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| Process | Turning, Hobbing, Milling, Shaping, Broaching,Shaving, Grinding and Lapping |
| Heat treat | Quenching & Tempering, Carburizing & Quenching, High-frequency Hardening, Carbonitriding etc. |
| Finishing | Blacking, Polishing, Anodization, Chrome Plating, Zinc Plating, Nickel Plating |
| Module | 1 ∼12 |
| Features | The most common type of gear;Easy to manufacture;No axial force when running;Economic and good quality consistence. |
| Applications | General Transmission Components; Offshore Drilling |
Regular Materials and Heat Treatment | |||||
GB/JB | DIN | JIS | SAE/AISI | Case Hardening | Case Hardness |
40CrNiMo | 34CrNiMo6 | SNCM439 | 4340 | Nitriding | 46-50HRC |
20CrMo | 20CrMo44 | SCT42 | 4119/4118 | Carburizing | 42-45HRC or 55-60HRC |
20CrNiMo | -- | SNCCM220 | 8620 | Carburizing | 55-60 HRC or 58-62 HRC |
20CrMnTi | -- | -- | -- | Carburizing | 55-60 HRC |
Heat Treatment Cycle: Carburizing /Nitriding → Normalize → Quench → Clean → Temper → Shot Blast



Q:How long is your delivery time?
A:Generally it is 45-90 days because we mainly do custom parts and it is according to quantity.
Q:Do you provide samples?
A:Samples will be shipped to you first for approval before production.
Q:What is your terms of payments?
A:Payment≤1000USD,100% in advance.
Payment >1000USD,30% T/T in advance,balance before shipments.
Q:What could clients get before shipments?
A:1)Production weekly update
2)Material cert,dimension reports and plenty of photos
3)Other reports as customer's request
Q:What is your quality assurance term?
A:1 Year assurance,expect some consumption parts.
More questions or confusions,please feel free to contact us:
Email:sales at shsmm.com
Phone:86-21-35310435
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