Heavy drillin

[BobnUt]

Just curious... because of the 'mag drill thread'
I have a Hougen Mag drill, which is awesome for 1/2" or larger
I also have a floor drill press for smaller bits
So, could a guy put a annular cutter from a mag drill in a drill press and achieve superior results?

 

[Jim.ME]

Just curious... because of the 'mag drill thread'
I have a Hougen Mag drill, which is awesome for 1/2" or larger
I also have a floor drill press for smaller bits
So, could a guy put a annular cutter from a mag drill in a drill press and achieve superior results?

They make different adapters, so yes, a cutter with can be used on a drill press by using an adapter. Type of adapter required will vary with the drill press arbor/chuck arrangement and cutter shank.

 

[DoubleO7]

Most drill presses for "home owner" use are built for woodworking. With speeds that are generally to high for proper (drill life) drilling of metal at diameters of more than the chuck size that they come with.

 

[Russ from MN]

A good quality hole saw (Milwakiee, Lenox) for larger than 1/2" works just fine. I use old motor oil as lubricant and to clear the chips. Lower cost than a 1" twist drill. I've drilled plenty of 1", 1 1/4, 1 1/2" holes through thick steel and cast iron no problem. I use a floor mount drill press at low speed.

I have found hole saws to usually drill oversize holes, something I usually don't want, that is the one time i will step drill, then you usually get a hole the exact size of the drill. But you have to be very careful with the feed, so the drill doesn't screw itself into the hole.

 

[Leroy]

Bought what i thought was a good size drill press from Grizzly that stated 1 1/4 capacity but belt slips no matter how tight when hard drilling -/ what do I need to drill 1 inch hole in 1 inch thick steel with out it stalling a. Bridgeport seems overkill

My drill press do not remember make for sure but thinking it was TS. Slowest speed was double what should have been for normal items with vet a slower speed. Could not get puleys to slow it down to what was needed and then belt was only a 3/8 inch and could not even find replacement belts. All tools gone now.

 

[used red MN]

I have been around a couple of those styles of drill presses. You said the belt slipped no matter how tight it is. That belt tightening apparatus leaves something to be desired. You may need to get a pry bar between the motor and the frame and slide a chisel in there to hold the belt temporarily fiddle string tight while you drill these larger holes. Unfortunately, an easily operated tensioner that accommodates quick speed changes and a “good” tensioner system are hard to fit together. It works fine for the majority of the drilling a medium duty drill press is used for. It is unfortunate that you need to spend $1200 only to get an “imported” medium quality drill press.

 

[BarnyardEngineering]

Make sure your belts are actually tight, and you're not running out of adjustment. Both belts should be tight enough to play a tune on them. You may need to change out one or both belts for a slightly shorter belt.

I had this problem on a 16-speed drill press. It has two belts, one from the motor to an intermediate pulley, and the other from that pulley to the spindle. No matter how tight I made the motor belt, the spindle belt would slip. After I changed out the spindle belt for one the next size smaller, I could get both belts TIGHT, and it never slipped again. The intermediate pulley was running out of travel before the spindle belt got tight.

Put the drill press on its lowest speed and LEAVE IT. Even the lowest speed on most drill presses is way too fast to drill a 1" hole in steel but you don't have any other choice. Heck it's too fast to drill holes in steel of most any size.

 

[flying belgian]

Bought what i thought was a good size drill press from Grizzly that stated 1 1/4 capacity but belt slips no matter how tight when hard drilling -/ what do I need to drill 1 inch hole in 1 inch thick steel with out it stalling a. Bridgeport seems overkill

I agree with all those that said your belts are wore out.

 

[BobnUt]

Here's another question...
Could you use a Variable Voltage Transformer to slow the speed ?
or would it damage the motor.
I have used one on a blower for the woodstove for years without a problem.

 

[Janicholson]

Here's another question...
Could you use a Variable Voltage Transformer to slow the speed ?
or would it damage the motor.
I have used one on a blower for the woodstove for years without a problem.

That would only slow it if it were a brushed "universal" motor. The motor is likely a frequency dependent style with 60hz determining its speed. the lower voltage would make it less powerful.
Your application is OK. Jim

 

[Phil T]

It may be overkill, but it sure does make short work of those jobs.View attachment 92690

I envy your shop always wanted a Bridgeport of my own. We had one at work and used it a lot. All I have now is a lathe with a bunch of attachments and a drill press with x & y axis vise.

 

[drsportster]

H-F drill press I just got this to replace a failed unit Can do anything you need .

 

[DoubleO7]

H-F drill press I just got this to replace a failed unit Can do anything you need .

Minimum speed is about twice as fast as his need.

 

[BarnyardEngineering]

Here's another question...
Could you use a Variable Voltage Transformer to slow the speed ?
or would it damage the motor.
I have used one on a blower for the woodstove for years without a problem.

Won't damage the motor, but you won't have any torque either. The motor will just stall.

 

[BarnyardEngineering]

H-F drill press I just got this to replace a failed unit Can do anything you need .

I saw that in the store yesterday. Speed range is 580-3200 RPM so way too fast to drill a 1" hole in steel.

 

[ss55]

Bought what i thought was a good size drill press from Grizzly that stated 1 1/4 capacity but belt slips no matter how tight when hard drilling -/ what do I need to drill 1 inch hole in 1 inch thick steel with out it stalling a. Bridgeport seems overkill

What would a welding shop or machine shop charge to drill the hole? For a one time deal is pays to let someone else do it.

Other considerations for them to write a quote are
how many holes need to be drilled
material: 1020 mild steel or hardened 4340?
precision: location and diameter
surface finish:
weight of part to be handled:

 

[bfullmer]

Those old time 1/2 corded drill with 2 handles would spin you around on a creeper or standing up would break your arm how come big giant motor on drill press doesn’t have that kind of power

 

[Fritz Maurer]

Speed needs to be 350 rpm or less

Precisely... I was gonna say around 80

 

[Fritz Maurer]

Those old time 1/2 corded drill with 2 handles would spin you around on a creeper or standing up would break your arm how come big giant motor on drill press doesn’t have that kind of power

It would if it had all the reduction gearing that the 1/2 inch hand drill has.

 

[SkipperII]

Those old time 1/2 corded drill with 2 handles would spin you around on a creeper or standing up would break your arm how come big giant motor on drill press doesn’t have that kind of power

My dad had an old Monkey Wards 1/2" hand drill. It used an allen wrench to tighten the clutch. We mounted it to one of those aftermarket press stands. One day it caught, and made a twisted piece of art out of the stand. Those things were amazingly powerful.