Info needed for installing/setting up pm940m

[tim81]

Where can I get these metric sae drill bits with odd numbers. Can I undersize normal bits?

 

[verbotenwhisky]

Yes eventually I will get them. The issue the tap say 7.9mm and I don’t seem to find it

.3110227" 5/16" = .3125 and 19/64" = .296875" Them make the set of bits I refereed to in imperial and metric, pick your poison if I need metric I'll buy a single bit but I have the imperial set for just this reason.

 

[tim81]

Hemmm you got me lost here. You say I can use the sae ones as drill bits for the metric taps?

 

[verbotenwhisky]

Hemmm you got me lost here. You say I can use the sae ones as drill bits for the metric taps?

As long as it is close enough, yes. A proper thread chart will provide 3 drill sizes usually one for 60%, 75% and like 85 or 90% thread which translated to the thread class/fits A, B or C which allows you a bit of latitude if you can use a sloppy fit...

 

[tim81]

As long as it is close enough, yes. A proper thread chart will provide 3 drill sizes usually one for 60%, 75% and like 85 or 90% thread which translated to the thread class/fits A, B or C which allows you a bit of latitude if you can use a sloppy fit...

Whee can I read more about this so I don’t bother you with my nonsense

 

[tim81]

i found this link from little machine shop

https://mae.ufl.edu/designlab/Lab%20Assignments/EML2322L%20Tap%20Drill%20Chart.pdf

 

[Sticks]

Here

Bookmark this link, and put it on your phone also.

The calculator menu shows tap drill sizes, closest option, speed and feed....stupid handy tool to have.

 

[tim81]

pics here if anyone is interested in the as PNG files

 

[tim81]

Here

Bookmark this link, and put it on your phone also.

I am printing them right now. and as time goes i will buy what i need. it seems the imperial equivalent is something in the middle a bit tight for the coarse and a bit lose for the fine one. but for my practical need i thing i might be just fine for the moment.

Tim

 

[tim81]

already moved then to the phone. i found out handling the phone with hands with way oil on them to not be very smart on my part. so i will encapsulate them in thermoplastic sheets and attach them somewhere near to the mill.