14-Step Crankshaft Process

We have expanded our services to include
diesel crankshaft grinding and repair for chrankshafts up to 120 inches in length, which includes the D-399 Cat.

We offer a unique repair process that has been proven to actually strengthen a crankshaft after is has been repaired. We have combined our camshaft experience with the knowledge gained by employees originally trained in crankshaft facilities.

Step 1:

Crank cleaned by submerging in hot tank solution and all oil holes blasted with high pressure.

Step 2:

All crankshafts thoroughly checked using Magnetic Particle Inspection (Magnaflux).

Step 3:

Two different Rockwell Hardness methods performed on all crankshafts.

Step 4:

Crankshafts preheated to prevent stress during straightening process.

Step 5:

Damaged rod or main journal pre-ground before welding process.

Step 6:

Nitrite test performed to determine proper welding process.

Step 7:

Special wire used to weld radius areas to a 30 Rockwell Hardness.

Step 8:

Main or rod journal welded with proper wire, normally 47 to 50 Rockwell Hardness on induction hardened steel crankshafts.

Step 9:

Crankshaft immediately re-straightened before rough grinding.

Step 10:

Crankshaft rough ground and then magnafluxed again.

Step 11:

Crankshafts stress-relieved in an oven for pre-determined time and temperature, based on size of crankshaft.

Step 12:

Crankshaft then finish ground and magnafluxed for third time and then demagnetized.

Step 13:

All Crankshafts micro-polished to manufacturer's recommended RA finish.

Step 14:

Rust inhibitor applied to all crankshafts and packaged in wooden box.