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Member postings for Phil P

Here is a list of all the postings Phil P has made in our forums. Click on a thread name to jump to the thread.

<< First < Prev 38 39 40 41 42 43
Thread: hole size for tight fit
04/08/2011 13:03:25
I think he may mean "Presto"
 
Phil
Thread: Can Anyone Help Identify This Gear Please
27/07/2011 20:06:40
I have put a photo of a portion of gear teeth in my album.
I know it's OD and it's number of teeth so have already figured out it's DP.
 
Looking at the photo of the brown coloured gear can anyone offer an opinion of what the pressure angle is please.
I have included a photo of a silver coloured gear of the same size which is a known 14½° pressure angle for comparison, and a couple with them superimposed on each other. 
  
Has anyone got a "foolproof" easy way of determining this for certain, I have compared it to other known gears and also to various hobs and Sunderland cutters.
I think I know the answer but there is still some nagging doubt.
 
Thanks Phil
 
 

Edited By Phil P on 27/07/2011 20:13:55

Thread: Rust and how to remove it.
16/07/2011 21:15:13
I have used this for removing rust from antique musical box combs.
 
 
You can buy it in the UK here.
 
 
Phil

Edited By Phil P on 16/07/2011 21:16:46

Thread: No 4407 More Errors
04/07/2011 08:16:20
Posted by JasonB on 03/07/2011 16:17:27:
Is it a clock making thing or is there another reason that the OD of all the gearwheels in the clock article seem to be 10-20 thou over size using (teeth +2) *MOD?
 
Or is that why clock makers use a depthing tool rather than measure out the gear centres
 
J

Edited By JasonB on 03/07/2011 16:19:36

Jason

According to the clock wheel and pinion cutting book by J.M. Wild :-
 
For wheels the OD is (N + 2.76) x Module
 
For pinions of 6,7 & 8 teeth the OD is (N + 1.71) x Module
 
For pinions of 10,12 & 16 teeth the OD is (N + 1.61) x Module
 
That is assuming the tooth form to be cycloidal as opposed to involute.
 
Phil
 
Thread: I've made it now what to do with it
02/07/2011 20:19:07
If you donate it to a museum, they will probably sell it at some point anyway.
 
Do you not have any children in the family that might like it, and look after it ?
 
Phil
Thread: No 4407 More Errors
29/06/2011 19:37:53
Your post reminds me of when I was first trying to decide which model traction engine to build over twenty years ago.
 
All you ever used to read about then were errors in the published designs, and it was obvious that these designs had never actually been built prior to being published.
 
As a mechanical design engineer by profession, that was just not good enough for me and I made the decision to do my own design, drawings and patterns etc of a previously un-published traction engine.
That was a Ruston Proctor Class SCD tractor in 3" scale, That way I could only blame myself for any errors encountered.
 
At the same time I cancelled my subscriptions for ALL of the model engineering magazines, as they were not really helping me in any way, and to be honest were just full of adverts and regurgitated rubbish from previous years.
 
Obviously I made a good decision, because it looks like things have gone from bad to worse.
 
I never make anything these days unless I have personally designed it myself, or converted an existing design into a Solidworks 3D design to make sure it is correct.

Thread: Where Can I get a 1-1/2 dia x 1/16 slitting saw ?
18/06/2011 17:16:53
Steve
 
I have a 0.057" x 1/ 3/4" dia or a .0625" x 2" dia.
 
Those are the nearest I can do, let me know if either would be any good.
 
Phil
17/06/2011 18:54:58
I might have one that is 1 5/8" dia, do you want me to have a look.
 
Phil
<< First < Prev 38 39 40 41 42 43
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