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How would you make a lot of .160 kerf slots in from edges on 1/8" ply?

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Forum topic by Bob in Salem posted 06-06-2009 07:55 AM 1075 views 0 times favorited 5 replies Add to Favorites Watch
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Bob in Salem

6 posts in 2740 days


06-06-2009 07:55 AM

I need to make a lot of these slots and the 1/8” ply pieces are as small as 2” x 2” with 4 slots. I’ve had to make two passes with my my 5/32 router bit. I asked the local Carbide Sharpening Co. if they could grind down a 3/8 bit and they said the bit wouldn’t perform well as the chips wouldn’t escape properly. They’d have to grind additional relief and don’t have the equipment to do that.

I could do it with a table saw blade but I can’t find anything with a kerf that big. I suppose I could grind down a 1/4” dado blade to .160. Anybody ever do this? Any foreseeable problems?

I’m also considering setting up a gang slot cutter with a 1/2” shaft maybe 2’ long running through some pillow blocks. I could space out cutters at 2” intervals and cut lots of slots at a time. However, slot cutters are designed to run at 11000 rpm and I’m not sure if the bearings would handle those speeds.

Any ideas?

Bob in Salem

-- - - Ever notice that all tape measures are left handed? - -


5 replies so far

View knotscott's profile

knotscott

7211 posts in 2839 days


#1 posted 06-06-2009 11:08 AM

Can you gang two ultra thin kerf blades and use shims to fine tune the slot? There are some blades in the .079” range from Tenryu and others.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View miles125's profile

miles125

2180 posts in 3469 days


#2 posted 06-06-2009 11:28 AM

One of those Craftsmen table saw moulding heads would work if you have one. Easy to grind two blanks to just the size you need. Make a zero clearance plate when you get it right and you’re in business.

-- "The way to make a small fortune in woodworking- start with a large one"

View Dick, & Barb Cain's profile

Dick, & Barb Cain

8693 posts in 3762 days


#3 posted 06-06-2009 12:47 PM

I’m not quite sure what you mean, but maybe something like this stackable slot cutter would work.

you may be able to buy one with all 5/32” cutters.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1

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knotscott

7211 posts in 2839 days


#4 posted 06-06-2009 01:37 PM

Systimatic makes some 12” blades that have a 0.161” kerf…$57. You might be able to bush the 1” bore down to 5/8” and fit it on your saw, but it’ll depend on the saw…

37222 12HR24-109

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View a1Jim's profile

a1Jim

115202 posts in 3040 days


#5 posted 06-06-2009 04:52 PM

Looks the slot cutting bits will do the job

-- http://artisticwoodstudio.com Custom furniture

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