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How big threads you can do with that one? Or how small?
Pekka
The chuck is a normal up-to-10-mm-chuck and it can therefore easily handle any tap put into it, although I tend to use it for taps between 3 and 8 mm. and those are not any problem at all.
When it comes to 10 and 12 mm taps I normally just start the tap using the tool and then change to a larger handle as the tapping stand handle is only about 10 cm across and for 10 and 12 mm taps it is very useful with a bit more leverage.
For taps below 3 mm I have made smaller chuck which also is lighter to avoid breaking taps just by dropping the tool onto the workpiece. The small tap tool looks as shown below.

Of course I did one other thing - a work light attachment from an old wall "spot light" from IKEA together with some bushes and voilá a useful lighting source. The pillar tool is mounted on the fitting/measuring/marking out table.
All in all, the pillar tool is just as versatile as stated in GHT's books and it works a real treat!
BR
/Peter