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TP20 touch-trigger probe components

TP20 probe body

  • TP20 guideHouses one half of the highly repeatable magnetic kinematic
  • Contains a magnetic proximity switch to inhibit triggering of
    the probe during automatic module changing with MCR20

NOTE: If the probe is operated close to magnetised parts/clamping etc, the probe trigger may become inhibited. Countermeasures include the use of long styli, stylus extensions or body orientation to increase the distance to the magnetic source. Alternatively, use the TP20NI probe body.

TP20NI probe body

  • Probe body not affected by magnetic fields
  • Probe trigger must be inhibited through software during change cycles using the MCR20

TP20 stylus modules

The TP20 stylus module houses the kinematic switching touch sensor mechanism, carries the stylus assembly and provides overtravel in ±X, ±Y and +Z axes (or ±Z in the case of TP20 6-way module). The stylus mounting thread accepts styli from the Renishaw M2 range.

A range of seven, application specific, stylus modules is available, being identified by coloured caps:

SFTP20 SF module

Standard force stylus module (black cap)

LFTP20 LF module

Low force stylus module (green cap)

MFTP20 MF module

Medium force stylus module (grey cap)

EFTP20 EF module

Extended force stylus module (brown cap)

6WTP20 6W module

6-way stylus module (blue cap)


Standard force extension module

EM2 SFTP20 EM2 module

Standard force extension module

Back to TP20

Probe maintenance - CK200 (A-1085-0016) is a specialised cleaning material supplied for the removal of contamination from the location faces of the magnetically retained kinematic couplings of the TP20, TP200 and SP25M probe systems. The frequency of cleaning should be determined by the conditions of use.


TP20 modules - dimensions


ModuleApplication guideMaximum extension on PH10 series headWeight (body and module)
LFThe low force stylus module, identified by a green cap, is suited to applications that require low trigger force, e.g. rubber seals.300 mm (11.81 in)22 g (0.78 oz)




The standard force stylus modules, identified by black caps, are suited to the majority of applications.

300 mm (11.81 in)

300 mm (11.81 in)*

300 mm (11.81 in)*

22 g (0.78 oz)

28 g (0.99 oz)

30 g (1.06 oz)

MFThe medium force stylus module, identified by a grey cap, is for use where a higher trigger force than standard is required.300 mm (11.81 in)22 g (0.78 oz)
EFThe extended force stylus module is identified by a brown cap. Typically, this stylus module will only be required with large stylus assemblies, and where spurious ‘air' triggers caused by machine vibration and acceleration, preclude the use of either SF, LF or MF modules.300 mm (11.81 in)22 g (0.78 oz)
6W The 6-way stylus module, identified by a blue cap, has been designed for applications requiring measurement in the –Z direction, for example when measuring the width of undercuts.300 mm (11.81 in)22 g (0.78 oz)

* NOTE: Dependant on CMM used and operating conditions.

Module typeLF

SF / EM1 / EM2




Test stylus length

10 mm

10 mm25 mm50 mm10 mm
Trigger force XY*0.055 N
0.08 N
0.10 N
0.10 N
0.14 N
Trigger force Z0.65 N
0.75 N
1.9 N
3.2 N
1.60 N
Overtravel force XY0.09 N
0.2 N to 0.3 N
0.2 N to 0.4 N
0.2 N to 0.5 N
0.25 N
Overtravel force +Z1.15 N
3.5 N
7 N
10 N
2.5 N
Overtravel force -Z-
9 N
Overtravel displacement XY±14°
Overtravel displacement +Z

3.1 mm

(0.12 in)

4 mm

(0.16 in)

3.7 mm

(0.15 in)

2.4 mm

(0.09 in)

4.5 mm

(0.18 in)

Overtravel displacement -Z----

1.5 mm

(0.06 in)

* Low force direction

Above data applies for test conditions as follows: Stylus length as stated above. Stylus velocity 480 mm/min (1.57 ft/min).

Part number

TP20 standard force module kit


TP20 medium force module kit


TP20 extended force module kit


TP20 low force module kit


TP20 6 way probe module


EM1 standard force module (71 mm long)


EM2 standard force module (96 mm long)


EM1 and EM2 standard force module kit