OTC 73757377 User manual

Micrometer
Adjustable
Torque Wrenches
Part Nos. 7375
7377
7378
7379
Operating Instructions
Certification
This torque wrench was calibrated prior to shipment
fromthefactorywithtolerancelimitsof±3%clockwise
(right-handed) accuracy of upper 80% of range.
NOTE: Part No. 7379 has tolerance limits of ±4%
clockwise (right-handed) accuracy, and ±6%
counterclockwise (left-handed) accuracy.
Limited Warranty
Untiloneyearfromthedateofpurchase,wewillrepair
any defect in material or workmanship free of charge.
Improper use of these products, including but not
limited to the application of excessive force, will affect
performance and may result in injury. The warranty
does not apply to wrenches which do not function
properlyorwithinspecifiedaccuracybecauseofwear,
improper or unreasonable use, damage not resulting
fromdefectormalfunction,orwhichhavebeenaltered.
Calibration is warranted for 90 days.
This warranty gives you specific legal rights, and you
may also have other rights which vary from state to
state.
Forrepairorcalibration,sendwrench,postageprepaid,
to: Angle Repair Service, Inc.
175 Angle Drive
Beckley, West Virginia 25801
SPX Corporation
655 Eisenhower Drive
Owatonna, MN 55060-0995 USA
Phone: [phone]
Tech. Serv.: [phone]
Fax: [phone]
Order Entry: [phone]
Fax: [phone]
International Sales: [phone]
Fax: [phone]
Form No. 106510
© SPX Corporation 10-12-2000
Features
•
Operates and ratchets in both right- and left-hand
directions.
•
May be used for uncontrolled wrenching as long as
torque does not exceed maximum capacity.
•
Lock ring prevents accidental change of torque
setting.
•
Allpartscorrosion-proofed.Wrenchmadeofhighest
quality heat-treated steel, and finished with tough,
durable chromium-nickel plating.
•
Hand grip is impervious to fluids such as gasoline,
oil, and kerosene.
CAUTION:Topreventpersonal
injury when using these torque
wrenches, wear eye protection that
meets ANSI Z87.1 and OSHA
standards.
Grip
Lock Ring
Thimble Scale
Main Scale
ll
ll l
ll
ll l
ll
ll l
ll
ll
l

Adjusting the Torque Wrench
IMPORTANT: To prevent damage to the adjusting
mechanism, do NOT turn the GRIP with the LOCK
RING in the lock position.
Examples of Torque Settings
ThemainscaleAmericanStandardgraduationsareon
thefrontoftheshaft,andthethimblescalegraduations
are closest to the beveled edge.
The main scale Metric graduations are on the reverse
side of the shaft, and the thimble scale Metric
graduations are below the American Standard
graduations.
American Standard
1.Foratorquesettingof94footpounds,rotatethegrip
until the “0” on the thimble scale is aligned with the
“85” on the “ft. lb.” main scale.
2.Continue rotating the grip
clockwise until the “9” on the
thimble scale is aligned with
the center line on the “ft. lb.”
mainscale. The wrenchis now
set at 94 ft. lbs. (85 + 9 = 94).
How to Apply Torque
The Micrometer Torque Wrenches are designed to
give an audible signal and/or impulse when force has
beencorrectlyappliedtothehandgrip,andthedesired
torque attained. Do NOT pull beyond this point.
IMPORTANT:
•
The audible signal / impulse is an indicator that the
correct torque has been reached. Over torquing
beyond this point could cause fastener failure.
•
Do NOT tilt the torque wrench handle during a
torquing operation. Tilting the handle can result in
inaccurate torque and/or over-torquing damage.
NOTE: When the wrench is set at the low end of the
torquerange,thedegreeofsignal/impulsewillbeless
than when the wrench is set at the high end of the
range. Therefore, take special notice at the low end of
the scale to hear the signal or feel the impulse.
1.Securelyattachasockettothetorquewrenchsquare
drive.
2.Position the socket squarely on a fastener.
3.Grasp the center of the hand grip, and apply a force
perpendicular (90 degrees) to the torque wrench
body, and perpendicular (90 degrees) to the center
line of the square drive, socket, and fastener.
1.To unlock the torque wrench,
hold the handle grip with one
hand, and turn the lock ring
clockwise until it stops.
3.Putthelock ring in the lock positionbefore usingthe
wrench.
Metric
1.For a torque setting of 105.8 Newton meters, rotate
the grip until the “0” on the thimble scale is aligned
with the “104.4” on the “N•m” main scale.
2.Continue rotating the grip
clockwise until the “1.4” on the
Metric thimble scale is aligned
withthecenterlineonthe“N • m”
mainscale. The wrenchis now
setat 105.8N • m(104.4 +1.4=
105.8).
3.Putthelock ring in the lock positionbefore usingthe
wrench.
IMPORTANT:Topreventdamagetothetorquewrench,
NEVER apply more torque than the rated capacity of
the wrench.
2.Rotate the grip until the “0” on
the thimble scale reaches the
primary number of the desired
torque value on the shaft main
scale.
3.Continue rotating thegrip if the
desiredtorquevalueisbetween
the primary numbers on the
mainscale.Add the secondary
numberon the thimblescale to
theprimarynumberonthemain
scale to achieve the desired
torquevalue.Referto Examples
of Torque Settings section.
4.To lock the wrench, hold the handle grip with one
hand,and turn thelockring counterclockwise untilit
stops.
NOTE:
•
Grasp the GRIP, not the SHAFT.
•
Clean thread surfaces and remove burrs from
fasteners.
•
It is not necessary to return this wrench to its lowest
calibratedvalue after use,unless it willbe stored for
an extended period of time.
NOTE:Maintain the common centerline of thesquare
drive, socket, and fastener while applying a steadily
increasing force – this ensures an accurate torque
reading.
4.Turn the fastener down using a smooth and even
force applied to the handle of the torque wrench. As
turning resistance increases, pull more slowly. To
ensure accuracy, the fastener must be in motion
when the torques measurement is made.
90°