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Drill press problems

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Forum topic by Dukebball7 posted 02-11-2016 02:50 AM 371 views 0 times favorited 10 replies Add to Favorites Watch
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Dukebball7

2 posts in 303 days


02-11-2016 02:50 AM

Topic tags/keywords: drill press problems

Hi all I am new to this but I need help. I have a 10 in harbor freight drill press that I have had for about 1 month now. With little bits that I have used, 1/4 up to 3/8, the drill press has been flawless. But I tried a 3-1/2 in Forstner bit on the lowest speed at 300 rpm and when I BARELY put pressure down to go into the wood the bit stops. I have opened the top and it has a 3 pulley system for 12 different speeds. The furthest pulley keeps running since it is connected to the motor, the middle pulley that connects the two keeps turning, but the pulley closest to the chuck stops spinning and so does the belt thus the chuck and bit stop. I have read that to tighten the set screw on one of the pulley and it is tight. Still new belts since I just got it a month ago. Please help. Thanks.


10 replies so far

View TheWoodRaccoon's profile

TheWoodRaccoon

364 posts in 397 days


#1 posted 02-11-2016 03:12 AM

A 3 1/2 inch forstner bit is asking a lot from your little 10” drill press. It sounds like the front belt is slipping, as it’s not under enough tension.

You should set it on the slowest speed, and don’t put as much downward pressure on the bit. Tighten the belts so they feel taught, but only just so. Also make sure your bit is sharp, and try again.

-- still trying to think of a clever signature......

View Dukebball7's profile

Dukebball7

2 posts in 303 days


#2 posted 02-11-2016 03:15 AM

It is on the lowest speeds at 300 rpm, I am BARELY pushing down, like one finger pressure, the belts are as tight as they go, and they are brand new bits.

View MadMark's profile

MadMark

978 posts in 920 days


#3 posted 02-11-2016 03:22 AM

Too much bit, too little drill press.

Most forstners have an edge cutter and a chipper. The chipper will tend to dig in when parallel to the grain. Is your cutter carbide?

I have the same size cutter and i found i had to bounce it thru the cut. Tap down until bind, release and repeat.

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

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bandit571

14628 posts in 2150 days


#4 posted 02-11-2016 03:47 AM

The 5 speed one I got awhile back from H-F, the front pulley ( of the two) did not even have a set screw installed.
$0.49 + tax to fix. It will stall out, but I also run the Forstner bits at full speed. One finger feed.

Might look inside the hole where the screw is supposed to be….

-- A Planer? I'M the planer, this is what I use

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TheWoodRaccoon

364 posts in 397 days


#5 posted 02-11-2016 04:57 AM



It is on the lowest speeds at 300 rpm, I am BARELY pushing down, like one finger pressure, the belts are as tight as they go, and they are brand new bits.

- Dukebball7

Try the highest speed then, with little pressure.

-- still trying to think of a clever signature......

View MrUnix's profile

MrUnix

4244 posts in 1666 days


#6 posted 02-11-2016 05:02 AM

Running a forstner bit too fast will quickly ruin it, and 3.5” is a pretty big hole to ask from that little press (the motor is 3.8A FLA, so what is that, maybe a 1/4hp?). If you are drilling a through hole and the material is not too thick, a hole saw would be a better option.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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716

502 posts in 383 days


#7 posted 02-11-2016 05:40 AM

Do you have smaller bits ? Try from a small one swapping it for a bigger progressively.

-- It's nice!

View BurlyBob's profile

BurlyBob

3695 posts in 1732 days


#8 posted 02-11-2016 05:55 AM

What Brad and Raccoon said. Remember if your going to a gun fight, take enough gun. Unfortunately you don’t have enough power in your drill press for that job and If you try to slowly run it and let the bit ride you’ll burn it up – scorch the metal and lose all the temper in it. Like Brad said a hole saw might be a better option.

View MadMark's profile

MadMark

978 posts in 920 days


#9 posted 02-11-2016 06:18 AM

716, you can’t easily drill progressively with forstners unless you can hold position while you change sizes. A centerless redrill will chatter like hell. It sounds feasable but its not. Now a stepped hole is easy because the centerpoint will automatically recenter on subsequent smaller drills.

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

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716

502 posts in 383 days


#10 posted 02-11-2016 06:24 AM


716, you can t easily drill progressively with forstners unless you can hold position while you change sizes. A centerless redrill will chatter like hell. It sounds feasable but its not. Now a stepped hole is easy because the centerpoint will automatically recenter on subsequent smaller drills.

M

- MadMark


I thought we were talking about a drill press not a hand drill, No ?

-- It's nice!

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