Ground helical gear with module 3, 40 teeth, and left-hand helix, featuring a plain bore, 80 mm hub diameter, 120 mm pitch diameter, 126 mm outside diameter, 25 mm face width, 16 mm hub width, and 41 mm total length. Made from SCM440 steel with induction-hardened tooth surfaces at 50-60 HRC. Precision grade JIS N6 (JIS B1702-1:1998) and JIS 2 (JIS B1702:1976), with 20° transverse pressure angle and 21°30' helix angle. Allowable torque is 482 N·m (49.2 kgf·m) for bending strength and 670 N·m (68.3 kgf·m) for surface durability, with backlash ranging from 0.14 to 0.24 mm and weight of 2.69 kg. Axial thrust forces are generated; secondary operations on tooth areas are prohibited due to induction hardening.
Module 3, 40 Tooth, Left Handed Ground Helical Gear with Plain Bore
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Helical gears are comparable to spur gears, but due to the higher contact ratio, they are quieter, vibrate less, and experience less friction. Helical gear pairs have the same helix angle but opposite threads (left-hand and right-hand). Helical gears can be used in place of spur gears; they can be used in drives with non-parallel axes or positioned in between parallel axes. Helical gears are suitable for applications involving faster speeds and larger loads because, unlike spur gears, their teeth are twisted along the helical path and progressively interlock into one another.
Helical gears can also be found in industries related to movable earth, power, and oil drilling. Because of their efficacy with heavy loads, they are found in elevators, conveyors, compressors, and blowers. The most popular helical gear application is in the automobile industry, specifically in transmissions.
Our inch and metric helical gears are offered in 48-pitch modules 1, 2, and 3.
They are available in stainless steel, aluminum, and ground-hardened steel with black oxide finishes.
Call us: 516-328-3300
| QTC METRIC GEARS | Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|---|
| Product Category | Gears | Gears |
| Product Number | KKHG3-40L | KKHG3-40L |
| Product Name | Commercial & Precision Helical Gears (metric) | Module 3, 40 Tooth, Left Handed Ground Helical Gear with Plain Bore |
| Gear Type | Helical | Helical; Rack |
| Number of Teeth | 40 | 40 |
| Design | Metric | |
| Pressure Angle | 20° | 20° |
| PD | 120 mm (4.72 inch) |
