1, the purpose of filling the linear guide with lubricant is to prevent metal contact between the track surface and the rolling body inside the linear guide, etc., to reduce friction and wear, and to prevent heating and sintering. When the rail surface and the rolling contact surface of the rolling body to form a composition of the oil film, also has the effect of reducing the contact stress due to load. Management of lubrication work, the full formation of oil film to ensure the reliability of the linear guide is very important.
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2, the choice of lubricant
To give full play to the performance of the linear guide, it is necessary to select the appropriate type of lubricant and lubrication method according to the form of linear guide, load, speed, etc. However, the linear guide and sliding guide, compared to the dependence on lubricant is very small, so the amount of oil to small, refilling interval is also long, can play the magnitude of reducing the burden of maintenance management. The lubricant used for linear guide can be roughly divided into two kinds of lubricant and lubricating oil.
3、Grease lubrication
Linear guide generally use lithium soap base grease (JIS consistency number 2), for heavy load, recommended to use with extreme pressure additives grease.
In the clean environment and high vacuum environment, can use synthetic oil as the base oil or lithium soap base other than low dustiness, volatile grease. When used in these environments, linear guide in line with the conditions of use at the same time, it is necessary to fully consider how to meet the lubrication performance.
4, grease refilling interval
Even if it is high quality grease, its performance will be aging with the running time, so it must be properly replenished. Grease refilling interval varies according to the conditions, generally 6 months, for long-distance reciprocating machinery, etc., it is recommended to add grease once every 3 months.
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5、Grease refilling method
From the grease spout and other grease filling device to fully inject grease, until the old grease discharge. After greasing for break-in operation, excess grease will be discharged from the linear guide, to remove the discharged grease and then start running.
Grease filling volume standard for linear guide internal space volume of about 1/3 to 1/2 for example, the first time from the grease nozzle grease filling, there will be part of the loss in the filling path, so it is necessary to consider the loss factor.
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