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Radial Shaft Seal Supplier: Selection, Sizes, Materials, and RFQ Information
Quick Answer: CORASEALS is a radial shaft seal supplier covering single lip, double lip, rubber cased, metal cased, and PTFE lip designs. Send the shaft diameter, housing bore, seal width, fluid, operating temperature, pressure, shaft speed, and drawing to receive a quotation.
Radial shaft seal supplier evaluation starts with the shaft diameter, housing bore, and seal width. CORASEALS supplies radial shaft seals, rotary shaft seals, oil seals, bearing seals, gearbox seals, and custom lip seal profiles for industrial equipment. The correct seal depends on the lip type, case design, material, fluid, temperature, shaft speed, and installation conditions.
What a Radial Shaft Seal Does
A radial shaft seal seals a rotating shaft against the housing bore. The seal keeps oil or grease inside the housing and keeps dust, water, and dirt outside. Radial shaft seals are also called rotary shaft seals or lip seals in many product catalogs.
Standard radial shaft seals are normally designed for low pressure or non pressurized housing conditions. If the equipment has internal pressure, the supplier must check the pressure, lip type, and case retention method. Seal performance also depends on shaft surface finish, shaft hardness, runout, and lubrication condition.
Material Selection
Material choice depends on the fluid, temperature range, shaft speed, and possible dry running. The table below lists common radial shaft seal material options and typical uses. The final material should be confirmed against the full operating condition.
| Material | Common Uses | Limitations to Check |
|---|---|---|
| NBR | Petroleum oils, water glycols, general lubrication | Limited high temperature and aggressive chemical resistance |
| FKM | Fuels, oils, many acids, high temperature conditions | Higher cost than NBR, not always needed for mild oil |
| EPDM | Water, steam, brake fluids, washing fluids | Not suitable for most mineral oils and many petroleum fluids |
| PTFE lip | Aggressive chemicals, dry running, low friction | Requires proper shaft surface and careful installation |
| Polyurethane | High wear conditions and some higher pressure lip designs | Limited water and high temperature resistance in some grades |
The case material and spring material must match the external environment. Stainless steel cases may be needed for corrosive exterior conditions. The lip material selection must also consider shaft speed in rpm or m/s, because high speed changes heat buildup and lip contact behavior.
Size and Standard Notes
Radial shaft seals are normally specified as shaft diameter × housing bore × width. For metric seals, this means ID × OD × width in millimeters. Inch sizes are also common for equipment built in North America and other markets.
Many radial shaft seals follow ISO 6194 or DIN 3760 dimensional conventions. Users sometimes refer to type codes such as TC, SC, or TB. Type codes are not always identical across catalogs. CORASEALS confirms the seal profile, cross section drawing, and dimensions before quoting a replacement or interchange. If the seal cross section is unknown, a drawing or sample photo helps.
Application Scope
Radial shaft seals are used in gearboxes, axles, wheel hubs, pumps, motors, bearing housings, conveyor drives, agricultural machinery, construction equipment, and industrial gear units. The supplier needs the application data to select the right case material, lip material, spring type, and dust lip configuration.
CORASEALS supports industrial end users, distributors, repair service providers, and equipment