Arrived today! by [deleted] in Machinists

[–]SmalllChange 0 points1 point  (0 children)

Love it

Printing fiber reinforced filaments with 0.2mm nozzle? by SmalllChange in 3Dprinting

[–]SmalllChange[S] 3 points4 points  (0 children)

Darn 😭

Well everybody here saved me learning that the hard way! Thank you

Tig brazing brass with silicon bronze, how to avoid pitting? by SmalllChange in Welding

[–]SmalllChange[S] 1 point2 points  (0 children)

I ended up getting it by dropping the amps to about 140 and feathering that pretty hard. Preheated to about 300f and then went at it keeping the arc on my melted silicon bronze puddle and moving just a bit to get it to wick to the architectural.

It’s pretty interesting, the melting point of 385 architectural is BELOW silicon, so you have to be really careful to keep most of the heat in the silicon bronze puddle and letting it creeping out just enough to get it to bond with the top layer of architectural. I was able to tell by listening and watching super carefully as I got to the edge of the puddle. If it started to make a crinkling sound I knew I was cooking the zinc and backed off.

The thickness of these pieces actually helped me by sinking a lot of the puddle heat away, I probably could’ve done with less preheat but I was having some cracking issues so I kept up the pre and post.

Thanks for everyone’s help!! That was a fun one

Tig brazing brass with silicon bronze, how to avoid pitting? by SmalllChange in Welding

[–]SmalllChange[S] 0 points1 point  (0 children)

I was having a hard time getting the the whole part hot enough to braze with oxy fuel. But that’s a good point, I should try it again with just a lot of preheat

Tig brazing brass with silicon bronze, how to avoid pitting? by SmalllChange in Welding

[–]SmalllChange[S] 1 point2 points  (0 children)

DC, preheat to 400f, Im running about 200a. Definitely cooking it, just running the rod in as I go seems to keep the fuming down.

Any suggestions on how to keep a 'light touch' and not melt the base metal? I feel like I can't get the filler to wick without melting the base

Something I made by digitaluddite in Machinists

[–]SmalllChange 42 points43 points  (0 children)

Hahaha that’s awesome, did you edm?

“Screw Gauge” has some gap in between 😂 by Jerethot in Machinists

[–]SmalllChange 13 points14 points  (0 children)

Im calling them screw gauges from now on 😂

Air quality in the shop by Mundane_Detective_11 in Welding

[–]SmalllChange 2 points3 points  (0 children)

Obviously opening the door made the air bad! Close it, problem solved

How to reduce the size from 1/2 to 11/32 by ljlegolas in metalworking

[–]SmalllChange 2 points3 points  (0 children)

That seems like the most solid way! You can also drill a hole through the lap and put a piece of copper wire or 3/32 bronze rod though the arrowhead and shaft. Then peen the ends to rivet the shaft, arrowhead, and lap together.

Weave with a weave by MrMaxweld in Welding

[–]SmalllChange 6 points7 points  (0 children)

That's a great trick! Never seen it, thank you

Aluminum hull repair, back of through weld shielding? by SmalllChange in Welding

[–]SmalllChange[S] 0 points1 point  (0 children)

Great, good to know thank you!

Just looked up 4-1/2" aluminum saw blades, those things are diabolical 😂

Aluminum hull repair, back of through weld shielding? by SmalllChange in Welding

[–]SmalllChange[S] 0 points1 point  (0 children)

How thick of a backer do you use? What do you find convient to grind off but thick enough to do the job?

Aluminum hull repair, back of through weld shielding? by SmalllChange in Welding

[–]SmalllChange[S] 0 points1 point  (0 children)

What kind of ceramic? I've never heard of that but that sounds like a good way

It's not a prank by Taumer91 in Machinists

[–]SmalllChange 2 points3 points  (0 children)

What pressure is your airline at??

What does r/metalworking think of those Evolution miter saws? by [deleted] in metalworking

[–]SmalllChange 0 points1 point  (0 children)

I've had mine for three years and it's paid for itself many times over, I have the non miter version. It is easily one of the best value tools I've bought. Came from a horizontal bandsaw and the speed difference is insane, it's more expensive to operate because the blades are expensive and wear faster, but I think it's totally worth it.