Quick Guide to Precision Measuring Instruments
Linear Gages
Gage Head
Precautions in Mounting a Gage Head • Insert the stem of the gage into the mounting clamp of a measuring unit or a stand and tighten the clamp screw. • Notice that excessively tightening the stem can cause problems with spindle operation. • Never use a mounting method in which the stem is clamped by direct contact with a screw. • Never mount a linear gage by any part other than the stem. • Mount the gage head so that it is in line with the intended direction of measurement. Mounting the head at an angle to this direction will cause an error in measurement. • Exercise care so as not to exert a force on the gage through the cable.
Plain Stem The plain stem has the advantage of wider application and slight positional adjustment in the axial direction on final installation, although it does requires a split-fixture clamping arrangement or adhesive fixing. However, take care so as not to exert excessive force on the stem.
Plain stem
ナット付ステム
ストレートステム
Precautions in Mounting LGH Series To fix the LGH Series, insert the stem into the dedicated stand or fixture.
Measuring Force This is the force exerted on a workpiece during measurement by the contact point of a linear gage head, at its stroke end, expressed in newtons.
Stem
Stem
Clamp screw
Clamp screw
Comparative Measurement A measurement method where a workpiece dimension is found by measuring the difference in size between the workpiece and a master gage representing the nominal workpiece dimension.
Clamp
Clamp
Recommended hole diameter on the fixing side: 15 mm +0.034/+0.014
• Machine the clamping hole so that its axis is parallel with the measuring direction. Mounting the gage at an angle will cause a measuring error. • When fixing the LGH Series, do not clamp the stem too tightly. Over- tightening the stem may impair the sliding ability of the spindle. • If measurement is performed while moving the LGH Series, mount it so that the cable will not be strained and no undue force will be exerted on the gage head.
Ingress Protection Code Protection code Type Level
G
Description
Protection against contact with the human body and foreign objects Protection against exposure to water Protection against contact with the human body and foreign objects Protection against exposure to water
Protection from dust ingress Complete protection against contact Water jets directed against the enclosure from any direction shall have no harmful effects. Protection from dust ingress Complete protection against contact Protection against the effects of immersion in water between 1 cm and 1 m for 30 minutes
6: Dust tight
IP66
6: Water-resistant type
6: Dust tight
IP67
7: Immersion- protection
Protection against entry of oil droplets or splashes from all directions
IP □□ G Protection against entry of oil
—
Need Support?
G-18
Powered by FlippingBook