Bona Dual Edge Operating instructions

Operating and maintenance manual
Bona Dual Edge by
GEEN118

Bona Dual Edge Manual
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ATTENTION:
This manual contains important information on the safe use and operation
of this machine. Failure to read this manual before operating, adjusting or
servicing this machine could cause injury or damage to persons or objects.
Anybody operating the machine should understand how to use and operate
it before starting it up. Keep this manual for future reference.
This manual is an ENGLISH translation of the original version in Italian.
For a new manual contact:
Bona AB
Murmansgatan 130
P.O. Box 21074
SE-200 21 Malmö, Sweden
Tel [phone]
www.bona.com
Foreword

3
Table of Contents
Foreword 2
Table of Contents 3
Machine Symbols Key 4
Operator Safety 4
Storage 6
Transporting and Handling 7
With one person 7
Introduction 7
Safe and correct use 7
Machine data plate 8
Commencing Operation 8
Instructions for electrical connection 8
Cables, extensions and plugs 9
Removing sawdust generated during use 10
Prevention Measures for Users 10
Personal safety measures 10
Compliance with safety measures and warnings 10
Instructions on Correct Machine Use 12
Machine Control Instructions 13
Machine Specifications 14
Machine Warnings 15
Prohibited use 15
Starting the Machine 16
Machine Adjustment Procedures 18
Abrasive assembly procedures 18
Adjusting the working surface on the floor 18
Adjusting the belt tension 18
Routine Maintenance 19
Sawdust chamber (for the user) 19
Discs (for the user) 19
Spherical Wheel (for the user) 19
Dust bag (for the user) 20
Graphite brushes (for the user) 20
Lubrication (for the user) 21
Spare Parts 22
Rear Spherical Wheel: OMNICASTER™OC30 22
Choice and maintenance (for the user) 22
Emergency Situations (for the user) 23
Problem 23
Causes 23
Solutions 23
Declaration of Conformity 24
Disposal 25
Additional Notes 26

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Machine Symbols Key
HAZARD means: Serious injury or death may occur to the operator or others if 'HAZARD' warnings on the
machine or in this manual are ignored or not kept to. Read and follow all 'HAZARD' warnings on this machine
or in this manual.
WARNING means: Injury may occur to the operator or others if 'WARNING' notices on the machine or in this
manual are ignored or not kept to. Read and follow all 'WARNING' notices on this machine or in this manual.
CAUTION means: Damage may occur to the operator or others if 'CAUTION' alerts on the machine or in this
manual are ignored or not kept to. Read and follow all 'CAUTION' alerts on this machine or in this manual.
Operator Safety
Read the instructions
contained in this user
and maintenance manual
before using the machine.
Hearing protection during
use is recommended.
Protection of the airways
during use
is recommended.
Hazard due to
moving parts.
Hazard due
to electricity.
Failure to read the Bona Dual Edge machine manual before operating, adjusting or performing
maintenance operations on the machine could cause injury or damage to persons or objects.
Anyone operating the machine should understand how to use and operate it before starting it up.
KEEP AWAY FROM CHILDREN
Children should be supervised to ensure that they do not play with the appliance. This machine is not
intended for use by persons (including children) with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge unless they have received instructions regarding the use and are
supervised by a person responsible for their safety.

5
Operator Safety (Cont.)
Sanding/finishing wood floors can create an environment that can be explosive.
The following safety procedures must be adhered to:
• Cigarette lighters, pilot lights, and any other sources of ignition can create an explosion when active
during a sanding session. All sources of ignition should be extinguished or removed entirely, if possible,
from the work area.
• Work areas that are poorly ventilated can create an explosive environment when certain combustible
materials (solvents, thinners, alcohol, fuels, certain finishes, wood dust, etc.) are in the atmosphere.
Floor sanding machines can cause flammable material and vapors to ignite. Read the manufacturer’s label
on all chemicals being used to determine combustibility. Keep the work area well ventilated.
• Hitting a nail while sanding can cause sparks and create an explosion or fire. Always use a hammer and
punch to countersink all nails before sanding floors.
Electrocution could occur if the machine is used on a power circuit that repeatedly trips or is undersized.
Have a licensed electrician check the fuse, breaker, or power supply.
Electrocution could occur if maintenance and repairs are performed on a unit that is not properly
disconnected from the power source. Disconnect the machine from all power.
Electrocution could occur if the machine is used on an ungrounded electrical circuit. Never remove or
disable the grounding supply conductor on the electrical cord.
Consult an electrician if the grounding conductor is missing or if you suspect your circuit is not grounded
properly.
Use of this machine with a damaged power cord or plug could result in an electric shock. DO NOT pull
or carry by cord, use power cord as a handle, close a door on cord, or pull cord around sharp edges or
corners.
DO NOT unplug by pulling on cord. To unplug, grasp the plug, not the power cord. DO NOT handle plug or
operate machine with wet hands. DO NOT put any objects into motor openings.
Electrocution or injury could occur if the power cord is run over and damaged by the sanding machines.
Keep the cord away from contact with the sanding heads. Always lift the cord over the machine and sand
away from the cord.
Moving parts on this machine can cause serious injury and or damage. Keep hands, feet, hair, and loose
clothing away from all moving parts of the unit.
Operating the machine without all guards, doors, or covers in place can cause an injury or damage.
DO NOT pass with the machine on objects that are hot, burning or smoking, such as cigarettes, matches or
cinders.

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Bona Dual Edge Manual
This equipment is for dry use only and must not be used or kept outside in wet conditions. Store the machine
in a dry building, otherwise the machine could be damaged. Storage temperature
from -20°C to 50°C.
Operator Safety (Cont.)
Storage
It is advisable to store the machine in its original packaging. Doing so makes it possible to form a column of three packages maximum, with one
on top of the other.
Injury to the operator or bystanders could occur if the machine is plugged in while performing
maintenance, servicing, changing filter, or inspecting. Always unplug machine when not in use.
DO NOT use solvents or other flammable products to clean this machine.
Dry use only. DO NOT use for liquid recovery, which could result in motor failure, electric shock,
and electrocution.
Airborne sanding dust should not be breathed in while operating a sanding machine. Always wear an
approved particulate respirator while operating sanding equipment.
Injury to the eyes and or body can occur if protective clothing and or equipment is not worn while sanding.
Always wear hearing protection, and a dust mask while sanding.
Exposure to high noise levels can cause hearing loss or impairment. Wear EN-ISO approved hearing
protection (earmus) when using this equipment.
Bodily injury could occur if power is supplied to the machine with the power switch already in the “ON”
position. Always check to assure the power switch is “OFF” before connecting the machine to its power
source.
DO NOT use this machine to sand furniture. DO NOT ride on this machine.
DO NOT put any objects into openings. DO NOT use with blocked openings. Keep free from dust, lint, hair or
anything that may reduce airflow.

7
Transporting and Handling
1) Ensure the power supply cable is disconnected
from the mains and the machine.
2) Always move the sanding machine using the two handles with
the bag support turned upwards. Protect the sanding discs with
abrasive discs and ensure the screws fastening the abrasive discs
are secured well. When transporting the sanding machine on a
vehicle always ensure it is well secured and cannot move. Always
lift and move the machine with care.
Introduction
Safe and correct use
This instruction manual should be read carefully before using the Bona Dual Edge wood floor steering sander for the
first time.
The instruction manual contains important information on safety and preventing improper use of the machine and will resolve any doubts
or questions, making possible to operate the machine safely and with ease. Removing safety features could cause death or physical injury.
Familiarize yourself with the machine before using it for the first time.
The Bona Dual Edge wood floor steering sander is designed for the dry sanding of wood floors. Any other use without the consent of the
manufacturer is prohibited. DO NOT use on wet floors.
See ‘Prohibited use’ on page 15.
Keep hands and clothing away from moving mechanical parts.
The work area is protected by the base frame.
If a situation arises which has not been described in this manual, contact your distributor or Bona Representative.

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Machine data plate
Commencing Operation
Instructions for electrical connection
This machine only operates with the voltage and frequency shown on the machine data plate. Before
connecting the cable to the power supply ensure the correct voltage and frequency
are available.
DO NOT expose the machine to rain. This machine is intended for dry use only.
Keep the machine in a dry building and DO NOT use it in damp or wet places.
If the machine is not connected correctly to the electricity network, death due to electrocution may
occur. To prevent electric shocks always use a grounded three wire electrical system. For maximum
protection against electric shocks use a circuit protected with a dierential cut-out switch.
1) Machine model
2) Safety symbols
3) Motor power
4) Frequency
5) Supply voltage
6) Country of manufacture
7)Year of manufacture (see 9)
8) Name of the manufacturer
Introduction (Cont.)
9) Serial number:
• The first two numbers refer to the year of manufacture (14 = 2014)
• The second group of three numbers indicates the day of the year the machine was manufactured (127 = May 7th)
• The last two numbers indicate the progressive number of machines produced that day of manufacture
(13 = 13th machine produced that day)

9
Commencing Operation (Cont.)
Instructions for electrical connection (cont.)
If the machine is used with a damaged plug or power supply cable, death may occur from electrocution.
If cables or plugs are worn or damaged in any way, have them replaced by the manufacturer or certified
machine repair center in order to prevent risks to safety.
Cables, extensions and plugs
Only use approved cables. The maximum recommended cable length is 7m; for greater lengths use cables with a larger
cross-section.
Tampering with the grounding plug in any way may result in death from electrocution. DO NOT cut,
remove or break the grounding plug. If the socket does not match the plug consult a qualified electrician.
Do not use the machine if the switch malfunctions
Using the machine with unsuitable and/or excessively long cables may cause injury or damage to people or
objects.
The machine must never be moved using its cable and the cable must never be pulled when disconnecting
from the socket.
Keep the cable away from sources of heat, oil and sharp edges.
MACHINE WITH 230V~50Hz MOTOR
For machines with a 230-240V~50Hz motor (EU), a HO5VV-F 2x1.5mm2HAR-approved power supply cable must be used along with an approved
SCHUKO 2P+E 16A 200÷250V plug.

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Commencing Operation (Cont.)
Prevention Measures for Users
Removing sawdust generated during use
Personal safety measures
Sawdust can ignite spontaneously and cause injury or damage. It must be disposed of properly. Always
empty sawdust into metal containers located outside the building. Empty the contents of the dust bag when
it is 1/3 full. Empty the dust bag at the end of each machine use. Never leave the dust bag unattended when it
contains sawdust. DO NOT empty the contents of the dust bag above a fire.
Sawdust can spread through the air and be inhaled when using the sander. Always wear a dust mask when
using the sanding equipment.
The eyes and/or body may suer injury if personal safety clothing is not used. Always wear safety goggles,
protective clothing and a dust mask during sanding operations.
Lengthy exposure to noise levels during sanding operations may damage the hearing. Always use ear
protectors during sanding operations.
Never become distracted during sanding operations, check what is happening continually. Use common
sense. DO NOT use the machine when tired.
Compliance with safety measures and warnings
Using the machine when not fully assembled may cause injury or damage to people or objects. DO NOT
use the machine when it is not fully assembled. Keep all fittings tightly closed. Maintain machine settings in
accordance with the specifications.
Using the machine without the safety guards and covers in position may cause injury or damage. Always
ensure that all safety guards and covers are in position and secured well.

11
Compliance with safety measures and warnings (cont.)
Prevention Measures for Users (Cont.)
The sanding machine may create an explosive environment. Cigarettes, cigars, pipes, lighters, pilot flames,
or any other source of fire may create an explosion if lit during sanding operations. No sources of fire
should be kept near the work area.
Poorly ventilated work areas may create an explosive environment when some combustible materials
are present in the atmosphere, such as solvents, thinners, alcohol, fuel, some paints, wood dust or
other combustible materials. Floor sanding may cause various materials and fumes to ignite. Read the
manufacturer’s instructions for each chemical product used and establish its combustibility. Always keep
the work area well-ventilated.
Striking nails when sanding may generate an explosion or fire. Always ensure all nails are sunk before
sanding surfaces.
Serious damage may occur if the power supply circuit trips repeatedly or is undersized. Have the fuses,
safety circuit and power supply line checked by an authorized electrician.
Performing maintenance and/or repairing the machine when it is not fully disconnected from the power
supply may cause death due to electrocution. Disconnect the power supply before carrying out any
maintenance and/or repair work.
The use of this machine on a circuit which is not grounded may cause death due to electrocution. Never
disconnect or disable the grounding conductor. Consult an electrician if the ground conductor is missing or
it is suspected that the circuit is not suitably grounded.
The use of this machine with a damaged power supply cable may cause electric shock. Check the
power supply cable regularly for damage such as splitting or wear and tear. DO NOT use
the machine if the power supply cable is damaged. DO NOT use the electric cable to move
the machine.
Injury or damage may occur if the machine runs over the power supply cable and it becomes damaged.
Keep the cable away from the lower part of the machine to avoid contact with the abrasive. Always keep
the power supply cable raised above the machine.
The moving parts on this machine may cause serious injury and/or damage. Keep hands, feet and loose
clothing away from all moving parts of the machine.
Performing maintenance or replacing the dust bag may cause injury to the operator or people nearby if the
machine is connected to the power supply.

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Bona Dual Edge Manual
Compliance with safety measures and warnings (cont.)
Prevention Measures for Users (Cont.)
Instructions on Correct Machine Use
Failure to comply with instructions on this machine and in this manual may cause serious injury and/or
damage. Read and comply with all safety instructions. Ensure that all plates, labels,
warnings and instructions are secured to the machine. New plates can be obtained from an authorized
Bona dealer.
Injury or damage may occur if maintenance operations or repairs are carried out by any unauthorized
personnel.
The machine may become damaged if it is not kept in a dry building. Keep in a dry building.
Read this manual carefully and become familiar with the machine.
The equipment is suitable for industrial use (e.g. in hotels, schools, hospitals, oices, factories and shops).
The following information highlights particularly hazardous situations for the operator and/or machine. Understand when these conditions may be
present. Removing safety features could cause death or physical injury. Take all steps necessary to instruct personnel who may use the machine.
Report any damage on the machine or incorrect operation immediately.
1) Keep hands and clothes away from rotating parts.
2) Keep hands on the handle when the motor is operating.
3) DO NOT leave the machine unattended when the motor is operating.
4) Always use the machine with the dust bag in the correct position.
5) DO NOT detach the dust bag when the motor is operating.
6) Always disconnect the power supply cable from the machine before performing maintenance.
7) Transport the machine with care.
8) Always use the machine in well-ventilated areas.
9) Always keep the work area well-lit.
10) Always dispose of the sawdust appropriately.
11) Use the type and amount of abrasive specified in the instruction manual.
12) The use of accessories other than those recommended in this manual may cause injury.
13) The machine is for indoor use only.

13
It is prohibited to place objects on the base frame to imitate the weight of the arms or body.
The Bona Dual Edge is defined as a steering sander due to its innovative control characteristics (patent pending). The point of pressure is related
to the chosen direction whereby the pressure exerted on one side moves the machine in the same direction. Therefore, the machine moves left
and right on the basis of the force and pressure applied to the handles.
Until now all small disc sanders have required point pressure (i.e. a load perpendicular to the center of the machine), whereas the Bona Dual
Edge steering sander has two counter-rotating discs. The thrust of the left disc is counterbalanced by the thrust in the opposite direction exerted
by the right disc (A).
The correct operator position for optimum control is behind the
machine and not at the side, with one hand on each handle. Once
the machine has been started it can be noted that it remains quite
stationary even though the discs in contact with the floor are turning.
To move the machine to the right, exert light
downward pressure on the right handle (B).
To move the machine to the left, exert light
downward pressure on the left handle (C).
Machine Control Instructions

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Bona Dual Edge Manual
Machine Specifications
Abrasive Disc Size:
Disc Size:
Disc Speed:
Motor Speed:
Motor:
Disc Tilt Control:
Starting Control:
Safety Protection:
Bearings:
Noise Level:
(IEC 60704-1 [continuous weighted
sound pressure level A, measured
at a distance of 0.4m from the
handle and a height of 1.5m from the
ground])
Vibration:
(ISO 5349 [weighted value of the
mean square deviation of the
acceleration])
Net Weight:
Gross Weight:
Machine Dimensions:
Gross Packaging Dimensions:
Standard Equipment:
2x Ø 100mm
2x Ø 100mm
4500rpm
14000rpm
(A40) EU — 230V~50Hz — 1.15kW
Adjusting the height of the rear wheel support OMNICASTER™
Hand grip lever
Via "operator presence" start lever: motor stops when lever is released
Lifetime lubricated ball bearings
85dB(A) max
≤ 1.5m/s²
9kg
10kg (Cardboard packages)
320mm (Height at handle)
425mm (Height at suction tube)
255mm (Width at handle)
221mm (Width of base frame)
430mm (Length)
450mm x 430mm x 320mm (Cardboard packages)
Dust bag
Electric cable with plug (7m)
Accessory bag with start-up keys
User and maintenance manual

15
Machine Warnings
This equipment is not suitable for collecting hazardous dust.
Using the machine to move objects or moving on an incline may cause injury or damage.
The machine must only be used to sand dry wooden floors which are level or have a maximum incline of
2%. DO NOT use the machine to sand furniture. DO NOT sit astride the machine when it is operating.
Work surfaces may be seriously damaged if the machine is left turning on one point while
the tool is in contact with the surface. Move the machine at constant speed.
Prohibited use
Children should be supervised to ensure that they do not play with the appliance. This machine is not
intended for use by persons (including children) with reduced physical, sensory or mental capabil-
ities, or lack of experience and knowledge unless they have received instructions regarding the use
and are supervised by a person responsible for their safety.

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Bona Dual Edge Manual
1) Become familiar with the machine and read all instructions & safety
notices. Ensure that all operators read this manual.
4) Fit the disc in accordance with the 'Abrasive Assembly Procedures' (pg. 18).
2) Bring the machine to the place of work. If the machine has been
removed from the original packaging, pull the suction pipe locking
piston (A) and turn the pipe 180°.
To start the machine proceed as follows:
Starting the Machine
Only use discs with a diameter of 100mm.
3) If using DCS, connect DCS cu to shorter DCS pipe and fasten with a clamp.
If using a dust bag, place the dust bag on the suction pipe by tying the cord over the flange.

17
Starting the Machine (Cont.)
6) Raise the discs so that the machine is only resting on the floor with
its rear wheel. Then, press and hold the switch (A).
7) Keep the machine moving when the discs are lowered and in
contact with the work surface.
8) To stop the machine, raise the discs so that the machine is only resting on the floor with its rear wheel. Then, release the switch (A).
The switch must be kept pressed to operate the machine. The machine gradually stops when the switch is
released or the power supply is interrupted.
The disc does not stop immediately! Take care not to touch it with any part of the body during
this phase.
5) Locate the power supply. The socket must be compatible with the plug. Connect the plug to the socket.

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Adjusting the working surface on the floor
The discs operate best when slightly tilted with respect to the floor.
The tilt is determined by the position of the wheel support which is
fitted at the rear of the conveyor. To adjust, loosen the nut (A) and let
the support slide. Tighten the nut (A) once the required height has
been reached.
3) Remove the worn abrasive paper discs
from the velcro-backed discs.
4) Ensure the velcro-backed discs are clean and
position new 100mm diameter abrasive discs.
Machine Adjustment Procedures
5) Attach the abrasive discs, securing them well to the velcro.
Abrasive assembly procedures
1) Ensure the electric cable is disconnected from the power. 2) Turn the machine over, resting the handles on the floor.
Adjusting the belt tension
The distance beetween arm(A) and conveyor(B) should be 14.5-15 mm.
Verify the correct belt tension with fingers after the replacement.

19
Routine Maintenance
To keep the machine in good working condition the following items must be checked and serviced regularly.
Sawdust chamber (for the user)
Vacuum the sawdust chamber regularly to prevent the hazardous accumulation of dust.
Discs (for the user)
Check the surface of the discs regularly and remove any dirt.
Spherical Wheel (for the user)
Even though the spherical OMNICASTER™wheel is self-cleaning regarding sawdust,
remove dirt from the machine unit and wheel regularly. Dirt may cause uneven sanding.

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Dust bag (for the user)
Graphite brushes (for the user)
Remove the bag and shake it well to remove sawdust.
Turn the bag inside out and wash it in the machine in cold water to prevent blockage of the pores and a decrease in dust collection ability.
We strongly recommend the Bona DCS as an alternative to the fabric bag.
The motor has two graphite brushes that must be checked every six months or after 400 hours of operation. Proceed as
follows:
Routine Maintenance (Cont.)
1) Remove the screws on the side motor
covers (A) with a screwdriver.
2) Remove the cover (A).