radial shaft seal supplier

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 manufacturers that need radial shaft seals and related sealing products. The same inquiry process applies to oil seals, rotary shaft seals, cassette seals, bearing seals, and axle seals.

What to Send to a Radial Shaft Seal Supplier

To prepare a radial shaft seal quotation, send the following information:

Shaft diameter × housing bore × width, with units marked as mm or inch
Seal type, such as single lip, double lip, rubber cased, metal cased, or PTFE lip
Operating temperature range
Pressure condition, in bar or MPa if the housing is not vented
Shaft speed in rpm and m/s if known
Fluid or medium, including oil type, fuel, water, chemical, or grease
Shaft surface finish, hardness, runout, and rotation direction if available
Material hardness in Shore A if the application requires a specific value
Drawing, sample photo, or existing part number
Required quantity and target delivery condition

Send the seal type, material, ID × OD × width, operating temperature, pressure, medium, shaft speed, drawing, sample photo, and required quantity to CORASEALS. The requested information helps the supplier check the sealing lip, case fit, and material compatibility before quotation.

Common Causes of Radial Shaft Seal Leakage

Shaft wear or grooves at the lip contact line
Incorrect surface finish or excessive shaft runout
Wrong lip material for the fluid or temperature
Damaged case or bore fit during installation
Installation error that folds or cuts the lip
Pressure buildup beyond the seal design limit
Contamination from dust, dirt, or hard particles entering the lip

FAQ

What does a radial shaft seal supplier need for quotation?

CORASEALS needs the shaft diameter, housing bore, seal width, fluid, temperature, pressure, shaft speed, and existing drawing or part number.

Is a radial shaft seal the same as an oil seal?

Radial shaft seal and oil seal often describe the same product family. Oil seal is more common for oil retaining shaft seals. Radial shaft seal is used in many ISO 6194 and DIN 3760 related specifications.

Can CORASEALS supply nonstandard radial shaft seal sizes?

Send the ID × OD × width, drawing, material, and quantity. CORASEALS can check tooling and custom profile options based on the required dimensions.

Which material should be selected for high temperature oil?

FKM is often selected for high temperature petroleum oils and fuels. PTFE lip seals may be considered for aggressive chemicals, dry running, or low friction conditions. The final selection must be checked against the full fluid and temperature condition.

What are common radial shaft seal leak causes?

Common causes include shaft wear, incorrect surface finish, excessive runout, wrong lip material, installation damage, and pressure beyond the seal design limit.

For a radial shaft seal quotation, contact CORASEALS with the shaft diameter, housing bore, width, fluid, temperature, pressure, shaft speed, drawing, sample photo, and required quantity.