Hole wizard countersink incorrect?
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From: ahoneyfield on 6 Mar 2007 16:54 We used the hole wizard to create countersunk holes for 8-32 cross recessed flat head screws. Parts were CNC machined and, surprisingly, the screws don't sit flush! Checking back on the model, the countersink is created with a 100 degree angle. Our Engineers Handbook says the standard for such screws is 80 / 82 degrees. Anyone else ever had this problem? What other nasties are out there?
From: Michael Eckstein on 6 Mar 2007 17:04 No nasties- you have the option in the hole wizard for 82 or 100 degree C'sink, the angle is in (82) or (100) format. Take a closer look at the manager Mike Eckstein <ahoneyfield(a)gmail.com> wrote in message news:1173218043.535193.30670(a)j27g2000cwj.googlegroups.com... > We used the hole wizard to create countersunk holes for 8-32 cross > recessed flat head screws. Parts were CNC machined and, surprisingly, > the screws don't sit flush! > > Checking back on the model, the countersink is created with a 100 > degree angle. Our Engineers Handbook says the standard for such > screws is 80 / 82 degrees. > > Anyone else ever had this problem? > > What other nasties are out there? >
From: ahoneyfield on 6 Mar 2007 19:28 On Mar 7, 9:04 am, "Michael Eckstein" <mike.ecksteinONOSPAMH...(a)ONOSPAMHEREcharter.net> wrote: > No nasties- you have the option in the hole wizard for 82 or 100 degree > C'sink, the angle is in (82) or (100) format. Take a closer look at the > manager Michael, I checked and you're right (of course). Thanks. Now to get some 100 degree screws... A.
From: brewertr on 6 Mar 2007 19:36 On 6 Mar 2007 13:54:03 -0800, ahoneyfield(a)gmail.com wrote: >We used the hole wizard to create countersunk holes for 8-32 cross >recessed flat head screws. Parts were CNC machined and, surprisingly, >the screws don't sit flush! > >Checking back on the model, the countersink is created with a 100 >degree angle. Our Engineers Handbook says the standard for such >screws is 80 / 82 degrees. > >Anyone else ever had this problem? Hole wizard gives lots of options sometimes people don't take care to choose the correct ones. In your case from the "Type:" pull down menu,"Flat Head Screw (100)" was chosen when "Flat Head Screw (82)" was the correct choice. > >What other nasties are out there? Lots where ever people are involved. Tom
From: jefrado on 7 Mar 2007 08:30
Sorry, I agree with the orginal post. Why would anyone set up the default to something weird? Another issue - standard fine thread is 1-14 -- try getting a 1-12 as the wizard suggests (even more bizzare, so does the machinery handbook). . The usefulness of this feature is that you don;t have to look stuff up (after all its mostly correct) or draw it. |