Company Profile

Radial Shaft Seal Manufacturer Sourcing: Selection, Materials, and RFQ Data

Quick Answer: A radial shaft seal is a rotary oil seal that fits into a housing bore and seals against a rotating shaft. Buyers searching for a radial shaft seal manufacturer should compare shaft diameter, housing bore, width, material, temperature, pressure, speed, and fluid. CORASEALS supplies radial shaft seals in standard and custom profiles and quotes from drawings, samples, or complete application data.

What the inquiry should cover

An inquiry for a radial shaft seal manufacturer usually involves a rotating shaft, a housing bore, and a fluid that must be retained. The buyer needs a supplier that can confirm dimensions, material, lip design, and production source. CORASEALS handles that supply process and consolidates the quote across standard and custom profiles.

How CORASEALS supports the radial shaft seal inquiry

CORASEALS is an industrial seal supplier and exporter. CORASEALS supplies radial shaft seals from production-qualified supply chains. This gives buyers one quote path for standard sizes, custom dimensions, and different material grades. A radial shaft seal is not quoted by size code alone. CORASEALS asks for the full operating data to reduce the chance of a near-fit seal reaching the application.

How to specify a radial shaft seal

Radial shaft seal dimensions are normally written in the order ID × OD × width. Confirm whether the ID is the shaft diameter or the seal inside diameter. The OD must match the housing bore. The width must match the cavity or counterbore depth. A size alone does not define the lip type, spring arrangement, case material, or compound.

Standard radial shaft seals are commonly referenced to DIN 3760 or ISO 6194. These references help identify shaft and bore combinations. A standard number alone does not confirm lip design, spring type, dust lip, or material. Always pair the standard with a section drawing.

Profile codes and interchange risk

Codes such as TC, SC, TB, VB, and DC appear in many oil seal catalogs, but their definitions are not universal. A TC code from one source may have a different dust lip or spring arrangement from another source. Before ordering, compare the cross section drawing and confirm the lip, spring type, dust lip, and case material.

Material selection for radial shaft seals

• NBR for general mineral oil, gear oil, and hydraulic oil. Check temperature and additive limits.
• HNBR for higher heat and better abrasion resistance in selected oil and refrigerant applications.
• FKM for higher temperature, aggressive synthetic oil, fuel, and chemical exposure. Confirm compound for acidic or alkaline media.
• EPDM for water, steam, and some brake fluids. EPDM is not suitable for most mineral oils or fuels.
• Silicone for wide temperature exposure in low dynamic load rotary applications. Silicone has limited abrasion resistance at higher shaft speeds.
• Polyurethane for high wear and low speed applications. Confirm temperature, water, and hydrolysis limits.
• PTFE for high temperature, chemical resistance, and low friction in demanding rotary service.

Material choice cannot be based on price alone. A low cost compound that hardens or swells in service will cause early leakage and shaft wear. Send the actual fluid and temperature data before finalizing the compound.

Operating conditions that affect seal life

• Shaft diameter and housing bore
• Seal width and cavity depth
• Shaft surface finish and shaft hardness
• Dynamic runout and shaft eccentricity
• Rotating speed and calculated surface speed
• Operating temperature
• Pressure