, 4330V, 4340, 1045, 1080 |
| Machining | 5-axis CNC machining centre for big components |
Who It Is For
- Rotary equipment builders and cement plant suppliers
- Gearbox manufacturers
- Wind turbine component suppliers
- Mill maintenance departments buying replacement shafts
Problems It Solves
- Turning a stepped shaft from full diameter wastes most of the bar
- Welded-on collars fail at the weld under reversing torque
- Long lead times when forging, heat treatment and machining sit at three suppliers
Technical Features
- Delivery condition: forged, normalised, rough machined, quenched, tempered
- Spline and gear features machined on the CNC centre
- Large shaft capacity
- Alloy grades for axial and radial load
Where Forged Step Shafts Is Used
Drive shafts for rotary kilns and mills
Drive shafts for rotary kilns and mills
Gear shafts and spline gear shafts in heavy gearboxes
Gear shafts and spline gear shafts in heavy gearboxes
Main shafts for wind turbines
Main shafts for wind turbines
Shafts and pinions in pulp and paper equipment
Shafts and pinions in pulp and paper equipment
Materials
- 4140
- 4340
- 42CrMo4
- 34CrNiMo6
- S355NL
- S420NL
Quality Control
- Dimensional inspection after each heat treatment stage
- Testing supplied with the value added service package
- Certificates for material and heat treatment condition
Customization Options
- Step geometry and length to drawing
- Delivery condition from as forged to finish machined
- Splines, keyways and thread features machined in house
How We Make It
Drawing
Drawing and load review
Open die forging of the
Open die forging of the stepped blank
Normalising or quench
Normalising or quench and temper
Rough machining
Finish machining
Finish machining and spline cutting
Inspection
Inspection and testing
How It Compares
A forged step shaft costs more per kilo than bar stock but uses far fewer kilos and machining hours, and it holds up better in reversing duty than a shaft turned from one diameter.
Use Guide
- Mark the journals that must be finish ground and leave us the rest
- State the delivery condition you want so heat treatment is scheduled correctly
- Send the load case if you want a grade recommendation
Often Ordered Together
Machined Shafts and Rollers
Finish machined shafts and rollers delivered ready to fit
View details
Wind Power Main Shafts
Forged main shafts couplings and bearing blanks for turbine drivetrains
View details
Gears and Pinions
Forged gear and pinion blanks in 42CrMo4 and case hardening alloys
View detailsWhere To Read More
Questions Buyers Ask About Forged Step Shafts
In which condition can shafts be delivered?
Forged, normalised, rough machined, quenched or tempered, as specified on the order.
Do you cut splines and gear teeth?
Yes, spline gear shafts are part of the programme and machining is done in house.
Which grades are common for wind turbine shafts?
4140, 4340, 42CrMo4, 34CrNiMo6, 30CrNiMo8 and 18CrNiMo7-6 among others.
Get a Quote for Forged Step Shafts
Send the drawing, the quantity and the delivery condition you need. We reply with price, lead time and a sample plan.