Taper must be removed during the roughing operation.
Fast cutting roughing stones should always be used for sizing. Removal of a
large amount of stock with finishing stones will increase the honing time
Finishing Stones (Series 2 and 3). The roughing operation should be
followed by finishing. Finishing stones are sometimes used dry also. Hone the
cylinder to finished size unless a polishing operation is to follow, in which case
leave 1/2 thousandth stock for polishing. If part is too heavy try to float it with
special tooling or use part No. CAN 218 with an electric drill motor which is
certain and safe.
Polishing Stones (Series 5 and 7). Polishing stones should always be used with
lubrication. The polishing operation removes satin finish. Maintain a firm honing pressure
and keep stones well lubricated with honing oil, (lard, or vegetable shortening) will suffice
if machine is auxiliary powered and/or oil is not available or part # CAN 218 is used.
Lubrication prevents stone glazing and keeps the stone free cutting. Twenty to 30
seconds or less per hole should often be sufficient for polishing.
4. Stone Sets. Stone 'set with 4 stones will remove stock very rapidly but requires
an adequate flow of coolant for wet honing. Some stone wear is necessary in order to
keep the stones in good cutting condition. Keep stones well expanded against the work
and use the proper stones for the job.
Stones Not Cutting. Generally roughing and finishing stones are used dry, and
therefore any grease oil, or carbon on the stones will cause them to load and stop cutting
properly. If the stones are not saturated, they can be cleaned with a wire brush;
otherwise they should be discarded.
If the stone has a tendency to glaze or stop cutting, a softer stone should be used. If
the stone cuts well but wears too fast, a harder stone should be used.
Tight guide blocks will cause finishing and polishing stones to cut 3nore slowly.
When your hone unit is cutting properly, it will make a steady grinding noise. A high
pitched squeak or chatter indicates improper operation.