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Old 23rd February 2005, 10:14 PM   #1
beedlo is offline beedlo  Canada
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Default Cordless Drill Guns for tapping

I am quite intrigued after reading Peter Daniel's posts on tapping with a cordless drill gun with a clutch.

http://www.diyaudio.com/forums/showt...9413#post69413
http://www.diyaudio.com/forums/showt...580#post363580

So much that I am already thinking of investing on a cordless drill gun (I don't have one!).

My question is: How can I pick a cordless drill gun that is suitable for tapping (among other things)? Is maximum torque a concern here?
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Old 23rd February 2005, 10:44 PM   #2
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I would consider makita. As a service man who has to rely on sturdy well funtioning equipment nothing beats those.
You need one that is good for driving screws, as those have lots of torque at low speeds.
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Old 23rd February 2005, 10:49 PM   #3
jcayer is offline jcayer  Canada
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Default Re: Cordless Drill Guns for tapping

Quote:
Originally posted by beedlo
I am quite intrigued after reading Peter Daniel's posts on tapping with a cordless drill gun with a clutch.
...
My question is: How can I pick a cordless drill gun that is suitable for tapping (among other things)? Is maximum torque a concern here?

Beedlo,

I guess you could begin with Home Depot and the likes.

I do it at the shop without any problems. Just chose a model that you can adjust the tork. Like Peter mentionned, I also use a Bosch model that has 24 levels of adjustments. The trick is to go slowly, so slow speed is an important feature. You go 2 or 3 turns and then back 1 turn and so on.

I only tap in aluminum so I don't know for other metals...

My .02$ (Canadian)
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Old 23rd February 2005, 10:52 PM   #4
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No... anything that needs a lot of torque you wouldn't be able to hold on to anyway, al least until you broke the tap.

Get a drill with two speeds. Drill on high and tap on the low range. Learn how to hold the drill straight so you can use a two flute tap... four flute taps (hand taps) are p00h ~ too weak because of the flutes and the flutes are too small for chips.

Torque limiting is kind of nice but ostensibly the torque is limited by the chuck's grip on the tap. I tapped about forty holes on a machine yesterday 1/4-20, 4, 5 and 6mm. Never used the tap handle once.

Tap breakage si a real pain. To avoid breaking taps, use a decent lubricant. For aluminum and steel a good product is Trim "Edge". It comes in a tooth paste tube. For plastics, use a houshold cleaner like Fantastik or Windex. If the workpiece is very critical (tapping is often the last operation!) move to a tap drill size that produces 65% thread as oposed to the standard 70%+. Fine threads are much easier to tap than coarse threads.
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Old 23rd February 2005, 10:53 PM   #5
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... and my last couple cordless drills have been Sears Craftsman. Good drill for the money and when they are on sale, nothing touches them on value. Get TWO speeds.
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Old 23rd February 2005, 11:04 PM   #6
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Quote:
Sears Craftsman
value for the money??
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Old 23rd February 2005, 11:09 PM   #7
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Any variable speed drill will work. I have used lots of different ones. Tap lubricant .... best I have used is bacon grease. Sure you can find expensive ones and they will work. About anything will do. Keep it straight and keep it moving. Backing up is ok for a hand tap operation. I don't back up unless it stalls. I have done thousands of holes in aluminum without breaking a tap and steel is easier yet.
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Old 23rd February 2005, 11:24 PM   #8
jcayer is offline jcayer  Canada
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Quote:
Originally posted by burnedfingers
... Tap lubricant .... best I have used is bacon grease.

And you ask why it smell bacon when you listen to music ?

I never heard about this one but I'll shure give it a try
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Old 23rd February 2005, 11:41 PM   #9
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bacon grease? I use for threading generally "ridgid" threading oil.
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Old 23rd February 2005, 11:45 PM   #10
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Makita is strong and very durable, Bosh is more delicate but fits nicely in a hand. DeWalt is practically undestructable, but very unhandy (perfect choice for heavy construction work).

For tapping, there are no special requirements, and most anything will work. Go for good price and nice fit.
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