Do you think a serpentine belt style would have enough surface area not to slip? A couple car pulleys and a short belt...?
So damn tired of belt driven drill press!
YES, IM YELLING IN THIS POST! MY DRILL PRESS IS BELT DRIVEN LIKE MOST AND SLIPS WHEN USING LARGE BITS... LIKE MOST! AND I AM SICK OF IT!
So... Deap breath... whooooo......
Has any one converted their drill press to chain drive? I'll eventualy buy a mill and the drill press will get shit caned. But till then I don't want to spend any money on a new drill press. My problem is that the tention divice on my "black bull" $150 1/2hp drillpress is a joke... and even after I tapped the hole and swaped the plastic T-handle screw out to a 7/16 bolt, and using a cheater pipe to crank on the leaver, I still can't get enough tenssion to keep the NEW belts to stop slipping. The belt on this POS is a tiny V-drive and just does not have the serface area to gain enough traction on the pullies.
SO, Anyone ever converted their drill press to chain drive? Yah it may be a litte dangerous. But hay it's only 1/2hp... It'll stall if things get to out of hand... pun inteded.
So... Deap breath... whooooo......
Has any one converted their drill press to chain drive? I'll eventualy buy a mill and the drill press will get shit caned. But till then I don't want to spend any money on a new drill press. My problem is that the tention divice on my "black bull" $150 1/2hp drillpress is a joke... and even after I tapped the hole and swaped the plastic T-handle screw out to a 7/16 bolt, and using a cheater pipe to crank on the leaver, I still can't get enough tenssion to keep the NEW belts to stop slipping. The belt on this POS is a tiny V-drive and just does not have the serface area to gain enough traction on the pullies.
SO, Anyone ever converted their drill press to chain drive? Yah it may be a litte dangerous. But hay it's only 1/2hp... It'll stall if things get to out of hand... pun inteded.
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Thought about that... but in order to get slow RPM I need a pully roughly 1.5" at the motor and I don't think they made anything that small for a car. I measued an Alt. pully and it's almost 2.5".Do you think a serpentine belt style would have enough surface area not to slip? A couple car pulleys and a short belt...?
in sure there are idlers that small.
is it a dirrect motor - chuck single belt system or is it a 2 belt motor-idler-chuck system?
rough up the pulleis with some nasty sander paper/pads....
is it a dirrect motor - chuck single belt system or is it a 2 belt motor-idler-chuck system?
rough up the pulleis with some nasty sander paper/pads....
2 belt system.in sure there are idlers that small.
is it a dirrect motor - chuck single belt system or is it a 2 belt motor-idler-chuck system?
rough up the pulleis with some nasty sander paper/pads....
The issue then would be my pullies would eat my belts... The belts are just to small. they are only 3/8" wide and the pullies are small diameter. IDK I may try it though, I dried that sticky belt dressing stuff but it didn't help a whole lot.
with a horse and a half drill press just run some #50 chain and set it for the slowest speed you think you will need and be done
the formula for figuring out your spindle speed is 100( surface feet per minute ) X 4 divided by Drill diameter
so a 3/4 inch drill bit should be 533 rpm.....
take your motor RPM ( 1750? ) and divide your drive into your driven sprockets to determine the correct ratio ( try 3.5:1 or 35 teeth /10 teeth )
edit: only a half horse? maybe #40 chain would be better
the formula for figuring out your spindle speed is 100( surface feet per minute ) X 4 divided by Drill diameter
so a 3/4 inch drill bit should be 533 rpm.....
take your motor RPM ( 1750? ) and divide your drive into your driven sprockets to determine the correct ratio ( try 3.5:1 or 35 teeth /10 teeth )
edit: only a half horse? maybe #40 chain would be better
Thanks for the math.with a horse and a half drill press just run some #50 chain and set it for the slowest speed you think you will need and be done
the formula for figuring out your spindle speed is 100( surface feet per minute ) X 4 divided by Drill diameter
so a 3/4 inch drill bit should be 533 rpm.....
take your motor RPM ( 1750? ) and divide your drive into your driven sprockets to determine the correct ratio ( try 3.5:1 or 35 teeth /10 teeth )
edit: only a half horse? maybe #40 chain would be better
Here is the POS I bought.
Says 3/4 hores sorry. I knew it wasn't much. It's not really all that bad of a drill press... the runout is good and the speed is slow, it has some nice features and it's fairly nice for it's price. But just like my Ridged, and my "old" Chicago. The belts always slip. When I buy my mill it will be a gear head and I'll be done with this mess but, it's just not in the budget rigth now.
so you want the belts to grab.................but not too much?
belts are cheap and a good functioning machine is priceless regaurdless of price.
belts are cheap and a good functioning machine is priceless regaurdless of price.
Just curious how big of holes are you drilling with that drill press??
Then again for the price what do you really expect.
Then again for the price what do you really expect.
Tried it, didn't care for it much. Was noisy and stalled the motor instead of slipping the belt.
I think a cogged belt/pulley system would be pretty slick as that should stop any slipping. No idea on where to get them cheap though.
Browsing surplus center just now and dreaming gave me an idea... https://www.surpluscenter.com/item.asp?item=13-175-5-S&catname=powerTrans
Or https://www.surpluscenter.com/item.asp?item=13-133-5-56C-DE&catname=powerTrans
I think a cogged belt/pulley system would be pretty slick as that should stop any slipping. No idea on where to get them cheap though.
Browsing surplus center just now and dreaming gave me an idea... https://www.surpluscenter.com/item.asp?item=13-175-5-S&catname=powerTrans
Or https://www.surpluscenter.com/item.asp?item=13-133-5-56C-DE&catname=powerTrans
Someone on PBB made a gear reduction for a drill press. It was a 2:1 or similar that hung off of the factory housing. Just an idea.
5/8-1" and hole saws for doing dimple die work.Just curious how big of holes are you drilling with that drill press??
Then again for the price what do you really expect.
and I expect a belt system that works... even the serpentine system on my Ridged did the same bull shit.
You could try a tensioner or larger diameter pulleys. Hell if you want we could probly whip you up a set of stepdown 6 rib serpentine pulleys.
Does that come free with my new plasma table... I gotta' call you latter to finish that deal anyway, I'll pressure you then. :flipoff2:You could try a tensioner or larger diameter pulleys. Hell if you want we could probly whip you up a set of stepdown 6 rib serpentine pulleys.
I was having a similar problem on my Crapsman Drill press and was thinking that the belts were slipping. Opened up the cover once and found out the belts were still turning but the spindle was not spinning. Found a lock nut that was not tight and got that fixed. Might be your problem. I have drilled up to 7/8" holes in 1/2" thick plate and unless you put too much down pressure on the drill bit the belts do not slip.
Try some belt dressing. Could help them grab better.
Try some belt dressing. Could help them grab better.
Overtightening the belt is not a good solution.. you're just stretching the belt and possibly springing the spindle. Adding a gear reduction or another pulley/belt with jack shaft would be your best bet if you are dead set on making this one work.
I doubt you'll ever be very succesful drilling 5/8" + holes with that little thing though.. not without a lot of aggrivation at least. You will be much better off searching around for a good used heavy duty drill press instead of wasting time/money on this one. Little drill presses are great to have for small work, but most are limited to drilling 1/2" and smaller holes.
I doubt you'll ever be very succesful drilling 5/8" + holes with that little thing though.. not without a lot of aggrivation at least. You will be much better off searching around for a good used heavy duty drill press instead of wasting time/money on this one. Little drill presses are great to have for small work, but most are limited to drilling 1/2" and smaller holes.
Your drill press is too small, end of story.
If you increase the holding power of the belts, or go to a chain drive, it will bend shit the first time a drill bit or hole saw catches. Most likely the motor spindle.
Keep that one around for smaller stuff and look into a larger industrial drill press or a mill.
If you increase the holding power of the belts, or go to a chain drive, it will bend shit the first time a drill bit or hole saw catches. Most likely the motor spindle.
Keep that one around for smaller stuff and look into a larger industrial drill press or a mill.
I'm just trying to get by. I can get a chain and the sprockets from my buddies motorcycle shop for next to tothing... (used pull off stuff) and was asking if anyone had done it. I know it wont bend the shaft or anything... the moter may stall but it doesn't have the power to do any damage to its self.Your drill press is too small, end of story.
If you increase the holding power of the belts, or go to a chain drive, it will bend shit the first time a drill bit or hole saw catches. Most likely the motor spindle.
Keep that one around for smaller stuff and look into a larger industrial drill press or a mill.
I am buying a fork lift and plasma table this week so a new drill press or mill aren't in the budget right now. Once I save some more tool money I'll be buying something gear driven, 220v powered. But in the mean time I just want this thing to be less of a PIA. I don't know I'll probably just leave it be and keep thoughing out vulger language.
FWIW, I have at least one alternator pulley that is that small from when I built my custom accessory dress. That said, building up a stack of alternator pullies is pretty hack, and you might do better just turning down a hunk of aluminum round stock to do what you need. See if MC is serious... but a bigger drill press is probably cheaper unless you have free shop time.Thought about that... but in order to get slow RPM I need a pully roughly 1.5" at the motor and I don't think they made anything that small for a car.
FWIW, Carl's solution of bigger idlers to enforce a larger length of belt wrap is what it took to avoid belt squeal/slip on my Ford motor. Idlers are pretty easy to position, especially flat ones that run on the back side of the belt...
Randii
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