Broken knee gib

[DAM 79]

I would just build it up with bronze

 

[MyLilMule]

I would think any ferrous metal would be fine. If it were mine, I would use Blue Demon TIG brazing wire or EZ Weld TIG wire.

 

[Investigator]

I was able to some silicon bronze TIG rods. I put the gib in the oven and got it up to 350*F and let it sit for a bit. Took it out and quickly got it positioned. This isn't the best brazing I've ever seen, it's not the best I've done either. But, I think it will be fine.






Right after brazing I put it back in the oven to cool slowly. Hopefully I'll clean it up tomorrow and get the knee put back on.

 

[ddickey]

Make sure you check that it is flat too.

 

[Investigator]

Clean and notch cut. Ready to reassemble the knee.

 

[MyLilMule]

Did you check to make sure it did not warp? Do you have a granite surface plate and some feeler gauges?

 

[Investigator]

Did you check to make sure it did not warp? Do you have a granite surface plate and some feeler gauges?

I do not have a surface plate. Best I could do was a flat piece of steel and my eyes looking down it.

 

[ddickey]

You have a lathe don't you? Use the the flat way to check. Or you could use your mill table.

 

[Investigator]

You have a lathe don't you? Use the the flat way to check. Or you could use your mill table.

I do have both. Thanks, learned something new!

 

[Turnaround]

I bought a new gib from H and W, and its listed as .030" over sized (to allow for scrape fitting). As you know, there aren't parallel sides. I tried two part epoxy to a 1/2" flat bar, and it pulled apart as soon as the cutter touched the work. Has anyone come up with a way to hold the gib so that you take a rough cut on a machine rather than hand scrapping my needed .035?"