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The Workshop Progress thread 2022

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Pete.10/05/2022 17:40:55
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801 forum posts
241 photos

Nearly finished restoration of my BNL no5 Arbor Press, while taking it apart the hand wheel broke, I tried pulling it off with a 3 leg puller but it snapped, it was spinning around freely on the Arbor but just would not come off, I ended up slitting it with a hacksaw then chain drilling it to remove a section so it would come off the Arbor.

After getting it off the problem became apparent, over time it must have been slipping and repeatedly got spun round causing the Arbor to mushroom out either side of the screw, and wear 2 grooves into the inside of the bore making it mechanically impossible to remove.

So decided to give mig bronze brazing a try as I've never done it, I was hoping this method would remove the need for pre heat and post heat, the repair below was done with no pre or post heat.

It's a bit tricky and definitely doesn't produce nice weld beads like Tig, but after a bit of fettling with the die grinder and a carbide burr, it's hard to notice where it was brazed anyway.

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Edited By Pete. on 10/05/2022 17:44:17

Pete.18/05/2022 21:10:19
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801 forum posts
241 photos

Some more cast iron repairs, I am happy to say the mig brazing process can repair cast iron reliably with no pre or post heat and no cracking, it's not pretty but it is quite easy and hassle free, 10 minutes with the die grinder and job done.

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Hopper18/05/2022 22:25:23
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6393 forum posts
334 photos

Wow that looks like the way to fix cast iron. I never knew you could do that with a MIG. Thanks for the tip.

Buffer19/05/2022 09:31:06
338 forum posts
153 photos

Pete that's a great job, what was the wire you used?

Thanks

Andy Chancer19/05/2022 12:29:46
14 forum posts

Nice job there.
Stainless wire can be used to weld cast also.

Edited By Andy Chancer on 19/05/2022 12:30:20

Jon Lawes19/05/2022 14:52:21
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926 forum posts

Excellent work, thanks for the information.

Mark Rand19/05/2022 20:35:14
1272 forum posts
28 photos

I scrounged a large reel of Inconel 82 when they were having a clearout of the Weld Lab at work. It's wonderful stuff for 'stick anything to anything' welding. I've successfully used it for Cast iron and stainless repairs.

Pete.19/05/2022 22:18:51
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801 forum posts
241 photos
Posted by Buffer on 19/05/2022 09:31:06:

Pete that's a great job, what was the wire you used?

Thanks

Hi, the wire used is SIF no8 bronze mig wire, bought from R-tech welding, it is used with pure Argon gas, and aluminium torch tips with a Teflon liner in the torch.

This is recommended as a bearing surface so could be useful for building up worn areas and then machining.

The liner was about 11 quid on ebay, the wire was 30 something plus post for a 0.8kg reel, not cheap but should get a good few repairs out of it.

I'm not familiar with inconel 82 brazing wire, all I know is it's an extremely expensive material, never seen it for sale anywhere.

Pete.20/05/2022 23:41:20
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801 forum posts
241 photos

Finished for now, a few little bits to do when time allows, replace the hex head screws clamping the support legs with hand knobs for convenience, and need to make crank handle for the table lowering and raising, but it's usable now.

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Baz21/05/2022 08:39:34
724 forum posts
2 photos

Wow! That is an excellent piece of kit you’ve got there Pete.

Jim Nic11/06/2022 21:31:00
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384 forum posts
218 photos

Having completed the Norden engine and cleaned the workshop I was at a bit of a loss looking for an interesting follow up. Scrolling through the Mad Modder site I came upon the very thing, a 3 cylinder radial single acting engine. Originally designed, I believe, by Edgar Westbury as the Cygnet Royal and subsequently simpified by Elmer Verburg. This version is an amalgam of both designers thoughts put together by Stew Hart.

This is Stew's engine and what I am aiming for.

stews original in jpeg.jpg

To kick off I took a piece of aluminium bar:

crankcase 1.jpg

And removed most of the metal from it until I was left with this:

crankcase 2.jpg

crankcase 3.jpg

For scale the flats on the hexagon are 25.4mm wide.

The next opportunity for me to make a mistake is the 3 cylinders and their cast iron liners. Wish me luck.

Jim

 

Edited By Jim Nic on 11/06/2022 21:34:33

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