drilling holes

[Iplayfarmer]

Yes, use the right tool for the job. I always clamp the work to the table. All ways.

Amen!

A chunk of steel stuck to a bit rotating at 400 RPM is scary.

 

[J_J]

I came across this while searching for cutting fluids.

Drill Bit
Lubrication Method
Squirt Bottle ----------------------------2
Hose -------------------------------------3
Clay Dam ------------------------------ 4
Under Water ---------------------------4
Squirt Bottle w/pumping action ------6
Clay Dam w/pumping action ---------10
Under Water w/pumping action ---- 10
Water Feed ----------------------------10
Rating
(1 poor - 10 good)

 

[grsthegreat]

I'd recommend a drill doctor.

Amazon.com: Drill Doctor DD750X Drill Bit Sharpener: Home Improvement

i second this... i love my drill doctor. its real easy to use, and the drill bits are always sharp.

i use lots of cutting oil when drilling, but a sharp bit cant be beat.

 

[grsthegreat]

This link shows the RPM formula I was taught to use.
Calculating Cutting Speeds for Twist Drills

As for cutting fluids, I like to use products that were formulated for the job even if nothing more than Rigid thread cutting oil. An easy application method is to hold a small oil saturated brush against the drill bit as it rotates.

To avoid serious injury, clamp the work to the press table when using larger bits on some applications. You be the judge there.

i bought a Rigid oiler years ago, and it works great..but messy. I like your idea of the oil soaked brush. i think im going to try that next time i use the drill press

 

[SPYDERLK]

This link shows the RPM formula I was taught to use.
Calculating Cutting Speeds for Twist Drills

As for cutting fluids, I like to use products that were formulated for the job even if nothing more than Rigid thread cutting oil. An easy application method is to hold a small oil saturated brush against the drill bit as it rotates.

To avoid serious injury, clamp the work to the press table when using larger bits on some applications. You be the judge there.

I cant imagine a home setup, even on a good solid drill press or mill that would drill a 1" hole well at 400 rpm in steel. 100 rpm or slower works well.
larry

 

[toy]

Has any body heard of a Hanson Heavy duty drill press? I have been searching and can't find any information about them.

 

[Grayson Klassen]

I was just wondering how long it should take to drill a hole in 1/4". I have some harbor freight silver and deming metal bits. To cut 3/4" hole on my drill press at 300 rpm's it took about ten or more minutes each hole. Is that about right?

I drilled 8 x 1-1/8 holes in 1/2 inch plate from a 7/8 pilot in 20 minutes it took me longet to pilot from 1/4 to 1/2 to 7/8 but not by muchsay all in an hour and they are matched holes in four different plates.

Did you pilot your holes with a smaller bit? If you did your bit must be dullllllllllllllllllllllllllllll