youngdylan

Hi All I'm starting to play around with a pneumatic impulse generator (monostable???) to get a repeatable single blow from my Kinyon and KA75ish hammers. Basically it gives a presettable air pulse from milliseconds to seconds in length. I use a 3 way tap to swith it into the pilot circuit. It's in series with a second pilot valve that only triggers when the treadle is fully depressed (therefore throttle fully open). It means I stomp on the treadle, the pilot gives a controllable length air pulse and tup will return to top after the blow even with foot still on treadle. Whilst it would be useful to have a blow proportional to the strength of hitting the treadle, it's also useful when doing "stamped" designs to have a constant repeatable strength blow that doesn't rely on trying to control the hit to the treadle. Still experimenting but looking promising. Thoughts anyone? Grant?

Scale bad but my bigger enemy is grinding dust. Workshop is microscopic and I've got a bee in my bonnet about grinding welds smooth. The photos show two kinyons I've built. One is more or less conventional. T'other is KA75ish, but with a pilot valve so it auto cycles. Some of the good things about it, besides the footprint, are the upside down cylinders make for a more balanced air system, which I kinda find much more controllable than the normal Kinyon. The other good thing is the guides. These use easily replacable off the shelf phosphor bronze bushes running against EN24T rods and greased using nipples. The guides have oil seals top and bottom which hopefully keep the grease in and wipe away any grunge before it can get to the bushes..... that's the theory anyway. I like it so much I keep mulling over the idea of modifying the other Kinyon so the "head" is based around two upside down cylinders, side by side with tup (no off center forces like a Phoenix) and a similar "sealed" and easily maintained guide system. Might happen one day. My other hammer is a 40kg Anyang bought from John N. It rocks. Puts my Kinyons to shame; power wise.

Oh yeah and all, if you like Manchester you'll fall in love with Sheffield

Sure is, apart from the rain .... and Stockport. No Industrial museum there, just a hat museum. As Betjamen almost said "come friendly bombs ..."

not sure how much it costs in bulk but how about wire wool instead swarf?

you Americans and your quaint use of language. Is "outlaw style" the same as arrogant?