Operating Manual
Tangential Rolling System T18F - T27F
39
NOTICE
The workpiece major diameter d should not have a burnished finish or be
over-formed after rolling in the thread tips. That is, no overpressure should
occur which could lead to increased roll wear.
If you have adjusted the distance between the axes with the setting gauge (see
Chapter 6.3) and pre-machined the blank diameter in accordance with Chapter 5.2.1,
you should normally receive a non-formed thread tooth (tooth 1). It is possible that the
pitch diameter d
2
may be slightly too large and the major diameter d too small. In this
case, adjust the settings as follows:
1. Reduce the distance between the axes (see Chapter 8.1). This makes the rolling
head more narrow and the pitch diameter smaller.
2. The reduction of the distance between the axes means that more material is
pressed into the tip of the tooth. This automatically makes the major diameter of the
thread larger.
a) If the pitch diameter is correct after the distance between the axes has been
adjusted, but the thread tooth is over-formed, you will have to reduce the blank
diameter d
A
to ensure that less material flows into the tooth tip (see Chapter
5.2.1). It may be necessary to slightly increase the distance between the axes.
b) If the pitch diameter is correct after the distance between the axes has been
adjusted, but the major diameter is too small, you will have to increase the blank
diameter. This means that more material will flow into the tip of the tooth. It may
be necessary to slightly reduce the distance between the axes.
If the result is still not satisfactory despite making the adjustments, refer to Chapter 9.
8.1 Correcting the distance between the spindels
If the workpiece major diameter d or the workpiece pitch diameter d
2
is too small and/
or the thread is not rolled out, it will be necessary to correct the distance between the
spindels.
To correct the distance between the axes, proceed as follows:
■ Loosen the set screws (28)
■ It is now possible to turn the set screws (30). Clockwise: the distance between the
axes is reduced. Counterclockwise: the distance between the axes is increased.
Only turn the set screws in small steps! A partial step on the scale roughly corres-
ponds to a distance between axes of 0.15 mm l 0.06 inch for T18F and 0.2 mm l
0.08 inch for T27F
■ When the distance between the axes has been corrected, retighten the set
screws (28).
After adjusting the distance between the axes check whether the set pendulum clear-
ance is still sufficient.
LMT_Bedienungsanleitung_T18F_T27F_e.indd 39 02.08.11 17:40
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