I hear you reg the use of a Belt Linisher and did use one for a number of years but mine gave up the ghost a while back. Need to get another.Yeah, simple part. Judging by the fracture I thought it could be cast or sintered. Not even hardened. Surprised you didn't let a 1" belt sander assist. So handy for these jobs and you can even get good little cheap ones. Dykem, scribe the lines, and lay out the holes with a prick punch. Then carve and drill away everything that doesn't look like the original! CNC or water jet? Are we going into production? Just make it. This ain't aerospace tech. Guys that never made anything overthink it. And what are they thinking anyway?
That's not how investment cast works. Or sintered steel. You get good clean accurate parts. Many, many things are manufactured this way. It's most likely sintered steel. Basically, steel powder gets pressed in a die and then baked. Other metals are done this way too.
It was still an easy Job. I used a decent Flat file and and a 1" width half round.
The OEM part looked odd. One poster here mentions it being a pressing....maybe but it had a grainy look to me.
The real issue I had was with riveting back to stock appearance. I didn't attempt it.
Forgot to mention I used roll pins from an RS roll pin kit, trimmed to length on grinding wheel, chamfered them and reblued. Crosman 1377 style.
Looked neat and should last.
My take might be ...not so much the material but the massive force this component is expected to take.
Do not forget it's not loads of repeat low pressure pumps like a Crosman pistol similar but one great big force with much bigger mechanical advantage making it not seem so great.
It's interesting that the 2 I did had fractured at the same place on the radius where it was slightly less wide and at the max load point give or take.
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