More than
5 Decades Of
Proven Results

If a journal has been excessively worn or “Burned Out” all the hardness is gone. It may be ground to an undersize but that softness often limits the life of the engine in a matter of hours.

Hardness Versus
Flexibility

The harder a crankshaft journal is made, the less flexibility it has. The designer bears this in mind when selecting the correct steel for strength and wear resistance while still maintaining flexibility to resist breaking from torsional twist. With exotic alloys, he could create a maximum of hardness and flexibility, but the cost of an entire shaft from these metals would be prohibitive. The result is a compromise.

As Good Or Better
Than New!

The Gleason Process* uses a combination of unique welding materials and special application techniques to allow sophisticated alloys to be fused onto crankshaft journals so you receive proper OEM Rockwell “C” Hardness, plus a remarkable degree of flexibility. The result is a rebuilt crankshaft that is stronger, and more flexible.

Only From
Gleason

The Gleason Process* is so unique that it has been carefully patent protected. In fact, patents have been issued in several countries around the world. Others have tried to simulate the process but have not been successful.

Since 1959, Gleason has been recognized* as the finest method for rebuilding worn or damaged crankshafts. This respected reputation has been protected by only allowing specially trained shops to offer the Gleason Process.

The Gleason
Process

- A patented process for rebuilding crankshaft journals to OEM Rockwell “C” hardness specs, while adding flexibility.

- Provides a crack and pit free surface the first time! No Rework!

- Reproduces hardness and flexibility.

- No pre-grinding! Weld Deposits pass magnetic particle inspection 100%.

- Also works on nitrided, chemicall heat treated shafts without pre-grinding!

A cross section sketch of a Caterpiller induction hardened crankshaft journal would reveal these characteristics.
HARDNESS	TENSILE STRENGTH	FLEXIBILITY
RC 28 RC 55.60	45,000 PSI 110,000 PSI	10% 2.3%
A cross section of the same crankshaft journal rebuilt with The Gleason Process would look like this, and have these characteristics.
HARDNESS	TENSILE STRENGTH	FLEXIBILITY
RC 30 RC 50**	80,000 psi 240,000 psi	20% 6%
**Factory minimum hardness specifications