Rudder Stock Bearing • Neck Bearing • Pintle Wear • Diametral Clearance • Bearing Pressure • Rudder Torque • Hydraulic Steering Capacity
Ship Rudder Stock Bearing Clearance, Pintle Wear & Steering Load Tool
Turn drydock rudder measurements into a structured engineering screen. Simple mode compares upper-bearing and pintle clearances with vessel-specific limits, projects pintle wear, and checks measured steering torque against rated capacity. Advanced mode adds a multi-bearing survey register, wear trending, bearing pressure, hydrodynamic rudder-load screening, hydraulic steering capacity, steering-time checks and repair priorities.
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Fast rudder condition screen: 10 inputs.Use the vessel drawing, bearing maker, repair specification or class-approved limit for maximum allowable service clearance. The tool does not substitute a generic renewal limit.ClearanceUpper bearing & pintle utilization
WearPintle growth rate & remaining life
SteeringMeasured torque reserve
Current Survey Measurements
Current diametral clearance, mm.
Vessel / maker / class-approved service limit, mm.
Current maximum diametral clearance, mm.
Service / renewal threshold, mm.
Previous comparable measurement, mm.
mm, for normalized wear indication.
mm, used for L/D screening.
kN·m.
kN·m from approved maker / vessel documentation.
Rudder Hydrodynamic Load Screen
m².
knots.
kg/m³.
User-entered design / analysis coefficient.
m.
User-entered screening multiplier.
Steering Gear Capacity
kN·m.
kN·m.
bar.
mm.
Use the effective number contributing force in the selected geometry.
m, effective perpendicular moment arm.
%.
s, measured selected sweep.
s, enter the vessel's applicable statutory / approved criterion.
Rudder Bearing / Pintle Survey Register
Enter measured clearances in both fore-aft and port-starboard directions where available. Current condition uses the larger reading. Bearing pressure uses the entered reaction from an approved calculation or other engineering basis; the tool does not infer reaction distribution from rudder force.
| Use | Location | Material | Journal Ø mm | Bearing L mm | As-new clr mm | Previous clr mm | Months | Current F-A mm | Current P-S mm | Max allowable mm | Reaction kN | Allowable pressure N/mm² |
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Survey / Repair Checks
Engineering boundary: this tool is a condition and load screen. It does not establish class acceptance, bearing renewal limits, rudder-stock strength, steering-gear certification or fitness for service. Bearing material, swelling, alignment, approved drawings, service history, class rules and maker instructions remain controlling.