Sourced and supplied across Saudi Arabia
A plain bushing has no rolling elements, so it is quiet, tolerant of shock and dirt, and cheap — and it is specified on a completely different basis from a rolling bearing. The governing figure is PV: the contact pressure multiplied by the sliding velocity, which is what the material can survive continuously. A material with a high pressure rating may still be unsuitable at speed, and this is why a bushing that works on a slow-moving pin fails on a fast-rotating shaft at the same load. The second thing that matters is the fit. Most bushings are an interference fit in the housing and close down when pressed in, so the finished bore is smaller than the free bore, and a bushing installed without allowing for that seizes on assembly. Then say whether it must run dry, because a self-lubricating composite exists precisely for pivots and linkages nobody will ever grease again.
The more of this you send, the closer the first quotation lands.
| Bore, outside diameter and length | Free dimensions, and the housing bore they press into |
|---|---|
| Load | Contact pressure, or the load and projected bearing area |
| Motion | Continuous rotation, oscillation, or occasional pivot movement |
| Sliding velocity | With the load, this gives the PV the material must survive |
| Lubrication | Greased, oil-fed, or must run dry |
| Material | Bronze, sintered bronze, PTFE-lined steel or polymer composite |
| Operating temperature | Polymer materials have real temperature limits |
| Environment | Dust, water, seawater or chemical exposure |
| Fit allowance | The bore closes on pressing — state the finished bore required |
| Flange | Plain sleeve, or flanged where an axial face is also loaded |
| Machining | State if supplied finished or to be reamed after fitting |
| Quantity | Units per size, and whether spares are wanted |
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We source to specification. Send your requirement and we will come back with options, lead time and pricing.