And a very important feature of a good TIG machine for welding small parts is it's ability to go down to at least 5 amps, lower is better. Some inexpensive machines will not go low enough. Foot petals have been around since the '40s when TIG was developed, first registered as Heliarc by Airco...
Not true today with inverter technology. I have a Thermalarc 190 GTS, bought 12 years ago that delivers 95 amps on 110v, and 190 amps on 220v. Gunsmith welding rarely requires more than 50 welding amps if ever, easily provided by a std. 110 outlet.
CAW
It isn't .210" down to the sear, it is .210 down to the thumb safety hole. Down to the sear pin hole is, .252" +.016", that makes the difference. So, .371" X .268" gives a hypotenuse of........... .457673", not .4344
CAW
Increased? The prints when read as they are, show it should be .458", or to take it to the fourth place, .4576, seems to be pretty much as it should be.
CAW
No, a common misunderstanding. The sear primary should always be cut as per the drawing, the primary face must be 90 degrees to a line from the sear pivot hole to the sear tip. What this means is the area where the hammer hook tips land is higher than the escape edge. This allows for a...
Whose say 89 degrees? The prints available say 86 degrees.
What's important isn't really the floor to hook face angle, but the hook face relation to the pivot hole. The position desired by the original design puts the hook face if extended toward the pivot center above the hole perimeter by...
Faulty print reading. The nominal would be .458", .371"X .268", the .268 comes from the correct reading of the sear to hammer of .252"+.016"=.268". The .210 is the thumb safety hole.
CAW
The tension may be fine, but the extractor from what you have said, is losing control, and allowing the case to go too high for the ejector to contact, and eject. It may benefit from more tension.
CAW
The breech block on the left, opposite the extractor, is the tension wall for the extractor to hold the case rim against. Have you also checked for correct tension? There should be enough tension to hold a loaded cartridge with it inserted in the slide only. Gentle shaking should not cause it to...
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