Jackson Brothers

Dual Reduction
Ball Drive

(SHW) 5411FS
6:1 ratio in both directions but 30:1 ratio for first turn when reverse direction. 1/4" shaft and bore. Output torque: 26 in/oz.
 

10:1 Ratio
Ball Drive

(SHW) 5870
Jackson Brothers 10:1 ratio ball drive. 1/4" shaft and bore. Output torque 78 in./oz. 3/4" center to center mounting holes.
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Ball Drive
Dial Assembly

(SHW) 4090
A handsome 6:1 Jackson Brothers ball drive complete with graduated 1-3/4" diameter 180 degrees dial plate, numbered '0-100'. 1" diameter knurled aluminum knob. Perfect control for air variable capacitors!
 

Ball Drive
Dial Assembly

(SHW) 4060SK
Jackson Brothers. All metal no plastic parts. Incorporates 1/4" 6:1 Ball Drive. 2" diameter body, 1-1/8" diameter knob. Output torque 26 in./oz. Made in England.
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