Allowable load / LPV value of plastic (or sintered) plain bearings

Two independent checks for a plastic or sintered-bronze plain bearing: the contact temperature rise for a given load and sliding speed, and the maximum allowable load for a given permissible temperature rise (limiting pressure-velocity, LPV).

✓ validated against legacyoriginal: /calculators/e3_11.htm

Allowable load / LPV value of plastic (or sintered) plain bearings — original diagram from /calculators/e3_11.htm

Bearing width, L (temperature check)mmBearing diameter, D (temperature check)mmLoad, F (temperature check)NSliding velocity, V (temperature check)m/sCoefficient of friction, µ (temperature check)Thermal resistance to ambient, R (temperature check)K/WBearing width, L (max. load check)mmBearing diameter, D (max. load check)mmMaximum allowable temperature rise, ΔT_max°CSliding velocity, V (max. load check)m/sCoefficient of friction, µ (max. load check)Thermal resistance to ambient, R (max. load check)K/W

Contact temperature rise, ΔT75 °C

PV value0.1 1e6 Pa·m/s

Maximum allowable load, F_max80 N

Limiting PV value, LPV0.1 1e6 Pa·m/s

Method & references

Limiting pressure-velocity (LPV) value of plastic/sintered plain bearings, from a lumped thermal-resistance model of the contact (ΔT = R·µ·F·V).

The computation is a literal port of the original client-side JavaScript from /calculators/e3_11.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.

Allowable load / LPV value of plastic (or sintered) plain bearings — Engineering ABC