Radial arm drills are awesome. There's been one in my professional life forever. Don't be afraid to use it hard. I mean hard. 1 1/4"? No problem. Put the bit in, give the plate a good centre pop, line the plate up on packers, fix to bed. Hit auto feed. Done. Don't even need oil or pilot. The swarf will carry away the heat (see it come off blue). That's in really good condition, I'm envious.
Thanks for watching, and thank you for the rough steps! I haven't experimented with the auto-feed yet, but I definitely want to. It's impressive to me the automation they were building into these machines back then.
Thanks so much, Paul - appreciate the kind words and the subscription! I've been to Orlando once in December - was magical to leave cold and snowy Pittsburgh and get off the plane in Florida : )
@@rckclmbr85 hah, I used to take my vacations in January and go to Cleveland......have fun with that radial arm drill, hope you can view the Brown and Sharpe video I sent a link to you, your drill rpm's are the key to good drilling and not destroying your expensive drill bits and end mills, reamers, countersinks, and spot facers......best wishes, Paul
Well that's some great news - thank you! That's a skill I need to learn a bit about before attempting it. And thanks for sacrificing your responsibilities to watch this! : )
who on earth pre "destroyed" that bit with a... 80 degree tip angle? i would grind the end of that and resharpen it simply as its too embarrassing to allow it out in public... (lol, i have one sharpened to about 50 degrees so i cant talk... its for a specific use!) the bigger the bit, the easier it is to resharpen. its below 2MM that i usually dont try rescuing them. and sometimes i do, its better than an hour and half round trip to the hardware... you have a whole 6 inches of drill bit there to practice on... large drill bits dont come cheap. and these days, the new ones are junk.... hang on to the old ones and keep grinding til theres nothing left... dont run them so fast without coolant. thats called "clenched butthole" type speed... the inevitable is about to happen. its painful to watch. should be able to count the revolutions when you get to an inch... give or take. drills shouldnt scream... place clamps on TOP of the packing material. even for drilling a simple plate. hanging out in space all you do is warp material, and cant generate any actual clamping force. pilot drills, if needed, should only be slightly larger than the web of the large drill... i prefer thinning the web, a lot easier to do on a big drill anyway. and necessary as they get shorter... it gets thicker closer to the shank.
Thank you for all this info and for watching! That's the way they came to me - but I am certainly going to try grinding them. New ones are expensive and as you said there's a lot of material to play with. Will be a good skill to have moving forward as well.
Radial arm drills are awesome. There's been one in my professional life forever. Don't be afraid to use it hard. I mean hard. 1 1/4"? No problem. Put the bit in, give the plate a good centre pop, line the plate up on packers, fix to bed. Hit auto feed. Done. Don't even need oil or pilot. The swarf will carry away the heat (see it come off blue). That's in really good condition, I'm envious.
Thanks for watching, and thank you for the rough steps! I haven't experimented with the auto-feed yet, but I definitely want to. It's impressive to me the automation they were building into these machines back then.
enjoying your channel as a new subscriber, cheers from Orlando, FL, Paul
Thanks so much, Paul - appreciate the kind words and the subscription! I've been to Orlando once in December - was magical to leave cold and snowy Pittsburgh and get off the plane in Florida : )
@@rckclmbr85 hah, I used to take my vacations in January and go to Cleveland......have fun with that radial arm drill, hope you can view the Brown and Sharpe video I sent a link to you, your drill rpm's are the key to good drilling and not destroying your expensive drill bits and end mills, reamers, countersinks, and spot facers......best wishes, Paul
Thanks so much, Paul - really appreciate the engagement and the advice - lots to learn over here!
Haven't watched the whole video yet (I should be doing other things rn) But I'm 100% sure both drill bits at 6:50 can just be reground :)
Well that's some great news - thank you! That's a skill I need to learn a bit about before attempting it. And thanks for sacrificing your responsibilities to watch this! : )
I cried at 4:48.........
who on earth pre "destroyed" that bit with a... 80 degree tip angle? i would grind the end of that and resharpen it simply as its too embarrassing to allow it out in public... (lol, i have one sharpened to about 50 degrees so i cant talk... its for a specific use!)
the bigger the bit, the easier it is to resharpen.
its below 2MM that i usually dont try rescuing them. and sometimes i do, its better than an hour and half round trip to the hardware...
you have a whole 6 inches of drill bit there to practice on... large drill bits dont come cheap. and these days, the new ones are junk.... hang on to the old ones and keep grinding til theres nothing left...
dont run them so fast without coolant. thats called "clenched butthole" type speed... the inevitable is about to happen. its painful to watch. should be able to count the revolutions when you get to an inch... give or take. drills shouldnt scream...
place clamps on TOP of the packing material. even for drilling a simple plate. hanging out in space all you do is warp material, and cant generate any actual clamping force.
pilot drills, if needed, should only be slightly larger than the web of the large drill... i prefer thinning the web, a lot easier to do on a big drill anyway. and necessary as they get shorter... it gets thicker closer to the shank.
Thank you for all this info and for watching! That's the way they came to me - but I am certainly going to try grinding them. New ones are expensive and as you said there's a lot of material to play with. Will be a good skill to have moving forward as well.