Ceramic Limited Stopper Gauge H7 (for Construction Work)

Brand :

NIIGATASEIKI

Caution

Product Description

Ceramic plug gauge has excellent durability that eliminates concerns about rust and corrosion on the measurement surface, and is exceptionally workable and economical.
[Features]
· A pair of gauges with external dimensions based on the maximum and minimum allowable dimensions as references.
· Can be used for obtaining fit compatibility between the hole and the shaft.
· Material with exceptional wear resistance in comparison with steel, which strongly resists changes over time.
· No concerns about rust or corrosion on the measurement surface, with extremely simple maintenance and management after use.
· Material with a thermal expansion coefficient almost identical to steel. Measurement surface is nonmagnetic material that will not become magnetized.
· There is little change in plasticity due to scratches or dents and there are no burrs or bulges.
· Includes an inspection results chart.
[Applications]
· Used for hole diameter inspections.

What is limit plug gauge

The gauge has two ends with standard maximum and minimum tolerable size of the hole.

Instructions for use

GOGO side ( can pass through the whole holes smoothly)
The GO side is used to check if the diameter of the hole which is bigger than the
maximum entity size【minimum tolerable size of the hole】, the gauge can go
through the hole completely.
NO-GO side (can not pass through the hole)
The NO-GO side is used to check if the diameter of the hole is smaller than the minimum
entity size【maximum tolerable size of the hole】, the gauge can notgo into the hole.

What is entity size
The volume of hole is the minimum when the
hole is finished with minimum tolerable size.
Therefore, the other volume except the hole
(this is entity size, the right drawing with slanted
portion) is the maximum, that is the maximum
entity size. The opposite meaning of above
mention is the minimum entity size.

Grade / same with the tolerance of the hole, plug gauge also has H6~H10.
The smaller the number the more precise it is.
Hardness / HV600~780

*Make sure there is no error on the grade.

Vickers hardness (HV):

Press the square pyramid shape diamond indenter against the
surface of the material to do indentation hardness test.

Precautions before use

Make sure the tip of plug gauge
without any burrs.
Burrs may hurt the hole.

Precaution after use

Remove all dust and fingerprints
then apply anti-rust oil.
Keep it at a place with small changes
in humidity and temperature.