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For fractional TPI: Numbers 2 or
4, 1 or 3, or any two opposing
marks can be used.
For all other even numbered
TPI: Any number or mark can be
used. Note: Since the leadscrew
is 4 TPI, then the thread dial is
not needed for any thread that is
divisible by 4.
Thread Dial
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ndj `cdl l]ZgZ dc i]Z aZVYhXgZl ndj XVc gZ"
Zc\V\Zi]Z]Va[ cjiidgZhjbZ^cX]dgl]^ildgi]
i]gZVY^c\#=dlZkZg!h^cXZi]ZaZVYhXgZl^h)IE>!
i]Zci]Zi]gZVYY^Va^hcdicZZYZY[dgVcni]gZVY
i]Vi^hY^k^h^WaZWn)#;dgi]gZZZmVbeaZh!gZ[Zgid
i]Z>cY^XVidgIVWaZ^cFigure 65VcYhZZFigure
66[dgY^VaadXVi^dch#
;dgbZig^X!Y^VbZig^Va!VcYbdYjaZi]gZVY^c\!i]Z
i]gZVY Y^Va ^h cdi jhZY VcY ndj bjhi aZVkZ i]Z
]Va[ cji aZkZg Zc\V\ZY jci^a i]Z i]gZVY^c\ _dW ^h
XdbeaZiZ#
Figure 66.I]gZVYY^VajhZ#
NOTICE
Always use the slowest speed possible for
threading, and avoid deep cuts or you may
not be able to disengage the half nut to
prevent an apron crash!
For 3, 5, 7, 9, 11, 13, 15, 19, 23, 27
odd TPI: Any four grouped num-
bers or marks can be used.
Figure 65. >cY^XVidgiVWaZ#