Post by Richard on Feb 5, 2016 20:23:50 GMT -5
Talking about the booster falling thru the bushing/vent?
I just received a .035" bushing from Hank today. I had a question as to the length of the bushing as Rambler indicated he thought it was 1/4" vs. most which are 3/8". Well Hank's are 1/4 x 1/4. The next item was, are the threads deep enough for the keeper screw to contact the 1/4" bushing?........Yes it is.
So now for getting the bushing out (I have done this a number of times but for those have not) to put the new one in. Let me tell you, after 1,150 shots that bushing practically becomes part of the plug. So here is the procedure: First, of course, remove that keeper screw then drill out the flame channel to its maximum diameter..........in the case of my Arrowhead BP, its 5/32". Next get a good quality punch that just fits that hole; it should b e flat on the bottom. Set it on a good solid steel surface...........the back of my 6" bench vise is what I use. If you can, have someone else hold the plug with some channel locks or vise grips to keep it square to the surface. Now carefully hit the punch, trying not to get glancing blows but direct hits.................In all probability, the bushing will NOT come out. Next step, light up your benz-o-matic torch and heat the area where the bushing is located and go back to pounding..............If it still does not come out, re heat a bit longer.............that is when my bushing finally came out. I then chased the threads with a 5/6 x 18 tap (did not have to go in deeper, just cleaned them up. Drop in the new bushing and put your screw back in ..............done!
Kyle_________________as to the booster coming out the vent? I wanted to see how much Clays the BP now held since the bushing is recessed 1/8" deeper so I filled it and weighted it.................2 gr. Next I put some Clays in and held the plug over some white paper and took a screw driver and repeatedly taped on the side of the plug to try to get the Clays to come thru?
?? NG...............Nothing..............Nada!
Tuesday I will see how the .035 bushing responds to single powder loads with some mag. primers.
I just received a .035" bushing from Hank today. I had a question as to the length of the bushing as Rambler indicated he thought it was 1/4" vs. most which are 3/8". Well Hank's are 1/4 x 1/4. The next item was, are the threads deep enough for the keeper screw to contact the 1/4" bushing?........Yes it is.
So now for getting the bushing out (I have done this a number of times but for those have not) to put the new one in. Let me tell you, after 1,150 shots that bushing practically becomes part of the plug. So here is the procedure: First, of course, remove that keeper screw then drill out the flame channel to its maximum diameter..........in the case of my Arrowhead BP, its 5/32". Next get a good quality punch that just fits that hole; it should b e flat on the bottom. Set it on a good solid steel surface...........the back of my 6" bench vise is what I use. If you can, have someone else hold the plug with some channel locks or vise grips to keep it square to the surface. Now carefully hit the punch, trying not to get glancing blows but direct hits.................In all probability, the bushing will NOT come out. Next step, light up your benz-o-matic torch and heat the area where the bushing is located and go back to pounding..............If it still does not come out, re heat a bit longer.............that is when my bushing finally came out. I then chased the threads with a 5/6 x 18 tap (did not have to go in deeper, just cleaned them up. Drop in the new bushing and put your screw back in ..............done!
Kyle_________________as to the booster coming out the vent? I wanted to see how much Clays the BP now held since the bushing is recessed 1/8" deeper so I filled it and weighted it.................2 gr. Next I put some Clays in and held the plug over some white paper and took a screw driver and repeatedly taped on the side of the plug to try to get the Clays to come thru?
?? NG...............Nothing..............Nada!Tuesday I will see how the .035 bushing responds to single powder loads with some mag. primers.
