TC Skeleton Oil Seal Ring Rotary Shaft Sealing FKM Double Lip Seals ID 105-300mm

Measure the shaft diameter (this is your ID), the housing bore diameter (this is your OD), and the housing depth or existing seal thickness. Match all three dimensions to the variant listed as ID × OD × Thickness. If your existing seal is still intact, the dimensions are usually stamped or molded on the outer face. When in doubt, measure with calipers rather than relying on part numbers from different manufacturers, as cross-references can vary.

A TC seal has two sealing lips: a primary radial lip that retains lubricant and a secondary lip that faces outward to exclude contaminants. An SC seal has a single lip. For most gearbox, axle, and pump applications where both oil retention and dust/moisture exclusion matter, TC is the standard choice. SC seals are used where space is limited or where the secondary lip would create excessive drag.

FKM (fluoroelastomer) maintains its elasticity and sealing force at higher temperatures — typically up to 200 °C continuous versus around 120 °C for standard NBR. FKM also resists a broader range of synthetic lubricants and hydraulic fluids that can cause NBR to swell or harden prematurely. If your equipment runs hot, uses synthetic oil, or operates in a chemically aggressive environment, FKM is the more durable choice despite its higher cost.

Yes. TC skeleton oil seals in the 105–300 mm ID range are commonly used in agricultural gearboxes, PTO shafts, combine harvester drives, and construction equipment axle housings. The FKM compound handles the petroleum-based gear oils and hydraulic fluids typical in these machines. Confirm the ID, OD, and thickness match your housing before ordering, as agricultural OEM dimensions can vary by manufacturer.

Clean the housing bore and lightly lubricate the outer diameter of the seal and the shaft contact area with the same oil the seal will retain. Use a seal driver or a flat press plate sized to the OD to press the seal in squarely — never hammer directly on the seal face. Press until the outer face is flush with or slightly below the housing surface. Avoid dragging the lip over keyways or splines; use a thin sleeve or tape to protect the lip during installation if the shaft has sharp features.

TC radial lip seals perform best on shaft surfaces with a finish of Ra 0.2–0.8 µm (8–32 µin) and hardness of at least 45 HRC in the contact zone to resist lip-induced wear grooves. Peripheral shaft speeds for FKM lip seals are typically suitable up to approximately 4–8 m/s depending on lip load and lubrication — contact us to confirm suitability for high-speed applications. Avoid using seals on shafts with visible scoring, corrosion pitting, or existing wear grooves without first repairing or sleeving the shaft.

Each order is for 1 PCS (one individual seal) as shown in the Packing QTY option. If you need multiple seals of the same size, adjust the cart quantity accordingly. Bulk pricing is not automatically applied at checkout — contact us if you need a quote for larger quantities.