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
| 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
Agriculture
Agriculture
Agriculture
Agriculture
Custom Lengths Available
Thyssing can supply custom lengths upto 410mm long free of charge.
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.
Address
33 Nevin Drive, Thomastown VIC 3074
Office Hours
M-F: 9AM - 5PM
Phone
(03) 9464 2950
Contact Us
Fill out the below contact form and our team will be in touch with your to assist with your enquiry.