gefran 85180 - 02/03 Manual De Uso Y Mantenimiento página 6

CORRECT INSTALLATION
Preparing the housing
Drilling kit
A drilling kit with shaped tools for
drilling, reaming and tapping is
available to facilitate
preparation of the assembly housing.
The assembly housing must be
perfect to assure proper transducer
function and long life.
Drilling kits are available in the
following versions:
KF12, KF18
Drilling procedure
1) Drill the hole with the bit
(tool 1).
2) Ream the hole with the reamer
(tool 2).
3) Drill hole (d4) up to a distance from
the hole equal to the sum of (a+b+c)
(tool 3).
4) Make the housing at a distance from
the hole equal to (a) (tool 4).
5) Make the 1/2-20UNF-2B threading
with the tool (recognizable by the
greater number of threads beveled to
ease insertion) (tool 5).
6) With the tool, re-do the 1/2-20UNF-
2B threading up to a distance from the
bottom equal to the sum of (a+b) (tool
6).
DRILLING TOOL KIT
VERSION CODE
THREADING TYPE
1
2
3
4
5
6
WRONG
WRONG
Check the dimensions of the
assembly housing
The dimensions of the assembly
housing have to be checked after
preparation and before the transducer
correct is installed.
To do this, use closing rod SC... as
follows:
1) Coat the end of the rod with the
appropriate ink.
2) Lubricate the threaded part to
prevent friction.
3) Insert the closing rod and screw it
fully down.
4) Remove the rod and examine it.
With the exception of 45° surfaces,
the ink should be intact on the entire
surface.
contact surface
WRONG
RIGHT
KF12 KF18
1/2-20UNF-2B M18x1.5
Ø 7.6 Ø 9.75
Ø 7.95 Ø 10.1
Ø 13 Ø 20
Ø 11.5 Ø 16
with pilot with pilot
guide guide
1/2-20UNF-2B M18x1.5
roughing roughing
1/2-20UNF-2B M18x1.5
finishing finishing
6
Installing the transducer
Installation
After having lubricated the threaded
part of the transducer, install it using a
maximum tightening torque of 50 Nm
(5 Kgm / 500 in-lb).
Removal
To remove the transducer from its
housing and continue the procedure,
closing rods with identical mechanical
dimensions are available.
The closing rods differ by type of
threading; applicable pressure is 2000
bar for all rods.
The closing rod is available in the
following versions:
SC12 1/2-20UNF housing
SC18 M18x1,5 housing
Brackets
Models with flexible sheathing require
precise fastening of the protective
housing of the measurement point.
We recommend bracket (SF18) for
fastening. Remember that the
fastening point must be vibration-free
(vibrations affect the measurement)
and that temperatures must not
exceed the maximum temperature for
the strain gauge housing (as stated on
the technical sheet for the transducer).
Starting the extruder
Bring the system to work temperature
with the transducer installed and
without any pressure applied.
Wait until all the material is at the
same temperature to prevent any
parts that are still solid from damaging
the transducer.