Vira 162140, Instruction Manual

Page: 35 / 68

Replacing the dies
Replace the thread dies when the thread loses quality or the turnings become broken up. You
should also replace them when you wish to use another thread standard.
Two die types may be used:
alloy steel dies for cutting threads in carbon steel (see page 11 for the standards defining
carbon steel tubes)
high-speed steel dies for cutting threads in stainless steel tubes (see page 11 for the
standards defining stainless steel tubes). These dies are marked “HSS” (for “High Speed
Steel”) engraved on the face opposite the die.
Important:
1) There are specific dies for each thread standard: BSPT dies, NPT dies, etc.
(The thread standard is engraved on the face opposite the die).
Make sure you insert the correct dies for the thread standard you are going to use.
2) The four dies must be replaced with four new dies supplied exclusively by Virax.
) The dies are numbered as each die works separately. Ensure that each die is placed in the
corresponding socket: die no.1 in socket no. 1, die no.2 in socket no.2, etc.
Note: The die head does not have to be removed in order to replace the dies.
Replacing dies on the 4” head
First retract the dies by moving the opening cam to the right:
Important: This can only be done with the head at rest.
Be careful to avoid holding the cam by the rear in case the head lever falls on
your fingers.
Raise the die head.
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