a Steel Box Section Build with SBR20 & Ballscrews Plus a few questions

**JAZZCNC** · 23-09-2015

Hi rob,

Nice to see you back again thou would nicer still to see pics of a welded frame so get the welder fired up and lets see some action. . Lol

Don't worry too much about only being 3mm it still taps and holds threads with smaller bolt sizes. If you need larger bolts in places you can't reach back of then there's other quick and dirty ways like drilling larger hole and inserting a nut weld in place and grind flat.

So now go away and don't come back without pics of a welded frame. .

**grain_r** · 23-09-2015

Hey Jazz

You didn't say the frame had to be a CNC machine

thanks for the advice on the bolts. I like the idea of welding the nuts into the frame and grinding them. you say drill them but with my welding skills as they have been it will just be nice to fill some of those holes that just seem to appear in the metal when the tig torch is close. I have brought 2 boxes of screwfixes finest M5 Allen bolt selection boxes (And not even Christmas).

Thanks

Rob

**JAZZCNC** · 23-09-2015

Originally Posted by grain_r

you say drill them but with my welding skills as they have been it will just be nice to fill some of those holes that just seem to appear in the metal when the tig torch is close.

Tig.!! . . . You shouldn't be blowing holes with Tig.!! . . . It's like welding with chocolate sauce it's so smooth and controllable.!! . . . . Go watch a few more videos on setup. . Lol . . . .. Or try it with your eyes open this time. . .

Edit: Just seen pics and there spot on welds mate well done. Tig isn't easy thing to learn so your doing well. .

**cropwell** · 23-09-2015

Originally Posted by JAZZCNC

Hi rob,
If you need larger bolts in places you can't reach back of then there's other quick and dirty ways like drilling larger hole and inserting a nut weld in place and grind flat.

Or use riv-nuts if you can't be arsed to fart about with welding

**JAZZCNC** · 23-09-2015

Originally Posted by cropwell

Or use riv-nuts if you can't be arsed to fart about with welding

Cum-on I'm a Yorkshire Man have you seen price of them buggers.!! . . . . . Can get 100 nuts for price 10 of them.!!

**grain_r** · 24-09-2015

Hey Jazz

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.

**JAZZCNC** · 27-09-2015

Originally Posted by grain_r

or just hold my breath and grow a pair.

None of the gases given off are exactly good for you so if welding for long time or anything you know isn't sweet smelling then wear a mask.! I wear mask all the time when welding.

**cropwell** · 27-09-2015

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

https://en.wikipedia.org/wiki/Weld_nut