| CPC G01B 5/008 (2013.01) | 20 Claims |

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1. A coordinate measuring machine, comprising:
a ram, configured as a fixed portion, comprising:
an interface, coupled to an interior of the ram, configured to retain a replaceable portion comprising one of a probe head, a sensor, or an articulated head unit,
wherein the replaceable portion is reproducibly mounted by means of a three-point bearing, wherein one or more of the probe head, the sensor, and the articulated head unit are arranged at least partially within the ram, wherein the probe head, the sensor, and the articulated head unit are configured to be interchangeable on the interface.
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