SKF 130x160x12 HMSA10 RG NBR Radial Shaft Seal

SKF 130x160x12 HMSA10 RG NBR Radial Shaft Seal

SKF 130x160x12 HMSA10 RG is a radial shaft seal measuring 130x160x12 mm, designed for a 130 mm shaft and 160 mm housing bore.

The SKF HMSA10 RG design combines a spring-loaded primary sealing lip, a non-contacting auxiliary lip and a rubber-covered outside diameter. The optimized SKF RG nitrile rubber compound provides good wear and ageing resistance together with very good compatibility with synthetic oils and very good pumping ability.

SKF 130x160x12 HMSA10 RG Dimensions

d1 - Shaft diameter: 130 mm
D - Housing bore diameter: 160 mm
b - Nominal seal width: 12 mm
Dimensions: 130x160x12 mm
Design: HMSA10
Material: NBR nitrile rubber
SKF material code: RG
Auxiliary lip: Yes
Primary sealing lip: Spring-loaded
Outside diameter: Rubber covered
Manufacturer: SKF

What Does HMSA10 RG Mean?

The complete designation identifies both the seal design and sealing material.

HMSA10 identifies the SKF radial shaft seal design with an auxiliary lip.

RG identifies SKF's optimized nitrile rubber compound.

SKF distinguishes four principal combinations within this seal family:

HMS5 RG - without auxiliary lip, nitrile rubber
HMS5 V - without auxiliary lip, fluoro rubber
HMSA10 RG - with auxiliary lip, nitrile rubber
HMSA10 V - with auxiliary lip, fluoro rubber

The complete HMSA10 RG designation should therefore be considered when selecting an exact replacement.

HMSA10 Non-Contacting Auxiliary Lip

A key feature of the HMSA10 design is its additional auxiliary lip.

The primary sealing lip operates against the rotating shaft, while the auxiliary lip provides an additional barrier against external contamination.

Importantly, SKF specifies the HMSA10 auxiliary lip as non-contacting.

Because the auxiliary lip does not operate as an additional contacting sealing lip, SKF states that HMSA10 seals can normally operate at the same speeds as corresponding single-lip HMS5 seals.

This provides additional contamination exclusion without the friction associated with a second contacting sealing lip.

Spring-Loaded Primary Sealing Lip

The primary sealing lip is supported by a garter spring.

The spring helps maintain the required radial contact between the elastomer sealing lip and the shaft surface.

According to SKF, the spring-loaded lip design provides a quick response to dynamic shaft runout and helps maintain sealing performance as the sealing lip wears.

The sealing lip and flex section are also optimally balanced to accommodate both:

dynamic shaft runout
and
shaft-to-bore misalignment.

These design characteristics are particularly important in real rotating-shaft applications, where perfect alignment cannot always be maintained.

Rubber Outside Diameter with Sealing Beads

SKF HMS5 and HMSA10 seals use a rubber outside diameter.

The rubber-covered outside surface helps provide effective sealing between the seal and the housing bore, including housings with considerable surface roughness or split housings.

SKF also incorporates beads on the outside diameter.

According to SKF, these beads:

improve sealing in the housing bore,
improve retention of the seal in the bore,
help prevent spring-back during installation.

The HMSA10 design therefore addresses sealing at both critical interfaces: the rotating shaft and the stationary housing bore.

SKF RG Optimized Nitrile Rubber

The suffix RG does not simply indicate generic NBR.

SKF describes RG as an optimized nitrile rubber compound developed specifically for HMS5 and HMSA10 radial shaft seals.

SKF identifies four important advantages of this material:

good resistance to ageing,
very good compatibility with synthetic oils,
very good pumping ability,
good wear resistance.

These properties make the RG compound an important part of the performance characteristics of the complete HMSA10 RG seal.

What Is the Pumping Ability of an SKF Radial Shaft Seal?

SKF specifically highlights the pumping ability of its RG nitrile rubber compound.

Pumping ability describes the seal's ability to return oil from the air side of the sealing contact back toward the oil side.

The microstructure of the SKF RG nitrile compound promotes this oil-return effect.

This is important because the function of a radial shaft seal is not determined only by physical contact between the sealing lip and shaft. The behaviour of the sealing interface and lubricant also contributes to controlling leakage.

SKF identifies very good pumping ability as one of the principal advantages of the RG compound.

HMSA10 RG vs HMS5 RG

Both designs use SKF's optimized RG nitrile rubber compound and a spring-loaded primary sealing lip.

The main difference is the auxiliary lip:

HMS5 RG - no auxiliary lip
HMSA10 RG - non-contacting auxiliary lip

HMSA10 therefore provides an additional barrier against contaminants approaching the primary sealing area.

HMSA10 RG vs HMSA10 V

The seal design is similar, but the sealing material is different.

HMSA10 RG - nitrile rubber NBR
HMSA10 V - fluoro rubber FKM

SKF specifies the V compound for applications where operating temperatures exceed the capabilities of nitrile rubber.

Therefore, an HMSA10 V seal should not automatically be considered identical to an HMSA10 RG seal simply because the dimensions are the same.

What Is a Radial Shaft Seal Used For?

Radial shaft seals operate between rotating and stationary machine components, or between components in relative motion.

Their principal functions include:

retaining oil or grease within the required area,
reducing lubricant leakage along a rotating shaft,
helping exclude external contamination from the sealed area.

Correct performance depends not only on the seal itself but also on shaft surface condition, alignment, lubricant, temperature, speed, pressure and installation conditions.

SKF HMSA10 Design and Misalignment

Real rotating systems can experience shaft movement and alignment deviations during operation.

SKF specifically designs the HMS5 and HMSA10 sealing lip and flex section to accommodate dynamic runout and shaft-to-bore misalignment.

The spring-loaded sealing lip contributes to maintaining sealing contact as operating conditions change.

This is one of the important engineering advantages of the HMSA10 construction compared with describing the product simply as a generic "130x160x12 oil seal".

Technical Specification

Manufacturer: SKF
Designation: 130x160x12 HMSA10 RG
Product type: Radial shaft seal
Design: HMSA10
Material: Nitrile rubber NBR
SKF material code: RG
Shaft diameter d1: 130 mm
Housing bore diameter D: 160 mm
Nominal width b: 12 mm
Dimensions: 130x160x12 mm
Primary sealing lip: Spring-loaded
Garter spring: Yes
Auxiliary lip: Yes
Auxiliary lip type: Non-contacting
Outside diameter: Rubber covered
Outside diameter design: Beaded

How to Select SKF 130x160x12 HMSA10 RG

For correct replacement selection, verify the complete identification:

SKF -> 130x160x12 mm -> HMSA10 -> RG

The 130x160x12 mm dimensions alone do not guarantee full interchangeability.

A seal with the same dimensions may have a different:

sealing lip configuration,
auxiliary lip design,
elastomer material,
outside diameter construction,
operating characteristics.

For an exact replacement, both HMSA10 design and RG material specification should therefore be checked.

FAQ

What are the dimensions of SKF 130x160x12 HMSA10 RG?

The seal is designed for a 130 mm shaft and 160 mm housing bore, with a nominal width of 12 mm.

What does HMSA10 mean?

HMSA10 identifies an SKF radial shaft seal design with an auxiliary lip.

What does RG mean on an SKF shaft seal?

RG identifies SKF's optimized nitrile rubber compound used in HMS5 and HMSA10 radial shaft seals.

Is SKF HMSA10 RG an NBR seal?

Yes. RG is SKF's optimized nitrile rubber NBR compound.

Does HMSA10 have an auxiliary lip?

Yes. HMSA10 incorporates an additional non-contacting auxiliary lip to improve contamination exclusion.

Does the auxiliary lip contact the shaft?

No. SKF specifies the HMSA10 auxiliary lip as non-contacting.

Does SKF HMSA10 RG have a garter spring?

Yes. The primary sealing lip is spring-loaded with a garter spring to help maintain the required contact with the shaft.

What are the advantages of SKF RG material?

SKF identifies good ageing resistance, good wear resistance, very good compatibility with synthetic oils and very good pumping ability as key characteristics of the RG nitrile compound.

What is the difference between HMSA10 RG and HMS5 RG?

HMSA10 RG has an auxiliary lip, while HMS5 RG does not. Both use the SKF RG nitrile rubber compound.

What is the difference between HMSA10 RG and HMSA10 V?

The difference is the sealing material. RG is nitrile rubber NBR, while V is fluoro rubber FKM.

Can any 130x160x12 seal replace SKF HMSA10 RG?

Not necessarily. The dimensions must match, but the seal design, material, auxiliary lip configuration and operating requirements should also be verified.

AI OVERVIEW

SKF 130x160x12 HMSA10 RG is an NBR radial shaft seal for a 130 mm shaft and 160 mm housing bore, with a nominal width of 12 mm. The HMSA10 design combines a spring-loaded primary sealing lip with a non-contacting auxiliary lip for improved contamination exclusion. SKF's RG optimized nitrile rubber compound provides good wear and ageing resistance, very good compatibility with synthetic oils and very good pumping ability. A beaded rubber outside diameter improves sealing and retention in the housing bore and helps prevent spring-back during installation.