Sealey AK624B - User Manual

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INSTRUCTIONS FOR

MICROMETER TORQUE WRENCH

1/2” SQ. DRIVE BLACK SERIES

MODEL NO: AK624B

Thank you for purchasing a Sealey product. Manufactured to a high standard, this product will, if used according to these instructions,

and properly maintained, give you years of trouble free performance.

IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE

THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR

PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.

1. SAFETY

99 9 Ensure all workshop safety rules, regulations, and conditions are complied with when using torque wrench.

99 99 Maintain the wrench in good condition and replace any damaged or worn parts. Use genuine parts only. Non-authorised parts

may be dangerous and will invalidate the warranty.

99 99 The wrench is a precision tool, DO NOT abuse it.

99 99 Maintain correct balance and footing. Ensure the floor is not slippery and wear non-slip shoes.

99 99 Keep children and unauthorised persons away from the working area.



WARNING! DO NOT use the wrench if damaged or thought to be faulty. (Contact Service Agent).

9 DO NOT drop or throw the wrench.

98 9 DO NOT use wrench unless you have been instructed in its use by a qualified person.

98 99 DO NOT use any cleaner which might affect the high pressure grease with which the wrench it is packed.

After use adjust to lowest torque setting (but not below),clean and store in a safe, dry, childproof location.

2. INTRODUCTION

Heat treated steel ratchet head. Fully hardened and tempered. Electrodeposition nish for corrosion resistance. Calibration tolerance in

accordance with BS EN ISO 6789:2003. Every wrench is tested and supplied with an individually numbered test certicate. Micrometer type

torque range adjustment with scale graduated in both Nm and lb.ft. ip reverse ratchet mechanism. Supplied in storage case.

3. SPECIFICATION

Model no: .................................................................. AK624B

Drive: .......................................................................... 1/2”sq.

Length: ....................................................................... 465mm

Range: .............................................. 27-204Nm (20-150lb.ft)

4. OPERATION

4.1. Hold torque wrench in one hand so that required scale (lb.ft or Nm) is uppermost and visible.

4.2. Turn knurled lock screw at end of handle anticlockwise to unlock knurled adjusting grip.

4.3. Turn adjusting grip to select torque setting as follows:

• Required setting - 56lb.ft

• Turn grip until top edge of grip is level with the 50lb.ft line on the handle scale and the zero graduation on the grip is aligned

with the centre line of the handle scale.

• Rotate the handle further, clockwise, until the ‘6’ graduation on the grip is aligned with the centre line to give a setting of

50 + 6 = 56lb.ft.

Note: If using the Nm scale then each division on the grip graduation is equivalent to 1.36Nm.

Therefore to set wrench at 100Nm:

• Turn grip until top edge of grip is level with the 94.9Nm line on the handle scale and the zero graduation on the grip is aligned with the

centre line of the handle scale.

• Rotate the handle further, clockwise, until the ‘4’ graduation on the grip is aligned with the centre line to give a setting of

94.9 + (4 x 1.36) = 94.9 + 5.44 =100.34Nm.

4.4. Tighten the knurled lock screw at the end of the handle to prevent accidental alteration of the setting.

4.5. When tightening the nut/bolt you will feel and hear the wrench mechanism click when the set torque is reached. Immediately stop

applying force to the wrench to avoid over tightening the nut/bolt. The torque wrench will reset ready for the next application.

Note: If the torque wrench has not been used for some time, operate it a few times, at a low setting, to ensure all internal parts are

coated in grease.

5. RECALIBRATIONr

5.1. In order to ensure continued accuracy, the torque wrench should be recalibrated annually and after any impact or other misuse. Contact a

NAMAS accredited laboratory.

Refer to

instruction

manual

AK624B| Issue 1 12/12/16

Original Language Version

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Summary

Safety Instructions

General Safety Compliance

Ensure adherence to workshop safety rules, maintain the wrench, and use genuine parts. Avoid non-authorised parts.

Critical Warnings

Do not use if damaged, avoid dropping, use only after instruction, and refrain from using specific cleaners.

Introduction to the Torque Wrench

Operation Guide

Torque Setting Procedure

Hold wrench, unlock grip, turn grip to select torque, and align scales on handle and grip.

Nm Scale Adjustment

Details on using the Nm scale, where each grip division equals 1.36Nm.

Securing Torque Setting

Tighten the knurled lock screw to prevent accidental changes to the selected torque setting.

Detecting Reached Torque

Stop applying force immediately when the wrench clicks to prevent over-tightening.

Maintenance for Unused Wrench

Operate wrench a few times at low setting if unused, then clean and store safely.

Recalibration Requirements

Recalibration Frequency

Recalibrate annually or after impact/misuse. Contact a NAMAS accredited laboratory.

Summary

Safety Instructions

General Safety Compliance

Ensure adherence to workshop safety rules, maintain the wrench, and use genuine parts. Avoid non-authorised parts.

Critical Warnings

Do not use if damaged, avoid dropping, use only after instruction, and refrain from using specific cleaners.

Introduction to the Torque Wrench

Operation Guide

Torque Setting Procedure

Hold wrench, unlock grip, turn grip to select torque, and align scales on handle and grip.

Nm Scale Adjustment

Details on using the Nm scale, where each grip division equals 1.36Nm.

Securing Torque Setting

Tighten the knurled lock screw to prevent accidental changes to the selected torque setting.

Detecting Reached Torque

Stop applying force immediately when the wrench clicks to prevent over-tightening.

Maintenance for Unused Wrench

Operate wrench a few times at low setting if unused, then clean and store safely.

Recalibration Requirements

Recalibration Frequency

Recalibrate annually or after impact/misuse. Contact a NAMAS accredited laboratory.

Overview

The Sealey Micrometer Torque Wrench, model AK624B, is a precision tool designed for accurately tightening nuts and bolts to a specified torque. Its primary function is to prevent over-tightening, which can damage fasteners or components, and under-tightening, which can lead to loose connections and potential failures. This wrench is suitable for a wide range of applications where precise torque control is critical, from automotive repair to general mechanical work.

The wrench features a heat-treated steel ratchet head, ensuring durability and resistance to wear. It is fully hardened and tempered, and boasts an electrodeposition finish for enhanced corrosion resistance, contributing to its longevity in various working environments. A key aspect of its design is its adherence to calibration tolerance in accordance with BS EN ISO 6789:2003, signifying its reliability and accuracy. Each wrench is individually tested and supplied with a numbered test certificate, providing assurance of its performance standards.

For ease of use, the AK624B incorporates a micrometer-type torque range adjustment. This allows users to precisely set the desired torque value using a clear scale graduated in both Newton meters (Nm) and pound-feet (lb.ft). The adjustment mechanism involves a knurled adjusting grip and a corresponding lock screw. To set the torque, the user first unlocks the knurled screw, then rotates the adjusting grip until the top edge aligns with the desired major torque line on the handle scale. Fine adjustments are made by further rotating the grip until the specific graduation on the grip aligns with the handle's center line. For instance, to set a value like 56 lb.ft, the user would align the grip with the 50 lb.ft line and then rotate it further to align the '6' graduation. When working with the Nm scale, each division on the grip graduation corresponds to 1.36 Nm, requiring a simple calculation for precise settings. Once the desired torque is set, the knurled lock screw is tightened to prevent accidental alteration during use.

The wrench operates with a flip-reverse ratchet mechanism, offering versatility for tightening in both clockwise and counter-clockwise directions, although torque measurement is typically performed in the tightening direction. During operation, as the user applies force to the wrench, a distinct "click" will be felt and heard when the preset torque value is reached. This audible and tactile feedback signals the user to immediately stop applying force, preventing over-tightening. The wrench then automatically resets, ready for the next application.

Safety is paramount when using this precision instrument. Users are advised to comply with all workshop safety rules and regulations. It is crucial to maintain the wrench in good condition, replacing any damaged or worn parts with genuine components to avoid potential hazards and maintain warranty validity. The wrench should be handled with care, as it is a precision tool and should not be abused, dropped, or thrown. Maintaining correct balance and footing during use, and ensuring the work area is free from slips, are also important safety considerations. Children and unauthorized persons should be kept away from the working area. A critical warning emphasizes not using the wrench if it is damaged or suspected to be faulty, and users should seek professional service if such issues arise. Furthermore, only qualified persons who have been instructed in its proper use should operate the wrench. After each use, the torque setting should be adjusted to its lowest point (but not below) to relieve spring tension, and the wrench should be cleaned and stored in a safe, dry, childproof location.

Regarding maintenance, the AK624B is designed for long-term performance. However, to ensure continued accuracy, annual recalibration is recommended. Additionally, if the wrench experiences any impact or other forms of misuse, it should be recalibrated by a NAMAS accredited laboratory. This ensures that the tool consistently delivers accurate torque readings over its lifespan. If the wrench has not been used for some time, it is advisable to operate it a few times at a low setting. This action helps to ensure that all internal parts are adequately coated in grease, maintaining smooth operation and preventing potential issues due to dried lubricants. The wrench is supplied in a storage case, which should be utilized to protect it from damage and environmental factors when not in use.