Company Profile

Rotary Seal Manufacturer: Sizing, Materials, and Sourcing Guide

Quick Answer: A rotary seal manufacturer supplies seals that retain oil around rotating shafts and exclude dirt, water, and dust. CORASEALS provides radial shaft seals, oil seals, cassette seals, V-rings, and bearing seals in standard and custom sizes. Send the shaft diameter, housing bore, width, speed, oil type, and temperature to receive a quotation.

Rotary seals are used in gearboxes, pumps, motors, axles, and bearing housings. The seal must match the shaft diameter, housing bore, and width. Any mismatch in surface finish, runout, or material selection can cause early leakage.

Rotary Seal Types Covered by CORASEALS

CORASEALS offers the following rotary seal types:

Radial shaft seals with single lip or double lip designs
Oil seals in common profiles such as TC and SC
Cassette seals for heavy dirt and dust exposure
V-rings and bearing seals for protecting shafts from dirt and splash

Do not rely on the profile code alone. TC, SC, and other code names can have different meanings in different catalogs. The cross section, lip arrangement, and dimensions must be checked before ordering.

Sizing Information Required

Rotary shaft seals are normally described by shaft diameter, housing bore, and width. Some customers refer to ID, OD, and width. CORASEALS asks for all three dimensions plus the bore depth and shoulder details when available.

Many rotary shaft seals follow DIN 3760 or ISO 6194. Standard sizes are common, but custom sizes and non-standard profiles are also available. Always measure the actual shaft and housing. Do not order by model name alone.

Material Selection

Material selection depends on fluid, temperature, and speed. NBR is commonly selected for mineral oil. FKM resists higher temperatures and many fuels. HNBR offers better heat and wear resistance. PTFE can be used for low friction or chemical exposure, often with a metal shell or O-ring energizer.

No single material suits every application. EPDM rotary seals work with water and some brake fluids but not with most mineral oils. Silicone seals may tolerate wide temperature ranges but have lower strength than NBR or FKM. Confirm fluid compatibility before choosing a rubber compound.

Common Application Checks

Before ordering a rotary seal, check the shaft surface finish, hardness, and runout. A shaft with spiral grooves, pitting, or excessive runout can destroy the lip quickly. The housing bore must have a clean lead-in chamfer. Sharp edges should be removed before installation.

The lip direction must match the fluid side. A reversed lip can leak immediately or after a short run time. When the seal is installed, apply even pressure around the outer case and avoid contact between the lip and sharp splines or keyways.

How to Request a Quotation

A clear inquiry helps any rotary seal manufacturer or supplier match the right seal quickly. Send the following details to CORASEALS:

Seal type or profile
Shaft diameter, housing bore, and width
Material preference, if known
Operating temperature and fluid
Shaft speed and pressure
Drawing, sample photo, or manufacturer part number
Required quantity

If you only have an old seal, measure the ID, OD, and width. Photograph the lip side and the outer surface. CORASEALS can help match the profile against standard options and custom tooling.

FAQ

What is the difference between a rotary seal and an oil seal?

A rotary seal is the broader category. An oil seal is a type of radial shaft seal designed mainly to retain oil. People often use the two terms for the same part. CORASEALS asks for profile and dimensions to avoid confusion.