Microscopic dimension displacement is measured with high sensitivity.
Lever test (lever type dial gauge)
This has various usages such as measuring dimension, parallel level and spin finishing of work and measuring revolution axis of machinery equipment and swing of lathe processed thing and parallelism of table face of machinery equipment. This has strong point being sensitive for microscopic dimension displacement compared with standard dial gauge. As gauge head is leg type with edge ball, narrow space can be measured, where its edge ( standard φ2mm ultra hard ball ) can enter.
φ0.6mm, φ0.8mm, and φ1.0mm are available for this gauge rather than standard type.
Measurement example
Work is moved and measured of which flat face level, parallelism and outer swing etc. are fixed and lever test is fixed by holder or chuck. The right photo shows that work is measured with it fixed to discharge processing machining center.
As to other measurement method, this can be used for wide valuation since measurement is possible by rotating lever test side.

■Accurate usage of lever test
Gauge head of lever test needs to be kept at right angle.
Maintaining style, angle of gauge head and measuring direction of lever test is decided in line with shape of measured face. In this case, its gauge head needs to be kept at right angle as below for accurate measurement.
Please grasp lever test strongly enough.
Please be careful of grasping method, as measuring ability of lever test is low, it is rarely affected by measurement ability. However, when thin and long arm is adopted or fastening for grasp is loose, arm and grasp part are curved and indication is unstable and returning error will be large.

Connecting method when gauge head and measuring direction is not enough angle.
Correction method when angle between gauge head and measuring direction is in right angle.
When gauge head and measuring direction is not kept in right angle, and in case it is angle A and a distance from revolution center of gauge head to measured face is B in the following graph, change volume of measurement direction is resulted by correction to read dial by the following method.
(ex.) When lever test LT-310 type is used and A = 40°and dial figure is read as 0.05mm, coefficient from the graph is 0.77, change volume = 0.05…….w

Case not to be corrected
In case gauge head and measuring direction is not in right angle and it is to be corrected by coefficient, for instance when measuring error is accepted up to 10% of measured figure, if coefficient is 0.9 and above, it needs not to be corrected.

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