Cylinder Rod Seal, 1-7/8"X2-1/4"X3/8"

Cylinder Rod Seal, 1-7/8"X2-1/4"X3/8"

The U18-1.87-37B Cylinder Rod Seal is a Style 800 polyurethane U-cup seal engineered for high-performance hydraulic rod applications. Molded from tough 95A abrasion-resistant urethane, this seal features a four-lobed expander ring that energizes the sealing lips—even at zero pressure—to help prevent “weeping” when the system is idle. Designed for durability under pressure, it provides dependable sealing in demanding agricultural and industrial equipment.

Country of Origin
Varies by production batch

Key Features / Specifications

• Product / Part Number: U18-1.87-37B
• Alternate MFG Numbers: 187-01.875-375BUR95, 18701875Q375B, P18-1.87-37B, SU-00137, 81-0077, 1385288, 2530062, 10EUS/I 187225/1
• Seal Type: Style 800 U-Cup / Cylinder Rod Seal
• Material: 95A Polyurethane (Urethane)
• Rod Diameter (Nominal ID): 1-7/8 in (1.875 in)
• Outside Diameter (Nominal OD): 2-1/4 in (2.250 in)
• Nominal Height: 3/8 in (0.375 in)
• Cross Section: 3/16 in
• Groove Diameter (H): 1.875 in
• Groove Width (D): 0.413 in
• Housing Diameter (G): 2.250 in
• Piston Diameter (I): 2.249 in
• Throat Diameter (F): 1.876 in
• Temperature Range: -65°F to +220°F
• Pressure Range: 0 to 5,000 PSI
• Maximum Speed: 3 ft/sec
• Weight: 0.018695 lb
• Design Feature: Four-lobed expander ring energizes sealing lips, even at zero pressure

Ideal For

• Hydraulic cylinders requiring high-pressure rod sealing
• Applications needing abrasion-resistant polyurethane seals
• Equipment operating across wide temperature ranges
• Preventing leakage or “weeping” in idle hydraulic systems
• Agricultural, construction, and industrial hydraulic repairs where sealing reliability is critical