The structure of bearings consists of open and closes,and the close type might be equipped with metal shield on single side or both sides(Z.ZZ);with non-contct rubber seal on single side or both sides(RZ.2RZ),and with contact rubber seal on single side or both sides(RS.2RS).

Before ex works,the product is filled properly lubricant oil and grease.You may use it immediately after unpacking and cleaning is unnecessary.It is suitable fir light to middle load,low to middle speed and working temperatute -20C to 110C.For any special case,piease note usagge and brand of grease on your order.
The common brand and perfmance of grease is shown in page 16.