Huvema HU 480 X 2200 VAC TOPLINE, Instructions Manual

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5-3 Thread Dial Indicator
1. Thread dial indicator for Imperial leadscrew
To cut even number threads the leadscrew can be engaged on any number or
line. For odd number threads the leadscrew can be engaged on any number.
Fractional threads (1/2, 1/4 etc.), leadscrew can only be engaged on the same
number or line.
Note: When cutting metric threads on a lathe with an Imperial leadscrew, be
sure the half nut is engaged at all times. (If not, the thread will not repeat.)
2. Thread dial indicator for Metric leadscrew for cutting metric threads
There are two dials used for metric leadscrews, 2 & 7 divisions and 3 & 5
divisions. To cut threads with pitches of 1.25, 2.5, 5.0, 2.25 and 4.5, use the 3 &
5 division dial. For the balance of threads , use the 2 & 7 division dial. For
cutting thread pitches of 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0 and 6.0, use the 14T
worm gear and 2 & 7 division dial. The Maximum number of divisions on the
dial are 7, however, you can only engage the dial on 2 of these numbers.
Gear
Pitch
Dial
Halfnuts Engaged Number
Teeth Division
11T 2.75 5.5 2 1
13T 3.25 6.5 2 1
1.75 3.5
2
1.2
7
14T
0.5 0.75
1 1.5
7 1,2,3,4,5,6,7
2 3
4 6
1.25 2.5
3 1,2,3
15T 5
2.25 4.5 5 1,2,3
18T 6.75 2 1,2
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