Crankshaft rear oil seal 50*70*8
Attributes:
Material: NBR/FKM
Brand: DTO
Package: Customizable packaging, customized product LOGO
Description
Type: TC oil seal
Material: NBR/FKM
Temperature: 40~120℃, FKM (-20~280℃)
Color: black, brown
Origin: China
Application: automobile, motorcycle crankshaft camshaft, differential, shock absorber, engine, axle, front and rear wheels
Product Overview
The Crankshaft Rear Oil Seal 50x70x8, also known as TC Oil Seal 50x70x8, from Dingtong is a high-precision double lip rotary shaft seal designed specifically for automotive crankshaft applications. Its reinforced metal housing and dual-lip elastomer design ensure superior oil retention and dust protection under continuous rotation.
This seal is widely used by OEMs, automotive component suppliers, and industrial maintenance companies requiring consistent performance and reliable bulk supply.

Key Specifications
| Parameter | Description |
|---|---|
| Product Type | Crankshaft Rear Oil Seal / TC Oil Seal |
| Size (ID × OD × Width) | 50 × 70 × 8 mm |
| Shaft Type | Rotating Shaft |
| Sealing Medium | Lubricating Oil |
| Max Pressure | ≤ 0.03 MPa |
| Housing Material | Carbon Steel (Optional Stainless Steel) |
| Lip Structure | Primary Oil Lip + Secondary Dust Lip |
| Spring Material | Stainless Steel |
| Operating Temperature | Depends on Material |
| Brand | Dingtong |
Material Options
Dingtong offers multiple elastomer materials to meet diverse operational environments:
| Material | Features | Typical Applications |
|---|---|---|
| NBR | Excellent oil resistance, cost-effective | Standard automotive engines, industrial motors |
| FKM (Viton) | High-temperature and chemical resistance | High-performance engines, heavy-duty vehicles |
| ACM | Heat and oil resistant | Transmissions, hydraulic systems |
| VMQ (Silicone) | Excellent low-temperature flexibility | Cold environment applications |
Custom material formulations are available for OEM projects requiring specific performance characteristics.
Structural Design Advantages
The TC Oil Seal 50x70x8 integrates a reinforced steel housing with a dual-lip design for optimal sealing:
Precision-machined steel case for secure fitting
Dual sealing lips provide oil retention and dust protection
Balanced garter spring maintains consistent radial pressure
Optimized lip geometry reduces friction and shaft wear
High bonding strength between rubber and metal ensures long service life
This design ensures stable operation in automotive crankshaft and other high-rotation applications.
Performance Characteristics
Dingtong oil seals undergo strict quality control for consistency and durability:
Reliable sealing under continuous rotation and engine vibration
Low friction torque, minimizing energy loss
Reduced shaft wear and heat generation
Stable performance under varying speeds and temperatures
Resistant to oil aging and elastomer deformation
All products are inspected and tested before shipment.
Typical Applications
The Crankshaft Rear Oil Seal 50x70x8 / TC Oil Seal 50x70x8 is commonly applied in:
Automotive engine crankshafts
Gearbox shafts
Small industrial motors
Pumps and compressors
Power tools
Household appliances requiring rotary sealing
Suitable for both OEM production lines and aftermarket replacements.
Manufacturing & Quality Control
Dingtong operates integrated production facilities covering molding, vulcanization, trimming, and final inspection:
Incoming material verification
Mold accuracy and repeatability control
Automated dimensional inspection
Dynamic sealing performance testing
Batch traceability
Durability and leakage testing
Engineering reports and technical documentation are available for project buyers.
OEM & Bulk Supply Capability
For customers with high-volume requirements, Dingtong provides:
Private labeling and custom packaging
Custom dimension development
Material or performance enhancements
Sample production for pre-approval
Long-term supply planning and contracts
We support bulk procurement, framework agreements, and recurring supply schedules.
Packaging & Logistics
Dingtong offers flexible packaging solutions for safe international delivery:
Standard cartons with internal protection
Palletized shipment
Customer-branded cartons
Batch labeling and barcodes
Optimized container loading
Reliable inventory management ensures timely delivery.
Why Choose Dingtong
Specialized manufacturer of oil seals for automotive and industrial applications
Stable production capacity suitable for bulk supply
Competitive factory pricing
Strict quality consistency control
Professional OEM and technical support
Global export experience
Long-term supply and after-sales service
Ordering Information
To request a quote or place a bulk order, please provide:
Quantity required
Material selection
Application environment
Annual demand estimate
Delivery schedule
Dingtong will provide optimized solutions, technical datasheets, and competitive pricing.
Frequently Asked Questions
Q1: Is this seal suitable for high-speed crankshaft applications?
Yes. Optimized dual-lip design and balanced spring ensure stable sealing under high-speed rotation.
Q2: Can custom materials be provided?
Yes. NBR, FKM, ACM, VMQ and custom formulations are available based on temperature, oil type, and chemical exposure.
Q3: Do you support OEM contracts and bulk supply?
Yes. Dingtong supports long-term supply and framework agreements.
Q4: How long is the typical lead time?
Standard lead time is 15–25 days, depending on order volume and customization.
Q5: Are samples available for testing?
Yes. Samples can be provided for pre-approval before mass production.
Contact Dingtong for Bulk Procurement
Looking for a reliable supplier of Crankshaft Rear Oil Seal 50x70x8 / TC Oil Seal 50x70x8?
Dingtong provides high-quality seals, stable production capacity, and professional technical support tailored for OEM, industrial, and aftermarket buyers.
Contact us today for technical datasheets, pricing, and custom supply solutions.