"W"

Washers - Round, flat rings used as spacers, gaskets or slip devices under the head of a bolt.

Water Absorption - The increase in weight and volume after immersion in water.

Water resistance - The ability to withstand swelling by water for a specified time and temperature.

Wear Rings - Wear rings, guide rings, guiding rings, bearing rings for hydraulic cylinder rods.

Wear Sleeves - Wear rings, guide rings, guiding rings, bearing rings for hydraulic cylinder rods.

Wear Strips - Strips of abrassion resistant plastic, PTFE or Teflon® material - Wear rings, guide rings, guiding rings, bearing rings for hydraulic cylinder rods.

Wetting - Completeness of contact between particles dispersed in a medium, such as carbon black rubber.

Wheels - Round rollers to provide easy movement of a machine or component.

Wiper Rings - Also, called a wiper ring - A ring which rides tight against a rod, with a sharp lip to scrape or wipe off excess oil, dirt or dust in a hydraulic or pneumatic cylinder.