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OIL SEAL CR CR-31870 3.188X4.631X0.438 SYN NBR Price | Heavy Duty Synthetic NBR Rotary Shaft Seal
CR oil seal CR-31870 3.188x4.631x0.438 SYN NBR is a heavy-duty rotary shaft oil seal designed for industrial gearboxes, pumps, motors, agricultural machinery, mining equipment, and imported machinery. Manufactured using synthetic NBR rubber with a reinforced metal construction, this seal provides excellent oil retention, contamination protection, and long service life in demanding industrial environments.
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The CR Oil Seal CR-31870 3.188x4.631x0.438 SYN NBR is a premium rotary shaft seal engineered for industrial applications requiring dependable sealing performance and durability.
The SYN NBR (Synthetic Nitrile Rubber) sealing element offers excellent resistance to mineral oils, lubricants, hydraulic fluids, and grease while maintaining flexibility and sealing efficiency during continuous operation.
Designed with a reinforced metal case construction, the seal maintains dimensional stability and secure housing retention, making it ideal for heavy-duty industrial applications where vibration, load variation, and continuous operation are common.
The 3.188 x 4.631 x 0.438 inch size is commonly found in industrial gearboxes, conveyors, pumps, compressors, agricultural equipment, mining machinery, and imported inch-size equipment requiring reliable shaft sealing performance.
⚙️ Applications
- Industrial gearbox
- Hydraulic pump
- Electric motor
- Air compressor
- Mining equipment
- Agricultural machinery
- Conveyor systems
- Heavy-duty rotating equipment
🎯 Benefits
✔ Prevent lubricant leakage
✔ Protect against dust and contamination
✔ Extend bearing and shaft life
✔ Reduce downtime
✔ Lower maintenance costs
✔ Improve equipment reliability
🧠 Technical Insight
- SYN NBR offers excellent oil resistance
- Metal case construction improves stability
- Suitable for oil and grease lubrication
- Designed for continuous rotary applications
- Suitable for demanding industrial environments
✅ Key Features
- Synthetic NBR Sealing Material
- Heavy-Duty Industrial Construction
- Excellent Oil & Grease Resistance
- Metal Reinforced Structure
- OEM Replacement Ready
- Long Service Life
📊 Specifications
Brand: CR (Chicago Rawhide)
Part Number: CR-31870
Model: SYN
Size: 3.188 x 4.631 x 0.438 inch
Type: Rotary Shaft Oil Seal
Material: Synthetic NBR (Nitrile Rubber)
Outer Case: Steel
Shaft Diameter (ID): 3.188 inch
Housing Diameter (OD): 4.631 inch
Width: 0.438 inch
🔁 Equivalent
Suitable replacement for:
SKF / National / NOK / KACO / CFW / Corteco / Simrit / Garlock
(Always verify dimensions and seal profile before ordering.)
📦 Availability
✅ In Stock
🚚 Fast Delivery Available
📦 MOQ: 1 Piece
📲 Contact via LINE ID: dusitrea
🏭 Suitable for industrial maintenance and OEM replacement
CR-31870 | 3.188X4.631X0.438-SYN-NBR
Data sheet
- Indent (I.D.) - inch
- Outdent (O.D.) - inch
- Thinkness - inch
- Material
- NBR
- Cover Material
- CARBON STEEL
- Standard Type
- TCN/TCV
- Brand
- CR-SWEDEN
- Item Condition
- New
Specific References
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CR oil seal CR-31870 3.188x4.631x0.438 SYN NBR is a heavy-duty rotary shaft oil seal designed for industrial gearboxes, pumps, motors, agricultural machinery, mining equipment, and imported machinery. Manufactured using synthetic NBR rubber with a reinforced metal construction, this seal provides excellent oil retention, contamination protection, and long service life in demanding industrial environments.