back gear

noun

1. (in a lathe) one of several gears for driving the headstock at various speeds.

Other Words From

• backgeared adjective

Example Sentences

The head stock of a lathe—the back gear in particular—is about as hard a thing to improve as the link motion of a locomotive.

From Project Gutenberg

Referring again to Fig. 494, g′ is the pinion to drive the back gear while g receives motion from the back-gear pinion.

From Project Gutenberg

Another plan is to let the back gear move endwise and bush its bearing holes with hardened steel bushes.

From Project Gutenberg

As shown in the sketch, g is in one of these grooves while h is the other, but when the back gear is in, g would be in h.

From Project Gutenberg

Various methods of moving the back gear into and out of gear with the cone spindle gears are employed.

From Project Gutenberg