General purpose spring loaded single lip oil seals are available from Parker in materials of construction which include varying metal case OD configurations to suit the application . A garter spring provides constant, uniform load of the lip on the shaft for the life of the seal. The spring keeps the elastomer lip in contact with the shaft during higher shaft speeds and also helps offset normally occurring compression set and wear of the lip material.

Standard Designs:

SB Profile: Spring loaded elastomer ID lip. Metal case with ParKote™ bore sealant or ground OD. Most common and economical

SC Profile: Spring loaded elastomer ID lip. Rubber covered metal case OD for improved OD sealing in bores with minor imperfections and in soft alloy housings.

SA Profile: Spring loaded elastomer ID lip. Double metal case where inner case provides structural rigidity for large cross-sections. ParKote™ coating is standard.

Typical operating ranges for standard designs:

Standard Lip Materials:
NBR: Temp -20F / +250F
FKM: Temp -40F / +400F

Shaft Surface Speed: Up to 3200 fpm (16.3 m/s) depending upon pressure

Maximum Pressure: 0 to 7 psi (0 to 0.48 bar) depending on shaft speed

Size Range: ¼ to 10 inches (6.4 to 254 mm)

Maximum Shaft Dynamic Runout (TIR): 0.010” (0.254 mm)

Maximum (STBM) Misalignment: 0.010” (0.254 mm)

Typical Applications:
For general purpose oil and grease retention in applications such as electric motors, gearboxes, pumps, fans, and rolling mills.