Helical Ground Rack
SOTPH JIS N1 / JIS N2
Helical ground racks of the highest precision grade, suited to high-precision CNC machine tools, laser cutters, five-axis linkage equipment and other applications demanding extreme positioning accuracy and smooth running. Ground-grade tooth flanks combined with induction hardening ensure long-term, stable, high-precision transmission performance.
Precision Grade
Normal Grade N
High Grade H
Precision Grade P
Super Precision SP
Ultra Precision UP
| Item | Parameter Details |
|---|---|
| Precision Grade | JIS N1 / JIS N2(ground-grade precision) |
| Material | S45C Carbon steel / SCM440 alloy steel (optional) |
| Hardness | HRC 48-52°(induction hardened after grinding) |
| Module Range | M1.0 – M2.5 |
| Pressure Angle | 20° |
| Helix Angle | 19°31′42″(right-hand / left-hand optional) |
| Tooth Profile Standard | Involute (DIN 3967) |
| Surface Treatment | Precision ground surface, roughness Ra <= 1.6 um |
| Length Range | Standard lengths: 500, 1000, 1500, 2000 mm; any length customized on demand |
| Mounting Method | Top- and bottom-side locating holes; M4/M5/M6/M8 mounting tapped holes as standard |
| Typical Applications | Laser cutters, CNC machining centers, electronic-component manufacturing, precision measuring instruments |