Worn shaft, journal and keyway rebuilding
Keyway hammering, journal scoring and worn shaft seats leave the press-fit oversized and the journal undersized for its sleeve.
The need for worn shaft, journal and keyway rebuilding
BHI Coatings performs worn shaft, journal and keyway rebuilding across Alvin and the Texas Gulf Coast. Hammered keyways, scored journals, and worn shaft seats leave the press-fit sloppy and the journal undersize for its sleeve or bearing. The shaft runs out of tolerance, and whatever it drives wears in turn. Building it back up with an arc is the obvious fix and the wrong one, because heat distortion on a slender rotor ruins the runout.
How BHI Coatings does worn shaft, journal and keyway rebuilding
BHI Coatings rebuilds journals, keyways, and shaft seats cold with metal composites such as Belzona 1111 and 1131, then machines them back to the specified diameter. The crew preps the worn surface, applies the composite, and turns it to size in our Alvin shop or on site. No arc-weld heat enters the rotor, so there is nothing to chase out afterward.
Typically applied with Belzona 1111, Belzona 1131, matched to the service conditions.
The shaft returns to its specified diameter with the press-fit and the keyway restored. No welding heat went into the rotor, so it stays straight and runs true without a re-machine for distortion.
More Metal Repair applications
Bearing-bore wear, split-line distortion and oil-leak paths at gasket faces retire compressor, engine and gearbox housings before the internals wear out.
Learn more →Crack and hole repair on casings and equipmentWelding on pressure separators and code-stamped vessels triggers re-stamping, stress relief and thermal distortion that can cost more than the defect.
Learn more →General metal-loss rebuilding compositesMetal loss from corrosion, erosion or pitting retires equipment once it reaches a code-trigger thickness, and weld build-up adds heat distortion.
Learn more →Heat exchanger, tube sheet and water box repairDissimilar tube metals set up galvanic corrosion at the tube sheet and water box, attacking the steel around each tube end and opening leak paths.
Learn more →On-site flange face and nozzle insert repairHeat cycling, gasket-witness machining and dropped tools deform flange faces and corrode nozzle sleeves, so the line leaks and stays out of service.
Learn more →Plain bearing, bushing and bearing-housing repairWorn bearing bores, fretted bushing seats and vibration-loosened housings shift the rotating axis and shorten coupling and seal life.
Learn more →All 11 in Metal RepairThe whole capability in one place, with the work grouped.
See the capability →Contact BHI Coatings
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