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Rotary Oil Seals

  • DU bush
DU bush

DU bush

  • bushing-DU
  • hydraulic bearing
  • Material:steel+PTFE+bronze/
  • Color:Black or red inside
  • Product description: Bushing DU prifile, inside black or red,stainless steel ptfe bearing bushing DU for hydraulic cylinder
  • INQUIRY

DU bush


The DU bearing is designed in combination with the working principle of the oil cylinder and shock absorber. It is more wear-resistant in the absence of oil, and is especially suitable for occasions with large lateral forces and frequent reciprocating motion.



1. PTFE and lipophilic fiber mixture, 0.01-0.03mm
2. Spherical bronze powder 0.2-0.3mm
3. Steel back 0.7-2.3mm
4. Electroplating layer: tin plating thickness 0.005mm, or copper plating thickness 0.008mm

DU bushing technical data:

Maximum load pressure: 140N/mm2
Applicable temperature range: -195~+280 degrees Celsius
Maximum sliding speed: 3m/s
Friction coefficient: 0.04~0.20
Allow the highest PV value (dry): 3.8N/mm2.m/s
Maximum allowable PV value (oil): 50N/mm2.m/s



DU bush application

1. The mixture of PTFE and lipophilic fiber can form a good transfer film, thereby protecting the grinding shaft during the movement.
2. Good wear resistance and low friction coefficient.
3. Good running performance, no shaft bite.
4. Can be used for rotation, swing, reciprocating motion.
5. Because it does not contain lead, it can be used in food machinery, medical machinery and other green environmental protection equipment.
6. Also especially suitable for occasions with frequent reciprocating motion and large lateral force. Suitable for cars,Motorcycle shock absorbers and various types of hydraulic cylinders.


Bush dimensions



Below dimensions are standard sizes,non-standard sizes available.

Please request if required.


d*D*L (mm) d*D*L (mm) d*D*L (mm) d*D*L (mm) d*D*L (mm) d*D*L (mm)
6*8*6 12*14*6 15*17*10 18*20*12 22*25*25 28*32*15
6*8*8 12*14*8 15*17*12 18*20*15 22*25*30 28*32*20
6*8*10 12*14*10 15*17*15 18*20*20 24*27*15 28*32*25
8*10*6 12*14*12 15*17*20 18*20*25 24*27*20 28*32*30
8*10*8 12*14*14 15*17*25 20*23*10 24*27*25 28*32*40
8*10*10 12*14*15 16*18*10 20*23*12 24*27*30 30*34*12
8*10*12 12*14*20 16*18*12 20*23*15 25*28*10 30*34*15
8*10*15 12*14*25 16*18*15 20*23*20 25*28*12 30*34*20
10*12*6 13*15*10 16*18*20 20*23*25 25*28*15 30*34*25
10*12*8 13*15*20 16*18*25 20*23*30 25*28*20 30*34*30
10*12*10 14*16*10 17*19*10 22*25*10 25*28*25 30*34*40
10*12*12 14*16*12 17*19*12 22*25*12 25*28*30 32*36*20
10*12*14 14*16*15 17*19*20 22*25*15 25*28*40 32*36*30
10*12*15 14*16*20 18*20*10 22*25*20 25*28*50 32*36*40
d*D*L (mm) d*D*L (mm)
35*39*12 80*85*100
35*39*15 85*90*40
35*39*20 85*90*60
35*39*25 85*90*80
35*39*30 85*90*100
35*39*40 90*95*40
35*39*50 90*95*50
38*42*15 90*95*60
38*42*30 90*95*80
38*42*40 90*95*100
40*44*12 100*105*50
40*44*20 100*105*60
40*44*25 100*105*80
40*44*30 100*105*115
40*44*40 105*110*60
40*44*50 105*110*80
45*50*20 105*110*115
45*50*25 110*115*60
45*50*30 110*115*80
45*50*40 110*115*115
45*50*50 120*125*60
50*55*20 120*125*80
50*55*30 120*125*115
50*55*40 125*130*60
50*55*50 125*130*100
50*55*60 125*130*115
55*60*30 130*135*60
55*60*40 130*135*80
55*60*50 130*135*100
55*60*60 140*135*60
60*65*30 140*135*80
60*65*40 140*135*100
60*65*50 150*135*60
60*65*60 150*135*80
60*65*70 150*135*100
65*70*30 160*135*60
65*70*40 160*135*80
65*70*50 160*135*100
65*70*60 160*135*115
65*70*70 180*185*80
70*75*40 180*185*100
70*75*50 190*195*80
70*75*60 190*195*100
70*75*70 200*205*60
70*75*80 200*205*80
75*80*30 200*205*100
75*80*40 220*225*80
75*80*50 220*225*100
75*80*60 250*255*80
75*80*70 250*255*100
75*80*80 260*265*80
80*85*40 260*065*100
80*85*50 280*285*80
80*85*60 280*285*100
80*85*70 300*305*80
80*85*80 300*305*100