By using UMETA grease nipples with drive-in shank, you effectively save the thread-cutting process in the borehole.
Drive-in nipples as standard version are with plain shank, made of steel, zinc-plated and passivated. Upon request, UMETA manufactures drive-in grease nipples in other versions, with respect to the following:
The exact size of the core hole depends on the material and must be determined by mounting tests. The standard gauge for the installation bore diameter corresponds to the nominal width of the shank Ø.
Since this type of grease nipple is only driven in, it may get loose by
Drive-in type grease nipples, flush-type, should only be lubricated by a pointed nozzle.
Drive-in type grease nipples are only suitable for low pressures. Please check whether they can be replaced by self-forming nipples for a better fit.