· The Spur Gear Advantage
· Spur gears, also referred to as directly cut gears, have a number of advantages over other styles of gears. Spur gears are easy to design and produce and are also more efficient than helical gears. Straight cut gears provide increased effectiveness because helical gears generate more heat because of the fact that they have sliding contacts between teeth which generates axial thrust. When applications need simple, simple to assemble gears, spur gears may be the ideal gear for you personally. Spur gears are also known for their reliability and constant velocity ratio.
· Spur gears can be found in the following sizes / capacities:
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Optimum Pitch Diameter / Max 30.0″
Diametral Pitch / From 3.0 to 180 degrees
Face Width / Max 13.0″
Cut Tooth / AGMA Q11
Available Spur Gear Materials
· Steel
· Tool steel
· Heat-treated steel
· Brass
· Bronze
· Copper
· Cast iron
· Fiber
· Plastic

· Spur gears certainly are a very common type of gear and in many cases they will be the most price effective type of gearing. They generally have straight the teeth and transmit motion & power between parallel shafts. Spur gears are used in many products & industries including: Electronics, Building equipment, Machine equipment, Conveyors and Materials handling. They are usually not used in auto applications because they may be noisy.
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Spur gears or straight-cut gears are the simplest type of gear. They contain a cylinder or disk with teeth projecting radially. Although teeth are not straight-sided (but generally of special type to achieve a constant drive ratio, generally involute but less typically cycloidal ), the edge of every tooth is straight and aligned parallel to the axis of rotation. These gears mesh together correctly only if suited to parallel shafts.[ No axial thrust is created by the tooth loads. Spur gears are great at moderate speeds but tend to end up being noisy at high speeds.
Spur gears are the most easily visualized common gears that transmit motion between two parallel shafts. Because of their shape, they are classified as a kind of cylindrical gears. Since the tooth areas of the gears are parallel to the axes of the mounted shafts, there is absolutely no thrust force generated in the axial direction. Also, due to the simple production, these gears could be made to a high degree of precision. On the other hand, spur gears have a disadvantage in that they easily make noise. In most cases, when two spur gears are in mesh, the apparatus with more the teeth is named the “gear” and the main one with the smaller number of teeth is called the “pinion”.
As one of the the majority of professional spur gear manufacturers and suppliers in China, we warmly welcome you to get or wholesale bulk spur gear made in China here from our factory.
Spur gear teeth are manufactured by either involute profile or cycloidal profile. Most of the gears are manufactured by involute profile with 20° pressure angle. When two gears are in mesh at one immediate there is a opportunity to mate involute portion with non-involute portion of mating gear. This phenomenon is called “interference” and occurs when the amount of teeth on small of the two meshing gears is significantly less than a required minimum. In order to avoid interference we can have undercutting , but this is simply not a suitable answer as undercutting prospects to weakening of tooth at its base. In this situation Corrected gears are used. In corrected gears Cutter rack is certainly shifted upwards or downwards.
Spur gears are the most easily visualized common gears that transmit movement between two parallel shafts. Because of the shape, they are categorized as a type of cylindrical gears. Since the tooth surfaces of the gears are parallel to the axes of the installed shafts, there is absolutely no thrust force produced in the axial direction. Also, because of the simple production, these gears could be made to a high degree of precision. However, spur gears have a disadvantage for the reason that they quickly make noise. Generally speaking, when two spur gears are in mesh, the apparatus with more tooth is called the “equipment” and the one with the smaller number of teeth is named the “pinion”.
The unit to indicate the sizes of spur gears is commonly stated, as specified by ISO, to be “module”. In recent years, it is typical to create the pressure angle to 20 degrees. In commercial machinery, it really is most common to use a portion of an involute curve as the tooth profile.
Even though not really limited to spur gears, profile shifted gears are used when it is required to adjust the center distance slightly or to strengthen the equipment teeth. They are made by adjusting the distance between your gear cutting tool called the hobbing tool and the apparatus in the production stage. When the change is definitely positive, the bending strength of the apparatus increases, while a negative shift slightly reduces the guts distance. The backlash is the play between the tooth when two gears are meshed and is needed for the simple rotation of gears. When the backlash can be too large, it leads to improved vibration and noise while the backlash that’s too little leads to tooth failure due to the lack of lubrication.
All Ever-power spur gears possess an involute tooth shape. Basically, they are involute gears using part of the involute curve as their tooth forms. Looking generally, the involute shape may be the most wide-spread equipment tooth form because of, among other factors, the ability to absorb small center distance errors, easily made production equipment simplify manufacturing, heavy roots of one’s teeth make it solid, etc. Tooth form is often described as a specification in drawing of a spur gear as indicated by the elevation of teeth. In addition to standard full depth teeth, extended addendum and stub tooth profiles can be found.
Ever-power’s spur gears, which are made to transmit movement and power between parallel shafts, will be the most economical gears in the power transmission industry.
We offer both 14 1/2° and 20° PA (pressure angle), involute, and full-depth system gears. 20° PA is normally recognized as having an increased load carrying capacity; however, 14 1/2° PA gears are utilized extensively aswell. This is because the lower pressure position reduces modify in backlash because of center distance variation and concentricity errors. The 14 1/2° PA also offers a higher contact ratio for smoother, quieter operation.
Ever-power spur gears can be found through our Guaranteed Same Day Shipment from the world class manufacturing center in Hangzhou, China. Many different gears with a number of bore sizes, keyways, and setscrews are routinely in stock, if the particular bore/keyway/setscrew mixture needed is not easily available, our machining experts can transform any non-hardened gear and deliver it within 24 hours. Just ask!
We offer all types of spur gears including ground spur gears, metric spur gear, hubless spur hears, fairloc spur gears, plastic-type spur gears, metal spur gears, injection molded spur gears.
· Transmits motion and power efficiently between parallel shafts.
· Our 20° PA spur gear has a high load-carrying convenience of enhanced performance.
· The 14 1/2° PA spur gear provides smooth, quiet operation.
· Spur gears are manufactured in Delrin, non-metallic, brass, metal, and cast iron materials for maximum versatility.
· Non-metallic (phenolic – grade C) materials provides peaceful, corrosion resistant operation.
· Custom Spur Gears
· Ever-power customized spur gears & internal spur gears in a number of designs and sizes. We focus on spur gears & gear drives that can meet exacting specs and tolerances. You can expect regular & metric sizes, and can make spur gears in a number of materials. Special designs can be found. Following AGMA specifications, Avon frequently exceeds these criteria to support the intricacies of high precision gears. No specification, no detail is too complex for Avon.
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