Gear Blank Help.

[redlee]

Im trying to make a hand crank, what I need is 2 identical gears with a 2.25 center distance. Speed is slow number of teeth doesnt matter,
Ive been trying to decipher the gear info in Machinery handbook and online and my old brain isnt working. I have 3 gear cutters , just wondering if someone can give me a OD size and number of teeth I need to make them.
Thanks.

 

[3DDave]

I can't read the corroded numbers - what is stamped into those?

 

[redlee]

6 NDP 14.5 PA No8 12T-13T

7DP-1-#5

#6 - 8 DP 14.5 PA

I can read the pics fine, I could try and repost ?
Thanks

 

[redlee]

Hope this is better.

 

[redlee]

Hope this is better.

 

[redlee]

Hope this is better.

 

[BrianE22]

The gear pitch diameter = #teeth/DP. A 2.25" center distance would make each of the 2 gears have a 1.125 pitch diameter. For the 8 DP cutter the number of teeth would be 1.125 x 8 = 9 teeth. Someone better check me!!! (I'm old).

 

[redlee]

Any idea about OD size ?
Thanks

 

[3DDave]

See

https://www.bostongear.com/-/media/...ns/p-1930-bg_engineering-info-spur-gears.ashx

 

[spigor]

My results are:

8DP 14.5PA
Cutter #6 - 17T to 20T
18T
OD 2.500
Span measurement over 2 teeth, nominal: .582

 

[redlee]

Thanks all !

 

[spigor]

redlee,
did it work?

 

[redlee]

Sorry it took so long but yes it worked, it was for my brother and he reported all good Thanks again.