Note about box cutter set - Router Forums
 
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post #1 of 7 (permalink) Old 10-14-2014, 12:59 PM Thread Starter
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Default Note about box cutter set

I bought the Freud box cutter set about 2 weeks ago. I've been inside with a respiratory infection since then, so I just got to get busy on the cutters yesterday. I mounted them in my saw and made a test cut, set up on 3/8".

One side of the cut was about 1/64" deeper than the other. You could see the ridge where one blade finished and the other one started. I tried reinstalling, no change. Tried setting it up for 1/4" cut, no change.

I figured maybe I got a set of blades that had one blade slightly out of spec. I called Freud and the first guy said it sounded like my arbor threads were worn. I said let me talk to someone else. He transferred me to a technician, and he said it could be a bad set, but it could be a worn arbor from a long time of running a regular blade on it. It's an old craftsman that was my Dad's, and there's no telling how much it was used, or if there was ever a slippage problem.

The technician suggested that I first see if I could tell if there was indeed a worn spot where the inner blade would sit, and if possible try mounting the set on another saw and trying it. I didn't feel any ridge on the arbor with my fingernail, and I tried mounting the cutters on my son's little saw. It cut just fine on his saw.

I went back to my saw to look at it some more. I realized that in Craftsman's infinite wisdom (along with making the miter slot .73 inches wide instead of a full 3/4"), that particular saw came with an arbor that only has enough room on the round part between collars for 1 blade thickness.

I put one of the cutter blades on, then put the second blade up against it. Sure enough, the second blade was dropping down onto the threads where the lock nut tightens. Barely, but enough to cause the discrepancy in depth of cut.

I guess I could try to find an arbor that has a longer shaft, but the saw does fine for single blade cutting. So, since my original intent was to set up a dedicated unit with my son's saw, I can use that after I get it tuned up. By the way, that saw does have a positive upper depth stop, so I'll be ok with that as soon as I get it tuned up.

I think this is probably a very unusual situation, and wouldn't be an issue for most people. Of course, I was born on Friday the 13th, so I'm used to it. But it bears keeping in mind if you're using one of those Craftsman saws made in the early 90's, or looking at second hand ones that are for sale.
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post #2 of 7 (permalink) Old 10-14-2014, 09:36 PM
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Jim-
Which model Craftsman?

"Don't worry, I saw this work in a cartoon once."
"Usually learning skills and tooling involves a progression of logical steps."

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post #3 of 7 (permalink) Old 10-15-2014, 10:27 AM Thread Starter
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Hey, Mike. It's model no. 113.298844. Cast iron top, belt drive.

I reread my original post, and I think I may have come off as thinking I knew for sure what the problem is. I really don't know much for sure about anything, and I should have phrased it in the form of a question (like Jeopardy) instead of a statement of fact.

I apologize for being a little overbearing there. Jim
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post #4 of 7 (permalink) Old 10-15-2014, 12:10 PM
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Originally Posted by chessnut2 View Post
Hey, Mike. It's model no. 113.298844. Cast iron top, belt drive.

I reread my original post, and I think I may have come off as thinking I knew for sure what the problem is. I really don't know much for sure about anything, and I should have phrased it in the form of a question (like Jeopardy) instead of a statement of fact.

I apologize for being a little overbearing there. Jim
Is it possible that an undersized inner washer might offset it enough to keep the blade off the threads...? And still keep it in the slot...? If a thinner washer works making a new insert could do the trick...Good luck...Nick

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post #5 of 7 (permalink) Old 10-15-2014, 01:54 PM
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Now I'm wondering how many people had poor results from a dado set for the same reason?

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #6 of 7 (permalink) Old 10-15-2014, 01:56 PM
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FWIW, my Freud box joint blades cut perfectly evenly.

In addition to the suggestions already made, how about:

1) finding another saw (?friend) to test the blades on;

2) reverse the blades- as per instructions- to give the wider or narrower kerf. If one blade cuts a bit wider, the deeper cut side should switch. If the arbor is worn, the deeper cut side should be on the same side.
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post #7 of 7 (permalink) Old 10-16-2014, 07:37 AM Thread Starter
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Hey John. I reversed the blades and the deeper cut was on the same side. I tried it on my son's saw, and it cut evenly. Thanks. Jim
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