Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Bearings & Bushings |
| Origin | - |
| Material | High-Strength Copper Alloy with Embedded Graphite |
| Product Type | Round Flanged Bushing |
| Lubrication | Self-Lubricating (Oil-Free) |
| Available Sizes | MPTZ30, MPTZ35, MPTZ40, MPTZ50 |
| Inner Diameter Tolerance | H7 Standard |
| Hardness | HB 90 - 120 |
| Max Dynamic Load | 25 N/mm² |
| Operating Temperature | -10°C to +160°C |
| Friction Coefficient | 0.08 - 0.12 (Running) |
| Surface Treatment | Polished Inner Bore |
Anonymous
Mar 03, 2026
Rating: 4/5
Solid performance
Works well in dry conditions. Make sure to follow the press-fit instructions carefully during installation to avoid deformation.
Anonymous
Feb 23, 2026
Rating: 5/5
Excellent for automated machinery
We replaced our standard oil-lubricated bushings with these graphite embedded ones. The reduction in maintenance is significant. No oil leaks anymore.
Anonymous
Feb 17, 2026
Rating: 5/5
Reliable industrial component
Ordered a batch for our production line. Consistency across all units is great. Will order again for the next quarter.
Anonymous
Feb 07, 2026
Rating: 5/5
Solved our friction issue
Running these in a high-load application. The graphite plugs are evenly distributed. Very satisfied with the wear resistance so far.
Anonymous
Feb 05, 2026
Rating: 4/5
Good quality, precise fit
The MPTZ40 model fit our shaft perfectly. Hardness is as described. Took off one star because shipping packaging was slightly damaged, but the product was fine.
Q: What is the recommended shaft tolerance for the MPTZ50 size?
A: We recommend a shaft tolerance of e7 or f7 for optimal running clearance with the H7 bore.
Q: Can these be used in outdoor environments with rain exposure?
A: Yes, the copper alloy offers good corrosion resistance, but we recommend checking specific chemical compatibility for harsh environments.
Q: Do these bushings require any initial grease or oil before installation?
A: No, these are designed to be oil-free. The embedded graphite provides lubrication during operation.
Q: What is the maximum rotational speed these can handle?
A: For continuous operation, we recommend speeds below 0.5 m/s to ensure optimal wear life of the graphite plugs.
Q: Is the flange thickness standard across all sizes?
A: The flange thickness varies slightly depending on the inner diameter model to ensure structural integrity. Please refer to the technical drawing.
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