Atlas Craftsman 6" Lathe 101, 618.  24 Tooth Gear Part # MF-4A
This fine Nylon gear has improved design for better durability and performance
 compare to OEM and superior to other replacements

US made out of Nylon - tough and flexible plastic
Nylon naturally slippery, no lubrication required!
Runs quieter and smoother 

Only Nylons should be used for gears where a slippery surface is desired.
  All other materials (PLA, ABS, PET, etc.) will grind creating a plastic dust and eventually fail!

For details, please review all pictures

May fit other 3/8" bore lathes as well.

Tooth count 24
DP 24
O.D. : 1.083" (27.5mm)
Gear face width: "3/8" (9.52mm)
Center bore: 3/8"  (9.8mm)
Radial Pin hole 1/8"