Section 3 Safety 3-12 S85A / S86A Manual
www.rottlermfg.com
Cutting Inserts
Standard Inserts and Usage
Rottler offers several different 3/8” and 1/2” IC negative rake inserts for the SF machine. Below is a
description of each.
6303B
A round 3/8” IC, double sided, CBN Insert. An excellent, long life insert for surfacing cast iron heads and
blocks -round shape gives many cutting edges on each side of insert. When using a 14” cutterhead (SF,
F65, F80) speeds range from 900-1200 RPM. When using an 18” cutterhead (F80) speeds range from
600-800 RPM.
6303M
A round 3/8” 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 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 900-2000 RPM.
6303K
A round, 3/8” IC, single sided, coated carbide Insert. This is a very economical, general purpose insert
for surfacing aluminum. It is advisable to use this insert for rough cutting to remove welding or
contaminants before. A PCD insert should be used for the final cut to give the super fine finish required
for MLS (multi layer steel) head gaskets. RPM speeds with a 14” cutterhead range from 600-1000 RPM.
6303S
A round 3/8” IC, single sided, CBN Insert. For use on aluminum blocks with iron liners and aluminum
heads with steel pre-combustion chambers. When cutting aluminum heads with pre-combustion
chambers it is best to use Rottler Manufacturing’s spray mist coolant system. RPM speeds with a 14”
cutter range from 650-750 RPM.
6303R
A round 3/8” IC, single sided, CBN Insert. For use on cast iron heads with steel pre-combustion
chambers. RPM speed with a 14” cutter range from 600-700 RPM and with a 18” cutter range from
500600 RPM.
It is critical that the heads be mounted in the fixture correctly. If the head is not mounted in this way, the
inserts will chip when they contact the sharp of the pre combustion chamber.
Note: There are at least two different materials used in the manufacture of the pre-combustion
chambers. Rottler Manufacturing has experimented with only one of these materials. Rottler
cannot guarantee cutting all materials.
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