Metric TC Rotary Oil Shaft Seal FKM Fluorine Double Lip Seal 130mm - 195mm Shaft

Measure three dimensions from your existing seal or equipment manual: Inner Diameter (shaft OD), Outer Diameter (housing bore ID), and Depth (axial width). Match all three to the variant options listed above. If your existing seal is worn, measure the housing bore for the outer diameter and the shaft for the inner diameter using calipers. Even a 0.5mm mismatch can cause leakage or installation failure.

A TC seal has two sealing lips: a primary spring-loaded lip that retains lubricant and a secondary lip that excludes dust and contaminants. An SC seal has only a single lip. TC seals are preferred in environments where both oil retention and contamination exclusion are needed, such as gearboxes, axles, and agricultural equipment exposed to dirt and debris.

FKM (fluoroelastomer) offers significantly higher temperature resistance (up to ~200°C vs. ~120°C for NBR) and superior chemical resistance to synthetic oils, fuels, and aggressive lubricants. If your application involves high operating temperatures, synthetic gear oils, or ATF fluids, FKM is the appropriate choice. NBR is suitable for standard mineral oil applications at moderate temperatures.

TC oil seals with garter springs are designed for rotary shaft applications. Acceptable shaft surface speed depends on the specific seal size, shaft surface finish (Ra 0.2–0.8 µm recommended), and lubricant viscosity. For very high-speed applications, confirm the shaft surface speed against the seal manufacturer's specification. A smooth, hardened shaft surface (45–55 HRC) is recommended for optimal seal life.

Clean the housing bore and shaft thoroughly. Lightly lubricate the sealing lip with the fluid being sealed. Press the seal squarely into the housing bore using a seal driver or flat plate — never hammer directly on the seal face. Ensure the seal is flush or slightly below the housing face. Protect the sealing lip from sharp shaft edges during installation using a sleeve or tape over keyways and threads.

Yes. FKM fluoroelastomer has excellent compatibility with most synthetic gear oils, automatic transmission fluids (ATF), and hydraulic fluids. It is also resistant to many fuels and aromatic hydrocarbons. Always verify compatibility with your specific fluid if it contains unusual additives or is a specialty formulation.

For reliable TC oil seal performance, the shaft surface in the sealing zone should have a surface roughness of Ra 0.2–0.8 µm (8–32 µin), with a lead-free finish (no machining spiral). The shaft should be hardened to 45–55 HRC to resist lip wear. Corrosion, scoring, or grooves in the sealing zone will cause premature leakage regardless of seal quality.