Help Reading A Drawing

[RJSakowski]

shown below. means depth. I have never used it in my drafting classes. I had to search Google to find it. Not sure what the designer is having you do. You are drilling and taping then re-drilling the same hole. A three place decimal could be a reamed on size hole as well. There should have been a front view of the drawing showing the holes for clarity.

The Best with your project.

It is a confusing drawing! tbell is right; it is a clearance hole for M6.

That said, there is no drill spec for the tapped holes. The convention that I normally would use is as shown below. Drill .0983 hole to .300 depth, tap M3 x .5 to .2400 depth. If I wanted to provide for clearance hole above, say for a shoulder bolt, it would be on a third line expressed as a counterbore ( l_l , my attempt at the c/bore symbol) giving diameter [ c/bore symbol] c/bore depth. A final note: the drill depth is to the shoulder of the drill, not the point.

 

[kd4gij]

The op hasn't been back yet. But he didn't show the whole drawing. So there is probly somethings we haven't seen.

 

[T.B.C.801]

Looking for anyone who has machined Hymark snowmobile heads. I plotted it with a dial but if anyone has the actual dimensions, I would be eternally grateful. They are off an RMK 700. Thanks in advance.

 

[Pontiac Freak]

Thanks everybody for your help! The drawings are some that I found on the internet for a ball turner and they seem to be missing some crucial info in some areas for a beginner. I did have to do some adjustments as .5oo on all the holes would have left hardly any threads on the 2 outer holes. That is why I was confused, seems it should have read a different depth for the middle hole than the 2 outer ones.