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Our deflection calculator makes it easy to calculate stylus deflection.

Simply enter the shaft diameter, wall thickness (if tube), and free shaft length.  Enter the probing force in grams, newtons, or ounces, and then select the shaft material from the drop-down box.  Click on "Calculate" for the result.

The published probing forces for several Zeiss and Renishaw CMM probe heads are listed below.  If you know which probe head you're using, just click on it to enter the minimum force value.  If you're unsure of the force of your probing system, it's best to check with the manufacturer.

Deflection Calculator

Stem/Shaft Deflection Calculator - Enter dimensions and material properties
Parameter Metric Units Imperial Units
Parameter Metric Imperial
Enter the outer diameter of your stem or shaft

mm

 in
Enter 0 for solid shafts, or wall thickness for tubing
 mm in
Enter the unsupported length of the stem/shaft
 mm in
Select a probe head below or enter force manually
 lbs
Select material type or enter custom PSI value
 PSI

Calculation results and error messages will appear here. Press Escape to clear.

V1.3.2

Standard probe head forces - Click on your probe head to set force

Standard probe head forces

Zeiss

Renishaw
XXT: 0.01 to 0.13 N, depending on stylus length. TP20 Standard Module: 0.08 N TP200: 0.02 N
DT: Selectable, 0.05 to 1.0 N TP20 Low Module: 0.055 N TP6/TP6A: 0.11 to 0.3 N
VAST XT Gold: Selectable, 0.05 to 1.0 N TP20 Medium Module: 0.1 N TP7M: 0.02 N
VAST Gold: Selectable, 0.05 to 1.0 N TP20 Extended Module: 0.1 N TP2: 0.07 to 0.15 N
Click on your probe head to set force.