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Guys I Need Some Advice - Drilling


Edge

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Guys I have been having some problems and am now seeking your advice. What do you use to drill your lugs. I have a dremel multipro and the drill bits recommended to me by Dave (Thanks Dave).

However now to the problem, I keep fu**ing breaking drill bits. Get nowhere into the drilling and I break the bit clean off. I mean we are talking seconds, what the hell am I doing wrong??

ALL SUGGESTIONS WELCOME, including that I am just incompetant lol.

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Hey Edge

The problem is that the case its made out of a hardened steal so you will need to do the hole

With a low speed drill not with dremel, you can use a regular bench tyoe drill with a HSS drill bit

But use the drill at slow speed, dremel will not do this cuz is to fast even at low speed and

Has no enough power.

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Chris, I used a dremel and cobalt bits. I held the watch firm but free hand and allowed the bit to follow the case holes. I did not have the bits break using this technique. BTW, these bits get dull so I suggest installing a new for every 2 holes.

What I did that I haven't seen mentioned, is use a smaller size bit to get things started and the 1.2mm to finsih. You need to lubricate the holes & bit often to keep things from getting too hot.

I agree with the comment that a low speed drill with torque would be much better than a dremel. The high speed of the dremel generates excessive heat & places a heck of a lot of stress on the bits.

Jet

Edited by Jetsons
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Snap-On has some bits that run a couple dollars per bit. Not sure if you have access to these- I can order some (I've been meaning to anyways), and I can ship you some, if you like?

Also... You may want to try using some cooling oil in the lug hole while you drill.

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The bits really aren't the problem I don't think. But getting some bits from you would be fantastic.

I am having trouble even getting it started with the Dremel it only goes as low as 10000 rpm and I think it's just too fast.

I tried the smaller bit first technique that had been mentioned to me befor by yourself and a couple of others, but it just snapped clean off.

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Guest avitt

Sorry I came in late on this. Like others have said, you need a lower speed drill. I recommend just going to your local hardware or department store, and picking up an inexpensive corded or cordless drill (you'll definitely find other uses for it). Even the cheap ones have keyless chucks, and variable speeds. I think that mine is 0-600rpm, and I use about half of the speed to drill the lugs.

I recommend that you lightly clamp the case in a vise (with padding on the jaws). It is dangerous to hold an item by hand while drilling it with a power drill (if the bit catches in the hole, the part could fly around pretty violently).

Probably the best advice is to use a drop of oil on each hole. I use 3-in-1 oil. If you have a good quality bit, and you use these techniques, you should have no problems, and no dull or broken bits.

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Definately too fast if you are using the Dremel. An ordinary drill will do a lot beter with a bit of oil to cool the bit. Start the drill spinning first BEFORE you enter the hole (if you know what I mean!!!!). You are only widening the original holes a small amount so this is important.

I know as I broke mine on the first attempt but managed to resharpen the drill bit!!!!!!! :bangin:

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Make up an extension cord with a dimmer swith in it (dial dimmer works best for me). Plug Dremel into extension and now you have variable speed Dremel. Parts will cost you about $8.00 at a local hardware store. Plus it makes the dremel (or any other power tool )great for low speed work ,sometimes for careful buffing of cases or bracelots.

JKTOWN

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Great info here, folks! Thanks!

I am going to try drilling some CG levers in order to slightly enlarge their hole (to put a gasket in and fix the loose lever problems), and this thread comes very handy!

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Guys I have been having some problems and am now seeking your advice. What do you use to drill your lugs. I have a dremel multipro and the drill bits recommended to me by Dave (Thanks Dave).

However now to the problem, I keep fu**ing breaking drill bits. Get nowhere into the drilling and I break the bit clean off. I mean we are talking seconds, what the hell am I doing wrong??

ALL SUGGESTIONS WELCOME, including that I am just incompetant lol.

A really big hammer dril, 12mm and larger will do the job :bicycle:

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Are you drilling from the inside of the lug or the outside?

If you're drilling form the outside you'll need to use a center punch to keep the bit straight. If your going from the inside, you need to hold the piece REALLY STILL best to use a small vice and a pillar press for your dremel.. Proxxon do a good one.

68647-33220.jpg

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316- 440 Stainless Steel....1.2mm Drill bit, use a HSS bit @200rpm and use cutting fluid...not oil!

compliments of the Machinist Handbook 28th Edition.

UB- I think the 1.3mm would work a little better? The genuine springbar ends measure at 1.2mm, and you'll want a little wiggle room to allow the ends to fully extend...

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Guest avitt

Wow, lots of advice here...some of it conflicting: cobalt vs. HSS vs. carbide, high speed/low torque vs. low speed/high torque, oil vs. cutting fluid...

Just wanted to back up my recommendations with some results:

68773-33185.jpg

68773-33186.jpg

68773-33187.jpg

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ALL SUGGESTIONS WELCOME

You try to decrease the speed and to constantly cool the point.

You for instance use fat derived by the silicone (I hope that it's written so in English)

to prepare the part to perforate.

During thew work you directly sprinkles oil spray on the point that turns.

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