Helical gear teeth are on an angle. They can be made several ways. You can Hob them. You can Shape them. And you can mill them. The teeth on a helical gear are cut at an angle to the face of the gear. When two teeth start to engage, the contact is gradual, starting at one end of the tooth and maintaining contact as the gear rotates into full engagement. Typical range of the helix angle is 15 to 30 deg. The thrust load varies directly with the magnitude of the tangent of helix angle. Helical’s are the most commonly used gear in transmissions. They generate large amounts of thrust, as a result, the use of bearings, to support the thrust load, is recommended. A Helical Gear can be used to adjust the rotation angle by 90 degrees when mounted on perpendicular shafts. Its normal gear ratio range is 3:2 to 10:1.
Helicals have a larger contact ratio than spur gears. A pair of helical gears has the same helix angle but the helix direction is opposite.
If you lay the Helical Gear on the table and the teeth go up towards the right, the it is a Right handed Helical gears. And if the teeth go up towards the left, they are left handed
NextDayGears.com can make helical Gears with the helix angle of your choice if you are designing. Or we can match the helix angle on your samples or prints.
NextDayGears.com can make precision helical gears out of any material.
We specialize in .500″ in diameter to 24.00″ in diameter.
3DP TO 120DP is our pitch range.
We can also make helical gears in Metric Pitches of 8 Module to .200 Module.
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