©
FAR GROUP EUROPE
Inner thread:
- When cutting an inner thread, the speed remains the same for an equivalent diameter,
- The gear settings are the same. Nevertheless, you need to calculate the bore diameter
and penetration depth. To do this, use the following formulas:
The other hand remains in place on the machine stop button
Tighten the part into the chuck - Bore to a diameter of 17.3 mm, Raise and rigorously
position the tool by bringing it out by twice the length to be machined, for once again
there is no footbrake available for use,
Start up the machine and place the tool at a tangent to the bore,
Disengage the tool to the right on removing it from the part, Take a 0.5 mm cutting
depth (for the first pass only), i.e. 10 divisions on the Vernier callipers, Stop the machine,
engage lever 2 (leadscrew clutch),
Lubricate the part with cutting oil,
Start up and place one hand on wheel 14 to disengage the tool (when it reaches the
desired thread length or the end of the bore, for a full length thread).
BORE DIAMETER FOR A THREAD OF
M 20 X 2,5 =
D - ( 1,08 x P ) =
20 - ( 1,08 x 2,5 ) = 17,3
PENETRATION DEPTH FOR A 2.5 MM PITCH:
0,577 X P
0,577 X 2,5 = 1,3925 to radius
WARNING: To disengage the tool, turn the wheel clockwise for an inner
thread
External
thread on the
right
114135-Manual-D-EN.indd 21
21/03/12 10:45:00
Summary of Contents for TDM 400B
Page 5: ...FAR GROUP EUROPE SLAVED SAFETY CASING 114135 Manual D EN indd 5 21 03 12 10 44 23...
Page 13: ...FAR GROUP EUROPE 114135 Manual D EN indd 13 21 03 12 10 44 55...
Page 29: ...FAR GROUP EUROPE FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 29 21 03 12 10 45 06...
Page 30: ...FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 30 21 03 12 10 45 06...
Page 31: ...FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 31 21 03 12 10 45 06...
Page 32: ...FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 32 21 03 12 10 45 07...
Page 33: ...FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 33 21 03 12 10 45 07...
Page 34: ...FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 34 21 03 12 10 45 07...
Page 35: ...FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 35 21 03 12 10 45 08...
Page 36: ...FAR GROUP EUROPE TDM 400B 114135 Manual D EN indd 36 21 03 12 10 45 08...
