Hiwin "original" sold by Aliexpress seller Topper HZ measured across the block at 260mm from the left.
This was sold as P precision grade.
Per Hiwin catalog P grade allows for 7 microns (3 tens) height variation on the block and 11 microns (5 tens) rail parallelism. Combined is 18 microns while I measured 30 microns on rail one and 60 microns on rail two. Not even a C grade Hiwin rail. Spoke with a Hiwin customer representative and based on rail serial number was supposed to be an H not P and most likely counterfeit
Негізгі бет Hiwin "original" rail one at 260mm from left measurement
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