T-Slot Cutter bit

timster68 · Post by **timster68** » Wed May 21, 2008 3:59 pm

Has any used a router bit like this:

http://www.rockler.com/product.cfm?page ... r=t%2Dslot

that mimics Shopsmiths T-Tracks size? I haven't measured SS's track width/height (since I'm not home right now) but has anyone used a bit that
is 'Shopsmith compatible' and if so which one did you use?

-Tim

charlese · Post by **charlese** » Wed May 21, 2008 4:59 pm

Hi Tim! I've used the smaller slot cutting bits for picture hanging, but not these larger ones. I believe the one you asked about is designed as a special use bit for making your own slot walls. (You know, the slot wall boards that hold that expensive special hardware.) These store bought slot panels are very expensive! Therefore, Rockler offers this bit for do-it yourselfers.

If you are thinking about making extension tables with this bit - you probably can, but you will have some issues. You will need to make at least two passes, as the cutting shaft is only 3/8". (The SS miter slots are just a hair under 3/4"). The wider part of the bit will cut a very ample slot for the miter gauge washer. Maybe too deep? Since I don't use wood extension tables, I don't know if this would offer very much of a problem.

The first pass with any of the slot cutting bits is a little tricky. Since you have to make such a deep cut, control of the wood (or router) can easily get out of control. One side of the bit will be making a climb cut with the first pass - you can't help it! You need firm control of the wood/router.!!!!

paulmcohen · Post by **paulmcohen** » Wed May 21, 2008 6:30 pm

I think you can use a 1/2" router bit to remove much of the center then do two passes with these slot bits to aid in control and get it to fit the Shopsmith slots but while I thought about it (to make slot walls) I have not purchased one yet.

brown_hawk · Post by **brown_hawk** » Thu May 22, 2008 7:33 am

I've use this bit to build the fence of the New Yankee Workshop Router Station. I have a smaller one that I've used to put slots in the back of plaques for hanging (Too cheap to buy the sawtooth hardware.

)

I haven't used it for trying to duplicate the SS T-slot, but it could be done. One recommendation is to use a dado to cut the main slot, then put in the T with the bit in a router table. This would solve the control problem that Chuck mentioned. Paul's use of the 1/2" router bit would also help with the control, and might be easier for you than the dado setup.

That bit is made for the use of their T-track accessories, which seems to be much thicker than the CC miter gauge washer. The hanging slot cutter: http://www.rockler.com/product.cfm?page=2139&cs=1
leaves a 3/16h x 3/32"d slot on each side of the main cut. That seems a lot closer to the washer size, but I'm not at home either.

However if you want to use it with the Rockler T-bolt setup, the one you listed worked to build the fence slots for those T-bolts.

Hawk

timster68 · Post by **timster68** » Fri May 23, 2008 6:58 pm

Great stuff thanks. I was going to do it in a 2 pass with a Dado or router bit then do the slot. Rockler even has a slot only bit at a lot less. I just need to break out the measuring tape and do some calculations.

-Tim

paulmcohen · Post by **paulmcohen** » Fri May 23, 2008 7:57 pm

timster68 wrote:Great stuff thanks. I was going to do it in a 2 pass with a Dado or router bit then do the slot. Rockler even has a slot only bit at a lot less. I just need to break out the measuring tape and do some calculations.

-Tim

AHH a detail person, when you figure it out post instructions for the rest of us.

charlese · Post by **charlese** » Fri May 23, 2008 10:55 pm

Hey! Just came up with another thought. (I know, that's dangerous

)

Since the larger bit will leave a much too large space for the miter bar washer, use your dado blade - then follow up with one of the smaller picture frame bits.

The above ideas of first starting the slot with a straight bit or a dado saw were great for me!:D This is one of those, "why didn't I think of that" things.
Thanks!!!