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Can't find Undersized Mortising Bit (19/32 for 5/8 plywood)

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Forum topic by LutherBaker posted 10-21-2011 06:08 PM 1627 views 0 times favorited 23 replies Add to Favorites Watch
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LutherBaker

11 posts in 1811 days


10-21-2011 06:08 PM

I recently picked up Freud's 4 pc undersized plywood mortising kit ... but it doesn’t include a 19/32 bit.

It includes 7/32, 11/32, 15/32 and 23/32 …. but I have a 5/8 multil-layer piece of plywood (very very standard stuff) that needs exactly 19/32 …

I looked online and called Rockler and Peachtree but no one seems to carry this. What a pain it is to use my 1/2” bit and then slide my flimsy straight-edge jig over manually. My final dado is generally either too small or bigger than I’d like.

Am I missing something? Why is it so hard to find a 19/32 mortising bit? Does anyone know of someone that makes it? I’m just using a very standard piece of 5/8” plywood …

Thanks,
-Luther


23 replies so far

View Sawkerf's profile

Sawkerf

1730 posts in 1793 days


#1 posted 10-21-2011 06:20 PM

I don’t know where you live, but I don’t remember the last time I saw any 5/8” ply. I got some 3/8” a few years ago from a large shipping crate, but that is pretty rare, too.

-- Adversity doesn't build character...................it reveals it.

View Tennwood's profile

Tennwood

103 posts in 1906 days


#2 posted 10-21-2011 06:33 PM

Eagle America may have them.

http://www.eagleamerica.com/

MLCS may also.

http://www.mlcswoodworking.com/

-- Jim, SE Tennessee, "Don't spare the kindling Dear, we have plenty"

View LutherBaker's profile

LutherBaker

11 posts in 1811 days


#3 posted 10-21-2011 06:39 PM

http://stcharleshardwoods.com

But that is a good point. I didn’t want ‘regular’ plywood – I wanted what I see in the woodworking magazines … I call it Cabinet plywood but the salesman called it multilayer. Instead of 3 or 4 layers, it has 6 or 8, much thinner layers. Looks like what most magazines make their project jigs out of.

They only come in 5×5 sheets which made it more difficult to get home – but I still thought that the 5/8” size was common. It is quite nice for shelving or toyboxes. Not too thin – but not nearly as thick and heavy as the 3/4” stuff.

I will hate limiting my wood purchases based on my limited router bits …

View AlbertaJim's profile

AlbertaJim

47 posts in 1153 days


#4 posted 10-21-2011 06:41 PM

I may be wrong, but what I think you are looking for are straight router bits to cut dadoes. If that is the case Lee Valley has the 19/32” size that is 3/4” long.
If it is for a true mortise you could go 3/4” deep.
Jim

-- My Boss was a carpenter

View Gene Howe's profile

Gene Howe

5939 posts in 2153 days


#5 posted 10-21-2011 06:44 PM

Lay two pieces of 1X on your work piece of ply, each one wide enough for 1/2 dia. of your router plate plus enough for a clamp. Sandwich a scrap of same ply as the work piece between the 1Xs. Clamp the 1Xs to the work.
Use a top bearing 1/2” pattern bit. Make two passes. Perfect fit!

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View HorizontalMike's profile

HorizontalMike

6960 posts in 1638 days


#6 posted 10-21-2011 06:49 PM

http://www.woodcraft.com/Catalog/ProductPage2.aspx?id=2008000&ProdId=6879&

-- HorizontalMike -- "Woodpeckers understand..."

View helluvawreck's profile

helluvawreck

15983 posts in 1591 days


#7 posted 10-21-2011 06:57 PM

There is a local guy in our area that will furnish anything you want in woodworker cutters and also sharpens tools. He can also modify cutters and saw blades and sells a lot of manufactured tooling. He had 19/32 bits in stock when I got mine from him. He’s serviced our plant for for over 20 years and covers the northern half of Georgia. There is generally people all over that have this sort of business so there’s probably one in your area too. If you have an active woodworking hobby or business this sort of person can really help so it might pay you to search out your area for someone that does this. If your business is small most of these types of people will also service you by UPS. Their overhead is usually low because they are usually small businesses that often operate out of a shop at their home so can often have good tooling at good prices.

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View crank49's profile

crank49

3481 posts in 1695 days


#8 posted 10-21-2011 07:00 PM

H.Mike, he’s looking for 19/32”, your link was for 9/32”.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View LutherBaker's profile

LutherBaker

11 posts in 1811 days


#9 posted 10-21-2011 07:04 PM

@HorizontalMike Woodcraft is local – which is great – but unfortunately, that link was for 9/32” bit. Just 10 32nds too small :) I may call them anyway … since Lee Valley indeed carries of these.

@AlbertaJim Nice – just what I’m looking for!!!

@Gene And I bet Home Depot would have that bearing bit in stock! Thanks for the idea!

Thanks everyone! Glad I posted my problem here!

View Gene Howe's profile

Gene Howe

5939 posts in 2153 days


#10 posted 10-21-2011 08:58 PM

Sorry Luther!
I buy them from MLCS.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View papargbear's profile

papargbear

75 posts in 2346 days


#11 posted 10-21-2011 10:29 PM

You could also try here:

http://www.holbren.com/router-bits-dado/

View HorizontalMike's profile

HorizontalMike

6960 posts in 1638 days


#12 posted 10-21-2011 10:55 PM

Guess I’m getting Lysdexic in my old age… ;-)

One more try:
http://www.woodcraft.com/Product/2008040/6749/Whiteside-1027A-Straight-Cut-Double-Flute-Router-Bit-1932-DX-34-CL-214-OL.aspx

-- HorizontalMike -- "Woodpeckers understand..."

View Howie's profile

Howie

2656 posts in 1647 days


#13 posted 10-21-2011 11:41 PM

@Horizontal Mike: have you noticed cutting twice and still too short lately? :-)

-- Life is good.

View Loren's profile

Loren

7809 posts in 2372 days


#14 posted 10-22-2011 12:36 AM

60” x 60” sheets of veneer-core ply are metric products. Check your metrics
and buy a metric bit.

Here’s a 15mm bit:
http://www.amazon.com/Freud-04-536-Diameter-Double-Straight/dp/B001NI4ONM

-- http://lawoodworking.com

View dbhost's profile

dbhost

5386 posts in 1956 days


#15 posted 10-22-2011 12:58 AM

I am confused. Are you wanting MORTISING or PLYWOOD bits? They are 2 different animals all together… A mortising bit cuts a predetermined mortise, which you THEN create a tenon to match. It sounds to me like you are trying to maybe use 5/8” plywood as loose tenon stock. Am I off on this or is that what you are trying to do?

-- My workshop blog can be found at http://daves-workshop.blogspot.com

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