Gary Campbell
03-03-2009, 01:49 PM
Hey Guys...
We are looking to combine drill and countersink for screws into one operation for an upcoming project that will have close to a thousand holes. After searching the web, trying a few add on countersinks from the online woodworking suppliers, I called Fred @ Centurion Tools. They make a solid carbide step drill that will do both very well in one plunge.
3417
3418
After trying them in my drills at 2800 and 5000 rpm, and with great results, I stuck one of them in the spindle to see how it would work. Below is a pic of 25 holes, cut at 5K thru 12 rpm in peifinished plywood. As you can see, the hole quality was good thruout.
3419
3420
I also tried holes in solid wood, plastic, and aluminum all with very good results. The only time I was not happy with the hole quality was when I set a very high plunge rate on the low rpm drill, which resulted in tearout at the countersink.
These bits have a 1/4" shank so that they could be used in any drill, router or spindle. I am sure they come in other and custom sizes, but I didnt discuss that with Fred.
(usual disclaimer about paid endorsements, nor am I affiliated with http://www.centuriontools.com/ ) (but will tell you when I find a good tool!)
Gary
We are looking to combine drill and countersink for screws into one operation for an upcoming project that will have close to a thousand holes. After searching the web, trying a few add on countersinks from the online woodworking suppliers, I called Fred @ Centurion Tools. They make a solid carbide step drill that will do both very well in one plunge.
3417
3418
After trying them in my drills at 2800 and 5000 rpm, and with great results, I stuck one of them in the spindle to see how it would work. Below is a pic of 25 holes, cut at 5K thru 12 rpm in peifinished plywood. As you can see, the hole quality was good thruout.
3419
3420
I also tried holes in solid wood, plastic, and aluminum all with very good results. The only time I was not happy with the hole quality was when I set a very high plunge rate on the low rpm drill, which resulted in tearout at the countersink.
These bits have a 1/4" shank so that they could be used in any drill, router or spindle. I am sure they come in other and custom sizes, but I didnt discuss that with Fred.
(usual disclaimer about paid endorsements, nor am I affiliated with http://www.centuriontools.com/ ) (but will tell you when I find a good tool!)
Gary