| abstract |
A gear part of the present invention includes a lubrication coating formed on a surface of the gear part, the lubrication coating containing an organic phosphorous compound. In the gear part, when a tooth surface of the gear part is engaged with a tooth surface of a counter member, the organic phosphorous compound is transferred to the tooth surface of the counter member and another lubrication coating containing the organic phosphorous compound is formed on the tooth surface of the counter member. As a result, the lubrication coating can be held on the surface of the gear part for long periods. |