Cylinder Rod Seal, 1-1/4"X1-1/2"X3/16"

Cylinder Rod Seal, 1-1/4"X1-1/2"X3/16"

The U12-1.25-18B Cylinder Rod Seal is an 800 Series polyurethane U-seal engineered for high-performance hydraulic rod sealing. Molded from tough 95A abrasion-resistant polyurethane, this seal features a four-lobed expander ring that energizes the sealing lips—even at zero pressure—to help prevent “weeping” when systems are idle. Designed for durability under demanding conditions, it delivers reliable sealing up to 5,000 PSI in hydraulic cylinder applications.

Country of Origin
Varies by production batch

Key Features / Specifications

• Part Number: U12-1.25-18B
• Alternate MFG Numbers: 125-01.250-187BUR95, 12501250Q187B, P12-1.25-18B, 2530028
• Seal Type: 800 Series U-Seal (Rod Seal)
• Material: 95A Polyurethane (Urethane)
• Inside Diameter (ID): 1.250 in (1-1/4")
• Outside Diameter (OD): 1.500 in (1-1/2")
• Height: 0.180 in (3/16" nominal)
• Cross Section: 1/8
• Pressure Range: 0 to 5,000 PSI
• Temperature Range: -65°F to +220°F
• Maximum Speed: 3 ft/sec
• Rod Size: 1.250 in
• Bore Size: 1.500 in
• Groove Diameter (H): 1.250 in
• Groove Width (D): 0.206 in
• Housing Diameter (G): 1.500 in
• Piston Diameter (I): 1.499 in
• Throat Diameter (F): 1.251 in
• Weight: 0.014 lb
• Design Feature: Four-lobed expander ring energizes lips at zero pressure

Ideal For

• Hydraulic cylinder rod sealing applications
• Systems operating up to 5,000 PSI
• Equipment exposed to abrasion and demanding service conditions
• Applications requiring reliable sealing performance even during idle or low-pressure conditions