NSK PAX-SU03 To Replace PAX-SU M4 and PAX-SU B2 cartridges. See Special Forward Bearing Cup and Air Dam Required. Replacement rotor autochuck mechanism with "motion activation" technology. The spindle housing has been further improved by hardening the steel to withstand numerous rebuilds and overhauls. Each rotor is serialized and carries a 6-month warranty. Made in USA
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