FAQ / Taiwan_Based High Precision Ground Gears & Gear Increaser/Reducer For 40 Years | Shiuh Cheng Precision Gear Co., Ltd.

Gear Pitting

Gear Pitting

What are the types of tooth surface damage?

The failure of the gear mainly occurs on the tooth surface, and there are mainly the following five damage conditions.
1.Wear:
Insufficient lubricating oil, The oil is not clean, Tooth flanks had worn.
The wear makes the tooth thickness thinner and the tooth backlash increases, causing impact and in severe cases, the overload will be broken.

2.Plastic deformation:
Under overload, due to material yielding the tooth surface will have plastic flow,
mostly occurs on gears with low hardness.

3.Scuffing:
Also called scratches. Due to heat and load, the oil film will be destroyed due to the instantaneous high temperature, so that the raw metal tooth surfaces are in direct contact, causing the tooth surfaces to stick together.

4.Pitting:
Under long-term contact stress the tooth surface produces fatigue cracks, and the cracks continue to expand, causing small pieces of metal to peel off and form pits.
When the pitting is severe, vibration and abnormal sound will be generated.

5.Bending fatigue:
Also called tooth chipping, when the tooth surface is loaded, the largest bending stress at the root of the tooth, when the bending stress exceeds its ultimate stress, overload fracture or fatigue fracture occurs.


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Introduction of What are the types of tooth surface damage? | Taiwan_Based High Precision Ground Gears & Gear Increaser/Reducer For 40 Years | Shiuh Cheng Precision Gear Co., Ltd.

Located in Taiwan since 1994, Shiuh Cheng Precision Gear Co., Ltd. is a precision gear manufacturer. Main products, including level JIS O and German DIN4 level of precision ground gears & gear increasers/reducers.

With more than 40 years design and manufacturing gear increaser and reducer experience, SC GEAR is specialized in customizing precision gears and provide customized gearbox, overhaul, and reverse engineering services.

SC GEAR has been offering customers high-quality gears and gearboxes since 1994, both with advanced technology and 40 years of experience, SC GEAR ensures each customer's demands are met.