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linear sleeve bearing is usually made with copper alloy, don't have self lubricating effect, to do with copper alloy because the graphite copper set of its hardness was lower than those of steel, copper alloy as the loss of it is to protect the parts.

you need to have the lubrication effect, can mold guide sleeve to buy self-lubricating bearings, is some holes on the copper set of distribution, plastic embedded in the hole, such as ptfe or graphite, when the copper set of the shaft with internal mutual operation after a period of time, copper set of problems rise, plastic out of the hole, the plastic as a lubricant.

I used before, made from TGLWN T shaped slide bearing of guidance, I will choose the bronze wear oval washer, size can be customized.It's very convenient.

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