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specIAl functIon IndIcAtors 696B Balancing Attachment
is furnished with the gage. For
certain applications, like turning
696, 696M crAnKsHAft dIstortIon dIAl/strAIn GAGe
the crank under test with the
2-3/8–18"/61–458MM gage in place, the attachment
Ideal gage for checking bearing alignment or shaft deflection without dismantling the engine. Also useful can be adjusted to maintain the
as a strain gage on engine frames. This inside measuring gage checks the distortion of crankshaft webs face of the indicator upward or
and bears a direct relation to existing misalignment or excessive bearing wear. Used on all diesel engine in desired position. To install on
shafts and center crankshafts on any type of engine or compressor, the gage can also be applied as a a strain gage in use, remove
strain gage on engine frames while the engine is operating. A comparison of readings taken at top and the knurled clamping nut, then
bottom positions indicates any misalignment of cylinder and frame which results in local over-stress and the doweled plate or end strap
eventual cracking of the frame neck. at either end by the screw. The IndIca tors and GaGes
unit is then positioned over the
With a special spring tension in the dial indicator, the gage is self-sustaining in any position without sacrificing hubs on two sides of the indicator
necessary rigidity, leaving the operator's hands free. Hardened and ground to a sharp point, conical contact head. A spring plunger provides
points have an approximate 60º included angle, and will stay in place on 45º surfaces.
the friction that holds the balance
in proper relation to position. The
parts are nickel plated.
The dial indicator movement is
approximately 5/32" (4mm) and
with rods and extension, provides
a range from 2 3/8-18" or 61-
696Z
458mm. There are 10 rods and
one extension furnished. Rods
are marked to designate the
approximate overall length of the
gage. Indicator has a movable bezel
to adjust the dial in relation to the
696 and 696M Crankshaft Distortion Dial/Strain Gages hand and a non-breakable crystal.
Dial Indicator Designed in collaboration with
Cat. No. EDP Range Graduation Dial Reading Range One Rev. Description Hartford Steam Boiler Inspection and
696Z 52901 2-3/8–18" .001" 0-20-0 .040" Strain Gage with Balancing Attachment
696MZ 52902 61-458mm 0.02mm 0-50-0 1mm Millimeter Strain Gage with Balancing Attachment Insurance Company. It was known
696B 52903 Balancing Attachment Only as the Hartford Steam Boiler Engine
Gage furnished with 10 rods, sharp points and balancing attachment in attractive, protective case. Strain Gage and is used by their
inspectors to check the distortion of

Fig. 1 Fig. 2 TO DETERMINE ALIGNMENT, SET THE STRAIN GAGE engine shafts and frames.
SO THAT IT JUST CLEARS CONNECTING ROD.

TURN ENGINE UNTIL CONNECTING
ROD NEARLY TOUCHES STRAIN
GAGE ROD ON OTHER SIDE AND
STRAIN GAGE APPLIED TO CRANK OF DIESEL TAKE A READING AT EACH QUARTER.
ENGINE TO DETERMINE IMPROPER ALIGNMENT.

Fig. 3 STRAIN GAGE OIL PIPE Fig. 4 696B Balancing Attachment
DISTORTION OF FLANGE STRAIN GAGE
CYLINDER FROM MISALIGNMENT C-CLAMP ON RIB
ENGINE
FRAME
DRAIN PIPE A CRACK FROM
UNSYMMETRICAL STRAIN
B
STRAIN GAGE
STRAIN BETWEEN APPLIED ENGINE FRAME (WHILE OPERATING),
MISALIGNMENT OF CYLINDER AND ENGINE FRAME DIFFERENCE BETWEEN TOP AND BOTTOM READINGS OF THE STRAIN
(SHOWN EXAGGERATED FOR PURPOSES OF ILLUSTRATION) GAGE INDICATES IMPROPER ALIGNMENT, CAUSING CRACKS.

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