Contamination Protection and Lubrication
Roller Followers can be equipped with highly wear-resistant synthetic rubber seals to keep foreign matter out of the unit’s interior. A "UU" in the product code identifies a model equipped with seals. Some models are pregreased during assembly while others are not. For the latter, apply a grade-2 lithium-based grease to the interior and plug the grease hole before using the product.
Model No. | Grease |
---|---|
NAST | Not filled with grease |
RNAST | |
NAST-ZZ | Filled with grease |
NART | |
NURT |
The lubrication interval varies depending on the operating conditions. As a guide, however, replenish grease of the same group every six months to two years for types with a cage, or every one to six months for full-roller types. Even with types equipped with seals ("...UU"), surplus grease may seep during the initial operation period or immediately after resumption of grease replenishment. If desiring to avoid contamination of the surrounding area of the machine by grease, first perform seasoning or the like in advance, and then wipe the seeping surplus grease.