(03) 9464 2950 info@thyssing.com.au

Metal-Polymer Bearings

DU®

Metal-Polymer Anti-Friction Plain Bearings

CHARACTERISTICS

  • DU self-lubricating bushings offer very good wear and low friction performance over a wide range of loads, speeds and temperatures in dry running conditions
  • Bushing material suitable for lubricated applications
  • Anti-friction bearing suitable for linear, oscillating and rotating movements
  • Approved to standard FAR 25.853 and FAR 25.855 – Federal Aviation Regulations – making it suitable for interior aircraft applications

Bearing forms available in standard dimensions

Cylindrical bushes                        Flanged bushes

Thrust washers                             Flanged washers

Sliding plates

Bearing forms made to order: cylindrical bushes with non-standard lengths and wall thickness, flanged bearings, hexagonal and square bores, liner on outer diameter, customized bearing designs

STRUCTURE AND COMPOSITION

Metal-Polymer Composite Self-lubricating Bushing Material
Steel Back + Porous Bronze Sinter + PTFE + Lead

 

MICROSECTION

du-bush-microsection

OPERATING PERFORMANCE
Dry Very Good
Oil lubricated Good
Grease lubricated Fair
Water lubricated Fair
Process fluid lubricated Fair
FOR SUPERIOR / LEAD-FREE PERFORMANCE
Dry DP4 / DP11
Oil lubricated DP4 / DP31
Grease lubricated DP4 / DX
Water lubricated DP4-B
Process fluid lubricated DP4 / DP31

     BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

N/mm2

N/mm2

250

140

Operating temperature

Min

Max

°C

°C

– 200

280

Coefficient of linear thermal expansion

Parallel to the surface

Normal to the surface

10-6/K

 

10-6/K

11

 

30

DRY      
Maximum sliding speed, U   m/s

2.5

Maximum pU factor   N/mm2 x m/s 1.8
Coefficient of friction    

0.02 – 0.25 *

OIL LUBRICATED      
Maximum sliding speed, U   m/s

5.0

Maximum pU factor   N/mm2 x m/s

5.0

Coefficient of friction    

0.02 – 0.12

RECOMMENDATIONS      
Shaft surface roughness, Ra

Dry

Lubricated

µm

µm

0.3 – 0.5

 0.05 – 0.4 *

Shaft surface hardness Unhardened acceptable, improved bearing life > 200HB  

* Depending on operating conditions 

   BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

psi

psi

36 000

20 000

Operating temperature

Min

Max

°F

°F

– 328

536

Coefficient of linear thermal expansion

Parallel to the surface

10-6/F

6

Normal to the surface 10-6/F 17
DRY      
Maximum sliding speed, U   fpm

500

Maximum pU factor  

psi x fpm

50 000

Coefficient of friction    

0.02 – 0.25 *

OIL LUBRICATED      
Maximum sliding speed, U   fpm

1 000

Maximum pU factor   psi x fpm

143 000

Coefficient of friction    

0.02 – 0.12

RECOMMENDATIONS      

Shaft surface roughness, Ra

Dry

Lubricated

µin

µin

12 – 20

≤ 2 – 16 *

Shaft surface hardness

Unhardened acceptable, improved bearing life > 200HB

 

* Depending on operating conditions

TYPICAL INDUSTRY APPLICATIONS

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Custom Lengths Available

Thyssing can supply custom lengths upto 410mm long free of charge.

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Metric and Imperial Sizes

Both Metric and Imperial sizes are available to achieve the design requirements.

Australian Stock

Thyssing keep a wide range of stock here in Australia to reduce lead time for customers.

Low Maintenance

Garmax Bushes are Self lubricating so you can save time and money on maintenance.

We're here to help!

Please do not hesitate to contact us with any design enquiries. Our experienced engineers are ready to help you with any enquiries and are willing to assist you with support to make sure you get the right product for your application.

Phone

(03) 9464 2950

Address

33 Nevin Drive, Thomastown VIC 3074

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Office Hours

M-F: 9AM - 5PM

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