Spur gear

PRMdrive spur gears are made to order. In our advanced manufacturing facility, we custom manufacture a wide range of spur gears with hobbing and grinding to meet your precision requirement, We can manufacture spur gear up to 2500mm with gear grinding that the accuracy of tooth surface can reach Ra0.8.

The large module gear hobbing machine introduced from Russia can ensure our efficient mass production of spur gear and gear shaft, we have the absolute advantage to provide high quality, fast delivery and reasonable price of spur gear and gear shaft.

We also design and manufacture a number of gear styles including internal gears and gear rack. We can produce gears with cast iron, carbon steel and alloy steel by nitriding, induction hardening or carburizing to meet your technical requirement.

Spur gears are the simplest type of gear. They consist of a cylinder or disk with teeth projecting radially. Spur gears are used to transmit power and rotary motion between parallel shafts. The teeth are cut parallel to the axis of the shaft on which the gears are mounted. Since they are relatively simple in design and manufacture they are used for a wide array of applications.

PRM drive is highly experienced as a spur gears suppliers for OEMs in China. Here below you can see the capacity and material we supply for spur gears.

Quick   details

Standard or Non-standard Non-standard
Module 1-40
Shape external
Diameter with tooth grinding max 2500mm
w/o tooth grinding max 8000mm
Tooth profile spur
Material Carbon steel, alloy steel
Processing forging, heat treatment, machining
Pressure angle 20
Accuracy class ISO5, 6, 7
Tooth surface roughness with grinding Ra0.8, Ra1.6
w/o grinding Ra3.2, Ra6.3
Defect control UT, MT,
Certification ISO9001
warranty: one year
Delivery Detail: 30-60 days

Internal spur gear

Internal spur gear

We can produce spur gear with external teeth and internal teeth. The internal gear diameter can up to 2500mm with gear grinding that accuracy of tooth surface reach roughness Ra0.8.

External gears have teeth that are cut on the outside surface of the cylinder. Two external gears mesh together and rotate in opposite directions. Internal gears, have teeth that are cut on the inside surface of the cylinder. An external gear sits inside the internal gear, and the gears rotate in the same direction. Because the shafts are positioned closer together, internal gear assemblies are more compact than external gear assemblies. Internal gears are primarily used for planetary gear drives.

Common material, we also can produce with material as per drawing requirement.

Material of gear and shaft with QT

Material C Si Mn Cr Mo Ni S P Cu
35CrMo 0.32~0.4 0.17~0.37 0.3~0.7 0.8~1.1 0.15~0.25 <=0.03 <=0.035 0.035 <=0.03
42CrMo 0.38~0.45 0.17~0.37 0.5~0.8 0.9~1.2 0.15~0.25 <=0.03 <=0.035 0.035 <=0.03
40CrNiMo 0.37~0.44 0.17~0.37 0.5~0.8 0.6~0.9 0.15~0.25 1.25~1.65 <=0.025 <=0.025
40CrMnMo 0.37~0.45 0.17~0.37 0.9~1.2 0.9~1.2 0.2~0.3 <=0.035 0.035
30Cr2Ni2Mo 0.26~0.34 0.3~0.6 1.8~2.2 0.5~0.8 1.8~2.2
34CrNiMo6 0.3~0.38 <=0.4 0.5~0.8 1.3~1.7 0.15~0.3 1.3~1.7 <=0.035 0.035

Material of gear and shaft with Carburizing and quenching

Material C Si Mn Cr Mo Ni S P Cu
17CrNiMo6 0.14~0.19 0.15~0.4 0.4~0.6 1.5~1.8 0.25~0.35 1.4~1.7 <=0.035 <=0.035
20CrMnMo 0.17~0.23 0.17~0.37 0.9~1.2 1.1~1.4 0.2~0.3 <=0.03 <=0.035 <=0.035 <=0.03
20CrNi2MoA 0.17~0.23 0.15~0.4 0.4~0.7 0.35~0.6 0.2~0.3 1.6~2 <=0.02 <=0.02 <=0.03