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Old 02-04-2019, 11:54 AM
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Default Boring a 2.5 hole with a Hougen mag drill

Over in the Fabrication forum I have been building an iron worker from the ground up. The main pivot axle is 2.5" diameter bore through the 1.5" steel frame and arm. The largest annular cutter I can find is a 2.375". I believe a 2.5 would fit in the drill without hitting the frame but I am not sure they make them that big. Each side plate of the frame weighs 500 pounds and it is difficult to move to a shop with bigger equipment and I really want to do it in my shop. How do I bore the last .125? I have seen line boring rigs for mag drills that utilize pilot bearings but the system alone cost more than the steel. Do you guys know if they make a 2.5" angular cutter for the Hougen with a .75" shaft?
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Old 02-04-2019, 12:14 PM
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Lu47Dan Lu47Dan is offline
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Mike, Amazon has some 2-1/2" × 2"
I searched "annular cutter 2 1/2 "
Dan.
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Old 02-04-2019, 01:03 PM
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Really! I have only been able to find 2.375 on Amazon. Can you attach the link to the Amazon page?
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Old 02-04-2019, 01:26 PM
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Is this what you were looking for?
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Old 02-04-2019, 01:32 PM
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Never mind I just found it on Amazon. Some reason on my home computer the search did not find it, but on my phone it went right to it.
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Old 02-04-2019, 01:43 PM
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Still have not figured how to do links on the smart phone, yet.
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Old 02-04-2019, 03:03 PM
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Quote:
Originally Posted by Barn Owl View Post
Never mind I just found it on Amazon. Some reason on my home computer the search did not find it, but on my phone it went right to it.
By the way, I have the cutter size your looking for, I had to buy one, don't spend more than you really need to... buy the cheap one it works as well as the higher priced ones just use cooling/cutting fluid and was what I did for 11 holes and it is still nice and sharp that was drilling through 1/2" plate
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Old 02-04-2019, 04:17 PM
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Originally Posted by MetalWolf View Post
... buy the cheap one it works as well as the higher priced ones...
If you are only drilling a handful of holes, fine go with a "cheap" hss cutter. If you have a number of holes to cut, need to drill thick material, or like to buy high quality tools buy the "higher priced" carbide tipped cutters. You typically get what you pay for in this case - it's not a conspiracy against your wallet.

Yes, use coolant unless you enjoy throwing fist fulls of cash away, in which case throw it this way!

Apply a steady feed at a rate your drill can handle.

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  #9  
Old 02-04-2019, 05:00 PM
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Quote:
Originally Posted by JBFab View Post
If you are only drilling a handful of holes, fine go with a "cheap" hss cutter. If you have a number of holes to cut, need to drill thick material, or like to buy high quality tools buy the "higher priced" carbide tipped cutters. You typically get what you pay for in this case - it's not a conspiracy against your wallet.

Yes, use coolant unless you enjoy throwing fist fulls of cash away, in which case throw it this way!

Apply a steady feed at a rate your drill can handle.

Sent from my XT1650 using ShopFloorTalk mobile app
I have both German made and chap carbide annulated cutters I just suggested the cheap one I that size if just the couple of so holes and coolant and it will do the job and then some... I just bought the cheap one in that size he needs for 11 holes in half-inch plate slow feed and coolant works
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  #10  
Old 02-04-2019, 05:25 PM
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The Hougen cutters I found on Amazon last week that were 2.375" were around $300! The one that Dan found is the "cheap" version at $158.00, but they were the correct size. I have only three holes to bore but the thickness is what is going to tax the cutter.
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"Yes, we did produce a near perfect Republic. But will they keep it? Or will they in their enjoyment of plenty, lose the memory of freedom? Material abundance without character is the surest way to destruction. Indeed, I tremble for my country when I reflect that God is just."

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If you spent 1 million dollars every day from the time Christ walked the earth until now, you still would not have spent 1 trillion dollars!
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