5 Cylinder Radial

[Bill Gruby]

This is Gospel Brian;

#1 = 135 to rack

#2 = 55 to 134

#3 = 35 to 54

#4 = 26 to 34

#5 = 21 to 25

#6 = 17 to 20

#7 = 14 to 16

#8 = 12 to 13


Billy G"

[Brian]

Thanks Billy,    These are numbered in reverse order!! this is a snip from the vendors site on E Bay.


  gear numbers.JPG (Size: 19.76 KB / Downloads: 93)

This info is on the side of the cutter also, Just visible in the photograph
So I live in hope
Brian

[Bill Gruby]

Yours is not the first time I've seen them in reverse order. I can't for the life of me figure out why. The numbers as I posted them have been standard since the changes from cast gears to cut gears, It all began with Pratt & Whitney I believe.

"Billy G"

[Vinny]

Prolly 'cuze someone thought that it made more sense to number it from low to high.

[Brian]

I think the Chinese read from bottom to top and Arabic is read from right to left. so that may have something to do with it.  it would be fascinating to find out.
 At one point during the 1950s I think, the French refused to introduce new words into there language that where not originated in France,so they invented new words to replace the imported ones. so it may be that the Chinese just want to do it their way.

Brian.

[Bill Gruby]

Bottom line here is that it is WRONG. That marking system will ruin your day in a heartbeat. This mismarking has been going on for a couple of years that I am aware of. Not good for sure.

"Billy G"

[Brian]

At last I seem to have produced a gear.

   

Now i must make the blanks  and cut the six  gears for the timing
Brian  

[arvidj]

(02-06-2017, 11:03 AM)Bill Gruby Wrote: This is Gospel Brian;
 ...

Bill,

Just curious, in what Book, Chapter and Verse is this written?

Arvid

[Bill Gruby]

The word "Gospel" only means it's true. In this case it has nothing to do with the Bible. Those numbers are what they are. With your comment I am done trying to help. This is from the industry.

http://www.newmantools.com/cutters/gear.htm

As you can see the metric (module) cutters are in reverse order. I have no clue as to why, but don't try to interchange them by number. I'm done with this.


"Billy G"

[Brian]

Hi Billy G
Thank for your time and input to try and help understand this problem.
Brian.