China high quality Motor Starter Clutch Gear Bendix for Gy6 49cc 50cc 139qmb Scooter raw gear

Product Description

Products Description

Motor Starter Clutch Gear Bendix For GY6 49cc 50cc 139QMB Scooter Moped ATV

Type Starter drive bendix
Voltage 12
Rotation CCW
Teeth 14 teeth
Drive Gear 65 teeth
Outer Diameter of Bottom Gear 40mm
Fits 49cc 50cc 60cc 139QMB 139qma scooter ATV Motorcycle

Dear friend, Welcome to CZPT !

Aftermarket parts—Starter drive bendix 


BEFORE BUYING: Make sure that this product matches with the 1 you need to replace.

Year Make Model Submodel
2017 Aprilia Caponord 1200 Rally ABS
2016 Aprilia Caponord 1200 ABS
2016 Aprilia Caponord 1200 Rally ABS
2016 Aprilia Caponord 1200 Travel Pack ABS
2015 Aprilia Caponord 1200 Rally ABS
2015 Aprilia Caponord 1200 Travel Pack ABS
2014 Aprilia Caponord 1200 Travel Pack
2016 Aprilia Dorsoduro 750 ABS
2015 Aprilia Dorsoduro 750 SMV750 ABS
2014 Aprilia Dorsoduro 750 SMV750 ABS
2013 Aprilia Dorsoduro 750 SMV750 ABS
2012 Aprilia Dorsoduro 750 SMV750
2011 Aprilia Dorsoduro 750 SMV750
2571 Aprilia Dorsoduro 750 SMV750
2009 Aprilia Dorsoduro 750 SMV750
2017 Aprilia Dorsoduro 900
2014 Aprilia Dorsoduro 1200 SMV1200
2013 Aprilia Dorsoduro 1200 SMV1200
2012 Aprilia Dorsoduro 1200 SMV1200
2011 Aprilia Dorsoduro 1200 SMV1200
2007 Aprilia ETV1000 Caponord
2007 Aprilia ETV1000 Caponord ABS
2006 Aprilia ETV1000 Caponord
2005 Aprilia ETV1000 Caponord
2004 Aprilia ETV1000 Caponord
2003 Aprilia ETV1000 Caponord
2002 Aprilia ETV1000 Caponord
2001 Aprilia ETV1000 Caponord
2003 Aprilia Falco R
2003 Aprilia Haga R
2012 Aprilia MXV450
2571 Aprilia MXV450
2009 Aprilia MXV450
2015 Aprilia Mana 850 GT ABS
2014 Aprilia Mana 850 GT ABS
2013 Aprilia Mana 850 GT ABS
2012 Aprilia Mana 850
2012 Aprilia Mana 850 GT ABS
2011 Aprilia Mana 850
2011 Aprilia Mana 850 GT ABS

 Company Profile



Q: Are you trading company or manufacturer ?

A: We are a trading company who has many long-term co-operated factories who have stable quality products. Each factory specializes in different series products. Our customer can make many choices.


Q: What is your shipping method?

A: 1.Express like DHL, UPS, FEDEX, ARAMEX, EMS…

2.Sea+ to door

3.Air+ to door

4.Train+to door

5.Sea U can choose what you want.


Q: Do you provide samples ?

A: Yes, We can supply the sample if we have ready parts in stock


Q:How long will take to prepare the big order?

A: Generally, it will take 1-3working days to prepare for the items we have in stock. For the big order, we need to check your order content to make sure the production time.


Q:Can you do customization?

A:Yes, if you have sample, you can ship the sample to us, we can do the mold and produce big order for you.


Q: How to pay?

A: TT, PAYPAL, Ali Pay,Credit card, Ali Assurance…

Q: Do U have quality guarantee ?
A: Yes, we will provide 6 month guarantee




Shipping Cost:

Estimated freight per unit.

To be negotiated
After-sales Service: Yes
Warranty: 1 Year
DC Form: Pmdd
US$ 10/Piece
1 Piece(Min.Order)


Order Sample



Customized Request


Spiral Gears for Right-Angle Right-Hand Drives

Spiral gears are used in mechanical systems to transmit torque. The bevel gear is a particular type of spiral gear. It is made up of two gears that mesh with one another. Both gears are connected by a bearing. The two gears must be in mesh alignment so that the negative thrust will push them together. If axial play occurs in the bearing, the mesh will have no backlash. Moreover, the design of the spiral gear is based on geometrical tooth forms.

Equations for spiral gear

The theory of divergence requires that the pitch cone radii of the pinion and gear be skewed in different directions. This is done by increasing the slope of the convex surface of the gear’s tooth and decreasing the slope of the concave surface of the pinion’s tooth. The pinion is a ring-shaped wheel with a central bore and a plurality of transverse axes that are offset from the axis of the spiral teeth.
Spiral bevel gears have a helical tooth flank. The spiral is consistent with the cutter curve. The spiral angle b is equal to the pitch cone’s genatrix element. The mean spiral angle bm is the angle between the genatrix element and the tooth flank. The equations in Table 2 are specific for the Spread Blade and Single Side gears from Gleason.
The tooth flank equation of a logarithmic spiral bevel gear is derived using the formation mechanism of the tooth flanks. The tangential contact force and the normal pressure angle of the logarithmic spiral bevel gear were found to be about twenty degrees and 35 degrees respectively. These two types of motion equations were used to solve the problems that arise in determining the transmission stationary. While the theory of logarithmic spiral bevel gear meshing is still in its infancy, it does provide a good starting point for understanding how it works.
This geometry has many different solutions. However, the main two are defined by the root angle of the gear and pinion and the diameter of the spiral gear. The latter is a difficult one to constrain. A 3D sketch of a bevel gear tooth is used as a reference. The radii of the tooth space profile are defined by end point constraints placed on the bottom corners of the tooth space. Then, the radii of the gear tooth are determined by the angle.
The cone distance Am of a spiral gear is also known as the tooth geometry. The cone distance should correlate with the various sections of the cutter path. The cone distance range Am must be able to correlate with the pressure angle of the flanks. The base radii of a bevel gear need not be defined, but this geometry should be considered if the bevel gear does not have a hypoid offset. When developing the tooth geometry of a spiral bevel gear, the first step is to convert the terminology to pinion instead of gear.
The normal system is more convenient for manufacturing helical gears. In addition, the helical gears must be the same helix angle. The opposite hand helical gears must mesh with each other. Likewise, the profile-shifted screw gears need more complex meshing. This gear pair can be manufactured in a similar way to a spur gear. Further, the calculations for the meshing of helical gears are presented in Table 7-1.

Design of spiral bevel gears

A proposed design of spiral bevel gears utilizes a function-to-form mapping method to determine the tooth surface geometry. This solid model is then tested with a surface deviation method to determine whether it is accurate. Compared to other right-angle gear types, spiral bevel gears are more efficient and compact. CZPT Gear Company gears comply with AGMA standards. A higher quality spiral bevel gear set achieves 99% efficiency.
A geometric meshing pair based on geometric elements is proposed and analyzed for spiral bevel gears. This approach can provide high contact strength and is insensitive to shaft angle misalignment. Geometric elements of spiral bevel gears are modeled and discussed. Contact patterns are investigated, as well as the effect of misalignment on the load capacity. In addition, a prototype of the design is fabricated and rolling tests are conducted to verify its accuracy.
The three basic elements of a spiral bevel gear are the pinion-gear pair, the input and output shafts, and the auxiliary flank. The input and output shafts are in torsion, the pinion-gear pair is in torsional rigidity, and the system elasticity is small. These factors make spiral bevel gears ideal for meshing impact. To improve meshing impact, a mathematical model is developed using the tool parameters and initial machine settings.
In recent years, several advances in manufacturing technology have been made to produce high-performance spiral bevel gears. Researchers such as Ding et al. optimized the machine settings and cutter blade profiles to eliminate tooth edge contact, and the result was an accurate and large spiral bevel gear. In fact, this process is still used today for the manufacturing of spiral bevel gears. If you are interested in this technology, you should read on!
The design of spiral bevel gears is complex and intricate, requiring the skills of expert machinists. Spiral bevel gears are the state of the art for transferring power from one system to another. Although spiral bevel gears were once difficult to manufacture, they are now common and widely used in many applications. In fact, spiral bevel gears are the gold standard for right-angle power transfer.While conventional bevel gear machinery can be used to manufacture spiral bevel gears, it is very complex to produce double bevel gears. The double spiral bevel gearset is not machinable with traditional bevel gear machinery. Consequently, novel manufacturing methods have been developed. An additive manufacturing method was used to create a prototype for a double spiral bevel gearset, and the manufacture of a multi-axis CNC machine center will follow.
Spiral bevel gears are critical components of helicopters and aerospace power plants. Their durability, endurance, and meshing performance are crucial for safety. Many researchers have turned to spiral bevel gears to address these issues. One challenge is to reduce noise, improve the transmission efficiency, and increase their endurance. For this reason, spiral bevel gears can be smaller in diameter than straight bevel gears. If you are interested in spiral bevel gears, check out this article.

Limitations to geometrically obtained tooth forms

The geometrically obtained tooth forms of a spiral gear can be calculated from a nonlinear programming problem. The tooth approach Z is the linear displacement error along the contact normal. It can be calculated using the formula given in Eq. (23) with a few additional parameters. However, the result is not accurate for small loads because the signal-to-noise ratio of the strain signal is small.
Geometrically obtained tooth forms can lead to line and point contact tooth forms. However, they have their limits when the tooth bodies invade the geometrically obtained tooth form. This is called interference of tooth profiles. While this limit can be overcome by several other methods, the geometrically obtained tooth forms are limited by the mesh and strength of the teeth. They can only be used when the meshing of the gear is adequate and the relative motion is sufficient.
During the tooth profile measurement, the relative position between the gear and the LTS will constantly change. The sensor mounting surface should be parallel to the rotational axis. The actual orientation of the sensor may differ from this ideal. This may be due to geometrical tolerances of the gear shaft support and the platform. However, this effect is minimal and is not a serious problem. So, it is possible to obtain the geometrically obtained tooth forms of spiral gear without undergoing expensive experimental procedures.
The measurement process of geometrically obtained tooth forms of a spiral gear is based on an ideal involute profile generated from the optical measurements of one end of the gear. This profile is assumed to be almost perfect based on the general orientation of the LTS and the rotation axis. There are small deviations in the pitch and yaw angles. Lower and upper bounds are determined as – 10 and -10 degrees respectively.
The tooth forms of a spiral gear are derived from replacement spur toothing. However, the tooth shape of a spiral gear is still subject to various limitations. In addition to the tooth shape, the pitch diameter also affects the angular backlash. The values of these two parameters vary for each gear in a mesh. They are related by the transmission ratio. Once this is understood, it is possible to create a gear with a corresponding tooth shape.
As the length and transverse base pitch of a spiral gear are the same, the helix angle of each profile is equal. This is crucial for engagement. An imperfect base pitch results in an uneven load sharing between the gear teeth, which leads to higher than nominal loads in some teeth. This leads to amplitude modulated vibrations and noise. In addition, the boundary point of the root fillet and involute could be reduced or eliminate contact before the tip diameter.

China high quality Motor Starter Clutch Gear Bendix for Gy6 49cc 50cc 139qmb Scooter raw gearChina high quality Motor Starter Clutch Gear Bendix for Gy6 49cc 50cc 139qmb Scooter raw gear
editor by CX 2023-07-12


Wenling Minghua GEAR CO., LTD

Minghua Gear is one of leading transmission gears, planetary gearboxes, worm reducer manufacturers, suppliers and exporters of mechanical products, We offer agricultural gears, industry gears and many other gear products.

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Mail: [email protected]

We specializing in the production of gears, reducers and gearboxes, and more.

We have exported our products to clients around the world and earned a good reputation because of our superior product quality and after-sales service.

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