08-25-2020, 04:24 PM
|
#1
|
|
Franchise Player
Join Date: Jan 2010
Location: Calgary
|
Advice Needed - Metal Drilling
Hey, CP brain trust.
I have to expand a 5mm existing hole to an 8mm diameter hole in a metal disk, in order to glue-in a threaded insert into it. Top of the insert is 11mm. The disk is 100m in diameter; it is heavy and magnetic; feels like steel with metallic paint on it.
It is very important that the hole remains 100% centered and vertical. I can't come up with an idea for how to secure both the drill and the disk in place co-axially for drilling without running the risk of either one of them kicking and ruining the disk.
I have drills/bits and vise grips in my garage. Also have a wood-turning lathe, but unsure if it's of any use in this case.
Any meaningful suggestions from guys familiar with machining would be very much appreciated.
__________________
"An idea is always a generalization, and generalization is a property of thinking. To generalize means to think." Georg Hegel
“To generalize is to be an idiot.” William Blake
|
|
|
|
08-25-2020, 04:27 PM
|
#2
|
|
Powerplay Quarterback
Join Date: Jul 2007
Location: St. Albert
|
Find someone with a drill press.
|
|
|
|
|
The Following 6 Users Say Thank You to DFO For This Useful Post:
|
|
|
08-25-2020, 04:35 PM
|
#3
|
|
Franchise Player
Join Date: Jan 2010
Location: east van
|
Quote:
Originally Posted by DFO
Find someone with a drill press.
|
A good drill press
|
|
|
|
The Following User Says Thank You to afc wimbledon For This Useful Post:
|
|
|
08-25-2020, 04:47 PM
|
#4
|
|
#1 Goaltender
|
Mini-square/pocket square/small speed square will get you pretty damn close. Small enough square that it fits between the chuck of the drill and the work surface, using it to backstop the bit. Use the centre line (if it has one) or the narrow straight edge as your other axis guide.
__________________
No, no…I’m not sloppy, or lazy. This is a sign of the boredom.
|
|
|
|
|
08-25-2020, 04:52 PM
|
#5
|
|
Franchise Player
|
30.06 at 50 paces. God bless.
|
|
|
|
|
The Following User Says Thank You to OMG!WTF! For This Useful Post:
|
|
|
08-25-2020, 04:53 PM
|
#6
|
|
Franchise Player
Join Date: Jan 2010
Location: Calgary
|
How can you guide a hand drill with a speed-square?
__________________
"An idea is always a generalization, and generalization is a property of thinking. To generalize means to think." Georg Hegel
“To generalize is to be an idiot.” William Blake
|
|
|
|
|
08-25-2020, 06:04 PM
|
#7
|
|
#1 Goaltender
|
Usual speed square with an 8mm bit, probably not? But if you have a small square, you just use the use it as a guide for the bit. It’ll keep you check on one axis, use your eyes on the other.
I mean, that disc looks fairly small, and there’s a lip that’ll actually sit flush around the surface when it’s installed, and it’s knurled. Taking it to a machine shop seems unnecessary?
__________________
No, no…I’m not sloppy, or lazy. This is a sign of the boredom.
|
|
|
|
|
08-25-2020, 08:00 PM
|
#8
|
|
Franchise Player
Join Date: Jan 2010
Location: Calgary
|
Quote:
Originally Posted by 81MC
Usual speed square with an 8mm bit, probably not? But if you have a small square, you just use the use it as a guide for the bit. It’ll keep you check on one axis, use your eyes on the other.
|
Oh, I see what you mean. No, that wouldn't work, unfortunately. The back side of the disk is curved. I need to secure it in place solidly somehow. It must be 100% centered and straight. Drill press with 5" horizontal vise grip is probably the right answer, but I am still hopeful for the CP ingenuity solution. 
__________________
"An idea is always a generalization, and generalization is a property of thinking. To generalize means to think." Georg Hegel
“To generalize is to be an idiot.” William Blake
|
|
|
|
|
08-25-2020, 08:28 PM
|
#9
|
|
Franchise Player
Join Date: Jul 2003
Location: In my office, at the Ministry of Awesome!
|
__________________
THE SHANTZ WILL RISE AGAIN.
 <-----Check the Badge bitches. You want some Awesome, you come to me!
|
|
|
|
|
08-25-2020, 09:58 PM
|
#10
|
|
Craig McTavish' Merkin
|
My brother's a machinist. I'll ask him but his solution will probably involve a 5-axis CNC.
|
|
|
|
|
The Following 2 Users Say Thank You to DownInFlames For This Useful Post:
|
|
|
08-25-2020, 11:07 PM
|
#11
|
|
The new goggles also do nothing.
Join Date: Oct 2001
Location: Calgary
|
If a 5-axis CNC is wrong I don't want to be right.
__________________
Uncertainty is an uncomfortable position.
But certainty is an absurd one.
|
|
|
|
|
The Following 4 Users Say Thank You to photon For This Useful Post:
|
|
|
08-26-2020, 02:39 AM
|
#12
|
|
First Line Centre
Join Date: Nov 2010
Location: Sherwood Park, AB
|
Am I misreading this? You're just making the existing hole bigger right?
If so, just vice grip the plate down and drill it out with a drill. The existing hole will keep you centered no problem, you would only need a drill press if there was no hole already.
|
|
|
|
|
08-28-2020, 01:55 AM
|
#13
|
|
Franchise Player
|
Could you use plastic or wood to make a similar sized circle, drill and test the centering, then clamp to the disc to use as a guide?
|
|
|
|
|
The Following User Says Thank You to DoubleF For This Useful Post:
|
|
|
08-28-2020, 07:06 AM
|
#14
|
|
Scoring Winger
Join Date: Feb 2012
Location: In the prairies, surrounded by sheep
|
Don't go straight from 5mm to 8mm. Get a range of bit sizes and slowly work your way up to the desired size
|
|
|
|
|
08-28-2020, 07:08 AM
|
#15
|
|
Franchise Player
|
I think the stepper bit would be the way to go, the only issue being if the hole depth is thicker than the stepper bit's step it won't work. Unless you can also come from the bottom, and get it halfway each side.
|
|
|
|
|
08-28-2020, 09:31 AM
|
#16
|
|
Such a pretty girl!
Join Date: Jan 2004
Location: Calgary
|
I don't see mention of the thickness of the plate, what is it?
Looks thin in the photo, but hard to tell. If it's not too thick, the flange on the insert will make it vertical when pressed in, and if the existing hole is already centered, using a drill shouldn't be a problem.
__________________
|
|
|
|
|
08-28-2020, 09:56 AM
|
#18
|
|
Franchise Player
Join Date: Feb 2011
Location: Somewhere down the crazy river.
|
Do you normally glue in threaded inserts? I thought they were pressed in? Would it be easier to just tap the hole so whatever you thread in there can be done directly?
Last edited by Wormius; 08-28-2020 at 09:58 AM.
|
|
|
|
|
08-28-2020, 01:41 PM
|
#19
|
|
Franchise Player
Join Date: Oct 2005
Location: https://homestars.com/companies/2808346-keith-my-furnace-guy
|
Recently heard the edges of your hole should be smooth and not rough and don't know why.
|
|
|
|
|
08-28-2020, 11:11 PM
|
#20
|
|
Franchise Player
Join Date: Jan 2010
Location: Calgary
|
Quote:
Originally Posted by GGG
|
Nah. I thought so too. After doing some reading, people say these are really wobbly, which defeats the purpose. Bought a small drill press and table grip on kijiji today for $80. Should do the trick, I hope.
__________________
"An idea is always a generalization, and generalization is a property of thinking. To generalize means to think." Georg Hegel
“To generalize is to be an idiot.” William Blake
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 09:22 AM.
|
|
