Thanks for the kind message.I think its getting there but i don't always get the same results every time at the moment. but I absolutely love welding now it still amazes me. I want to be confident enough to weld some of the chassis on the car and not need to ask a friend it they might like a ride in it first (Just in-case ). I think because I'm teaching myself there is probably a lot of bad habits going to be there.
I did think if riv-nuts originally but it seems that if any vibration occurs then these would start to wonder about a little. I really love the idea of welding the nuts in. I'm a worrier and I have used the sander to take the zinc coating off but it says somewhere the gasses are pretty bad for you. I'm not sure if there are specific welding quality nuts around or anything ? or just hold my breath and grow a pair.
Last edited by grain_r; 24-09-2015 at 10:43 AM.
Zinc fumes can give you flu like symptoms, which can take 3 weeks to go. It is probably best to wear a good quality respirator and work in a well ventilated area. Zinc inclusion in the weld won't really happen as the zinc will burn off, but for the sake of your health it is better to sand it off, while wearing a mask as the dust is just as poisonous. A lot of heavy metals are cumulative poisons as the body can't get rid of them. Fortunately zinc can be dealt with by the body.
Have fun welding !
Thes might be what you want http://www.ebay.co.uk/itm/like/16144...s=true&ff13=80
Last edited by cropwell; 27-09-2015 at 12:55 PM.
Thank you very much for the explanation and I will certainly wear a mask in future and I'm getting those bolts on order to make me worry less.
Well I thought I would keep my progress on here. Unfortunately It's not quick but going the right way.
I have made the frame sides and tacked the end screw plates on. Everything has been sanded down with a disc sander to give the best possible accuracy and then I have used my trusty Digital Vernier calliper although I have also made the screw holes larger diameter for a little fettling movment of about 1/2 mm Just in case.
The next step is to start drilling my holes for the Threads. I have chosen M5 allen screws and I have ordered a cobalt 4.2mm drill for the threads.
I just need to experiment getting the hole exactly centred for the thread holes to be as accurate as possible.
Last edited by grain_r; 17-12-2015 at 12:49 PM.
One other tip, if you're not doing it already - get the right taps! For through holes in steel, use a spiral-point tap. For blind holes, use a spiral-flute tap. Avoid using conventional hand taps (straight flutes) if you can. They are hard work and you find yourself going in a half-turn, then backing off to release the chips, then every so often bringing it right out to clear the flutes. The spiral-form taps are designed to push the swarf in front or bring it up the flutes, and you can tap in one pass without backing off all the time. They're cheap enough from China (I recently bought a couple each of M4/M5/M6 plus one M8, and the whole lot, including postage, was just over a tenner). Well worth while.
Last edited by Neale; 17-12-2015 at 02:53 PM.
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