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1936 SB 15" "N" series Standard Change Gears *INFO NEEDED*

M

Maple Grove Farm

Plastic
Joined
Jan 27, 2018
Been searching and can't find the info for this lathes standard change gear PA & DP. Purchased a 14.5 PA x 16 DP gear and it doesn't match up. Any idea what the DP & PA are for this lathe? Thank you for any information.
 
Pick up one you want to find DP - check it for freedom of burrs and reasonable cleanliness

Measure its OD and record

Count its teeth and add TWO to that count

Mic OD divided into sum is DP

PA will be 14 1/2 on an original

Example:

2.125" OD and 32 teeth

34 divided by 2.125 = 16 DP
 
N Series SB 15"

I'm aware that all SB have a 14.5 PA. The 32 tooth Spindle gear measures out to 2.420" 32+2=34 34/2.420 = 14, I don't find any gears with that DP. All the gears on the lathe mesh and work fine. ????
[ATT7[/ATTACH]HOFFMAN AND G E A R S 001.jpg32 tooth gear 001.jpg
 
14DP is no longer available off the shelf...need to make or have them made.

Or watch eBay...they pop up sometimes.

What' gears do you need? (Tooth counts)
 
I was thinking (wanting the challenge) of making some once my son's mill is up and running, we are newbies at this. But if I can find any before hand I would purchase 24,48,52,64 and 80 tooth.
 
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