need information concerning metric drawing
need information concerning metric drawing
(OP)
My company is currently working on parts from German drawings. The following callout n25 H7 is used several times. I know the 25 is mm I know the H7 is class of fit. what I can't find out is what n means.
thanks
thanks





RE: need information concerning metric drawing
RE: need information concerning metric drawing
In your case: 25H7 = 25mm -0, +21. Quality H7 can be achieved by reaming.That is -0.000mm, + 0.021mm.
My advise: If you are in the machining business - study DIN/ISO 286. Google it! You will need it.
Go here for more info: http://www.wisetool.com/fit.htm
Good luck.