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View Full Version : Tightening a drill press quill.



J Harp
01-19-2012, 10:23 PM
I got this little press several years ago for a bit less than $40.00.



It's handy for smaller holes, I just put it on the bench to use it, then put it back out of the way when done with it.

Originally the quill was so loose it would rattle around pretty badly. To fix it I marked out and chain drilled for an opening in the bottom of the head, back of the quill bore. A few hits with a hammer knocked out the waste, I used files and a mounted stone in an electric drill to clean up the edge of the hole. That hole was to give access for splitting the casting, and to let the casting flex when a pinch bolt was tightened.

I cut through the internal wall if the casting the hard way with a loose hacksaw blade with a small handle clamped on the end. All the internal webs were cut through into the bore.


Next order was to block the casting up as level as I could and drill through both sides with the larger DP, for a 5/16th pinch bolt. I found later that I didn't have it very well leveled, but who's going to notice a hundred years from now.


After reassembly, I tightened the bolt so that the spring would just raise the quill and I couldn't feel any side shake. That made it a much more friendly machine to use.


Edit; Well I see I still don't know how to post images. I don't post them often enough to remember how. I'll try to repost them later.

J Tiers
01-19-2012, 10:37 PM
Unfortunately, all your pictures come out at about 1 inch by 1.25 inches, too blamed small to see.... I note that they are labeled "small" in their titles....

You can safely use VGA picture sizing, or thereabouts.... 640 x 480 is fine, and the usual forum will take a bit bigger also. At that sizeing they should come out about 3 x 5 or so, easily seen.

Black_Moons
01-19-2012, 10:52 PM
It looks like you copyed the URL of each thumbnail. You need open the page the image shows up on and copy the URL from there instead.

Arcane
01-19-2012, 11:02 PM
A small change fixes the size problem.
I got this little press several years ago for a bit less than $40.00.

https://lh6.googleusercontent.com/-8WeTITVAcqY/TxjM_ZZwJ7I/AAAAAAAAAB4/2Rb23dbkrb8/s144

It's handy for smaller holes, I just put it on the bench to use it, then put it back out of the way when done with it.

Originally the quill was so loose it would rattle around pretty badly. To fix it I marked out and chain drilled for an opening in the bottom of the head, back of the quill bore. A few hits with a hammer knocked out the waste, I used files and a mounted stone in an electric drill to clean up the edge of the hole. That hole was to give access for splitting the casting, and to let the casting flex when a pinch bolt was tightened.

https://lh5.googleusercontent.com/-AKH7R1F-wBI/TxhGtGCU5rI/AAAAAAAAABE/C3MqA768RjU/s144

https://lh4.googleusercontent.com/-8dhdE0xNG3w/TxhGuM4L8RI/AAAAAAAAABM/HrlLTUYkKN8/s144

I cut through the internal wall if the casting the hard way with a loose hacksaw blade with a small handle clamped on the end. All the internal webs were cut through into the bore.

https://lh6.googleusercontent.com/-vPFImzkD65s/TxhGus1rz5I/AAAAAAAAABQ/XA1eOHYZBPs/s144

https://lh4.googleusercontent.com/-Umt-rkuKRag/TxhGvMfDfGI/AAAAAAAAABU/LNVOULk3Wqk/s144

Next order was to block the casting up as level as I could and drill through both sides with the larger DP, for a 5/16th pinch bolt. I found later that I didn't have it very well leveled, but who's going to notice a hundred years from now.

https://lh6.googleusercontent.com/-fvtS5ueKSVw/TxhGvzP2ExI/AAAAAAAAABY/KcdlI7eZgB4/s144

After reassembly, I tightened the bolt so that the spring would just raise the quill and I couldn't feel any side shake. That made it a much more friendly machine to use.

https://lh3.googleusercontent.com/-KBiTCCIBcvA/TxhGwV_9UyI/AAAAAAAAABc/syJjSIdDiNo/s144

J Harp
01-19-2012, 11:05 PM
Sorry about the pictures, they have been giving me fits. I didn't want to post links, thought I would be posting images. I'll see if I can edit out the links and try to learn how to post images. It'll be a day or two, got other obligations tomorrow.

J Harp
01-19-2012, 11:15 PM
Thanks Arcane;

That's what I was seeing when I made the links. I need to study it more, but gotta hit the sack now, places to go and things to do tomorrow.

Black_Moons
01-19-2012, 11:26 PM
You can only post 4 images per post, but heres how:

You take the url and you put <IMG>http://Yoururlhere.com/something.jpg</IMG> tags around it

Except this board uses [ and not < but I can't use [ without it thinking its an image tag to be processed.

Or click the little button that looks like two grey mountains over a yellow backround (With a grey sun?..) and has the tooltip: "Insert Image" when you mouse over it (may need to 'enable scripted windows') when IE asks you)

Arcane
01-19-2012, 11:43 PM
BM, you mean like this? :D

http://Yoururlhere.com/something.jpg

JRouche
01-19-2012, 11:50 PM
I like all the work you put into that lil gem of a DP. Lookin good... JR

Evan
01-20-2012, 12:42 AM
Heh. Use the tags not to be parsed such as the / go here tags.

So, Arcane, how did I do that? :D

A little recursion goes a long way.

Black_Moons
01-20-2012, 12:44 AM
Ah, I used the Code tag, Assuming that code would'nt be parsed. It was, And ended up editing it to just use <>'s.

Arcane
01-20-2012, 12:49 AM
Heh. Use the tags not to be parsed such as the / go here tags.

So, Arcane, how did I do that? :D

A little recursion goes a long way.
I learned it from you quite a while back! Where you learned it is anyone's guess. :)

Evan
01-20-2012, 12:53 AM
I learned it from The Art of Computer Programming by Donald E. Knuth. It is the bible of computer programming.

http://www.amazon.com/Art-Computer-Programming-Volumes-Boxed/dp/0201485419

Davo J
01-20-2012, 03:35 AM
Looks like a good fix, thanks for sharing.

Dave

dian
01-20-2012, 07:42 AM
i will do the same thing, as soon as i find a slower motor.

sasquatch
01-20-2012, 08:58 AM
Interesting fix on the drill press slop!!

Thanks for posting the pics and info.

metalmagpie
01-20-2012, 09:21 AM
Interesting how you needed a drill press to fix your drill press. Funny how often that happens.

dian
01-20-2012, 12:48 PM
so i bought this today, was on sale.

http://i973.photobucket.com/albums/ae218/romandian/komode005.jpg

i got it for parts, mainly the two five stepped pulleys. the runnout of the bt tapper is 0.015 mm surprisingly, but the motor is a useles vibrator.

what i noticed, when disassembling things, is the "setscrew" just on the left of the magnetic base. it prevents the quill from rotating, but if tightened, it locks it in place. so as a quick fix i will put a handle instead of the screw on my similar bigger drill press. ill have to make another screw tough, as the original has a square end (weird) and doesnt rotate in the slot.

small.planes
01-20-2012, 01:28 PM
I did something similar, but less elegant a few years back:
http://i306.photobucket.com/albums/nn274/small_planes/SSC_2785.jpg

http://i306.photobucket.com/albums/nn274/small_planes/SSC_2784.jpg

Dave

J Harp
01-20-2012, 05:29 PM
Thanks for the comments. As for needing a DP to fix a DP, I think I could have done about as well with a hand held drill. I just rechecked, that is a 1/4" bolt not 5/16". there is a tiny bit of play in the quill now, probably wore the whiskers off.

I still haven't had a chance to study the image posting process, but I'm going to print the instructions given here, thank wou all for the help.

I can't find that mountain icon or anywhere that says insert image. Normally I use Firefox or Chrome browsers, whichever seems to be working better at the time, can't find it in IE either.

Mike Nash
01-20-2012, 06:09 PM
I bought a benchtop drill press around 23 years ago. The bench has to be pretty low however because it is fair sized. I admit to coming up with a less savvy "fix" for the loose quill though. I crammed a piece of UMHW plastic inside between the quill and the casting in front. It was tight enough compared to before that I've been happy with it.

J Harp
01-20-2012, 10:11 PM
Thats a benchtop doing the drilling in my picture. I think I posted quite a while ago on the rework I did on it. The upper bearing seat on the spindle was eccentric by several thousandths, and the morse taper was at an angle to the spindle centerline.

I turned down and sleeved the bearing seat, (tried for a shrink fit, got a locktite fit!). The spindle barely had enough metal for me to rebore the taper and get it straight. It's not perfect, but it's a lot better than it was.

dian
01-21-2012, 02:13 PM
the best thing to do is harps mod and the set screw tightening. other wise the quill, while fixed on the bottom, might moove on the top. unles you find a way to stabilise it at the top, with a bushing. that doesnt work on mine, because the "driveshaft" is square.