TREATMENT
Your crankshaft goes through several treatment stages prior to plating: straightening, welding, heat treating, pre-grinding, shot peening and several examinations.

Straightening
If necessary, the shaft is straightened by peening, shot peening or both. High spots in the shafts are gauged and removed through this peening. Crankshafts that are excessively bent are heated to 650 F and straightened while hot.

Welding
If journals are burned out and reveal cracks, these will be repaired by submerged arc welding. Each radius, stress point, thrust face and journal is carefully examined. Each crack is ground away and welded. We do not weld over cracks no matter how tiny.

Heat Treating
Coastal Plating heat treats the crankshaft to relieve any stress that exists in the forging. The crankshaft is baked in our annealing oven at steady temperature for a pre-set period of several hours.

Pre-Grinding
Here each bearing surface is pre-ground in preparation for the chrome plating process.

Shot Peening
All crankshafts are peened whether welded or not. That is, welded shafts are shot peened TWICE. This realigns the molecular structure and improves the tensile, fatigue and heat strength of the forging. The shaft is cleaned of any contaminants. It then goes to be chrome plated.

LARGE CRANKSHAFTS. BECAUSE OF THE SPECIAL NEED AND TENSIONS OF THE LARGE SHAFTS UP TO 28 FEET IN LENGTH COASTAL PLATING HAS DEVELOPED ROTATING SUPPORTS WHICH ASSURE THAT NO MATTER WHAT SIZE, WEIGHT OR CONFIGURATION THE CRANKSHAFT WILL BE RESTORED TO THE ORIGINAL O.E.M. STANDARDS.