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What steel do CC use in the chassis

Yahoo Message Number: 92446
I have had a couple of ooccassions to drill into my chassis, once to resolve the over the door awning which was missing a fixing. I assumed I had a blunt drill and thought no more about it. Yesterday after removing my lpg tank for painting and sorting the locker as shown here.
http://damonrapozo.com/news_from_damon.php?article=000026 I needed to drill some extra holes for mounting the regulator support bracket. I could not believe the grief, I used standard drill bits for metal and they did not seem to blunt but cutting the steel was hard work.

Any one have this experience and have any advice?

Michael

2008 Allure 31683

Re: What steel do CC use in the chassis

Reply #1 –
Yahoo Message Number: 92448
I use HSS drill bits (hi speed steel), next start with a 1/4 drill then go up 1/8 at a time till you get where you want to be. Also, a lot of cordless drills do not have the umph needed for steel. A corded drill may work better for you.

Mikee

Re: What steel do CC use in the chassis

Reply #2 –
Yahoo Message Number: 92449
I believe CC used high strength / high carbon steel for a better strength to weight ratio I use a cobalt drill bit which is used for stainless steel. They are available at most hardware stores Bob 06 intrigue. 12047

Re: What steel do CC use in the chassis

Reply #3 –
Yahoo Message Number: 92453
Michael

Very hard to drill. Get good quality drill bits start small and work up in size. Buy extra bits in the smaller size as you will break some unless you are very patient.
Dan 2006 Allure 31348 C-9

Re: What steel do CC use in the chassis

Reply #4 –
Yahoo Message Number: 92459
I had the same problem drilling into my chassis. Having worked on aircraft with exotic alloys, I learned that a flatter angle on the cutting edge solved the problem. A tool supplier that sharpens saw blades will know someone that can sharpen your good bits so they don't wear out so fast. Also slow speed with some liquid (cutting oil works well) to keep the bit cool helps.
John & Judy 2000 allure (currently at CC service in J.C.) 30505