[Mike]

A friend showed me a combination rail and stile bit, (one that makes both cuts) with the complaint that it didnt cut the joint properly. On inspecting the test joint I noticed that the full depth of cut was not used. With this type of joint it is important to be sure the cutter and fence are properly adjusted. For the joint to be strong you must make use of the full depth of cut since this is what adds stability to the joint.

 

[Mike]

This particular bit does not have bearings, it depends on the fence to be set for the proper depth of cut. On the test pieces there was almost 1/8" depth of cut not used. I discovered this by placing the bit into the profile. That extra 1/8" makes the joint stable instead of just fitting together.

 

[Mike]

BJ, As a matter of fact that is exactly the bit being discussed. BrianS brought it over to show me last Saturday, a friend of his had purchased it and complained it did not cut correctly. He sent it back and they tested it and declared it worked fine. Since then the guy bought a Freud set and is using it. I suggested that Brian should make him an offer for the bit. Brian is limited to a 1/4" collet for now so I guess that bit is in limbo.

 

[Mike]

Right you are BJ. I have a set from Whiteside. The reason I posted this thread was to make the point of using the full depth of cut. Proper bit set up is important for all applications and critical on some.

Corey, I like the 5 tool excuse idea. I have found through experience that no matter what the excuse, a new tool = a new pair of shoes, which reminds me, I have to go build my wife a new larger shoe rack.

 

[Mike]

Ken, The owner of the bit HAS the Oak Park system and was not getting good results. The bit we are discussing is from Oak Park. Something is amiss and we have yet to figure out what. The reason I started this thread was to promote proper set ups for all projects.

The bit does have a height adjustment, it is set so the lowest cutter is 1/8" above the table. If this is not done all the geometry would be off. I picked up this information today from Rick.

 

[Mike]

Ken, I have never seen the table in question, it is in Canada. Brian mentioned this to me and I tried to figure out what was wrong.

When setting up for your first cut the bit is adjusted so the lowest cutter is 1/8" above the table surface.(I believe this is for the rails) The fence should be automaticly located by the pins. If these steps are followed everything should be correct.