Metal-Polymer Bearings
DP4®
Metal-Polymer Low Friction Plain Bearings
CHARACTERISTICS
- DP4 low friction bushings offer good wear and low friction performance over a wide range of loads, speeds and temperatures in dry running conditions
- Very good performance in lubricated applications
- Good performance in greased applications
- Suitable for linear, oscillating and rotating movements
- Lead-free material compliant to EVL, WEEE, and RoHS specifications
- Approved to standard DIN EN 1797: 2002-02 and ISO 21010: 2004-04 (Cryogenic Vessels – Gas/Material Compatibility) for piping, valves, fittings and other components in both gaseous and liquid oxygen for up to maximum temperature of 60°C and oxygen pressure of 25 bars. Contact GGB for further details.
- 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 
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 Bushing Material 
Steel back + Porous Bronze Sinter + PTFE + Fillers
MICROSECTION
| OPERATING PERFORMANCE | |
| Dry | Poor |
| Oil lubricated | Good |
| Grease lubricated | Very Good |
| Water lubricated | Poor |
| Process fluid lubricated | Poor |
| FOR SUPERIOR PERFORMANCE | |
| Dry | GAR-MAX / HSG / GAR-FIL / MLG |
| Water lubricated | HPM / HPF / DP4-B |
| Process fluid lubricated | DP4 / HI-EX / GAR-FIL |
DX® bearing material is known by various names such as DX or DXR. Buying a DX® bearing from GGB or its authorized distributors guarantees that you do not receive a counterfeit product.
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 |
10-6/K |
11 |
| Normal to the surface | 10-6/K | 30 |
| DRY | |||
| Maximum sliding speed, U | m/s |
2.5 |
|
| Maximum pU factor |
N/mm2 x m/s |
1.0 |
|
| Coefficient of friction |
0.04 – 0.25 * |
| OIL LUBRICATED | |||
| Maximum sliding speed, U | m/s |
5.0 |
|
| Maximum pU factor | N/mm2 x m/s |
10.0 |
|
| Coefficient of friction |
0.02 – 0.08 |
| 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 |
29 000 |
|
| Coefficient of friction |
0.04 – 0.25 * |
| OIL LUBRICATED | |||
| Maximum sliding speed, U | fpm |
1 000 |
|
| Maximum pU factor | psi x fpm |
286 000 |
|
| Coefficient of friction |
0.02 – 0.08 |
| 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.