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Rack
& Pinion Gears
A
rack is a toothed track. This track can be straight or curved. The
rack
can move or be stationary, but it does not rotate. The pinion is the
small gear that meshes with the rack. In White’s arc apple parer
(right) a rack and pinion is used to drive a spur gear that turns an
apple against the paring blade.
In
the Domestic by Landers Frary & Clark (left) a rack and pion gear is
used to push the apple off the fork once paring is completed. The Bergner
lathe
parer (below) uses a rack and pinion gear system to rotate the paring arm.

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