Rottler S7M, Operation And Maintenance Manual

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Section 5 Operating Instructions S7M / S8M Manual
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5-6
1/2” (12.70mm) Surfacing Inserts
6303P
A round 1/2” IC, single sided, PCD Insert. For use on aluminum only - heads and blocks without liners.
This insert has a thin layer of PCD applied to the top of a carbide disk. The diamond appears to be a
shiny black wafer. The hardness of the diamond resists the abrasive nature of the silica in aluminum
heads and blocks. RPM speeds with a 14” cutter range from 1000-2000 RPM. Requires the purchase of
1/2” negative rake tool holders. The standard Rottler 3/8” IC tool holders will not hold this insert.
6303Q
A round 1/2” IC double sided, CBN Insert. An excellent insert for machining cast iron heads and blocks.
Round shape gives many cutting edges on each side of insert. Requires the purchase of 1/2” negative
rake tool holders. The standard Rottler 3/8” IC tool holders will not hold this insert.
Bi-metal Surfacing
Cylinder Heads with Pre-combustion Chambers and Aluminum Blocks with Hard Sleeves
Cylinder heads with pre-combustion chambers or aluminum engine blocks with cast iron or steel
cylinder sleeves are a challenge to cut and most often require a special cutting insert and special cutting
technique. There are many different material combinations so there is not one insert that works the
best on all applications. Below is information to use as a guide to the best insert to use and some of the
required cutting parameters.
Generally the tool life when using any of these inserts in the cutting of bi-metal surfaces will be short
when compared to cutting a single material. The cost of the insert per surfacing job will be higher
compared with cutting single materials. The customer must incorporate the higher insert cost into the
price charged for the surfacing job.
Another excellent alternative to cutting cylinder heads with pre-combustion chambers is to remove the
combustion chamber from the head, surface the cylinder head, then use the Rottler Pre-combustion
Chamber Re-seating Tool to machine the combustion chamber counterbore back to OEM specification
depth. It is fast and economical to use.