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Showing results for back gear. Search instead for back-geared.

back gear

American  

noun

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


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The back gear is arranged to drive the spindle direct without the power requiring to be transmitted through a shaft, which induces vibration.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

In this machine the motion for both drilling and turning is received by belt on the cone pulley shown on the right, which is provided with back gear similar to that of a lathe.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

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 Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

The various motions of the machine are as follows: There are 16 speeds of work table, 8 with the single, and the same with the back gear.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

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

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

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