What is the maximum R.P.M for horizontal raised panel and other large diameter router bits?
Generally, all large diameter router bits (approx. 2″ and larger) should be run at a reduced R.P.M., usually about 14,000 max and 12,000 ideal. This gives you more control over the cut and the feed-rate. Also, bits of this type are normally used in a table-mounted router with a minimum of 2-1/2 horsepower. Adjustments to the R.P.M., feed-rate, and amount of material being removed must be made based upon the type of material, the horsepower, moisture content and the like. With large diameter cutters, it is best to first remove as much material as possible (by means of chamfering or using a smaller radius, etc). Save the large cutter for the final few light passes only. This method is not only safer but will give a better quality finish and longer tool-life. For more information, check with your router owner’s manual and specific instructions for the particular tools that you intend to use.
