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SKF Rotary Shaft Seal: 1 Lip w/Spring, HMS4, Nitrile, 20 mm ID, 28 mm OD - Single-Lip Oil Seals with Rubber-Enclosed Cases for Rough Bores
SKFSingle-Lip Oil Seals with Rubber-Enclosed Cases for Rough Bores

SKF Rotary Shaft Seal: 1 Lip w/Spring, HMS4, Nitrile, 20 mm ID, 28 mm OD

The SKF Rotary Shaft Seal is a single-lip oil seal with a rubber-enclosed case for rough bores, featuring an HMS4 seal design. This metric seal has a 20 mm inner diameter, 28 mm outer diameter, and 6 mm width…

SKU 3G-OTH-122659

Brand
SKF
Item
Rotary Shaft Seal: 1 Lip w/Spring, HMS4, Nitrile, 20 mm ID, 28 mm OD
Category
Single-Lip Oil Seals with Rubber-Enclosed Cases for Rough Bores
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Technical Specifications

SKF
Manufacturer Part Number
20X28X6 HMS4 R
Type
HMS4, Nitrile
OD
28 mm
Wd
6 mm
ID
20 mm
Seal Design
HMS4
System of Measurement
Metric
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SKF Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SKF Rotary Shaft Seal is a single-lip oil seal with a rubber-enclosed case for rough bores, featuring an HMS4 seal design. This metric seal has a 20 mm inner diameter, 28 mm outer diameter, and 6 mm width, constructed from nitrile material with a spring. It is manufactured by SKF under part number 20X28X6 HMS4 R.

Frequently Asked Questions

What is the SKF 20X28X6 HMS4 R rotary shaft seal used for?

The SKF 20X28X6 HMS4 R is a single-lip oil seal designed to retain lubricants and exclude contaminants in rotating shaft applications. It is commonly used in gearboxes, pumps, and motors where a 20 mm shaft and 28 mm housing bore require a reliable seal in rough bore conditions.

What are the specifications of the SKF 20X28X6 HMS4 R seal?

This SKF rotary shaft seal has a 20 mm inner diameter, 28 mm outer diameter, and 6 mm width. It features an HMS4 seal design with a nitrile rubber-enclosed case and a spring. The system of measurement is metric, and the manufacturer part number is 20X28X6 HMS4 R.

Where to buy the SKF 20X28X6 HMS4 R seal worldwide?

You can source the SKF 20X28X6 HMS4 R seal through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this SKF part.

How to install the SKF HMS4 rotary shaft seal?

To install the SKF HMS4 seal, ensure the shaft and housing bore are clean and free of burrs. Apply a thin lubricant to the seal lip and shaft. Use a seal installation tool to press the seal evenly into the bore, avoiding damage to the nitrile lip. Never hammer directly on the seal.

Used in

Common applications for SKF
Heavy machinery gearboxes — SKF spherical roller bearings (e.g., 24056 CCK30/W33) for high radial load capacity
Electric motor repair — SKF cylindrical roller bearings (e.g., NJ 307 ECP/C3) for free axial expansion
Pump shaft sealing — SKF CRWA1 rotary shaft seals (e.g., 17100) for fluid retention in rotating equipment
Conveyor system maintenance — SKF wear sleeves (e.g., 99274) to protect shafts from seal abrasion
Machine tool spindles — SKF angular contact bearings (e.g., 7413 BGBM) for axial load support in duplex sets
Industrial fan assemblies — SKF spherical roller bearings (e.g., 23044 CC/W33) for misalignment accommodation

SKF Products

3G Electric supplies SKF single-lip oil seals with rubber-enclosed cases for rough bores. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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