PLUG GAUGES FOR LAMPHOLDERS B22 7006-12-8
For details of lampholders BA21, B15 and B22, see sheets 7005-15,
7005-16 and 7005-10 respectively.
PURPOSE: To check dimensions Amin, Amax, Bmin, D1min, Nmax and the
diametrical position of the slots of lampholders BA21, B15 and B22
TESTING: It shall be possible to insert the GO side of the gauge into the
lampholder and turn it so that the pins pass the lowest points of
the retaining slots and reach the seating point without using undue
It shall not be possible to insert the NOT GO side of the gauge by
its own weight.
This test shall be made at least twice, the gauge being turned
through approximately 90° the second time.
In case of "all ceramic" construction, the NOT GO side can be
inserted by its own weight, but not in all positions. The
lampholder shall further fulfil the test of the gauge shown on
sheet 7006-12D (B15) or 7006-12B (B22).
(1) The gauge for BA21-3 lampholders shall have the three pins
disposed at angles of 120° as shown on sheet 7004-13. The angular
tolerance shall be ± 15’.
HK LEE HING INDUSTRY CO., LIMITED are specialized in manufacturing special, custom built, test and
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