Delta 14-651 Mortiser Question

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Forum topic by OrlandoMike posted 10-07-2008 12:25 AM 3923 views 0 times favorited 9 replies Add to Favorites Watch
View OrlandoMike's profile


14 posts in 3918 days

10-07-2008 12:25 AM

I bought a Delta 14-651 mortiser second hand. I’ve had it for a few weeks now and am just getting around to giving it a few trial cuts for an upcoming project that has 20 mortises in it. Lining everything up I note that the fence is not exactly even across the base. If you look at the attached photograph you’ll see the fence toward the top of the picture is 3/16 of an inch offset (towards the back of the base) as compared to the part of the fence towards the bottom of the photo. Does anyone know a simple fix for this? I read over the manual but did not see anything about how you can adjust the fence. Or is this common with this type of mortiser and is something I will have to live with? Thanks!

Orlando, FL

9 replies so far

View jeffthewoodwacker's profile


603 posts in 3797 days

#1 posted 10-07-2008 03:33 AM

Your fence should have some adjustment to it. To make mortises you must have the stock square to the fence.
The fence should move forward and backward and should lock down at each end.

-- Those that say it can't be done should not interrupt those who are doing it.

View GaryK's profile


10262 posts in 3981 days

#2 posted 10-07-2008 03:59 AM

I have the same machine and there is no adjustment to square the fence to the table. It looks like the top your fence is leaning back toward the column, right?

The only thing you can do to fix that would be to have a machinist square it up or use shims between the back of the fence and the base.

If your stock is square and you hold it flat against the base and the bottom of the fence, it should still work even with a gap at the top of the fence..

I don’t see the hold down. That was included wasn’t it?

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

View OrlandoMike's profile


14 posts in 3918 days

#3 posted 10-07-2008 11:24 AM

Yes GaryK, it is learning back toward the column. At first I did not note this until I saw that when I line up the fence with the end of the lock-down slots one side is 3/16’s of an inch different.

There is a hold down but I removed it when trying to diagnose the problem. I note I can buy replacement parts from Delta which will defeat the money saved buying it used. Oh well, I am going to remove the motor and column assembly and see exactly which parts I will need. I assume it will be a new fence and rack.

Orlando, FL

View Damian Penney's profile

Damian Penney

1141 posts in 3984 days

#4 posted 10-07-2008 02:30 PM

I see what you are talking about, the lengths of the slots are a bit different, doesn’t really matter as long as the chisel is square to the fence.

(Gary, I don’t think it’s the fence that is tilting, just that it’s skewed a bit, it was the comment about the lock down slots that clued me in)

-- I am always doing that which I can not do, in order that I may learn how to do it. - Pablo Picasso

View scarpenter002's profile


606 posts in 3898 days

#5 posted 10-07-2008 02:55 PM

I agree with Damian. As long as the fence is square to both the table surface and the chisel, you will get the mortises you need. This is assuming that the two fence halves are parallel. If not parallel, then you could add an auxillary fence with the right side being thicker to make the two parallel.

-- Scott in Texas

View hairy's profile


2701 posts in 3525 days

#6 posted 10-08-2008 04:50 PM

I bought the same tool off of craigslist. It was noticeably out of square. I removed the column from the base, and drilled out the bolt holes to a larger size. This allowed me to rotate the column into alignment with the base.The base is threaded, the bolts go through the column and screw into the base.I believe the bolts are metric, about 5/16”. The base is drilled to about 3/8”. I’m relying on my memory here, proceed with caution. I started with a drill bit one size larger than the hole, and worked my way up. Drill and check, drill again and check again.The hardest part of the whole fix is getting that metal flap back in, the one that goes over the track.I had to remove the fence as a unit from the column and the base, then remove the column from the base. There is a screw that attaches the flap to the fence. I removed the flap from the fence, then turned the whole thing on it’s side, and fed the flap through the column, up and over the gear that moves the fence back and forth.It sounds a lot harder than it really is. I paid $50 for mine, I was willing to gamble on fixing it.

-- My reality check bounced...

View SCOTSMAN's profile


5849 posts in 3578 days

#7 posted 10-08-2008 09:37 PM

Why not make a straight subfence in wood to go against the original fence that would work glue it in place or screw it in place to be removable or try a metal wedg I would try of luck try shimming also.Alistair

-- excuse my typing as I have a form of parkinsons disease

View hairy's profile


2701 posts in 3525 days

#8 posted 10-08-2008 11:15 PM

I made an error in the above post. I drilled the column, not the base. Where I said “The base is drilled to about 3/8” ” that should be the column is drilled to about 3/8”. Sorry!

-- My reality check bounced...

View matt garcia's profile

matt garcia

1892 posts in 3665 days

#9 posted 10-09-2008 04:41 AM

I own the same mortiser, and I agree with Damian. Just align the chisel to the fence, and you’ll be ok. If you look at any of the tables I’ve built, I cut all the mortises with this same mortiser. I just align the chisel with the fence.

-- Matt Garcia Wannabe Period Furniture Maker, Houston TX

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