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HERCULES URETHANE BACKUP Ring 90A DUROMETER

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Alternate Part Numbers
Alternate Part Number C1BV61, Alternate Part Number MI-01263798, Alternate Part Number MINO-00407X80424
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Supplier Part Number
575-352
Product Weight
0.01 lbs
Product Questions & Answers 1

Product Questions & Answers

backup ring like this one, is the 90A durometer rating gonna hold up in a standard hydraulic cylinder without extruding under pressure?
Question by: Freddie A on Aug 7, 2025, 7:13 PM
90A durometer urethane is a pretty firm material, which is exactly what you want in a backup ring. Its whole job is to keep the primary seal from pushing into the clearance gap under pressure. Urethane at that hardness handles that role well in typical hydraulic cylinder applications without cold-flowing or deforming the way softer materials tend to.
Answer by: Customer Support on Aug 9, 2025, 6:21 AM