Nice job young man! I have a question, when you set up the drilling of the tap size hole did you off set the hole by a couple of thou so as to make the insert pull tight into the sides for rigidity? You may have done so, but it was not obvious. If not check out Robin Renzetti's video about making some boring bars ( Robrenz is his channel name)
Excellent point, having produced countless similar tools at a major tool manufacturer the offset is approx. 0.1mm to the corner so that when tightening the screw the key turns an additional 90 degrees after first contact.
Tengo un comentario en base a mi experiencia como tornero de más de 30 años. Siempre me ha gustado innovar. Y diseñar barras era mi hobbie. En ese tiempo observé que el aisi 4140, O 4340 es demasiado tenso. Tanto que no es necesario templarlo para que cumpla con un trabajo rudo. Pero por su dureza no es tan óptimo como el 1045 que es, digámoslo así, más poroso y menos tenso. observé que absorbe mejor las vibraciones aunque se temple....a esta barra que hiciste, si le haces tres ranuras de diferente profundida (de profundidad mayor cerca a menor lejos) no te vibrará nada aunque la fijes larga..
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Very nice, I enjoyed watching it being made.
I am impressed! good Job. I think i have the same mini Lathe as you do, Wemas?
sorry I don't understand about that. i just bought it secondhand maybe made in china
Well done, it is a good tool.
Nice job young man! I have a question, when you set up the drilling of the tap size hole did you off set the hole by a couple of thou so as to make the insert pull tight into the sides for rigidity? You may have done so, but it was not obvious. If not check out Robin Renzetti's video about making some boring bars ( Robrenz is his channel name)
I used the pointed end of the tap and placed it over the insert hole and dragged it to the corner. then make sure it is tight by hand
Excellent point, having produced countless similar tools at a major tool manufacturer the offset is approx. 0.1mm to the corner so that when tightening the screw the key turns an additional 90 degrees after first contact.
Good work
Nice piece of work that!
Very nice!
Thanks, sir
Tengo un comentario en base a mi experiencia como tornero de más de 30 años. Siempre me ha gustado innovar. Y diseñar barras era mi hobbie. En ese tiempo observé que el aisi 4140, O 4340 es demasiado tenso. Tanto que no es necesario templarlo para que cumpla con un trabajo rudo. Pero por su dureza no es tan óptimo como el 1045 que es, digámoslo así, más poroso y menos tenso. observé que absorbe mejor las vibraciones aunque se temple....a esta barra que hiciste, si le haces tres ranuras de diferente profundida (de profundidad mayor cerca a menor lejos) no te vibrará nada aunque la fijes larga..
Well done!!!!
Thanks, sir
Ukuran thread berapa itu min?
M2.5
What an arse about face way of making a boring bar ?