Material Specifications for NSK Ball Screws
| Application | Heat Treating Process | JIS Material Code | U.S. Material Code | Surface Hardness |
| Carbon Steel Ball Screws | ||||
|
Carburizing |
SCM 415H/SCM 420H |
SAE 4115/4120 |
RC 58-62 |
| Custom B/S Shafts |
|
|
SAE 4115/4120 |
RC 58-62 |
| Std. Series B/S Shafts | Induction |
SAE 4150 |
|
RC 58-62 |
| F/R Produced Shafts | Induction | SAE 4150 | SAE 4150 | RC 58-62 |
| Rolling Elements (Balls) | Thru Hardened |
SUJ2 |
52100 |
RC 60-64 |
| Stainless Ball Screws Custom & Std. Series (K/A) | ||||
| Stainless B/S Nuts |
Furnace/ Quench |
SUS 440C | SAE 440C | RC 55-60 |
| Stainless B/S Shafts |
Induction |
SUS 440C | SAE 440C | RC 55-60 |
| Rolling Elements for Stainless Screws |
Thru Hardened |
SUS 440C | SAE 440C | RC 58-62 |
Abbreviations
- JIS Japanese Industrial
- Standards
- SAE - Society of Automotive Engineers
Material Descriptions
- SCM415H, 420H (SAE4115): Low carbon chrome molybdenum steel used for carburizing heat treat process.
- SUJ2 (52100): Bearing steel features high hardness, toughness and resilience.
- SUS440C (SAE440C): Martensitic stainless (hardenable). Has the high hardness that anti-friction bearing applications require, but less corrosion resistance than austenitic stainless steels (300 Series).
