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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 have 115mm on its base, and the arm diameter is 45mm ( don’t know if this is the right word). The length of the closed piston is 85cm and opened is 145cm. to create the air circuit I’ve based myself on crickets air hammer plans, but I’ve dove with only one roller valve and I’m starting to think that this might be the problem This picture shows the basic scheme that I’ve used, but I’ve removed the venting valve.. the pilot valve is not the one in the picture, I’m using a 1/2” 5/2 spring pilot valve. All the main connections are 1/2”, only the roller valve and its connections are 1/4” And finally, this is the video of the air hammer running... I think you might be able to see the air circuit and tell if the problem is in it... Just remembering that this air hammer was made entirely from scraps... that’s why it’s a little bit ugly, hahahaha. CF2992AA-F93C-4BDA-ACF9-2BE65A5F32CF.MOV 57BC66BC-7A67-48D2-BF5A-E84FFDDC8FB6.MOV