Overview
The SKF 17645 is a Chicago Rawhide (SKF) radial shaft seal designed for general industrial applications requiring reliable fluid retention and contaminant exclusion. This joint radial oil seal combines proven CRWHA1 geometry with quality materials to deliver extended service life in power transmission equipment, gearboxes, bearings, and rotating machinery. The solid case construction and dual-lip design make the SKF 17645 a trusted choice for maintenance and OEM replacement scenarios.
Key Features
- Double-Lip Design: Dual nitrile rubber lips with garter spring provide superior sealing performance and extended life compared to single-lip configurations.
- Nitrile Rubber (NBR) Material: Compatible with mineral oils, synthetic oils, and many industrial fluids; resistant to temperature extremes and oxidation.
- CRWHA1 Geometry: Industry-standard design proven in millions of installations across heavy equipment, compressors, pumps, and industrial drives.
- Solid Steel Case: Pressed steel housing ensures accurate bore fit and prevents case migration during operation.
- Garter Spring: Carbon steel spring maintains consistent lip pressure and dynamic sealing under varying shaft speeds and loads.
- Compact Profile: Low overall width (0.375″) facilitates installation in space-constrained applications without design modification.
Technical Specifications
- Shaft Diameter: 1.750 inches
- Housing Bore Diameter (OD): 2.875 inches
- Overall Width: 0.375 inches
- Number of Lips: 2 (double-lip)
- Lip Material: Nitrile Rubber (NBR)
- Spring Type: Garter spring
- Spring Material: Carbon steel
- Case Material: Steel
- Design Type: Solid (not split)
- Lubricant Compatibility: Oil or grease
- Installation Method: Housing press fit
- Equivalent Dimension Format: 1.75 x 2.875 x 0.375
- Part Number Variants: 17645, CRWHA1 R
Typical Applications
The SKF 17645 radial oil seal is suitable for a wide range of industrial rotating equipment:
- Industrial gearboxes and speed reducers
- Bearing housings and pillow blocks
- Rotary pumps, blowers, and compressors
- Agricultural and construction machinery
- Conveyor systems and power transmission drives
- Industrial motors and electric drive shafts
- Hydraulic and pneumatic equipment housings
Compatibility & Replacements
Compatible With
- Oil-lubricated and grease-lubricated environments
- Rotating shafts in standard bearing housings
- Industrial gearboxes with standard bore configurations
- OEM factory equipment and retrofit applications
- Mineral oil, synthetic oil, and many industrial fluids
Replaces / Drop-In Replacement For
- Chicago Rawhide (CR) 17645 (OEM equivalent)
- CR CRWHA1 design seals (dimensional equivalent)
- SKF radial shaft seals in 1.75″ x 2.875″ x 0.375″ configuration
Works With
- Standard metric and inch-dimension bearing systems
- Press-fit housing installations (standard mechanical assembly)
- Oil-circulation lubrication systems
- Sealed and open bearing housings
- Industrial predictive maintenance programs (monitoring shaft wear)
