Laser 8877 User guide

Part No. 8876

STANDARDEXTENSIONS & ADAPTERS

8877

When using an extension or adapter
(increasing the eective length of the
torque wrench) the output torque
value will change. To calculate the new
torque output of the wrench use the
following formula:

A = Torque exerted @ end of adapter
L = Distance between square drive
and hand position
B = Wrench scale reading
C = Length of adapter or extension

A number of variables including the
length of the adapter or extension, length
of the wrench and variations in hand
position on the wrench will aect the
accuracy of the above calculation.

We calibrate each torque wrench at the
factory using torque standards
according to DIN ISO 6789 2017 & ASME
B107.300-2010, and certies it meets
the accuracy requirements of
specications DIN ISO 6789 2017 and
ASME B107.300-2010.

lbf-in

lbf-in kgf-cm
lbf-in lbf-ft
lbf-in
lbf-in
lbf-in
lbf-ft
lbf-ft kgf-m
lbf-ft
N-m
N-m
N-m
N-m
N-m
dN-m
dN-m
kgf-cm
kgf-cm
kgf-m
kgf-m

kgf-m
N-m
dN-m
N-m

lbf-in
dN-m
kgf-cm
kgf-m
lbf-in
lbf-ft
lbf-in
N-m
lbf-in
N-m
lbf-ft
N-m

Breakback Torque Wrench

Instructions

Apply revolving handle to turn
nut for torque adjustment

“Break Back Point”

WARINING

RISK OF FLYING PARTICLES

THE TORQUE WRENCH MAY ONLY BE USED FOR
THE CONTROLLED TIGHTENING OF SCREWS
AND NUTS.

THE TORQUE WRENCH IS A MEASURING /
TESTING INSTRUMENT AND THEY MUST NOT
BE USED TO LOOSEN SCREW CONNECTIONS.

FUNCTION DIRECTION: THE TORQUE WRENCH
CAN ONLY BE OPERATED CLOCKWISE TO
CHECK THE TORQUE (ACCORDING TO THE
MARKING ON THE TORQUE WRENCH).

NEVER USE TORQUE WRENCH TO BREAK
LOOSE FASTENERS.

NEVER USE TORQUE WRENCH AS A LEVER
BAR.

USE OF DAMAGED HAND TOOLS, SOCKETS,
EXTENSIONS AND ACCESSORIES MAY RESULT
IN INJURY.

DO NOT USE TORQUE WRENCH AS A HAMMER.

TORQUE WRENCHES NOT IN CALIBRATION
MAY CAUSE DAMAGE TO PARTS OR TOOLS.

DO NOT USE EXTENSIONS ON HANDLE AS
DAMAGE TO TORQUE WRENCH WILL RESULT.

OVER TIGHTENING OF FASTENERS MAY
RESULT IN BREAKAGE.

ALWAYS USE EYE PROTECTION
WHILE USING HAND TOOLS

WARINING

INJURY MAY RESULT FROM
ELECTRICAL SHOCK

HANDLE IS NOT INSULATED, DO
NOT USE ON LIVE ELECTRICAL OR
HIGH VOLTAGE CIRCUITS.

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CARE AND MAINTENANCESAFETY INSTRUCTIONSOPERATION

1. The torque wrench is a precision instrument,
and should be stored with care. Don’t
throw it around, use hammer with it, or use
it as lever bar.

2. The torque wrench is lubricated for life and
should not be oiled. The only exception is
the ratchet head which may be lubricated
as needed for smooth operation.

3. The torque wrench is a precision measuring
instrument. Calibration must be done
regularly to ensure accuracy and it’s the
owner’s responsibility. Suggested
calibration period is at least every 12
months or even shorter depending on
situation.

4. Always store the torque wrench in the box
after use to stay away from dirt and
humidity.

5. Never disassemble the torque wrench by
yourself. For any need to disassemble the
torque wrench or repair it, please look for
assistance from qualied service station.
Any incorrect action to disassemble the
torque wrench may result in damage to this
instrument.

6. Setting the torque value to the lowest scale
value after use.

7. The calibration of the torque wrench may
only be carried out by an authorised
laboratory or workshop.

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