Zatkoff 55551314, Molygard Wear Ring (Pack of 2)

This is a Zatkoff Seals & Packings MolyGard wear ring, part number 55551314, packaged as a set of two. Wear rings, also called bearing rings or guide rings, sit in grooves on a hydraulic cylinder piston or in the rod gland. They keep metal parts centered, carry side loads and stop the piston or rod from rubbing against the bore, which protects the seals and the cylinder surfaces.

MolyGard is a Zatkoff bearing material, designation W4650, which the company describes as offering long life and high strength for light to medium duty hydraulic service. The published physical properties include 17,500 psi tensile strength, 21,000 psi compressive strength and 0.60 percent deformation under a 4000 psi load. The package label lists batch 4650E0111, which matches the W4650 material code, a cure date of 4Q17 and U.S.A. origin.

Hydraulic repair shops, cylinder rebuilders and equipment maintenance departments buy wear rings by part number when resealing cylinders on mobile, construction, agricultural and industrial machinery. Zatkoff is a sealing distributor and fabricator based in Farmington Hills, Michigan.

Available from King Surplus inventory in Del Rio, Texas.

• Manufacturer (label): Zatkoff Seals & Packings, Farmington Hills, MI
• Part Number: 55551314
• Description (label): MolyGard Wear Ring
• Package Quantity (label): 2
• Material: MolyGard W4650 bearing material (batch number 4650E0111)
• Cure Date (label): 4Q17
• Water Absorption, 24 h, ASTM D570: 0.80%
• Tensile Strength, ASTM D638: 17,500 psi
• Tensile Modulus, ASTM D638: 952 Kpsi
• Shear Strength, ASTM D732: 9,390 psi
• Flexural Strength, ASTM D790: 22,600 psi
• Flexural Modulus: 860 Kpsi
• Notched Izod Impact, ASTM D256: 1.37 ft-lbs/in
• Deformation Under Load, ASTM D621 (24 h at 4000 psi): 0.60%
• Compressive Strength, ASTM D695: 21,000 psi
• Rockwell Hardness, ASTM D785: M77 / R114
• Country of Origin (label): U.S.A.
• Spec Basis: package label read from photos; Zatkoff WearGard Bearing Material bulletin 5213B1, MolyGard W4650 column (https://www.zatkoff.com/cm/23f16627-5e25-4b70-a1e1-d4a09e4e16c0.pdf); Zatkoff WN profile wear ring page (https://www.zatkoff.com/catalog/master-catalog/wn-profile-wear-ring)