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8th May 2021, 06:00 PM #1Most Valued Member
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Metric threading on Imperial 9"AR Hercus
I have a imperial 9" Hercus AR.
And a gear set for metric and maybe other stuff I bought through AMH a few years ago.
The transition gears (Right Name ?) are not the 100 to 127 bushed pair but the 60 to 63 bushed pair.
My other loose gears are 46 44 42 36 33 30 27 24
The chart for the imperial to metric conversion below just describes the MM pitch range using the 100 /127 transition gears on the compound position.
If that's the correct description again .
Hercus (2).JPG
So with my 60 to 63 bushed gear . Do I just use this chart and use the 60 / 63 where it says to use the 100 to 127 ?
Or is there another chart describing the gear set up for the 60 to 63 that is different from the one above ?
I have scoured AMH looking for it but had no luck .
Or is it in the Hercus TBOT? I only have the later 260 lathe edition of that atm . Waiting on an early copy atm .
Thanks . Rob
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