| O P E R A T I O N |
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For Machines Mfg. Since 5/11 | 13" Heavy 13® Gearhead Lathe | |
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1⁄4 or 3⁄4 Fractional TPI
For TPI that have a 1⁄4 or 3⁄4 fraction, use position 1 on the thread dial (see Figure 84).
TPI
2¼,2¾, | Position |
3¼,3¾ | 1 Only |
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Chip Drawer
The chip drawer catches swarf and metal chips during the machining process. It contains a screen that prevents large chips from returning to the reservoir with the
Also, it slides open and is removable for cleaning (see Figure 86).
Figure 84. Position for 1⁄4 or 3⁄4 fractional TPI.
27⁄8 TPI
The thread dial is not used for 27⁄8 or metric threading, or diametral and modular pitches (see Figure 85). The half nut must stay engaged with the leadscrew throughout the entire threading operation.
27⁄8 | Same as | Thread Dial |
| Metric | Not Used |
Threads
Figure 85. Half nut stays engaged for 27⁄8 TPI.
Figure 86. Chip drawer.
The chip drawer is very heavy. Unless removing the chip drawer for cleaning, do not pull it out more than halfway; otherwise, it could fall out and cause a crushing injury. If removing the drawer for cleaning, get assistance!
