The two automatic parts washers perform essential roles in the automotive plant’s engine
build process. One machine washes engine blocks of impurities after machining, while the
second performs the same task on motor heads. A full AIP (Added Value Programme)
application review performed by expert NSK engineers revealed that the two component
washers were suffering from high levels of corrosion, prompted by wash solution containing
a mixture of metal residue, coolant and cleaning chemicals. This oxidisation was
prematurely damaging the bearings within the four linear guides mounted on the underside
of the machine, leading to seizures. NSK’s team of specialists therefore recommended the
adoption of NH series linear guides.
High-quality NH/NS linear guides offer far greater service life due to the inclusion of
innovative features like specially developed ball groove geometry. In addition, up to 30%
more dynamic load rating helps to provide users with double the fatigue life of previous
generation products in a compact and lightweight format.
Importantly, the NH series is available with a selection of innovative coatings to provide
protection from harsh operating conditions. At the automotive plant, NSK recommended
hard chrome plating to provide both corrosion resistance and increased durability. The NH
linear guides, supplied in lengths of 360 mm to suit the automatic parts washers, also
feature a double seal, metal protector and NSK’s K1 lubrication unit for long-term
maintenance-free operation. The K1 is ideal for applications where regular grease
replenishment is difficult or where it can easily wash away.
Following a successful trial period with no failures whatsoever, the use of NH series linear
guides on the component washing machines is providing considerable year-on-year
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