JP Engineering induction hardens all crank sprockets for all chain sets,
crank gears for full steel timing gear sets and oil pump drive gears. Induction
hardening is used to improve tooth life of gears and sprockets as well as
pre-work hardening gears and sprockets before they are installed onto engines.
What is induction hardening?
Induction hardening is a process where steel is hardened by means of induction
heating and subsequent quenching in water.
Why induction harden?
Advantages of induction hardening gear and sprocket teeth include:
1. Localised hardening of tooth surfaces where hardness is needed. Unlike
case hardening which places a hard case around the entire surface of the
part being hardened, induction hardening only hardens the area near the
applicator coil which means that sprockets and gears will have hard teeth
and not hard bores which can prematurely wear crankshafts.
2. Hardened teeth are pre-work hardened. The process of induction hardening
simulates work hardening in the engine. This means that the sprocket or
gear is ready to be used without the wait of the normal work hardening period.
3. Speed of hardening. Induction hardening is a rapid process. It takes
approximately 30 seconds for a rod of parts to be completed.
4. Depth of hardness is easily controlled. Since the process is computer
controlled the depth of hardness is always the same and is easy to control.
How does it work?
Induction hardening works by placing the part to be hardened inside an "applicator"
coil of one or more turns, through which alternating current is passed.
The coil, which in the case of gears and sprockets is round, is usually
made of copper tubing which has water passing through it to prevent the
coil from overheating. The piece to be hardened is rotated within the applicator
coil. At JP Engineering multiple pieces are hardened at the same time by
placing the sprockets or gears onto a rod and then rotating the rod, heating
the parts and then feeding the rod downward into the quench water.
The hardening process in action.
Who else uses induction hardening?
JP Engineering are the only manufacturers of induction hardened sprockets
and gears in Australia for the automotive aftermarket. Other companies that
use induction hardened sprockets and gears include GM, Ford and Edelbrock.