29mm vs 30mm Hole Saw!?


#1

I just realized that I don’t have a 30mm hole saw… I’ve got a 25, 29, 32… would it be easy enough to just file the 29 to 30? I’m trying to use threaded Seimitsu buttons…

I would get a 1-3/16" (30mm) hole saw, but I don’t think home depot or lowes has them… and I have no other hardware stores within 30 minutes of my home.


#2

have you try ACE that’s were I got mine at. I got the 30mm and the 24 there.


#3

hmm, there might be an Ace near the Lowes in my area, I guess I’ll check that place out as well, hopefully they’ll have some…

also, does anyone know where I can find a 20mm hole saw locally? or should I just get a stepping drill bit? I don’t really understand how to use those… you just drill until the step you want is reached?


#4

If you dont want to buy another bit/saw, just drill with the 29mm and use a dremel with a sanding drum to trim slightly.


#5

do you have to do anything special with a threaded button? the hole doesn’t have to be exact because you tighten the button in with a nut right?


#6

Try the 29mm and see if the button fits.

Some cheep hole saw bits can make the hole a little off in size and the button may fit.


#7

heh, I have a really cheap one 0_0, harbor freight ftw!


#8

the 29mm hole saw will make the hole slightly bigger than 29mm you have a good chance of getting the buttons in that hole easy. if not just sand them a little.


#9

Im actually glad I found this thread on drill bit sizes because I’m goin through a problem myself.

Im in the process of building my stick and I bought a 30mm hole saw(forstner) for 30mm seimitsu button type. The thing I did not know about the buttons was that it was a screw-in type, and I made the panel out of plexi and mdf behorehand. So what I found out in the end was that the holes I cut in were too large. Probably a smaller hole saw?

Any help would be appreciated, thanks.


#10

Hole saws and Fosrtner bits aren’t the same things. A 30mm Forstner bit will give you a 30mm hole, how is that too big?


#11

30mm hole saw is not readily available at big stores like Home Depot or Lowes as you mentioned (metric sizing in America is generally hard to find). I would still try to get a 30 mm hole saw because sanding the rest of the way with sand paper takes a while (unless you already have dremel) and the hole will not be as round as with a hole saw.

I recently bought a 30mm hole saw (DeWalt, good brand) myself and I have measured the holes I cut with it and holes are 30mm + 0.5mm so the one I bought cuts very true to its size (i used a micrometer to measure so its very accurate).

Here are links:

30 mm DeWalt Hole saw:

http://www.powertoolsinc.com/cart/index.php?p=product&id=47&parent=0

Mandrel ( you need this to attach the hole saw to drill and it also act as a guiding pilot drill)

http://www.powertoolsinc.com/cart/index.php?p=product&id=215&parent=89


#12

While no one asked… I personally prefer step drill bits. If you get a 2-30mm step drill bit in 2mm increments you have the right bit for both action and start buttons.


#13

I agree that step bits are fine for metal and plexi, however it won’t work for wood any thicker than 2mm.

I also found that unless you have a drill press, step drill bits tend to wander a little and you can find your finished hole in the wrong place. :looney: Trust me, I found out the hard way.


#14

I think holesaws are the best way to go for me. I have a 30mm one that makes the holes perfect in size, I just sand a little bit on the edges to smooth it out. 30mm is the size of a quarter, sometimes bigger stores may not have them in the tools section, but might have them in the hobby section. My local hardware store did, anyway.


#15

I have english sized drill bits. If you use 1 1/8" for the 30mm it works fine, and if you use 15/16 for the 24mm that will work. You might need to get a round file or a fine tooth round wood rasp to widen the holes a bit, but they will work. Plus this gives you a little lee way in “nudging” the hole in a certain direction for one mm in case you placed the hole a little off or you where slightly off center, and a chance to take the burr off the edges.


#16

Do they carry 24mm hole saw all i saw was 22 & 25…Would 25 work fine?


#17

if you guys want a super accurate and cheap way to make holes if making the case out of aluminum (i did on my stick), use a knock out punch type tool.

I wouldnt be surprised if this worked for thinner woods or even plexi glass, as the bit just cuts a circular hole.
May not be useful to the OP but perhaps will be useful for people in the future.


#18

Good idea, I’ve never seen one of them tools before, but I don’t think it’ll work for plexi, its too brittle and will probably just end up cracking.


#19

Depends on how thick the plexi more then not. i used it on a 2cm thick plexi and it cut fine. it was done very very very well secured and slowly.
But just another option for you guys!


#20

How slow? I want to get one to punch out a bunch of button holes in 1/4" plexi

-joe