Rack and Pinion Gears

Hello Everyone,

I am doing a mold design with molded in threads. The thread is 8-32.217" deep. I am using the DME hydraulic Unscrewing Device. Theproblem is when you do the math the travel is very long, they sayto use a cogwheel in this case. I was wondering if anyone couldgive me some websites about these or give me some ideas on how toshorten the needed stroke. DME's rack uses 20 degree pressure anglewith 12 Diametral Pitch.

Stroke Formula:
Gear Pitch Circle Perimeter x # of revolutions required
3.142 x 7.5= 23.57"

Spur gear information that I am using at the base of my threadedcore:
Pitch Diameter: 1.00"
#of Teeth: 12
Internal Bore: .500"
Pitch Circle Perimeter: 3.142"
Outside Diameter: 1.16"
20 Degree Pressure Angle
12 Diametral Pitch

Thank you very much
Tony
SolidworksGeneral