Atlas Copco QMT21-25-HM4 Instruction sheet

QMT21-25-HM4
Printed Matter No. 9839 1667 01 Electric screwdriver
Publication Date 2021-03-18
Valid from Serial No. A1550001
Valid to Serial No. B3409999 Product Instructions
QMT21-25-HM4 ( 5–25 cNm) 8432084325
Fixtured transducerized
WARNING
Read all safety warnings and instructions
Failure to follow the safety warnings and instructions may result in
electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference

2© Atlas Copco Industrial Technique AB - 9839 1667 01
Table of Contents
Product Information................................................................................................3
General Information ..........................................................................................3
Safety signal words ...............................................................................3
Warranty ................................................................................................3
ServAid ..................................................................................................3
Website..................................................................................................4
Safety Data Sheets MSDS/SDS............................................................4
Country of Origin ...................................................................................4
Dimensional Drawings...........................................................................4
Overview...........................................................................................................4
Applications ...........................................................................................4
Technical Product Data .........................................................................4
Bit run out test .......................................................................................4
Bit grounding test...................................................................................5
Service Overview..............................................................................................5
Service recommendations .....................................................................5
Preventive maintenance ........................................................................5
Installation ...............................................................................................................7
Installation Instructions .....................................................................................7
Mechanical installation ..........................................................................7
Mounting bit ...........................................................................................7
Electrical installation ..............................................................................8
Operation .................................................................................................................9
Ergonomic guidelines .......................................................................................9
Operating Instructions.......................................................................................9
Front Light .............................................................................................9
Spring Tension ....................................................................................10
Service ...................................................................................................................11
Preventing ESD problems ..............................................................................11
Maintenance Instructions................................................................................11
Service recommendations ...................................................................11
Preventive maintenance ......................................................................11
Service Equipment ..............................................................................11
Recycling ...............................................................................................................12
Environmental Regulations.............................................................................12
Recycling information .....................................................................................12

QMT21-25-HM4 EN Product Information
© Atlas Copco Industrial Technique AB - 9839 1667 01 3
Product Information
General Information
WARNING Risk of Property Damage or Severe Injury
Ensure that you read, understand and follow all instructions before operating the tool. Failure to follow
all the instructions may result in electric shock, fire, property damage and/or severe bodily injury.
►Read all Safety Information delivered together with the different parts of the system.
►Read all Product Instructions for installation, operation and maintenance of the different parts of
the system.
►Read all locally legislated safety regulations regarding the system and parts thereof.
►Save all Safety Information and instructions for future reference.
Safety signal words
The safety signal words Danger, Warning, Caution, and Notice have the following meanings:
DANGER DANGER indicates a hazardous situation which, if not avoided, will result in death or se-
rious injury.
WARNING WARNING indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if
not avoided, could result in minor or moderate injury.
NOTICE NOTICE is used to address practices not related to personal injury.
Warranty
■Product warranty will expire 12 months after the product is first taken into use, but will in any case ex-
pire at the latest 13 months after delivery.
■Normal wear and tear on parts is not included within the warranty.
■Normal wear and tear is that which requires a part change or other adjustment/overhaul during
standard tools maintenance typical for that period (expressed in time, operation hours or other-
wise).
■The product warranty relies on the correct use, maintenance, and repair of the tool and its component
parts.
■Damage to parts that occurs as a result of inadequate maintenance or performed by parties other
than Atlas Copco or their Certified Service Partners during the warranty period is not covered by the
warranty.
■To avoid damage or destruction of tool parts, service the tool according to the recommended mainte-
nance schedules and follow the correct instructions.
■Warranty repairs are only performed in Atlas Copco workshops or by Certified Service Partners.
Atlas Copco offers extended warranty and state of the art preventive maintenance through its ToolCover
contracts. For further information contact your local Service representative.
For electrical motors:
■Warranty will only apply when the electric motor has not been opened.
ServAid
ServAid is a portal that is continuously updated and contains Technical Information, such as:
■Regulatory and Safety Information
■Technical Data

Product Information EN QMT21-25-HM4
4© Atlas Copco Industrial Technique AB - 9839 1667 01
■Installation, Operation and Service Instructions
■Spare Parts Lists
■Accessories
■Dimensional Drawings
Please visit: https://servaid.atlascopco.com.
For further Technical Information, please contact your local Atlas Copco representative.
Website
Information concerning our Products, Accessories, Spare Parts and Published Matters can be found on
the Atlas Copco website.
Please visit: www.atlascopco.com.
Safety Data Sheets MSDS/SDS
The Safety Data Sheets describe the chemical products sold by Atlas Copco.
Please consult the Atlas Copco website for more information www.atlascopco.com/sds.
Country of Origin
For the Country of Origin, please refer to the information on the product label.
Dimensional Drawings
Dimensions Drawings can be found either in the Dimensional Drawings Archive, or on ServAid.
Please visit: http://webbox.atlascopco.com/webbox/dimdrw or https://servaid.atlascopco.com.
Overview
Applications
The MicroTorque screw fastening systems are ultra low-torque applications.
Technical Product Data
Technical Product Data can be found on either ServAid, or the Atlas Copco website.
Please visit: https://servaid.atlascopco.com or www.atlascopco.com.
Bit run out test
Bit run out is measured with the tool securely fastened in a test rig and with the tool running at no load
with a rotation speed of 200 rpm. Measuring point is at 44 mm (length of a standard bit) out on a special
bit 4216 2194 00. Bit run out limit is 0.15 mm.

QMT21-25-HM4 EN Product Information
© Atlas Copco Industrial Technique AB - 9839 1667 01 5
Bit grounding test
Bit grounding is measured by the ground circuit stability and resistance with the tool running at no load
with a rotation speed of 200 rpm. Resistance is measured between the special bit 4216 2194 00 and the
outside of the tool connector and the resistance limit is 20 Ω.
Service Overview
Service recommendations
Preventive maintenance is recommended at regular intervals. See the detailed information on preventive
maintenance. If the product is not working properly, take it out of service and inspect it.
If no detailed information about preventive maintenance is included, follow these general guidelines:
■Clean appropriate parts accurately
■Replace any defective or worn parts
Preventive maintenance
Recommended interval between actions:
Valid at normal usage of the tool at a load up to 70% of maximum torque.
Service should only be carried out by trained technician following provided service instructions and
using original Atlas Copco spare parts.

Product Information EN QMT21-25-HM4
6© Atlas Copco Industrial Technique AB - 9839 1667 01
Interval Action
1.500.000 cycles or 1 year Calibrate the tool
1.500.000 cycles Exchange bit grounding
3.000.000 cycles Exchange front part
3.000.000 cycles Exchange motor

QMT21-25-HM4 EN Installation
© Atlas Copco Industrial Technique AB - 9839 1667 01 7
Installation
Installation Instructions
Mechanical installation
Attach the tool to the fixture in one of the following ways:
A: Using the threads at the front part, accessible under the thread protection ring.
B: Using the holes of the tool base.
Four holes are intended for screws and two holes are intended for guide pins.
Mounting bit

Installation EN QMT21-25-HM4
8© Atlas Copco Industrial Technique AB - 9839 1667 01
1. Pull the chuck ring outwards
2. Insert the bit
3. Turn the bit, if not seated properly
Electrical installation
Connect the tool to the drive using the supplied cable.
NOTICE Make sure the cable is not bent more than a radious of 55 mm (2.2 in).

QMT21-25-HM4 EN Operation
© Atlas Copco Industrial Technique AB - 9839 1667 01 9
Operation
Ergonomic guidelines
Consider your workstation as you read through this list of general ergonomic guidelines and see if you can
identify areas for improvement in posture, component placement, or work environment.
■Take frequent breaks and change work positions frequently.
■Adapt the workstation area to your needs and the work task.
■Adjust for convenient reach range by determining where parts or tools should be located to avoid
static load.
■Use workstation equipment such as tables and chairs appropriate for the work task.
■Avoid work positions above shoulder level or with static holding during assembly operations.
■When working above shoulder level, reduce the load on the static muscles by reducing the weight
of the tool, using for example torque arms, hose reels or weight balancers. You can also reduce
the load on the static muscles by holding the tool close to the body.
■Make sure to take frequent breaks.
■Avoid extreme arm or wrist postures, particularly for operations requiring a degree of force.
■Adjust for convenient field of vision by minimizing movement of the eyes and head during the work
task.
■Use the appropriate lighting for the work task.
■Select the appropriate tool for the work task.
■Use ear protection equipment in noisy environments.
■Use high-quality inserted tools or consumables to minimize exposure to excessive levels of vibration.
■Minimize exposure to reaction forces.
■When cutting:
A cut-off wheel can get stuck if the wheel is either bent or if it is not guided properly. Make sure to
use the correct flanges for cut-off wheels and avoid bending the wheel during cut-off operation.
■When drilling:
The drill might stall when the drill bit breaks through. Makes sure you use support handles if the
stall torque is too high. The safety standard ISO11148 part 3 recommends using something to ab-
sorb the reaction torque above 10 Nm for pistol grip tools and 4 Nm for straight tools.
■When using direct-driven screw or nutrunners:
Reaction forces depend on tool setting and joint characteristics. The ability to bear reaction forces
depends on the operator’s strength and posture. Adapt the torque setting to the operator's strength
and posture and use a torque arm or reaction bar if the torque is too high.
■Use dust extraction system or mouth protection mask in dusty environments.
Operating Instructions
Front Light
■Yellow = Busy
■Red = Tightening not OK
■Green = Tightening OK
■Blue = Batch OK

Operation EN QMT21-25-HM4
10 © Atlas Copco Industrial Technique AB - 9839 1667 01
Spring Tension
Length (L) 5 mm
Spring tension at full compression (A) 20 N
Spring tension at start position (B) 13 N

QMT21-25-HM4 EN Service
© Atlas Copco Industrial Technique AB - 9839 1667 01 11
Service
Preventing ESD problems
The components inside the tool and controller are sensitive to electrostatic discharge. To avoid future mal-
function, make sure that service and maintenance is carried out in an ESD approved work environment.
The figure below shows an example of an appropriate service work station.
Maintenance Instructions
Service recommendations
Preventive maintenance is recommended at regular intervals. See the detailed information on preventive
maintenance. If the product is not working properly, take it out of service and inspect it.
If no detailed information about preventive maintenance is included, follow these general guidelines:
■Clean appropriate parts accurately
■Replace any defective or worn parts
Preventive maintenance
Recommended interval between actions:
Valid at normal usage of the tool at a load up to 70% of maximum torque.
Service should only be carried out by trained technician following provided service instructions and
using original Atlas Copco spare parts.
Interval Action
1.500.000 cycles or 1 year Calibrate the tool
1.500.000 cycles Exchange bit grounding
3.000.000 cycles Exchange front part
3.000.000 cycles Exchange motor
Service Equipment
■Normal workshop equipment.
■Necessary special equipment as shown in the exploded views/tables.
■For testing a calibration rig is recommended.
■PC with internet connection to be able to download necessary keys.

Recycling EN QMT21-25-HM4
12 © Atlas Copco Industrial Technique AB - 9839 1667 01
Recycling
Environmental Regulations
When a product has served its purpose it has to be recycled properly. Dismantle the product and recycle
the components in accordance with local legislation.
Batteries shall be taken care of by your national battery recovery organization.
Recycling information
Part Recycle as
1 Front protection Plastics, other, PA
2 Cap nut Metal, steel
3 Front part Metal, steel
4 Grounding ring Metal, copper/tin alloy
5 Spring ring Metal, steel
6 Cap nut Metal, steel
7 Cover ring Plastics, other, TPU
8 Main board Electronic
9 Cap nut Metal, steel
10 Motor Electronic
11 Motor cover Metal, aluminum
12 Drive unit without motor Recycle as steel
13 Light electronics Electronic

QMT21-25-HM4 EN Recycling
© Atlas Copco Industrial Technique AB - 9839 1667 01 13
14 Lens Plastics, other, PC
15 Light module housing Metal, aluminum
16 Reflector Plastics, other, POM
17 Part of light electronics Electronic
18 Cover plate Metal, stainless steel
19 Screws Metal, stainless steel
20 Housing frame Metal, aluminum
21 Screws Metal, steel

Original instructions
Atlas Copco Industrial
Technique AB
SE-10523 STOCKHOLM
Sweden
Telephone: [phone]
www.atlascopco.com
© Copyright 2021, Atlas Copco Industrial Technique AB. All rights reserved.
Any unauthorized use or copying of the contents or part thereof is prohibited.
This applies in particular to trademarks, model denominations, part numbers
and drawings. Use only authorized parts. Any damage or malfunction caused
by the use of unauthorized parts is not covered by Warranty or Product
Liability.
Out of respect to wildlife and nature, our technical literature is printed on
environmentally friendly paper.