SUPPLY SPECIFICATION
What We Supply
Sizes, grades, mills and tolerances for our shafts range.
| Sizes | Grade families | Make / mill | Tolerance | Testing |
|---|---|---|---|---|
|
|
Forged through our partners, including ABS (Italy) and Parbhat Heavy Forge, and machined through our component partners. | Diameter, runout and machining allowance to your drawing | Mill certificate · Chemistry · Hardness · UT / runout as specified |
Processing on Shafts
OneKaizen cuts the bar to length and heat treats it in-house. Our machine-shop partners turn it to your drawing, and we inspect every shaft before it ships.
| Processing route | Typical scope | Output / control |
|---|---|---|
| Cut to length | Round bar and forged stock | Length · end condition |
| Rough machining | Shaft blanks, through our partner machine shops | Diameter · steps · allowance |
| Heat treatment | Annealed · normalised · hardened and tempered | Hardness · tensile as specified |
| Inspection | Your drawing | Dimensions · runout · certificate |
How We Make Shafts
- 1
Review the drawing
We check dimensions, steps, tolerances, grade and condition, and choose bar or forging as the starting stock.
Sourcing team - 2
Source the stock
We buy the bar or forging from the right mill or forge for your grade and diameter.
Sourcing team - 3
Cut and heat treat
Stock is cut to length and brought to the required condition.
In-house - 4
Machine
Turning to your drawing dimensions, with the allowance you specify for finishing.
Partner machine shop - 5
Inspect
Dimensions, runout, hardness and certificate check. UT as specified.
Quality team - 6
Pack and deliver
Shafts are protected, tagged with the heat number and shipped to your plant.
Supply chain team
Grades We Supply in Shafts
OneKaizen's main shaft grades by family, with their nearest equivalents. Send us any other grade on your drawing.
| Family | Grades |
|---|---|
| Carbon Steel | EN8 / SAE 1045SAE 1045 / 1.1191 |
| Free-Cutting Steel | SAE 1144 / 1.0762 |
| Case-Hardening Steel | SAE 8620 / 20NiCrMo2-216MnCr5 / 1.713120MnCr5 / 1.714718CrNiMo7-6 / 1.6587EN353EN36 / 1.5752EN39BEN362 / SAE 8620 + 11 more |
| Through-Hardening Alloy Steel | EN19 / SAE 4140EN24 / SAE 4340SAE 4130SAE 4145EN18 / SAE 5140EN16EN30BEN19A / 42CrMo4 + 23 more |
Quality, Packing and Delivery
Quality
Mill certificate with chemistry and hardness, heat-number traceability, and dimensional and runout inspection against your drawing. UT as specified.
Packing
Shafts are oiled or VCI-wrapped, separated to prevent damage to journals, and tagged with grade, size and heat number.
Delivery
To your plant anywhere in India by road. Export packing and documents for buyers abroad.
Applications
Shafts Questions
Can you make shafts from my drawing?
Yes. Send the drawing, grade and quantity and we quote to it. Our partner machine shops turn the shaft and we inspect it before dispatch.
What sizes of shafts do you supply?
Diameters from Ø 25 to 500 mm and lengths from 300 to 6,000 mm. Rolled stock covers up to Ø 350 mm and forged stock up to Ø 500 mm.
Which grade is best for a shaft, EN8 or EN24?
EN8 suits moderately loaded shafts and is the cheaper option. EN24 gives higher strength and toughness for heavily loaded shafts, and it through-hardens at larger diameters.
Can you supply shafts case-hardened for gears and splines?
Yes. OneKaizen supplies shafts in 20MnCr5, 16MnCr5 and SAE 8620, ready for carburising. Tell us the case depth and surface hardness you need.
Do you machine shafts in-house?
No. OneKaizen machines through our partner machine shops. We cut to length and heat treat in-house, and our quality team inspects every shaft.
Can I order plain bar instead of a finished shaft?
Yes. OneKaizen supplies round and bright bars cut to length if you machine the shaft yourself. Tell us whether you need bar stock or a finished shaft.
Do shafts come with test certificates?
Yes. Every shaft ships with a mill certificate traceable to the heat number, with hardness and runout reports as specified.
Do you supply shafts across India and for export?
Yes. OneKaizen delivers to plants across India and exports to buyers abroad with export packing and documents.
Sizes, grades and tolerances above are our standard range. Other sizes and grades are available on request. Final values are confirmed against your drawing and the mill certificate.
