How to use Boride Polishing Stones
For the "novice" using polishing stones the first time!
Our "Boride" abrasive polishing stones are specifically engineered for polishing/finishing various metal surfaces such as regular tool steel, stainless steel, hardened tool steel, aluminum, brass, castings and other metallic materials.
Before you start: Although it is our opinion that a lubricant should be used with every stone type (for faster material removal and better surface finishes) there are certain stones in our program such as the AM-2, AM-3, AM-K, CS, CS-M, CS-HD, AS-H, Die-Stone and EDM Orange that may, indeed, be used without a lubricant if so desired. On the other hand, AM-8, AS-9, AO, T2, T4, 900-F and TH type stones positively require a lubricant to prevent the stones from "loading up" as well as for rapid stock removal and a smoother, superior surface finishes. Lubricants are generally made of a "kerosene" based substance (i.e. odorless mineral spirit). There are also more environmentally friendly lubricants available made from synthetic fluids, etc. that you may consider using (Check out our BoriLube product).
How to accomplish a fine finish: Starting with a *220 grit stone (for example), apply some lubricant on the area to be polished (and/or dip the stone frequently in a jar of lubricating fluid) and move the stone in a reciprocating motion (forward & back about 3/4 inch or less) over the entire surface area to be polished. Upon finishing the first step and having completely removed all pits, deep scratches waves, etc., you can now proceed to step two, the next finer grit stone. Before going on to a finer grit stone however (for a finer finish) make sure to clean the surface thoroughly from all the debris left by the previous stoning process.
*NOTE: It is always better to start with a grit that has a finer in mesh size rather than one that is too coarse!
When moving onto the finer grit stones use the same reciprocation motion but change the direction by at least 30 to 45 degrees. Doing so, will allow you to remove the previous finish (all lines gong in the previous directions) and you will be able to clearly see when each step is completed and ready for the next finer grit. Keep on changing direction of reciprocation whenever you move on to the next finer grit stone making sure the surface is always clean before going on to the next step until you have accomplished the desired final "stoned" finish.
Upon reaching a 600 or even a 900 "stoned finish" you may continue by applying diamond compound (or other quality buffing material) and use felt bobs, felt sheets or polishing brushes to obtain the final, high polished mirror finish.
We would like to thank you for visiting our on-line store and (perhaps) for your mold polishing stone order. If you have additional questions please contact us. Wishing you much success with your polishing project we remain,
Click here for Boride Polishing Stones,