Instruments for size inspection, guiding profile VM

Plug gauge for measuring instrument for internal gears IVM 1x1 with guiding profile and 2 measuring ball inserts

The instruments of the type VM have a guiding profile, with which the dimension over balls can be established quickly and reliably, without rocking. The guiding profile is matched with that of the profile of the test item.

The VM inspection instruments display in this series their professionalism. They are robust, simple and with regard to accuracy independent of the operator. The range of VM instruments covers simple hand held devices, through to longitudinal dynamic inspection systems and fully automated FAPP systems. A UPM-certificate specifies the measuring uncertainty of the instrument and enables determination of the measuring uncertainty during usage.

The guiding profile (VMF) of VM instruments for splines can also be designed as a go gauge profile (VML) and can include pre-undersize or oversize (VMF/L). The advantage of this 'L-'design is that go gauging can be carried out at the same time which saves one operating cycle.

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VM 1x1
VM 1x1 consist of a profiled guiding mandrel and a measuring insert with 2 carbide measuring ball inserts. The measuring ball inserts are mechanically connected to each other. Both dial indicators and probes can be used. VM 1x1 instruments are mainly used to inspect medium-sized batches.

AVM 1x1 Instrument for external gearing inspection		IVM 1x1 Instrument for external gearing inspection		IVM 1x1 LDYN longitudinal dynamic

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VM nx2
All of FRENCO’s VM nx2 inspection instruments for gearing come with several measuring inserts (max. 3x2 insert). To determine the diametrical dimension over balls, two opposing, floating inductive probes are added to the display unit.

The types VM nx2 K work with carbide measuring ball inserts, which are screwed into the inductive probes. The carbide balls can be exchanged when worn. VM nx2 K instruments are particularly suitable for medium-size batches.
The VM nx2 RS models do not have any measuring balls but radius disks, which are clamped into a rocking body and can be turned when worn. RS instruments are very robust and resistant to wear.

It is recommended to use this type in high-volume production or with hardened workpieces. RS inspection instruments are suitable for automation (type FAPP).

AVM 3x2 Instrument for external gearing inspection		IVM 3x2 Instrument for internal gearing inspection		FAPP type with handling system

The following accuracies are achievable with VM nx2 instruments.

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Longitudinal dynamical evaluation LDYN:
All VM measuring instruments can be upgraded for dynamic measurements. A longitudinal dynamic adapter is added to the instrument. Evaluation is carried out with an electronic measuring unit and the gear and spline software LDYN.