A journal or trunnion is a cylindrical rotating shaft component that supports radial loads and enables smooth rotation in industrial machinery.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Max RPM | 3000 | |
| Straightness | 0.01 mm/m | |
| Load Capacity | Dynamic: 15 kN, Static: 25 kN | |
| Hardness Depth | 1.5-2.0 mm | |
| Surface Finish | Ra 0.4 μm max | |
| Lubrication Type | Oil bath or grease packed | |
| Diameter Tolerance | ±0.005 mm |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
A practical evidence checklist for RFQ preparation and supplier evaluation.
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Manufacturer profiles associated with Journal/Trunnion.
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While often used interchangeably, 'journal' typically refers to the rotating part of a plain bearing system, while 'trunnion' specifically describes a short shaft or pivot point that supports and allows rotation of a larger assembly. In Cross Spider machines, the component serves both functions.
Regular visual inspections every 500 operating hours, with dimensional checks every 2000 hours. Lubrication condition should be monitored continuously through temperature and vibration sensors.
Primary failures include wear from inadequate lubrication, scoring from contamination, fatigue cracking from cyclic loading, and corrosion from environmental exposure.
Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.