Intermediate sized holes, how to make them (what tool)?

@MikeInOr thanks for measuring that! :applause 2: Greatly appreciated. I need the 1.25" size. 0.2" steps would be great, then it would only be one pass in 1/8" stock. Guess I'll spend my HF gift card on some of those bits.
 
There are all kinds of ways to do this. If you have none of the necessary tools to do the job and you had to buy something, I think I would go with annular cutters. But if you have something that works, it may make sense to use it. Here's a link to how I made mine:

POTD- PROJECT OF THE DAY: What Did You Make In Your Shop Today?

Post #'s: 3,324 - 3,326 on Page 111.

There's probably an easier way to attach the link, but I don't know how to do it.

Regards,
Terry
 
tjb said:
POTD- PROJECT OF THE DAY: What Did You Make In Your Shop Today?
Post #'s: 3,324 - 3,326 on Page 111.
There's probably an easier way to attach the link, but I don't know how to do it.
Click to expand...

Here's how I do it (old version of firefox on win7) :

find the post you want to link to and hover the mouse cursor over the post number and right-click, and choose "copy link location"

Here it is in pictures (screen captures):

1599351042019.png



1599351084388.png

Then use the little chain icon (insert link button) to paste in the url.
1599351426447.png

Here's the direct link for post #3324:
https://www.hobby-machinist.com/thr...you-make-in-your-shop-today.67833/post-772678

and for post #3326:
https://www.hobby-machinist.com/thr...you-make-in-your-shop-today.67833/post-772737

-brino

EDIT: By the way, Great job on those Terry!
 
tjb said:
There are all kinds of ways to do this. If you have none of the necessary tools to do the job and you had to buy something, I think I would go with annular cutters. But if you have something that works, it may make sense to use it. Here's a link to how I made mine:

POTD- PROJECT OF THE DAY: What Did You Make In Your Shop Today?

Post #'s: 3,324 - 3,326 on Page 111.

There's probably an easier way to attach the link, but I don't know how to do it.

Regards,
Terry
Click to expand...
Indeed. Just starting my machining journey, so really didn't have much tooling to choose from. Thanks for the link. Basically, I'm trying to fit my toolbox drawer as well. Hope mine come out as well as yours did!

I looked through what I had to see if there was something that would work and not kill me. Don't have a boring head yet. The step drill that I did have was junk. The biggest drill I have is 1/2". The Sherline flycutter I have is slightly too large in diameter, and really isn't made for boring. So I ended up with getting the annular cutter. Hope to have it late next week. Probably will buy a better step drill as well, as they seem like they could be handy for some things.
 
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I use bi-metal hole saws to cut both mild steel, stainless steel and aluminium in the drill press.
Very thick wood backing plate and strong clamps, slowest speed, spray coolant, lots of pecking to clear the debris.
The major problem I found was getting hole saws that dont scream.
My starret saws scream so are not used on metal but the Sutton tools ones are fast and relatively quiet.
Heres one cutting stainless steel. https://www.hobby-machinist.com/threads/the-giant-binocular.55688/post-653184
and mild steel in the lathe https://www.hobby-machinist.com/threads/the-giant-binocular.55688/post-619092
and lots of holes in aluminium https://www.hobby-machinist.com/threads/the-giant-binocular.55688/post-576613
 
@savarin Very cool telescope! My Dad ground his own mirror for a telescope, but as far as I know the rest of it was never built. I recently located the Foucault tester he built for testing the mirror. Still have the mirror as well.

I did look for a better quality hole saw, but it was more expensive than the annular cutter. The hole saws I have scream, grab, and do all sorts of frightening things. I wouldn't want to cut 40 precise holes with one. A couple of holes, maybe.
 
brino said:
Here's how I do it (old version of firefox on win7) :

find the post you want to link to and hover the mouse cursor over the post number and right-click, and choose "copy link location"

Here it is in pictures (screen captures):

View attachment 335962



View attachment 335963

Then use the little chain icon (insert link button) to paste in the url.
View attachment 335964

Here's the direct link for post #3324:
https://www.hobby-machinist.com/thr...you-make-in-your-shop-today.67833/post-772678

and for post #3326:
https://www.hobby-machinist.com/thr...you-make-in-your-shop-today.67833/post-772737

-brino

EDIT: By the way, Great job on those Terry!
Click to expand...
Thanks, Brino.

Learn something new everyday.

Regards,
Terry
 
WobblyHand said:
Indeed. Just starting my machining journey, so really didn't have much tooling to choose from. Thanks for the link. Basically, I'm trying to fit my toolbox drawer as well. Hope mine come out as well as yours did!

I looked through what I had to see if there was something that would work and not kill me. Don't have a boring head yet. The step drill that I did have was junk. The biggest drill I have is 1/2". The Sherline flycutter I have is slightly too large in diameter, and really isn't made for boring. So I ended up with getting the annular cutter. Hope to have it late next week. Probably will buy a better step drill as well, as they seem like they could be handy for some things.
Click to expand...
Good choice, in my opinion.

Please keep us posted.

Regards,
Terry
 
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