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Thread: waldown NH3 parts required
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24th July 2014, 09:39 PM #16
I had a go at drilling tiny holes on my Waldown - given the cahllenge
It didn't work well at all
THe first one I tried was 0.1mm.
I got it out of the packet and inserted into the chuck - and found the drill part on the end of the shank missing I obviously broke it off between packet and chuck. Couldn;t see it anywhere. About 20minutes later a rag caught on the side of my index finger. Closer examination found the missing drill bit almost entirely embedded in my finger. Never felt a thing. I pulled it out - still no sensation.....
Next try was a 0.25mm one. It shattered as soon as I touched the aluminium I tried to drill into.... bugger.....
OK so I gave up drilling aluminium with those drills - I wanted to keep the bigger ones in the set for printed circuits and so on.
So I tried a 0.9mm long series drill I have a few of - ordinary GOOD P&N drills.
No problems starting the hole and then going all the way through. THe drill bit flexed a bit and vibrated, but I could steady it by hand to stop that vibration.
Nice clean tiny hole.... and yes, drilled at 24000rpm.
0.25mm drill.jpg IMAG1362.jpg IMAG1363.jpgCheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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25th July 2014, 08:57 AM #17GOLD MEMBER
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25th July 2014, 06:24 PM #18Senior Member
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Small drill bits
"Closer examination found the missing drill bit almost entirely embedded in my finger. Never felt a thing. I pulled it out - still no sensation....."
See Joe, acupuncture is painless.
I suspect that your drilling setup is not rigid enough for those small drill bits. The material will deflect slightly and "ping" its gone.
Roger
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25th July 2014, 08:00 PM #19Senior Member
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How much runout is in that chuck Joe? I think you will need a good keyless chuck if you want to drill small holes. By the way, why do you want to drill 0.1mm holes anyway, I have been "In the trade" for over 40 years and have never needed to drill anything that small.
Lex.
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12th August 2014, 12:14 AM #20
Back from the other side of the globe....
To answer a couple of questions - even though late . No, I don't need to drill holes THAT small, but I intend to drill or resize carby jets with very small holes and ream them. Mostly the other small holes will be in printed circuit boards and 24000rpm is certainly not excessive for very small holes, though I will probably rarely turn up the wick that much as a rule.
The drill chuck in this drill has no runout I can measure at the 1/8" shank size that these little drills have. The 0.9mm long drill I used has no runout either that I could feel or see (not measured). The drill itself is designed for very small holes and exceedingly rigid. However, a look under the microscope showed some of the drills in this (cheap) kit astonishingly poorly sharpened, some with no clearance angle some not symetrical. You get what you pay for....
In any case, I'm very happy with the performance of this drill press.Cheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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21st October 2014, 04:09 PM #21
Just to keep the related information together in one thread.
Today I had a circlip break on the Waldown NH fr unknown reasons.
That required me to pull the spindle out.
So here is a photo of my spindle and downfeed as an exploded view in large scale for detail.
My spindle has two AC bearings back to back and a strong spring providing the preload. Interesting.
The replacement circlip is the little one just near the chuck. The parts are laid out in the order they go together.
It's all back together now and working nicely.
To get it out all that was required was loosening the grub screw which holds the lift spring housing in position, unwinding that carefully until the spindle dropped and then a little more to ensure no tension on the spring. The pulling the sping and housing off the the downfeed spindle.
Next pull the downfeed spindle out of the head casting. The spindle may then fall down - careful. That's it. Chuck off, pull actual spindle for inspection and photo. regrease, reassemble, fit new circlip, refit chuck, reistall. Done.
Spindle.jpgCheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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22nd October 2014, 09:46 AM #22GOLD MEMBER
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