Hello Gentlemen,Night Classes at County Tech School using Autocad Mech 2011Our latest assignment: Draw a standard 1" Drill Bit with a 1/2" Shank in 2D Model Space?Any suggestions or help with Industry standards: dimensions, angles and fillets would be very helpful and much appreciated  Thank You


RLRick0012015-07-19 16:13:40

Did you complete your assignment?

No Sir, Not Yet ~ We (our group) currently have two assignments that have thrown us for a loop ~ Hopefully I can get some help before we meet for collaborative effort? Any help would be greatly appreciated 

Why aren't you drawing it is 3D then extracting the 2D views?Is this going to be done in plain AutoCAD?Since you mention one inch I assume we are talking imperial units.  What are you using for a reference?
John Connor2015-07-26 21:12:58

We are older guys taking Night courses in drafting using Autocad Mechanical ~ The assignment is to draw a 2D 1" Drill Bit to be drawn and in a later assignment, inserted (scaled of course to any nominal size) into another 2D drawing assignment.

Hello RLRick001, I shouln't say this because it won't help you but as you are using AutoCAD Mechanical you should have access to normalized already drawings such as AMSTELSHAP2D, AMTHOLE2D, AMEXTHREAD2D, etc...If it's about drawing a standard 1" hole you should see this ( or read school books ) :https://books.google.fr/books?id=tesKAAAAQBAJ&pg=PA400&lpg=PA400&dq=autocad+mechanical+thread+in+inches&source=bl&ots=MP0xxCaxoQ&sig=-4amEMhYvuZIA4_tsi_cf9hlS6E&hl=fr&sa=X&ved=0CD4Q6AEwAmoVChMIxOKh7Ob6xgIVyNYsCh3fEQDQ#v=onepage&q=autocad%20mechanical%20thread%20in%20inches&f=falsePlease tel us if this helped or not and all about your home works, eventually post here a file of your 1" thread. P.S. Eventually see my file : METRIC_HEXAGONAL_BOLTS_B.dwg in the CAD/BIM Blocks library ( launch a search with the file name ).In that file you will find "the" bloc of the thread to be scaled and inslated at the right diameter.MIND THE VERY SPECIAL INSERTION POINT.This is valid only for metric threads and as I will be back in office only next week I will upload the one for inches thread then, but in that time you will have drawn yours of course.


philippe JOSEPH2015-07-27 10:01:03

Is this what you are attempting to draw?

*Our Instructor suggested many outside sources such as Cad Forum for help and suggestions to point us in the right direction ~ he also said we could expect some really good help and we should expect the No-Help kind of help.Philippe: Yes Sir, you are right ~ It didn't help much! We are Students ~ and as part of the learning curve, we are NOT yet allowed to access the special tools and libraries you mentioned. You listed information on holes, bolts and threads which are totally not relevant to my request. Thank you so much for your help Sir.John: No Sir, That is Not what we are attempting to draw. We are all working in a "2D" Autocad Mechanical environment ~ Not 3D Inventor! Yes, your image is indeed a drill bit...but a 3D image Not a 2D drawing. Thank you so much for your help Sir.

You obviously misinterpreted the image.  One...no reference to Inventor was made or implied.  Two...the image depicts a particular type of 1" drill bit with a half inch shaft.  You did not specify the "type" of drill bit.  Yes, I know it needs to be 2D.

John: Yes Sir I might have misinterpreted the image ~ Assignment is a 2d drawing of a standard 1" (wood or metal) drill bit with a 1/2" shaft. We are not sure of the intended result of this assignment. It is one of 23 more future assignments that we are working to complete before course end.Thank You

So what you are saying is that the instructor does not really care if you draw a spade bit (for wood) or one that might be used for masonry or metal (i.e. - a twist drill).  Is that correct?Any half way decent technical drafting book should have what you are looking for.  Spencer or French are two authors that come to mind.If you refer to page 195 of Thomas French's book "Engineering Drawing" you'll see a 2D depiction of a twist drill.

John Connor2015-07-27 18:39:50

A 2D representation of a twist drill with terminology.

We will check School and Public libraries for the book you referenced ~ Thank You

Or just use the above posted image.