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Is .005 - .010 Runout on a DP Acceptable???

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Forum topic by DIYaholic posted 01-08-2015 03:29 PM 1294 views 0 times favorited 23 replies Add to Favorites Watch
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DIYaholic

19178 posts in 2139 days


01-08-2015 03:29 PM

Topic tags/keywords: question drill press delta 17-900

Looking at a Delta 17-900 DP, on Craigslist. The seller claims .005 – .010 runout.
I’m sure(?) that it is fine for woodworking….
I’m most curious as to whether that amount of runout is 1) typical of this model? 2) If not, could this indicate a potential problem with this unit? ie: bad bearings & or a bent arbor/shaft???

Here is the CL posting….
http://burlington.craigslist.org/tls/4836717605.html

Your collective wisdom, insight and opinions are appreciated.

Thank you, in advance, for the help and taking your time to reply!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?


23 replies so far

View patron's profile

patron

13537 posts in 2805 days


#1 posted 01-08-2015 03:50 PM

well son

it’s more than you have
and cheaper than they got

go get it
before i put on some clothes
and run-out to buy it myself

the top is nice
and could hold your beer if needed

besides that
it would look good in the shop

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View bigblockyeti's profile

bigblockyeti

3668 posts in 1185 days


#2 posted 01-08-2015 03:52 PM

First off, I’d want to know where he’s measuring the runout from. If he’s using a precision drill rod 3”-6” from where the chuck is mounted on the spindle then that’s not too bad. If he’s pulled the chuck off and measuring that right on the Jacobs taper part of the spindle then it’s too much and will result in significantly more at the tip of a drill bit when being used. Whether or not it’s typical or not for that particular model, couldn’t tell you, many drill presses of this size and price point I’ve dealt with will have very little. When you go to look at the unit, see how the runout is being measured and listen to it while running, many (not all but most) bearing problems give at least a little audible warning that something’s not right. Check it out good at the edges of the table and around the belt cover, those to areas seem to suffer the most if they fall over which can create other problems down the road.

View distrbd's profile

distrbd

2227 posts in 1911 days


#3 posted 01-08-2015 03:57 PM

I had an opportunity to buy that exact drill press model ,the seller told me the reason for selling it was:
“the amount of run-out was no longer acceptable for metal fabrication”
So the seller got it for free from where he worked and wanted to sell it as a woodworking DP,I passed up on that deal because of it.
.010” is the thickness of a business card so for woodworking purposes is not horrible.
But since it is a Delta,you probably could not find the parts for it to fix it.

-- Ken from Ontario, Canada

View johnstoneb's profile

johnstoneb

2143 posts in 1637 days


#4 posted 01-08-2015 03:58 PM

That’s not bad. I have that same DP and I would guess I have that in runout. I’ve never checked mine. Make sure it runs quietly and smoothly.

-- Bruce, Boise, ID

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DIYaholic

19178 posts in 2139 days


#5 posted 01-08-2015 04:02 PM

Dad,
I just spoke to the seller.
He is holding it until Saturday for me. It is a 2.5 hour drive.
I will use this trip as an excuse to go to Springfield, Mass….
& go to “The WoodWorking Show”!!!
Hmmm…. may need to bring more cash (& plastic)!!!

Mr. Yeti,
Or can I call you Mr. Big???
The seller is a machinist by trade. I’m hoping he is honest!!!
I will check the runout, when I view/test/purchase the drill press.
Thanks for the heads up, regarding slips & falls!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

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DIYaholic

19178 posts in 2139 days


#6 posted 01-08-2015 04:05 PM

Ken,
I did check eRaplacement parts….
Many parts are in fact discontinued.
Once inspected, I’ll make a final decision.
That and pieces parts can always be machined….

Thanks, for the input!!!

Bruce,
Thanks…. & will do.

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View distrbd's profile

distrbd

2227 posts in 1911 days


#7 posted 01-08-2015 04:17 PM

DIYaholic,please let us know how it goes ,and we need pictures.

-- Ken from Ontario, Canada

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DIYaholic

19178 posts in 2139 days


#8 posted 01-08-2015 04:22 PM

Ken,
I will, update, inform and visually document….
Since I believe this may constitute a tool gloat!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View Arlin Eastman's profile

Arlin Eastman

3555 posts in 2025 days


#9 posted 01-08-2015 04:23 PM

Randy

That is a good price. The runout is a bit high but is easily fixed. I have a DVD my Mark Duginsky about fixing woodworking equipment and he also covers that as well and I would loan it to you.

-- Please help me help other Vets click..> http://www.gofundme.com/m1abko.....It is always the right time, to do the right thing.

View Richard H's profile

Richard H

489 posts in 1145 days


#10 posted 01-08-2015 04:30 PM

I have that exact same drill press and I have never had issues with runout but I also have never measured it. I can drill out pen blanks and the copper sleeves fit snugly in the blank afterwards which is about the most precise thing I do with it.

The chuck is removable so I would expect unless those parts are very well machined there would be a little runout just from where those parts meet up wouldn’t there? It might be as easy as pulling the chuck out and cleaning the mating surfaces well to make sure they seat correctly.

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DIYaholic

19178 posts in 2139 days


#11 posted 01-08-2015 04:45 PM

Arlin,
I may just take you up on that offer.
I hope you are doing well!!!

Richard,
Thanks for the info & insight!!!
I too, will be drilling out pen blanks…
That and I have a 3” fostner bit I need to spin.
My little 1/4HP 10” Ryobi Bench Top machine just ain’t cutting it!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View MrRon's profile

MrRon

3926 posts in 2708 days


#12 posted 01-08-2015 07:24 PM

The run-out is not too bad for woodworking , but excessive for metal working. If the bearings are bad, they are easily replaced. If the spindle is bent, getting a replacement may be a problem. If it’s the chuck, a replacement chuck can be had. At any rate, $100 is a good price. I would go for it.

View Mainiac Matt 's profile

Mainiac Matt

5993 posts in 1793 days


#13 posted 01-08-2015 07:43 PM

The price is good and I’ve ran that standard Delta DP at work before we upgraded.

But I’d say he pulled that #out of his wazoo. If he actually measured TIR (total indicated runout) with a dial indicator, he would have a number…. not a range.

Personally…. I’d say .005” is on the boarder line of acceptable.

.010” is pretty sloppy, and you’ll visually see long bits visually wandering at low speeds.

If it’s not too far, take a nice long smooth shaft (if you have an edge guide for your router, one of the shafts might work well) or the longest shank router bit you have. Chuck it up, cut some holes and feel it with your hand.

If your gut tells you “dang, that’s pretty wobbly” listen to it. And treat yourself to a Big Mac on the way home to ease the pain of walking away (which will be much lesser than wrestling with a bad tool for years).

ETA….

Run out can be caused by stressing the DP when using a cylinder drum sander….. and that won’t be repairable.

My Grizzly has .003 TIR, and though it’s acceptable for all off my woodworking tasks, it still burns me, as I purchased the DP new.

-- Pine is fine, but Oak's no joke!

View Fred Hargis's profile

Fred Hargis

3941 posts in 1957 days


#14 posted 01-08-2015 08:15 PM

I have that DP, and I also had about .01” of runout on a chucked rod and about an inch below the chuck jaws. That really never caused me any problems, but the Chiwanese chuck did start giving me problems. Rather than repair it, I replaced it with an LFA (made in France) chuck and my runout dropped to about .003” (IIRC). I elected to upsize the chuck when i did this…the larger one (3/4”) didn’t really cost much more than a 5/8”, though I did need to get a different arbor. Worked out well. You had mentioned somewhere wanting a larger motor, I think you will be quite surprised at well a 3/4 HP motor does on a DP. Having that 3/4 HP is why I wasn’t worried about upsizing my chuck.

-- Our village hasn't lost it's idiot, he was elected to congress.

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DIYaholic

19178 posts in 2139 days


#15 posted 01-08-2015 08:31 PM

Matt,
He did say that he never actually measured the runout…. youse is smartz!!!
I’ll need to find a straight rod…. No jokes please, this is a family friendly site!!! ;^)
Will a long-ish drill bit work???

Hopefully, I won’t be treating myself to a Big Mac!!! I prefer a Wendy’s burger anyway!!!
Thanks, for the info & insight!

Fred,
I do know that a few things can effect runout….
Mating of the tapers…. is one I can think of… & the chuck itself.

Good to know that 3/4 will probably be all that I need.
Your input is greatly appreciated, thanks!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

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