How to do Backlash measurement of pinion-gear ?
IN TM shop was following problems can be analysed:-.
When three
teeth match, filler gauge is used to make one side gap NIL, then clearance
between other side gives the backlash.
Pinion Draw
measurement to be inspected.
a)
Color matching ( more than 90% ensured) sould be done for proper interference between two surfaces.
b)
Pinion inserted.
c)
Pinion drawn out , induction heated and
again inserted.
d)
Pinion draw= ©-(b)
Lateral and
longitudinal bogie clearances can be measured as in above picture .
Shown in above: Modified
stator clamps to hold bracing ring which protects overhang portion from
vibrations .
Greasing
nipple and bearing cover groove matching is necessary for proper greasing in
HITACHI motors.
The bearing
cover groove , if not in matching location, results in blockage of path. This
cover is supposed to be shrink fit but is press fitted in the shop.
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