OIL SEAL - Metric R23 TC Lip Arrangement Rotary Shaft Seal - 70 72 75 80 85 90mm

Measure three dimensions on your existing seal or housing: the inner diameter (shaft size), the outer diameter (housing bore), and the depth (axial width of the housing recess). All three must match the variant you select. The option label format is Inner Ø × Outer Ø × Depth in millimetres. If you are replacing an OEM seal, the part number stamped on the old seal often encodes these three dimensions directly.

TC stands for Twin Contact, referring to the dual-lip arrangement: a primary radial sealing lip that contacts the shaft to retain lubricant, and a secondary dust-exclusion lip that faces outward to block dirt, water, and debris. This two-lip design provides superior protection compared to single-lip (SC) seals in environments where external contamination is a concern.

These R23 TC seals are designed for general-purpose rotary shaft applications. Shaft surface speed compatibility depends on the specific size and lubricant viscosity, but they are typically rated for moderate shaft speeds consistent with automotive axles, gearboxes, and industrial equipment. For very high-speed spindle or turbine applications, consult the equipment manufacturer's specification for the required seal type and surface speed rating.

NBR (nitrile rubber) is compatible with petroleum-based mineral oils, gear oils, hydraulic fluids, and greases. It is not recommended for use with synthetic esters, phosphate ester hydraulic fluids, or ketone-based solvents. If your application uses synthetic ATF or PAO-based gear oil, verify NBR compatibility with the fluid manufacturer before installation.

Clean the housing bore and shaft thoroughly before installation. Lightly lubricate the seal lip with the same oil or grease used in the application. Press the seal squarely into the housing bore using a seal driver or a flat plate of the correct diameter — never hammer directly on the seal face. Ensure the seal is flush or slightly below the housing face as specified. Avoid nicking or rolling the lip over the shaft keyway or splines during installation.

Yes. Metric TC-type shaft seals in the 70–90mm bore range are widely used in tractor axle housings, PTO gearboxes, combine harvester drives, excavator swing motors, and loader transmission cases. Confirm the inner diameter, outer diameter, and depth match your equipment's housing specification before ordering.

R23 defines the specific geometry and lip arrangement of the seal according to industry standards. TC (Twin Contact) within the R23 family means the seal has two sealing lips. Other designations such as SC (Single Contact/lip) or VC (with additional exclusion features) describe different lip configurations. Always match the replacement seal to the original designation to ensure correct sealing performance and fit.