Husky H3DTWDIG - User Manual

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3/8 in. Drive

Digital Display Click Style

Torque Wrench

Owner’s Manual Model No: H3DTWDIG

SAFETY RULES

1. STUDY THIS BOOKLET CAREFULLY BEFORE ATTEMPTING

TO OPERATE THIS WRENCH.

2. Never apply more torque than the maximum scale

reading.

3. This torque wrench is designed for manual tightening of

threaded fasteners only. DO NOT USE IT AS A NUTBREAKER

OR FOR ANY OTHER PURPOSE.

4. Over-torqued or defective fasteners and sockets may

suddenly break. Ratchets that are improperly engaged,

worn out, damaged, or over-torqued may slip or break.

TO PREVENT INJURY, KEEP PROPER FOOTING AND

BALANCE AT ALL TIMES. DO NOT USE THE WRENCH IN

PLACES FROM WHICH YOU MAY FALL OR SLIP, OR

AROUND OPERATING MACHINERY.

5. This wrench will not prevent you from applying more

torque than set, it is not a torque limiting tool. The LCD

display will flash “STOP” if you exceed either the lower or

upper limit of intended use. At low settings the release is

gentle and there usually is no audible ‘click’ signal. Learn

how different amounts of torque ‘feel’, so you will reduce

the possibility of damage and/or injury due to accidental

over-torquing.

6. APPLY FORCE TO THE GRIP ONLY. DO NOT USE ‘CHEATER

BARS’ (a piece of pipe placed over the hand grip).

7. There are no user-serviceable components inside the

wrench. Disassembling the wrench or making any

adjustments will result in the loss of accuracy, and will

void the warranty.

OPERATING INSTRUCTIONS

Before adjusting the wrench to the desired torque setting,

make sure that you are using the correct torque units.

Torque values may be displayed in units of Inch Pounds, Foot

Pounds, Newton Meters, or Centimeter Kilograms.

Your Husky Digital Style Click Torque Wrench is calibrated

in Foot-Pounds (default on the LCD display) and can be

changed to other units as desired.

WARNING: DO NOT turn the adjusting knob either below the

lowest scale reading or above the highest scale reading. The

LCD display will show torque settings beyond the calibrated

upper and lower limits of your torque wrench,these are

intended for adjusting purposes only and are not within the

calibrated range.

WARNING: DO NOT use the wrench when batteries are not

installed or when batteries do not have sufficient power to

operate the wrench

TO SET TORQUE

1. Press the red PWR button to turn the wrench on.

2. At initial power up, the LCD display will flash all icons

twice and then show the current torque setting. When

stored or not in use, the wrench should be set to less

than 25% of the maximum capacity.

NOTE: The battery level indicator on the LCD display will

indicate the remaining battery life.

3. Press the green UNIT button to toggle through desired

units (ft-lb, in-lb, N-m, kg-cm)

4. Pull the adjusting knob out to unlock the adjusting

mechanism.

5. While holding the adjusting knob unlocked, turn it

clockwise to increase the torque, and counterclockwise

to decrease torque. Keep turning until the desired

TARGET torque reading is displayed on the LCD screen.

6. If during a torque setting adjustment the intended

TARGET value is exceeded on the LCD display, the

torque wrench should be first adjusted back to below

the TARGET value, and then back up to the intended

TARGET value.

7. Lock the setting by releasing and, if necessary, pushing

the adjusting knob in. The knob can be turned slightly

back and forth without changing the torque setting to

assure proper engagement of teeth in the locking

mechanism.

8. Press and hold the red PWR button for 2 seconds to turn

the wrench off. This torque wrench has an automatic

shut off feature and will power down after 10 minutes

of non-use.

9. To turn the LED back light on or off, press and hold the green

button for 2 seconds.

NOTE: The TARGET torque setting and units will be saved

after shut off. If the torque is adjusted while the power is

off, the correct torque target will be displayed at the power

on screen .

TO APPLY TORQUE

1. Attach the proper socket or other attachment to the

drive. Set the reversing lever of the proper direction of

the operation.

NOTE: If special attachments are used, torque setting must

be corrected in accordance with the directions given below

in the extensions section.

2. Place the socket or attachment onto the fastener to be

torqued.

3. Utilizing the ratcheting head, you may ‘spindown’ the

fastener until resistance is felt.

4. Holding the wrench BY THE GRIP ONLY*, apply SLOW

AND STEADY pull until a momentary release impulse or

‘click’ is felt. Release tightening pressure immediately

when the release is felt.

WARNING: At low torque settings the release is gentle and

there usually is no audible ‘click’ signal. Learn how the

release feels BEFORE you torque to avoid accidental

overtightening or damage.

*When using long sockets or extensions, the wrench may be

supported at the head (only at the head) with only negligible

effects on accuracy.

5. The wrench resets automatically and is ready for the next

operation.

Adjusting

Knob

Plastic Handle

Battery Cover

Chrome Plated

Hardened steel housing

LCD Display

Dust Seal

Drive

Ratchet Reversing Lever

Fine-Tooth Ratchet Drive Head

Power ON/OFF

Button (Red)

Unit Change

Button (Green)

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Summary

Safety Rules

General Safety Precautions

Covers studying the manual, max scale, not using as nutbreaker, proper footing, and avoiding operating machinery.

Usage Restrictions and Warnings

Covers over-torquing, using grip only, no cheater bars, and no user-serviceable components.

Operating Instructions

To Set Torque

Step-by-step guide on how to set the desired torque value using the adjusting knob and buttons.

To Apply Torque

Instructions for applying torque to a fastener, including grip and release feel guidance.

Extensions and Calibration

Extension Calibration Formulas

Formulas to calculate correct torque settings when using attachments or extensions.

Care and Maintenance

General Care and Storage

Guidance on handling, storage, cleaning, and battery replacement for the torque wrench.

Accuracy Checks and Serviceability

Information on periodic accuracy checks and the non-serviceable nature of the wrench.

Specifications and Certification

Technical Specifications

Details on operating temperature, model, drive, capacity, dimensions, weight, and lever length.

Factory Calibration and Warranty

Information on factory calibration accuracy and the lifetime warranty policy.

The Husky 3/8 in. Drive Digital Display Click Style Torque Wrench (Model No: H3DTWDIG) is a precision instrument designed for the manual tightening of threaded fasteners. It features a fine-tooth ratchet drive head with a reversing lever, a chrome-plated hardened steel housing, and a plastic handle. The wrench incorporates a digital LCD display for showing torque settings and units, a red Power ON/OFF button, a green Unit Change button, and an adjusting knob for setting torque values.

Function Description:

This torque wrench allows users to set a specific target torque value digitally. When applying torque, the wrench provides a momentary release impulse or an audible "click" signal once the target torque is reached. This helps prevent over-tightening and ensures fasteners are tightened to the correct specification. The LCD display shows the current torque setting and units, and a battery level indicator shows remaining battery life. The wrench is designed for clockwise (right-hand) operation to actuate the click mechanism; it will not actuate or 'click' when used in the counter-clockwise or left-hand direction. It has an automatic shut-off feature that powers down after 10 minutes of non-use to conserve battery life. The target torque setting and units are saved after shut-off.

Important Technical Specifications:

Drive: 3/8" Ratchet
Calibrated Capacity:
- 5-80 ft-lbs
- 60-960 in-lbs
- 6.78-108.48 N-m
- 69.1-1106.0 kg-cm
Increments & Display Resolution:
- 0.1 ft-lbs
- 1.2 in-lbs
- 0.135 N-m
- 1.4 kg-cm
Operating Temperature Range: 40°F - 110°F (5°C - 42°C)
Dimensions: 18" x 1.57" x 2.16"
Weight: 3.2 lbs.
Lever Length (Center of drive to center of handle): 18.0"
Accuracy: ±4% on clockwise or right-hand readings greater than or equal to 20% of capacity. Complies with ASME standard B107.300-2010(B107.14) and International Standard ISO 6789.
Batteries: Two (2) 1.5V (LR44 or equivalent) batteries.
Warranty: Lifetime Warranty.

Usage Features:

Power On/Off: Press the red PWR button to turn the wrench on. Press and hold the red PWR button for 2 seconds to turn it off.
Unit Change: Press the green UNIT button to toggle through desired units (ft-lb, in-lb, N-m, kg-cm).
Backlight: To turn the LED backlight on or off, press and hold the green button for 2 seconds.
Torque Setting: Pull the adjusting knob out to unlock the mechanism. Turn it clockwise to increase torque and counter-clockwise to decrease torque. The LCD display shows the target torque reading. After setting, release and push the knob in to lock the setting.
Adjustment Precaution: If the target value is exceeded during adjustment, first adjust back below the target, then back up to the intended value. Avoid turning the adjusting knob beyond the lowest or highest calibrated scale readings, as these values are for adjustment purposes only and not within the calibrated range.
Applying Torque: Attach the proper socket, set the reversing lever, and place the socket onto the fastener. Apply a slow and steady pull to the grip until a release impulse or 'click' is felt, then immediately release pressure.
Extensions: When using special attachments that change the effective length of the wrench, the torque setting must be corrected using specific formulas:
- T(W) = T(E) * (L / (L + E))
- T(E) = T(W) * ((L + E) / L)
- Where E is the effective length of the extension, L is the lever length of the wrench, T(W) is the torque setting on the wrench, and T(E) is the effective torque applied. Regular socket extensions that extend directly under the drive head along the axis of rotation do not affect calibration.
Safety: Never apply more torque than the maximum scale reading. Do not use as a nut-breaker or pry bar. Be aware that at low torque settings, the release may be gentle with no audible 'click'.

Maintenance Features:

Storage: Store the wrench in its protective case when not in use. Keep it set below 25% of its maximum capacity. If left set to over 50% capacity for more than 1-2 hours, set it to the lowest setting for 3-5 minutes before using again.
Lubrication: The wrench is lubricated for life with a special lubricant and should not be oiled. The ratchet head can be lubricated as needed.
Cleaning: The rubberized grip is not affected by petroleum products but can be damaged by Acetone or certain industrial solvents. Clean with a cloth wetted in mineral spirits or denatured alcohol. Never immerse the wrench or any portion of it in any liquid.
Battery Replacement: Remove the screw on the battery cover (located to the left of the LCD), then place two 1.5V (LR44 or equivalent) batteries with the positive (flat) side facing the user. Replace the cover and tighten the screw. Remove batteries when storing for extended periods.
Accuracy Check: Periodically check the wrench for accuracy, especially if used frequently, subjected to abnormal handling, or stored improperly. For assembly line usage, it should be checked every 5,000 torque applications.
Serviceability: With the exception of the ratchet mechanism, the wrench is not user-serviceable. Disassembling the wrench or making adjustments will void the warranty.