André Muchalak Posted July 28, 2018 Share Posted July 28, 2018 Hello everyone! My name is Andre, I’m naturally from Brazil. I am finishing my kynion style pneumatic hammer but I’m having a low bpm problem and I don’t know what is the main cause, since I have a 250L compressor running with 15bar.. this is the compressor. My piston is kinda big, but I don’t think that it would be a problem to this compressor... it has 115mm on its base, and the arm diameter is 45mm ( don’t know if this is the right word) Ive based myself on crickets air circuit plans, but with only one roller valve ( maybe this is the problem) (This is not the pilot valve I’m using, it’s just to use as example) All of the main connections and the pilot valve are 1/2”, only the roller valve and it’s connections are 1/4”. Here is the video of the hammer running... I’m hopping that someone will be able to help me! Thank you!! EA206319-0C77-4302-88C0-722A26E5780E.MOV Quote Link to comment Share on other sites More sharing options...
Jspool Posted July 30, 2018 Share Posted July 30, 2018 Well I'm no expert and while I can hear your .mov files, the visual is not coming through for me. On my Kinyon bpm is adjusted by the placement of the roller valves. Did you try lowering the top roller? Is the hammer hitting hard? Hopefully someone with a lot more knowledge will chime in. Quote Link to comment Share on other sites More sharing options...
Latticino Posted July 30, 2018 Share Posted July 30, 2018 Not up on Kinyon hammers either, but to help diagnose for those in the know I suggest you give info on your compressor that is not just the storage size and maximum pressure, but the pressure rating at a certain airflow (i.e. 95 PSI at 11 SCFM). That being said, your tank size seems adequate and the maximum pressure is in line, however, big hard hitting air hammers are real air pigs. The Big Blue 110 hammer in our groups shop needed a compressor that cost almost as much as the hammer... Quote Link to comment Share on other sites More sharing options...
André Muchalak Posted July 30, 2018 Author Share Posted July 30, 2018 Well, thats odd, here the video seems to be ok.. I’ll try with another vid. 36 minutes ago, Latticino said: Not up on Kinyon hammers either, but to help diagnose for those in the know I suggest you give info on your compressor that is not just the storage size and maximum pressure, but the pressure rating at a certain airflow (i.e. 95 PSI at 11 SCFM). That being said, your tank size seems adequate and the maximum pressure is in line, however, big hard hitting air hammers are real air pigs. The Big Blue 110 hammer in our groups shop needed a compressor that cost almost as much as the hammer... I’ll check that 0C8C2EB2-F00C-4850-B5AE-0C7996EA9708.MOV Quote Link to comment Share on other sites More sharing options...
Hans Richter Posted July 30, 2018 Share Posted July 30, 2018 Hi Andre, my Kinon style hammer with a 50mm piston and an average stroke of 160mm use 8 bar/ltr of air for every in/out stroke. That forces me to have an air bank of 5000 bar/ltr (500 ltr tanks on 10bar) and 3 cylinder 5HP compressors. With a working pressure at 6.5bar and at least 90 stroke per minute I can forge 3 minutes before the compressors have to interfere (at 6.5bar) again. Fortunately, after 3 minutes’ work at the hammer I have to heat up the work piece again. Also, very important to use a proportional air outlet to ‘play’ with the escaping air an be on control of strength and beat rhythm. Quote Link to comment Share on other sites More sharing options...
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