Buying cheapo drill

[steve-o]

sht-- cant delete post .. posting while intox again .. |O

[steve-o]

Yep Makita/ Dewalt is expensive and good , drill presses are exactly what the O.P. needed advice about ; a cheap-o drill .. Let's post a cnc machine next, shall we?

[kitatit]

Hi Borg,
Tapping M4 10mm deep with a power drill is doable but is possibly pushing your luck maybe. With the weight of the drill and depth of the hole it is quiet likely you may snap a tap off in a hole. Don't rush, there will be tears if this happens and the chance of removing a broken tap from your projector base are zero. If you need a cheap new drill, Ryobi are not bad for the money. Use this to drill the holes but I would use a tap wrench to tap the holes. This type in the link below are very good and will make manual tapping much less tedious.
http://www.drapertoolbox.co.uk/drape...der-3832-66291

The ideal tapping drill for M4 is 3.3mm. I would buy one.
http://www.engineersedge.com/manufac...rill-chart.htm (metric course)

If you don't want to, I would use a 3.5 mm drill for this job. It will still give you a good thread but will mean the tap doesn't have to remove more metal, than it was designed for which will increase your chances of snapping a tap.

The method taggaluuci described using a cordless drill works well, I use this method on shallow holes where it become less critical to be square, but I have tapped some terribly out of square holes and snapped taps in deeper holes.

Also the batteries in any cordless drill will stop holding their charge if you don't use them often, especially cheap ones.

Good luck.
Kit

[LaNeK779]

don't forget to use the correct type of taps.

there are the hand taps or gun taps, the spiral point taps and the spiral flute taps. do a little research to see what each do.
i am falling in love with the spiral flute taps. no forward and reverse motion with these

[Anthony]

Yep Makita/ Dewalt is expensive and good , drill presses are exactly what the O.P. needed advice about ; a cheap-o drill .. Let's post a cnc machine next, shall we?

Did you read my reply or are you just intoxicated and on a war?
Come on steve... i hope you mean better than your reply imply's.

He does not want a drill press.
And i did point him towards a cheap housebrand alternative.
Cheap is a relative thing.... i mean.. wat is cheap?
150 dollars for a makita or 200 for a Dewalt. those are cheap of you see what you get for it.. (those brands also sell 500 dollar models)

50 dollars for a housebrand 12V powered is supercheap but such a drill wouldn't last lang with more heavy use.
If it breakes you wil have to buy another one making is less cheap.

I personally really think he is better of with an entry level drillpress.
Herman buitelaar HBM sell them really cheap in our country.

[borgqueenx]

such a wrench tap is used to tap using the strenght of your hand? isnt that hard? i mean its steel your drilling in with a tap even if it removes just a tiny bit.

[Anthony]

yes its is "powered" by your hand.
Normaly you use tapping oil for lubrication.
You do know that you first dril a hole and AFTER that you "tread" tap the hole...?

I your first post you speak about 1cm allu.
In this last post you are talkin about STEEL..
Steel is alot harder to drill and a little bit more tuff to tap.

The most important thing is to use scharp drils and taps, the correct speed and use some form of lubrication.

[borgqueenx]

oh sorry i thougt steel was a category, wich aluminium is one of them.

its aluminium i have. i know that i first drill the hole. but then i still think it would require alot of strenght to tap it with the strenght of my hand.

[JohnYayas]

It doesn't take strength to tap. It's relatively esay. In fact, you have to be careful not to force it or you will break the tap. Especially with the small taps

[LaNeK779]

the difficult bit is to drill and tap exactly vertically. even the best and most experienced can be easily set a couple of degrees off.

anyway, if tapping a baseplate is all you need, then buy the cheapest you can find. just make sure it has adjustable speed and forward - reverse