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Problems drilling out metal

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Old Apr 8, 2018 | 07:56 PM
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Problems drilling out metal

I'm trying to expand the holes on my cross-members and my tools (or experience) aren't adequate. Before I contact a machine shop, I figured I would ask here.





So I've tried using regular drill bits like those above and the boring type pictured on the drill press.
 
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Old Apr 8, 2018 | 08:15 PM
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probably your press drill is turning to fast. most press drills are to fast can you reduce the speed . enlarging a hole is tough on the drill bits.
 
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Old Apr 8, 2018 | 08:18 PM
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I've tried it with both the press and a cordless. The press is adjustable, so I can increase or decrease the speed. I've tried the recommended (by the manufacturer) and full-speed with the press and slow to high with the cordless.

 
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Old Apr 8, 2018 | 08:25 PM
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do you have a pencil grinder,it would enlarge that in no time.
 
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Old Apr 8, 2018 | 08:27 PM
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I don't - let me google that. So would any grinding bit work?

Can I use one of those grinding bits with my Dewalt or do you suggest just getting a pencil grinder?
 
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Old Apr 8, 2018 | 08:28 PM
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There really should be no reason for that to drill hard . A good bit in the press at slow speed with a little oil and not too much pressure .
 
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Old Apr 8, 2018 | 08:29 PM
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I can retry that as I assumed the same thing. The bit in the Dewalt had no problem drilling through my chassis. I'm assuming the nut welded inside the cross-member is grade 8 (or better if there's such as thing...)
 
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Old Apr 8, 2018 | 08:34 PM
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if the shoulders of your bit are broken,you will need to sharpen them
 
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Old Apr 8, 2018 | 08:38 PM
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I meant to say the type of bit - that bit was never used until now. I got a large set of that type of bit from Costco about a year ago. It came with 8+ of each size until you get to the larger ones
 
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Old Apr 8, 2018 | 08:51 PM
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The standard bit you show in the picture duller than a rock. Sharpen the bit or buy a good quality bit and that should fix your problem.
 
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Old Apr 8, 2018 | 08:52 PM
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we have a small shop,and a few years ago a guy ask to borrow a hand drill. i was working and noticed he was having problems. i walk up to him and notice the hand drill was in reverse. he was at it for almost 15 minutes. not saying its your problem, it just reminded me of this,
 
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Old Apr 8, 2018 | 08:56 PM
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That appears to be a 48-52 center crossmember? I can't think why there would be a nut inside it?
 
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Old Apr 8, 2018 | 09:13 PM
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I hope it's not a 48-52...though it could explain why it was a few millimeters off on each side...(my truck is a '54)

I had tried with the drill press and it only goes in one direction. That said, the Dewalt does have a nice switch so you can see what direction it's going (I will double check that I didn't make a mistake though).

I can try with a new bit - I don't think I have the tools to sharpen a bit.
 
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Old Apr 8, 2018 | 09:16 PM
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It looks like this:

1953-56 Ford F-100 Hidden Bed Crossmember Kit
 
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Old Apr 8, 2018 | 10:05 PM
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OK, I understand.
 
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