Markusson RJ12 User manual

Owner’s manual
1. Original Instruction Manual RJ12 Chain Grinder........................................ 2
2. Original-Gebrauchsanleitung RJ12 Chain Grinder................................... 36
3. Manual original de instrucciones Afiladora para cadenas RJ12............... 70
4. Manuel d’instructions d’origine Affûteuse de chaînes RJ12................... 104
5. Traduzione del manuale di istruzioni RJ12 Chain Grinder..................... 138

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Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . 3
1.1 Important user information . . . . . . . . . . 3
1.2 About this manual. . . . . . . . . . . . . . .3
1.3 Intended use . . . . . . . . . . . . . . . . . 3
1.4 Regulatory information . . . . . . . . . . . . 3
1.5 Nameplate . . . . . . . . . . . . . . . . . . 4
1.6 Recycling information . . . . . . . . . . . . .4
2 Safety. . . . . . . . . . . . . . . . . . . . 5
2.1 Safety notices . . . . . . . . . . . . . . . . .5
2.2 Safety instructions . . . . . . . . . . . . . . 5
2.2.1 Work area safety. . . . . . . . . . . .5
2.2.2 Electrical safety . . . . . . . . . . . . 5
2.2.3 Personal safety . . . . . . . . . . . . 6
2.2.4 Power tool use and care. . . . . . . .6
2.2.5 Service. . . . . . . . . . . . . . . . .7
2.3 Signs and symbols . . . . . . . . . . . . . . 7
3 Product Description. . . . . . . . . . . . . 9
3.1 Product overview . . . . . . . . . . . . . . . 9
3.2 Front view . . . . . . . . . . . . . . . . . . .9
3.3 Back view . . . . . . . . . . . . . . . . . . 10
3.4 Grinding head . . . . . . . . . . . . . . . 11
3.5 Controls . . . . . . . . . . . . . . . . . . . 12
3.6 Chain overview . . . . . . . . . . . . . . . 13
3.7 Technical data. . . . . . . . . . . . . . . . 13
4 Installation . . . . . . . . . . . . . . . . . 14
4.1 Safety during installation . . . . . . . . . . 14
4.2 Site requirements . . . . . . . . . . . . . . 14
4.3 Unpack the machine . . . . . . . . . . . . 14
4.4 Bench-mount the machine . . . . . . . . . 15
4.5 Install and center the grinding wheel . . . . 15
4.6 Test the machine before first use . . . . . . 16
5 Operation . . . . . . . . . . . . . . . . . .17
5.1 Safety during operation . . . . . . . . . . . 17
5.2 Prepare for operation . . . . . . . . . . . . 17
5.2.1 Prepare the grinding wheel . . . . . 17
5.2.2 Set the head-tilt angle . . . . . . . . 18
5.2.3 Set the top-plate angle. . . . . . . . 18
5.2.4 Insert the chain . . . . . . . . . . . 19
5.2.5 Set the chain pusher. . . . . . . . . 19
5.2.6 Set the grinding depth . . . . . . . . 20
© 2022 Markusson Professional Grinders AB - All rights reserved.
5.2.7 Set the cutter top plate to
equal lengths . . . . . . . . . . . . 21
5.2.8 Center the grinding disc . . . . . . . 21
5.2.9 Set the grinding length. . . . . . . . 21
5.2.10 Test the grinding settings . . . . . . 22
5.3 Operate the machine . . . . . . . . . . . . 22
5.4 Depth gauge grinding . . . . . . . . . . . . 24
6 Maintenance and Service. . . . . . . . . .26
6.1 Safety during maintenance . . . . . . . . . 26
6.2 Frequency of maintenance . . . . . . . . . 26
6.3 Change the grinding wheel
and fit the grinding wheel guard . . . . . . 27
6.4 Fasten the chain lock . . . . . . . . . . . . 27
6.5 Check and adjust the wire . . . . . . . . . 28
6.6 Service . . . . . . . . . . . . . . . . . . . 29
7 Troubleshooting. . . . . . . . . . . . . . .30
7.1 Troubleshooting procedure . . . . . . . . . 30
7.2 Sharpening test . . . . . . . . . . . . . . . 30
7.3 Issues . . . . . . . . . . . . . . . . . . . . 31
8 Accessories and Spare Parts. . . . . . . .32
8.1 Ordering information . . . . . . . . . . . . 32
8.2 List of accessories. . . . . . . . . . . . . . 32
8.3 Spare parts . . . . . . . . . . . . . . . . . 33
9 Declaration of conformity . . . . . . . . . .35

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Introduction
1 Introduction
1.1 Important user information
WARNING Before you install, operate or do maintenance on the machine, you must read the safety information
in this manual. Obey the instructions in this manual to prevent injuries or damage to the equipment.
1.2 About this manual
This user manual describes how to safely install, operate, and perform basic maintenance on the product. This
manual also describes the parts of the machine, and it shows different accessories and spare parts that are
available.
1.3 Intended use
The machine must only be used to sharpen the cutting chains used on power saws and forestry machines. It
automatically sharpens the cutting teeth, and depth gauges on 3/8”, 3/8” low profile, 325” and 1/4” pitch chains. The
machine is designed for indoor use only.
Unintended use
The machine must not be used outdoors or in a manner that is not described in this manual.
1.4 Regulatory information
Regulations are given below. A copy of the EC Declaration of conformity is supplied with the machine.
WARNING Before you install, operate or do maintenance on the machine, you must read the safety information
in this manual. Obey the instructions in this manual to prevent injuries or damage to the equipment.
Directive/standard Description
2006/42/EC The Machinery Directive (MD)
2014/35/EU The Low-Voltage Directive (LVD)
2014/30/EU The Electro Magnetic Compatibility Directive (EMC)
EN-ISO:12100:2010 Safety of machinery - Basic components, general principles for design
EN 60204-1:2006 Safety of machinery - Electrical equipment of machines - Part 1: General
requirements
EN 61000-6-3:2007 Emission standard for residential, commercial and light-industrial
environments
EN 55014-1:2017,
EN 55014-2: 2015
Electromagnetic compatibility - Requirements for household
appliances, electric tools and similar apparatus
- Part 1: Emission
- Part 2: Immunity

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Introduction
1.5 Nameplate
This nameplate is placed on the Product.
1.6 Recycling information
This symbol shows that electrical and electronic equipment must not be disposed of as unsorted municipal waste.
It must be collected separately. Recycle according to current local rules and regulations.

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Safety
2 Safety
2.1 Safety notices
This section contains safety information for the power tool. This manual contains WARNINGS, CAUTIONS and
IMPORTANT notes that are applicable for the safe operation of the power tool.
WARNING A warning tells you about conditions that can cause injury or death, if you do not obey the
instructions. Do not continue until all conditions are accepted and engaged.
CAUTION A caution tells you about conditions that can cause damage to equipment, if you do not obey the
instructions. Do not continue until all conditions are accepted and engaged.
IMPORTANT Important or noteworthy information that enables trouble-free and optimal use of the power tool.
2.2 Safety instructions
WARNING Read all safety warnings, instructions, illustrations, and specifications provided with this power tool.
Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury. Save all warnings
and instructions for future reference. The term”power tool” in the warnings refers to your mains-operated (corded)
power tool or battery-operated (cordless) power tool.
WARNING Before you install, operate or do maintenance on the power tool, you must read the safety
information in this manual. Obey the instructions in this manual to prevent injuries or damage to the equipment.
2.2.1 Work area safety
WARNING Keep work area clean and well lit. Cluttered or dark areas invite accidents.
WARNING Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids,
gases or dust. Power tools create sparks which may ignite the dust or fumes.
WARNING Keep children and bystanders away while operating a power tool. Distractions can cause you to lose
control.
WARNING Put the power tool in a dry indoor area with good lighting. Do not let the power tool become wet or
damp. Do not put the power tool near gas, liquids or other flammable materials.
WARNING The power tool must always be fixed to the floor. Make sure that it is safely attached.
WARNING Attach air hoses and cables with cable clamps, to make sure no one trips over them.
CAUTION Make sure that the floor where the power tool is placed is flat and level. When used with a stand,
attach the stand to the floor with screws.
2.2.2 Electrical safety
WARNING Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter
plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
WARNING Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
WARNING Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the
risk of electric shock.
WARNING Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep
cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric
shock.
WARNING When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a
cord suitable for outdoor use reduces the risk of electric shock.
WARNING If operating a power tool in a damp location is unavoidable, use a residual current device (RCD)
protected supply. Use of an RCD reduces the risk of electric shock.

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Safety
NOTE The term “residual current device (RCD)” can be replaced by the term “ground fault circuit
interrupter (GFCI)” or “earth leakage circuit breaker (ELCB).”
WARNING Place the power converter where there is as little dust as possible and out of reach of sparks from
the power tool.
CAUTION It is recommended that the tool is always supplied via a residual current device having a rated
residual current of 30 mA or less.
2.2.3 Personal safety
WARNING Stay alert, watch what you are doing and use common sense when operating a power tool. Do not
use a power tool while under the influence of drugs, alcohol or medication. A moment of inattention while operating
power tools may result in serious personal injury.
WARNING Use personal protective equipment. Always wear eye protection. Protective equipment such as a
dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will reduce personal
injuries.
WARNING Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a power
source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or
energising power tools that have the switch on invites accidents.
WARNING Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left
attached to a rotating part of the power tool may result in personal injury.
WARNING Do not overreach. Keep proper footing and balance at all times. This enables better control of the
power tool in unexpected situations.
WARNING Dress properly. Do not wear loose clothing or jewellery. Keep your hair and clothing away from
moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
WARNING If devices are provided for the connection of dust extraction and collection facilities, ensure these
are connected and properly used. Use of dust collection can reduce dust-related hazards.
WARNING Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore
tool safety principles. A careless action can cause severe injury within a fraction of a second.
WARNING Always wear safety gloves, protective glasses, and any other personal protective equipment
suitable for your task.
WARNING Be careful around moving parts – risk of squeezing.
WARNING Make sure the machine has stopped moving before you put your hands into the machine.
WARNING Make sure that the power is turned off before you install, operate or do maintenance on the power tool.
WARNING To prevent mistakes when chains are sharpened, it is very important to understand how the chain
grinder works. Read the instructions carefully before operating the power tool.
2.2.4 Power tool use and care
WARNING Do not force the power tool. Use the correct power tool for your application. The correct power tool
will do the job better and safer at the rate for which it was designed.
WARNING Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be
controlled with the switch is dangerous and must be repaired.
WARNING Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the
power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety
measures reduce the risk of starting the power tool accidentally.
WARNING Store idle power tools out of the reach of children and do not allow persons unfamiliar with the
power tools or these instructions to operate the power tool. Power tool are dangerous in the hands of untrained
users.

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Safety
WARNING Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage
of parts and other condition that may affect the power tool’s operation. If damaged, have the power tool repaired
before use. Many accidents are caused by poorly maintained power tools.
WARNING Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are
less likely to bind and are easier to control.
WARNING Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into
account the working conditions and the work to be performed. Use of the power tool for operations different from
those intended could result in a hazardous situation.
WARNING Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and
grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.
WARNING Before a chain is sharpened, make sure that the the grinding disc is not cracked, does not vibrate
or wobble. If the grinding disc is damaged it must be replaced immediately, see chapter 6.3. “Change the grinding
disc and fit the grinding disc guard”. You can also do a simple “ring test” to check for damage; see 4.7, “Installing
the grinding wheel.” If abnormal vibrations occur during operation, immediately stop the machine and check the
condition of the grinding wheel.
WARNING The supply cord can only be replaced by the manufacturer, or approved and trained service
technicians in order to avoid a safety hazard.
WARNING Stop the power tool immediately if it does not work correctly.
CAUTION Only use accessories that are supplied or approved by the manufacturer.
CAUTION If the pitch is not correctly set the chain will be pushed into an incorrect sharpening position. This
may result in a damaged chain.
CAUTION If the metal of a cutting link turns blue during grinding, the speed is set too high and the metal is
overheated. This can cause the metal in the cutting tooth to lose its properties. Replace the damaged cutting link or
sharpen the chain again.
CAUTION Grinding dust can interfere with the power tool’s operation. Clean the power tool daily to remove all
of the grinding dust. Use a vacuum cleaner, brush or similar to clean the power tool.
2.2.5 Service
WARNING Have your power tool serviced by a qualified repair person using only identical replacement parts.
This will ensure that the safety of the power tool is maintained.
WARNING The user must only perform maintenance that is described in this manual. Only approved and
trained service technicians can service the power tool.
2.3 Signs and symbols
See the table below for information about the signs and symbols on the product.
Sign/Symbol Description
Warning! A warning tells you about conditions that can cause injury or death, if you do not obey the
instructions. Do not continue until all conditions are accepted and engaged.
Risk for cutting injuries. Keep fingers away from the area when the machine is on.
Risk for pinching injuries. Keep fingers away from the area when the machine is on.

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Safety
Sign/Symbol Description
Before you install, operate or do maintenance on the machine, you must read the safety information
in the User manual. Obey the instructions to prevent injuries or damage to the equipment.
Always wear protective gloves when using the machine.
Always wear protective glasses and ear protection when using the machine.

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Product Description
3 Product Description
3.1 Product overview
The RJ12 Chain Grinder is a machine that sharpens chains. The machine can sharpen chains (3/8”, 3/8” Low Profile,
325” and 1/4” pitch) for power saws and forestry machines.
3.2 Front view
A
E
B
G
C
F
D
L
HIJ
K
M
Pos Part Description
AGrinding head Holds the grinding wheel in its correct position.
BGrinding depth knob Sets the grinding depth for the gullets.
CHead-tilt angle scale Shows the head-tilt angle on a scale from 50-90°.
Default: 60°.
DChain pusher adjustment knob Sets the grinding length.
EPitch adjustment wing. Adjusts the pitch.
FPower supply cable Supplies electricity to the machine.
GControl panel The controls starts and stops the different functions of the machine.
See section 3.6, “Controls” for further information.
HChain pusher Advances the chain through the vise
IChain vise Positions the chain as it moves in the machine.
JTop-plate angle knob Sets the top-plate angle, 0-35°. Default 30°.
KLeft-right alignment screw Sets the right and left cutters to equal length.
LGrinding wheel The wheel that sharpens the chain.
MGrinding wheel centering knob Centers the grinding wheel above the chain.

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Product Description
3.3 Back view
N
O
R
QP
Pos Part Description
NGrinding head cover and grinding
wheel guard.
Protects the grinding head and grinding wheel; it also protects the
user from sparks during grinding.
OTop-plate angle scale Shows the top-plate angle on a scale from 0-35°. Default: 30°. It is
set using the top-plate angle screw.
PWire Controls the vertical movement of the grinding head. ets the head-
tilt angle on the head-tilt angle scale.
QWire adjustment knobs Adjusts the wire that controls the vertical movement of the grinding
head.
RHead-tilt angle nut Sets the head-tilt angle on the head-tilt angle scale.