Sat Oct 05, 2013 3:10 pm
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Sun Oct 06, 2013 5:51 am
Rick,at the moment 5/8 and 3/4 ...3/8inch steel plate...I have a TSC drill press, not sure of the model but it was in the 200 dollar range....Has quite a few pulley arrangements...Funny I drilled holes for my splitting stands and 2 stands of the 3 drilled fine...The third set I had problems with after 4 holes and put in a new drill bit ( same manufacturer)....still had problem...I was thinking the steel may have been of different stock and harder than the previous...( I had the welding shop cut it to size for me so I don't know if they got it from the same piece or not)....Anyhow thanks, I am thinking it is exactly as you said with heat being the biggest problem...I'll look up a chart....ricky racer wrote:Don't know about drill sharpeners but I do know that the larger diameter drill you use, the slower the drill bit has to turn. Once you get over 1/2", most home drill presses run the spindle way to fast and will quickly burn up the bit. You should be able to find a drill speed chart on-line easy enough. The hard part will be finding a drill press that will operate on 120 or 240 volts that will run slow enough to give you the spindle speed you need. Most that I'm aware of are single phase 480 volt units. It might be possible to step the speed down with a different pulley arrangement.
Step drills are great for thin metals, sheet metal and the like but don't well on thicker material.
What size holes are you wanting to drill?
Sun Oct 06, 2013 6:01 am
Thanks Kenbrandt, I have been using bullet type....It doesn't even list them for over 1/2 inch....I'll find some twist bits...Good info thanks ( yeh, my Dad had an old Sears 1/2 inch (new to him ) that you could count the lines on the chuck as it rotated....But God forbid you hung it up )PVF1799 wrote:I found this comprehensive list online. Back when I was young we did not have a drill press - we used a MONSTER drill that was gear drive reduced for the big drills - we still have it in the Magic Barn somewhere - I know it turned damn slow for big drills.
Sun Oct 06, 2013 6:09 am
Eugene wrote:Nother edit: Titanium drill bits , waste of money.
Bob Perry wrote: I get frustrated with how much the big bits cost and how they don't last.
Thanks guys, learned a lot here today... DaveJohn *.?-!.* cub owner wrote:I agree to what has been said, and do like the Drill Dr., but it gets pricey when you get one big enough for the larger bits.
Sun Oct 06, 2013 11:35 am
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Sun Oct 06, 2013 6:15 pm
grumpy wrote:As a side note, the hardest steel I've worked with is old time bed rails
Sun Oct 06, 2013 8:08 pm
I own the 3/4" Drill Doctor. Currently listed on the internet for $140- US.Rudi wrote:I think I am going to look at a Drill Doctor 750X
Sun Oct 06, 2013 9:05 pm