Screw gears, also sometimes called crossed helical gears, are helical gears used in motion transmission between non-intersecting shafts. Helical gears have point contacts, lower efficiency than parallel or perpendicular shaft gears, and cannot transmit heavy loads. The helical gears in parallel beams have the same helix angle but opposite directions. An arbitrary helix angle can be chosen for shaft angles other than the parallel. Assuming no profile shift, the intersecting angle of the shafts is the sum of the respective helix angles.
Screw Gears: Technical Information
HZPT stock screw gears come in modules 1 ~ 4, 10 to 30 teeth, and 4 materials: S45C, SUS303, CAC702 (formerly A BC2), and MC nylon.
| Catalog No. | Module | Material | Heat Treatment |
Tooth Surface Finish |
Precision JIS B 1702-1: 1998 |
Secondary Operations |
Features |
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Selection HintsPlease select the most suitable products by carefully considering the characteristics of the items and the contents of the product tables. Before the final selection, reading all applicable “CAUTION” notes is essential. Since screw gears come in the right- or left-hand helix, include the letter “R” or “L” in the catalog number when you order. 1. Caution in Selecting the Mating Gears
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