PW Series Precision Lockwashers – Inch

The PW series is the precision inch lockwasher, the mating half of the PN and PL precision locknuts. Faces are ground flat and parallel so the washer does not introduce the very runout the precision nut exists to avoid.

PW Series Specifications

• Part numbers: PW-00 through PW-40 (33 sizes stocked)
• Bore / shaft size: 0.406 in to 7.982 in
• Outside diameter: 0.937 in to 10.594 in
• Material & temperature: Carbon steel, black oxide finish; 300°F maximum operating temperature
• Standards: ANSI/ABMA 8.2-1999; made in USA, RoHS compliant

Applications

Machine tool and grinding spindles, high-speed rotors and instrument drives where bearing preload accuracy governs performance.

Related Whittet-Higgins Series

• PN Series Precision Locknuts – Inch
• PL Series Precision Locknuts – Left-Hand Threads
• PWT Series Precision Lockwashers – Small Profile

Apollo is an authorized Whittet-Higgins distributor. Every part on this page is genuine Whittet-Higgins, manufactured in the USA. Need a size that is not listed, or help matching a locknut to its lockwasher and assembly socket? Contact our team.