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Help buying a cordless drill

Posted on 2012-03-25
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Last Modified: 2012-06-27
Hi,

I hope that someone is able to help. I have been working on my car over the weekend and I have been trying to get off a screw that holds in one of my brake discs.
The bad news is that the head got chewed up and I need to drill it out.

I don't know anything about cordless drills but was having a look at the following:

http://www.my-tool-shed.co.uk/p14097/Einhell_BT-CD24i_24_Volt_Hammer_Drill_with_2_x_Batteries/product_info.html

I assume that you can turn off the hammer action on the drill?

I was going to use a centre drill bit and possibly tap bit if required. Just been doing some reading and watching a few YouTube videos to find out what to do.

Regards,

Ross
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Question by:ross13
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Assisted Solution

by:John Hurst
John Hurst earned 166 total points
ID: 37763701
Unless you need a hammer drill for other projects involving concrete, you do not really need a hammer drill.

You will want a variable speed drill and some really good drill bits for metal. One way to do this is to gently center punch in the center of the bolt so that you can use a small size drill bit that will not jump out of the bolt. Then work up in size for a small screw extractor (the reverse of a tap).

So you need a good center punch, a hammer, good drill bits for metal, small screw extractors, and a good variable speed drill.  Work carefully. The most important thing here is a good center punch so as to hold the drill bit and prevent skipping.

Be careful of damage to the disk (removing metal) as this will ruin its balance at speed.

.... Thinkpads_User
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Assisted Solution

by:Michael-Best
Michael-Best earned 334 total points
ID: 37764117
Do not drill it before trying to loosen it with an impact driver/wrench first.

 An impact driver/wrench is a tool that delivers a strong, sudden rotational and downward force.
 In conjunction with toughened screwdriver bits :

http://www.kk.org/cooltools/archives/000723.php

Hpe ths hlps.
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Michael-Best earned 334 total points
ID: 37764144
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Author Comment

by:ross13
ID: 37779558
Thanks for the help. I am going to try this weekend and will update this post with how I get on.

Cheers,

Ross
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Author Comment

by:ross13
ID: 37803215
I ordered an impact driver and gave this a try with out any luck. I tried to heat the screw up as well and tried it but it would not move. I tried the screw extracter that i ordered but no luck. I was going to try and drill the screw out but the battery run out on the drill. It was a cheap drill i bought so i cant expect much.

Thanks for the help.

Regards,

Ross
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