Thread Chasing Dial - Acer Dynamic 3370X Operations Manual & Parts List

Heavy duty precison engine lathe
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4-8 Thread Chasing Dial

Dial indicates the engagement of the screw thread, in accordance to the attached
thread cutting chart in which thread pitches can be found, location of these worm
gears and engagement position of the lead screw, the dial indicator with the number
of the leadscrew rotates.
Inch with 8T the worm gear:
1. Thread cutting with 1/4 of the pitch time, only the alignment mark with a single,
repeated cutting of the original single point until complete as 2-1/4 2-3 / 4,2-7 / 8,
total one time.
2. Cutting thread 1/2 of the pitch, the angle may be aligned either of two
symmetrical scale line, such as the first target 1, the second 3 can be aligned, or
aligned with the first 2 , the second can be aligned with 4, 2 times.
3. Odd thread cutting teeth, you can align the mark of any four angles, such as
1,2,3,4. , total 4 times
4. Cutting thread is even thread, may be aligned at an angle of any tick of 8 times.
Metric with 10T, 11T, 12T, 13T, 14T of the Worm gear:
1. Cutting thread of 0.8,1.0,1.2 table data, use the worm gear 12T , any angle can be
aligned with the mark, total 8 times.
2. Cutting thread of 0.9,2.25 table data, use the worm gear 12T , any angle can be
aligned with any four angles of the mark, such as 1,2,3,4, total 4 times.
3. Cutting thread is 1.4,1.75,3.5 of table data, use the worm gear 14T can be aligned
with any two symmetrical angles scale line, such as the first aligned with second
time can be aligned with three ,total 2 times.
4. Cutting thread is 1.25,2.5,5.0 of table data, use the worm gear 10T can be aligned
either two symmetrical angles scale line, such as the first aligned with a second
time can be aligned with 3 , total 2 times.
5. Cutting thread is 8.0, please use the worm gear 12T can be aligned with any two
symmetrical angles scale line, such as the first aligned with a second time can be
aligned with 3,total 2 times.
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