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PTFE Seal

Commins Crankshaft Oil Seal China Manufacturer
PTFE Seal

Commins Crankshaft Oil Seal China Manufacturer

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  • Commins Crankshaft Oil Seal China Manufacturer
  • Commins Crankshaft Oil Seal China Manufacturer

Description

Product Description

Crankshaft and camshaft seals made of PTFE (teflon)material with low friction design offer high performance and durability.

PTFE /teflon radial shaft seals utilize a polytetrafluoroethylean wafer for dynamic sealing. GOS offers a range of solutions with a bonded PTFE wafer and optional unitized designs.

Features

Excellent chemical and wear resistance

Wide temperature range

Dry running capability

Lower friction and power loss compared to conventional spring loaded seals

One piece robust construction

Reverse PTFE lip 4th generation seal

Special custom designs available, for example plastic bayonet fitting or cassette with wear sleeve

Rubber or felt dust lips available

CUMMINS CRANKSHAFT OIL SEAL
NO. SEAL DIMENSION APPLICATION OEM NUMBER(1) OEM NUMBER(2)
1 63.5×79.5×8 CUMMINS(6BT) 3900709 3904353
2 130×150×14.5 CUMMINS(6BT) 3925529 3909410
3 75×93×8 CUMMINS(6CT) 3921927 3353977
4 130×150×14.5 CUMMINS(6CT) 3933262 3904089/3353978
5 152.5×171×16 CUMMINS(NT85) 3006738 39823
6 152.5×171.5×10.5 CUMMINS(NT85) 3006737
7 42X66.7X12.7 CUMMINS 3020188
8 92×120.8×12 CUMMINS(NT85) 3004317 3020183
9 91×121×12 CUMMINS(NT85) 3006736 39813
10 55×81×11 CUMMINS(NT85) 3020187 3020185/39717
11 55×81×11 CUMMINS(NT85) 3004316
12 41X63.5X6 CUMMINS(NT85) 3038998
13 185×206×13 CUMMINS(K) 3082142 3630681
14 110×140×13 CUMMINS(K) 3016787 3016792
15 55×73×13 CUMMINS(K) 3016788
16 40X54X9.5 CUMMINS(K19) 3016794
17 50X81X11 CUMMINS 3078221
18 95×120.5×12.5 CUMMINS 3010459
19 80×105×12 CUMMINS 3010457
20 45×65×10 CUMMINS 200307
21 48×81×11 CUMMINS 3078292 3412267
22 122×152.5×14.5 CUMMINS 3023867
23 103×127×13 CUMMINS 3020184
24 66X79.5X8 CUMMINS 3922598
25 25X41X8 CUMMINS 3019600
26 28X41X8 CUMMINS SETS 3803894 3161772
27 28X41X8 CUMMINS 3803573
28 45X65X8 CUMMINS 3895034 3803574
29 45X65X8 CUMMINS SETS 3892020 3804304
30 85.5X99.5X5.5 CUMMINS 3804744
31 90X107.5X8 CUMMINS 3895037 3803576
32 166X190X12 CUMMINS 3800968
33 166X190X12 CUMMINS 3800969
34 152.5X171.5X11 CUMMINS 3005885 3005886
35 110X130X12 CUMMINS 3895036
36 72*73*10 CUMMINS 3968562
37 130*150*14 CUMMINS 3968563
38 70*100*12.5/16 CUMMINS 4890832
39 130*150*14 CUMMINS 3968563
40 50.3-65-8/10 CUMMINS 5365266
41 110*125*12/14 CUMMINS 5265267

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What factors influence the performance of industry rubber seals

The sealing effect of the sealing ring is related to the material characteristics of the sealing ring. There is also a close influence on other factors. For example, the speed of rotation, working temperature, working pressure, working medium, etc., today I will tell you about the four factors that affect the sealing performance of the sealing ring.

First, the speed of rotation

  When the rotation speed is very low (< 0.03m/s), it is necessary to consider the smoothness of the operation of the equipment and whether the operational appears "crawling" phenomenon. When the movement speed is very high (> 0.8m/s), the lubricating oil film may be destroyed, and the oil seal is not well lubricated and frictions heat, resulting in greatly reduced life. It is recommended that polyurethane or rubber and plastic oil seal work in the speed range of 0.03m/s ~ 0.8m/s. High-speed oil seals need to put forward higher requirements for structure and material, and the speed of household appliances oil seals can reach 20000rpm. Both wear and temperature resistance need to be met, and the concentricity requirements of dynamic sealing on the installation are relatively high.  

Second, the temperature of the working environment

  Low temperature will reduce the elasticity of rubber and plastic oil seals, resulting in leakage, and even the entire oil seal becomes hard and brittle. High temperature will make the oil seal volume expansion, soft, resulting in the oil seal friction resistance increases rapidly and the pressure resistance decreases. It is recommended that the continuous operating temperature range of ordinary polyurethane or rubber and plastic oil seals be -10 ° C to +80 ° C. For the high temperature and high speed requirements of the working environment, we need to choose to use fluorine rubber and PTFE, high temperature resistance and wear resistance is better, the low temperature environment is generally to -40 degrees, and the rubber performance is tested at high and low temperatures to ensure that the product quality meets the requirements.  

Third, the working pressure of machinery

  The oil seal has a minimum service pressure requirement. Oil seals with low friction and low starting resistance should be selected for low pressure work. Below 2.5MPa, polyurethane oil seal is not suitable; High pressure to consider the oil seal pressure deformation, need to use anti-extrusion stop ring, grooving processing also has special requirements.

Fourth, the working medium

  General sealing media are gasoline, oil, diesel, grease, and some static sealing dust. In addition to selecting the working medium strictly according to the manufacturer's recommendations, it is important to keep the working medium clean. Aging or contamination of the oil will not only cause the components in the system to fail, accelerate the aging and friction of the oil seal, but also the dirt in it may scratch or embed the oil seal, making the seal fail. Therefore, it is necessary to regularly check the quality of the oil and its cleanliness, and replace the oil filter or oil according to the maintenance specifications of the equipment. The air remaining in the oil in the cylinder will be compressed by high pressure, which will cause the oil seal to burn out or even carbonize. In order to avoid this situation, exhaust treatment should be carried out at the initial operation of the hydraulic system. The hydraulic cylinder should also run at low pressure and slow speed for a few minutes to confirm that the residual air in the oil has been drained before it can work normally.