Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 3.438 in ID, 4.249 in OD - Single-Lip Oil Seals with Metal Cases for Smooth Bores
SKFSingle-Lip Oil Seals with Metal Cases for Smooth Bores

SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 3.438 in ID, 4.249 in OD

The SKF Rotary Shaft Seal is a single-lip oil seal with a metal case for smooth bores, featuring the CRW1 seal design. This inch-system seal has a 3.438 in ID, 4.249 in OD, and 0.375 in width, with a nitrile lip and…

SKU 3G-OTH-124514

Brand
SKF
Item
Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 3.438 in ID, 4.249 in OD
Category
Single-Lip Oil Seals with Metal Cases for Smooth Bores
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

SKF
Manufacturer Part Number
34256
Type
CRW1, Nitrile
OD
4.249 in
Wd
0.375 in
ID
3.438 in
Seal Design
CRW1
System of Measurement
Inch
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

SKF Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SKF Rotary Shaft Seal is a single-lip oil seal with a metal case for smooth bores, featuring the CRW1 seal design. This inch-system seal has a 3.438 in ID, 4.249 in OD, and 0.375 in width, with a nitrile lip and an integral spring (MPN 34256).

Frequently Asked Questions

What is the SKF Rotary Shaft Seal CRW1 used for?

The SKF Rotary Shaft Seal CRW1 is used to retain lubricants and exclude contaminants in rotating shaft applications. It is commonly installed in industrial gearboxes, pumps, and motors where a single-lip seal with a metal case fits a smooth bore. The nitrile lip and integral spring provide reliable sealing under moderate speeds and temperatures.

What are the specifications of the SKF 34256 rotary shaft seal?

The SKF 34256 rotary shaft seal has a 3.438 in ID, 4.249 in OD, and 0.375 in width. It uses the CRW1 seal design with a single nitrile lip and an integral spring. The system of measurement is inch, and the metal case is designed for smooth bores. This is a standard single-lip oil seal for general industrial use.

Where to buy SKF rotary shaft seals worldwide?

You can source SKF rotary shaft seals worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the SKF 34256 or other CRW1 seals. We supply genuine SKF components to industrial buyers globally.

How to install an SKF CRW1 rotary shaft seal?

To install an SKF CRW1 seal, ensure the housing bore is clean and free of burrs. Apply a thin layer of lubricant to the seal lip and shaft. Use a seal driver or press to insert the seal squarely into the bore, applying force evenly on the metal case outer diameter. Avoid damaging the nitrile lip or spring during installation.

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 metal cases for smooth bores. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 2.438 in ID, 3.35 in OD, 0.375 in Wd (MPN 24286). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 2.438 in ID, 3.35 in OD, 0.375 in Wd (MPN 24286). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 2.047 in ID, 2.561 in OD, 0.315 in Wd (MPN 20420). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 2.047 in ID, 2.561 in OD, 0.315 in Wd (MPN 20420). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 2.813 in ID, 4.249 in OD, 0.313 in Wd (MPN 28270). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 2.813 in ID, 4.249 in OD, 0.313 in Wd (MPN 28270). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 2 Lip w/Spring, CRWA1, Nitrile, 3.375 in ID, 4.376 in OD, 0.375 in Wd (MPN 33701). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRWA1.
SKF
SKF Rotary Shaft Seal: 2 Lip w/Spring, CRWA1, Nitrile, 3.375 in ID, 4.376 in OD, 0.375 in Wd (MPN 33701). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRWA1.
SKF Rotary Shaft Seal: 2 Lip w/Spring, CRWA1, Nitrile, 2.375 in ID, 3.35 in OD, 0.375 in Wd (MPN 23702). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRWA1.
SKF
SKF Rotary Shaft Seal: 2 Lip w/Spring, CRWA1, Nitrile, 2.375 in ID, 3.35 in OD, 0.375 in Wd (MPN 23702). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRWA1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.234 in ID, 2.25 in OD, 0.25 in Wd (MPN 12590). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.234 in ID, 2.25 in OD, 0.25 in Wd (MPN 12590). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.

More from SKF

View all SKF parts →
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.417 in ID, 2.616 in OD, 0.313 in Wd (MPN 14092). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.417 in ID, 2.616 in OD, 0.313 in Wd (MPN 14092). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.915 in ID, 2.533 in OD, 0.25 in Wd (MPN 19010). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.915 in ID, 2.533 in OD, 0.25 in Wd (MPN 19010). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.893 in ID, 2.434 in OD, 0.25 in Wd (MPN 19000). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.893 in ID, 2.434 in OD, 0.25 in Wd (MPN 19000). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.484 in ID, 2.254 in OD, 0.313 in Wd (MPN 14907). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.484 in ID, 2.254 in OD, 0.313 in Wd (MPN 14907). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 0.75 in ID, 1.124 in OD, 0.188 in Wd (MPN 7414). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 0.75 in ID, 1.124 in OD, 0.188 in Wd (MPN 7414). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Fluoro, 1.969 in ID, 3.543 in OD, 0.315 in Wd (MPN 50X90X8 CRW1 V). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Fluoro, 1.969 in ID, 3.543 in OD, 0.315 in Wd (MPN 50X90X8 CRW1 V). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.175 in ID, 2.031 in OD, 0.5 in Wd (MPN 11553). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.175 in ID, 2.031 in OD, 0.5 in Wd (MPN 11553). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.494 in ID, 2.06 in OD, 0.27 in Wd (MPN 14789). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.
SKF
SKF Rotary Shaft Seal: 1 Lip w/Spring, CRW1, Nitrile, 1.494 in ID, 2.06 in OD, 0.27 in Wd (MPN 14789). Key specifications — System of Measurement: Inch; Brand: SKF; Seal Design: CRW1.