Duplicate Gear

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When we intend to change the machining process to PM, we need to consider 4 questions:

 

1.     The quantity is big enough to ensure the investment of mould is reasonable, because the 

machining maybe doesn’t need to make mould;

2.     Evaluate the structure and tolerance, to prove the feasibility, then offer necessary changes;

3.     Evaluate the required physical properties, it should be in the limitation of PM process;

4.     Calculate and see if the PM process is really cost-efficient than other technologies.

 

Gennerally speaking, there are few parts which are totally meet all above 4 points, but anyhow, 

the successful decision of PM is the result of positive compromise and deeply technical conversation.

 

The main classifications of gear:

1.     Pinion gear

2.     Ring gear

3.     Duplicate gear

4.     Sprocket

5.     Pulley

6.     Worm gear

7.     Spline hub

 

They are widely used in motor, enginee, gearbox, oil pump, water pump and 

other structure of transmission.

 

Advantages of PM gear:

Few waste of the material, formed directly by only one or two times of pressing

High efficiency, stable quality level

Low material and production cost

 

Weakness of PM gear in comparison with machining gear:

Yield strength, breaking stength of the tooth

Density 7.2 g/cm³

Profile precision H6~H8

Macrohardness 25-40 HRC

Microhardness 60 HRC Max


The application of PM parts

Automobile:

Enginee parts, crankshaft timing belt pulley, water pump pulley, oil pump pulley, driving and driven gear, 

driving and driven sprocket, cam, bearing cap, rocker arm, bushing, thrust plate, valve guide, inlet and 

exhaust valve seat.

Transmission parts, gear hub and parts of various high and low speed synchronizer, clutch gear, cam 

and camshaft, sliding block, shift lever, axle sleeve, guide block, synchronous ring.

 

Motorcycle:

Driven gear and parts, sprocket, starter pawl, ratchet, star gear, duplicate gear, pinion gear, gear ring, 

variable gear, pushrod cam, shaft sleeve, sliding bearing, centring sleeve, driven disc, inlet and exhaust 

valve seat.

 

Oil pump parts:

Oil pum gear, gear hub, various rotors, inner rotor and outer rotor, gerotor, cam ring.

 

 

With productive and professional automobile car duplicate gear factory, Dewin Group Limited can supply 

you with customized service. As one of the credible manufacturers and suppliers duplicate gear of various 

types in China, we have custom products of unique design serving for you.

 


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