Crankshaft Rear Oil Seal 4936646 for Qsb Diesel Engine Part for Cummins O Ring 3914761 3920147 3909411 4955372

• Customization: Available
• Material: NBR
• Usage: Engine, Transmission, Rear Axle, Crankshaft Seal
• Model NO.: 4936646
• Type: Assembled
• Speed: Speed
• Pressure: Atmospheric Type
• Lip: Single Lip
• Standard: Standard
• Engine Model: 6b 6c
• Model Number: Oil Seal 3925529
• Material Type: NBR PTFE
• Oil Seal Feature: High Temperature Resistance
• Certifications: ISO9001/Ts16949
• OEM/ODM: Yes
• Oil Seal Packing: PE Bags Then Cartons
• Transport Package: Oil Seal PE Bag Then Cartons
• Specification: 130X150X14.5 mm
• Trademark: HuaCan
• Origin: China
• HS Code: 4016931000
• Production Capacity: 1000 PCS Per Month
• Package Size: 15.00cm * 15.00cm * 3.00cm
• Package Gross Weight: 0.200kg

Product Description

Product Description

 

Product Name	Crankshaft Rear Oil Seal
Part Number	3925529/3970548
MOQ	1 PC
Engine model	6B/6C
Warranty	6 Months
Package	According to customers' request
Application	Construction machinery/ Marine vessel/ Heavy duty truck/ Generator set
After-service	Strict testing before shipment; Follow up the customer's feedback remote online service.

An oil seal, also known as a grease seal or shaft seal, is a mechanical device used to prevent the leakage of oil or other lubricants from a machine or mechanism. Here is a detailed introduction:

Structure and Components

 

• Lip: The most crucial part of the oil seal. It is usually made of elastomeric materials like nitrile rubber, fluorocarbon rubber, or silicone rubber. The lip comes into direct contact with the rotating shaft, forming a sealing interface to prevent oil leakage.
• Spring: Most oil seals have a small spring around the lip. The spring provides the necessary tension to keep the lip in close contact with the shaft, ensuring a tight seal even under varying operating conditions.
• Metal Case or Housing: The metal case provides structural support for the seal and helps to install the seal in the housing or bore. It is often made of steel or aluminum and is designed to fit precisely into the designated mounting location.

Working Principles

 

• Sealing Mechanism: The primary function of an oil seal is to create a barrier that prevents oil from escaping the sealed area. The lip of the oil seal presses against the surface of the rotating shaft, forming a narrow gap or contact zone. This contact creates a high-pressure region that resists the outward flow of oil.
• Lubrication and Wear Resistance: While the oil seal's main purpose is to prevent oil leakage, it also needs to allow the shaft to rotate smoothly with minimal friction. To achieve this, a thin film of oil is maintained between the lip and the shaft. This oil film provides lubrication, reducing wear and tear on both the seal and the shaft.

Applications

 

• Automotive Industry: In engines, oil seals are used to seal the crankshaft, camshaft, and transmission shafts. They prevent oil from leaking out of the engine and transmission, ensuring proper lubrication and preventing damage to internal components. In automotive differentials and wheel hubs, oil seals play a vital role in keeping the lubricating oil inside and preventing contaminants from entering.
• Industrial Machinery: In pumps and compressors, oil seals are used to seal the rotating shafts that connect the motor to the pump or compressor mechanism. In gearboxes and reducers, oil seals prevent oil leakage from the gear chambers, maintaining the proper lubrication environment for the gears and bearings.
• Marine Applications: In marine engines and propeller shafts, oil seals are used to prevent oil leakage into the water and to keep seawater from entering the engine or transmission.