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helical cut gears

Helical gears are 1 kind of cylindrical gears with slanted tooth trace. Compared to spur gears, they have the larger contact ratio and excel in quietness and much less vibration and in a position to transmit large force. A pair of helical gears gets the same helix position but the helix hand is usually opposite.

When the reference portion of the apparatus is in the standard plane, by tilting the hobbing tool, the spur gear hobbing machine and hobbing tool can be used to produce helical gears. Because of the twist of teeth, their manufacturing has the disadvantage of more difficult production.

The helical gears made by Ever-power could be classified into two groups by the reference section of the gears being in the rotating plane (transverse module) and normal plane (normal module). If the reference section is definitely in the rotating plane, the center distance is identical to spur gears as long as they will be the same module and number of teeth. This enables for easy swapping with spur gears. Nevertheless, in this case, they require special hobbing cutters and grinding stones, resulting in higher production cost. On the other hand, if the reference section is in the normal plane, you’ll be able to use spur gear hobbing tools and grinding stones. However, the same module and number of tooth in spur gears no more match the center range of helical gears, and swapping turns into very hard. In addition, the center distance is usually no integer.

While spur gears do not generate axial thrust forces, due to the twist in the tooth trace, helical gears produce axial thrust force. Consequently, it is desirable to use thrust bearings to absorb this force. Nevertheless, combining right hands and left hands helical gears making dual helical gears will remove the thrust force.
Helical gears are often used in automotive transmissions by replacing spur gears.
Helical gears have teeth that are arranged upon an angle to the apparatus axis. The features and benefits are similar to spur gears, but can be a better option when higher velocities are required. In comparison to spur gears, helical gears possess better tooth strength and a higher load carrying capacity. They also have a smoother and quieter operation because of their higher face get in touch with ratio.

Ever-power is well equipped to meet up all your helical gear requirements, whether cut or precision ground. Our manufacturing capabilities include an array of sizes of tailor made helical gears with quality levels up to AGMA Q15. Whether you need metric, diametral or other types of gears and splines, the group at Ever-power gets the knowledge and experience to produce the top quality gearing you need.

Ground Helical Gears
Using our considerable experience and our range of state-of-the-art equipment, we are able to manufacture the best quality floor helical gears anywhere. Our robotically loaded threaded and profile steering wheel gear grinders function to meet high volume needs. For smaller operates, our manually loaded profile equipment grinders are manned by our experienced staff, providing consistency across the board. We have a dedicated helical equipment design and development team, and our helical gears are produced in lean “Just with time” cells.

Diameter: 0.5” to 27.5”
Face: 12.9” Max
Pitch: 48 to 1 1.7 DP
Quality: AGMA Tolerance Q15
Cut Helical Gears
We also have an array of capabilities when it comes to cut helical gears. From high to low volume, small or huge size, we can fulfill your requirements with this automated to manually loaded equipment hobbers or shapers. Our clients know they can turn to us for top quality cut helical gears. Our processes are tried and true, and we guarantee all of our products.


Diameter: 0.5” to 72.0”
Face: 24” Max
Pitch: 120 to 1 1.5 DP
Quality: AGMA Tolerance Q10

We are also capable of slicing select internal helical gears. Please contact us with specifications for consideration.

Besides smoother motion, higher speed ability, and less noise, another benefit that helical gears provide over spur gears may be the ability to be used with either parallel or non-parallel (crossed) shafts. Helical gears with parallel shafts require the same helix angle, but opposing hands (i.electronic. right-handed teeth versus. left-handed teeth).

When crossed helical gears are used, they may be of possibly the same or reverse hands. If the gears possess the same hands, the sum of the helix angles should the same the angle between the shafts. The most common example of this are crossed helical gears with perpendicular (i.e. 90 level) shafts. Both gears possess the same hands, and the sum of their helix angles equals 90 degrees. For helical cut gears configurations with opposing hands, the difference between helix angles should equal the angle between your shafts. Crossed helical gears provide flexibility in design, but the contact between the teeth is nearer to point contact than line contact, therefore they have lower power capabilities than parallel shaft designs.

Helical gears tend to be the default choice in applications that are ideal for spur gears but have nonparallel shafts. They are also utilized in applications that require high speeds or high loading. And regardless of the load or quickness, they often provide smoother, quieter procedure than spur gears.


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    The use of original equipment manufacturer’s (OEM) part numbers or trademarks , e.g. CASE® and John Deere® are for reference purposes only and for indicating product use and compatibility. Our company and the listed replacement parts contained herein are not sponsored, approved, or manufactured by the OEM.