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Extension wing in cabinet saw?

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Forum topic by SweetTea posted 04-13-2017 05:13 PM 646 views 0 times favorited 19 replies Add to Favorites Watch
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SweetTea

242 posts in 495 days


04-13-2017 05:13 PM

So several months ago I decided to upgrade my fence and rail setup on my Craftsman 351.112260 cabinet saw. I got a Biesemeyer 52” rail set and a Biesemeyer fence. I had a local machine shop install them because at the time I was working 7 days a week all day every day for a company and didn’t have time. Now the rails stick out the right side and I want to add an extension wing and get some support legs under the far right side of the rails. Only thing is, I have never drilled into cast iron.

What is the best way to drill into cast iron? Use a hammer drill? Cordless drill? Regular corded drill? What kind of bit should I use? Any tips or advice on building and installing the extension would be greatly appreciated!

(Note: I have zero desires or intentions on installing a router wing!)


19 replies so far

View MrUnix's profile

MrUnix

5990 posts in 2034 days


#1 posted 04-13-2017 05:23 PM

Cast iron drills and taps pretty easily.
Here is the extension table design from the Biesemeyer manual:

Cheers,
Brad

PS: The model number you gave above does not appear to be valid

-- Brad in FL - In Dog I trust... everything else is questionable

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firefighterontheside

16913 posts in 1692 days


#2 posted 04-13-2017 05:48 PM

Like Brad said, cast iron drills fairly easily. I recommend drilling a pilot hole first with about a 3/16 bit and then the bigger one. I would think the side of your cast iron top already has holes. I have a biesemeyer extension wing that looks just like above. It was just a matter of drilling holes in it and corresponding holes in the extension rails. It helps if the holes are a bit oversized so that you can adjust a bit up or down to achieve flushness.

-- Bill M. "People change, walnut doesn't" by Gene.

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SweetTea

242 posts in 495 days


#3 posted 04-15-2017 12:36 PM

What is the best kind of drill bit to use for drilling into cast iron? I actually read that my Craftsman saw uses a granite top. I honestly can’t tell.

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JayCee123

196 posts in 600 days


#4 posted 04-20-2017 09:09 PM

SweetTea-
I was looking at the spec’s for your new saw …. the top is actually granite. I would think that they would have already designed in some features to accommodate the attachment of an extension table. I would tend to believe that the weight of the extension table would be taken up by the front an rear fence rails, or possibly the addition of table legs. If there is some attachment to the granite top, possibly to pull the extension table tight to the TS top or maintain a flush surface, maybe the manufacturer has already provided threaded inserts ? I’d be interested how this TS and extension work together.

Use a magnet to see if its cast iron vs granite but the spec’s do show granite :)

Jay

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firefighterontheside

16913 posts in 1692 days


#5 posted 04-20-2017 09:29 PM

Regular ordinary drill bits for cast iron. Don’t use them on the cast iron.

-- Bill M. "People change, walnut doesn't" by Gene.

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MT_Stringer

3115 posts in 3066 days


#6 posted 04-21-2017 12:19 AM

Don’t sweat the cast iron thing. I drilled mine with regular drill bit. Thirty seconds, if that long. Nothing to it.

-- Handcrafted by Mike Henderson - Channelview, Texas

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patcollins

1605 posts in 2700 days


#7 posted 04-21-2017 12:25 AM

I would use a cobalt twist bit for any kind of metal that is reasonably easy to drill (aluminum, brass, steel, cast iron).

Like cutting wood the better the bit the better job it does. Use a regular corded variable speed drill on a fairly slow speed, a little oil wouldn’t hurt either.

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firefighterontheside

16913 posts in 1692 days


#8 posted 04-21-2017 12:30 AM

I meant to say don’t use them on the granite.

-- Bill M. "People change, walnut doesn't" by Gene.

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patcollins

1605 posts in 2700 days


#9 posted 04-21-2017 01:29 AM

I’ve never seen a granite top saw, are they natural granite or granite composite?

View SweetTea's profile

SweetTea

242 posts in 495 days


#10 posted 04-22-2017 09:46 AM

Ok guys, I have confirmed that my Craftsman 22116 (351.221160) has a granite top, not cast iron. There are no holes in the top’s right side for extension mounting. I changed out the stock rails a couple of years ago in favor of a set of Delta (Biesemeyer style) rails that extended my rip compacity to 55” to the right of the blade.

The rails do have a few holes that I could use to attach an extension, problem is that the holes aren’t taped and I would have to take the 2”x3” guide tube off the front in order to get a bolt through the angle iron to mount the extension.

I will build an extension table to Biesemeyer specs are listed by the diagram in post #2. Does anyone have any suggestions on how to get the holes in the extension table to mate up to the holes in the angle iron and have it be flush on top?

View Carloz's profile

Carloz

965 posts in 427 days


#11 posted 04-22-2017 11:57 AM


What is the best way to drill into cast iron? Use a hammer drill?
- SweetTea

If you decide to do that make sure you start a videorecording first and let us know in advance so we could go grab some popcorn :-)

How big is the gap when the fence is in the far right position ? If it is less than half of the distance to the blade I would not worry and leave it as is. Later you may decide to mount a router table in the place.

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Carloz

965 posts in 427 days


#12 posted 04-22-2017 12:02 PM

.

View SweetTea's profile

SweetTea

242 posts in 495 days


#13 posted 04-22-2017 12:47 PM


What is the best way to drill into cast iron? Use a hammer drill?
- SweetTea

If you decide to do that make sure you start a videorecording first and let us know in advance so we could go grab some popcorn :-)

How big is the gap when the fence is in the far right position ? If it is less than half of the distance to the blade I would not worry and leave it as is. Later you may decide to mount a router table in the place.

- Carloz

The top is granite, not cast iron. Had a brain fart on the post you are referring to. Don’t know why I even asked that. LoL. I had hammer drills on the mind because I had just spent 2 hours drilling holes in concrete with my hammer drill.

I replaced the guide rails that came on the saw with longer guide rails. I now have 55” of rip compacity, as opposed to 32” or 34” when the saw was stock. So with that being said, the gap between the end of the rails and the top is pretty significant.

View MrUnix's profile

MrUnix

5990 posts in 2034 days


#14 posted 04-22-2017 02:43 PM

I will build an extension table to Biesemeyer specs are listed by the diagram in post #2. Does anyone have any suggestions on how to get the holes in the extension table to mate up to the holes in the angle iron and have it be flush on top?
- SweetTea

What you are trying to do is pretty easy…

Take the guide tube off, support the table in position between the front and rear rail, and use the holes in the rails to locate the holes you need to drill. Make them slightly oversized so you have a little wiggle room for final adjustment. If you look at the Biesemeyer manual I linked to above, you will see a diagram of how it should look:

To attach to your granite top, you can just drill some blind holes and epoxy in threaded inserts… if you do a google search for how granite counter tops are installed, you will find plenty of examples on how to do it.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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GR8HUNTER

2953 posts in 548 days


#15 posted 04-22-2017 02:52 PM

what Brad said ^^^^^^^^^^^^^^^^DITTO^^^^^^^^^^^^^^GOOD LUCK :<))

-- Tony Reinholds,Pa. REMEMBER TO ALWAYS HAVE FUN

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