Blastrac BG-250-230 User manual

BG-250-230/60
Electric 230v, 1ph
Concrete Grinder
Blastrac
6215 N. Aluma Valley Dr.
Oklahoma City, OK 73121
1-800-256-3440
© Copyright Blastrac Revision (A) 10-20-05

Operating Instructions BG-250-230/60
Technical Data October 2005
Contents Chapter 1
1.1 Rating
1.2 Unit specifications
1.3 Operating range and correct usage
1.4 Machine type designation
1.5 Advice for operators of the machine
© Copyright Blastrac 1Revision (A) 10-20-05

Operating Instructions BG-250-230/60
Technical Data October 2005
1.1 Rating
Unit / Designation: Blastrac Grinding machine
Machine type: BG 250-230/60
Manufacturer:
Blastrac
6215 N. Aluma Valley Dr.
Oklahoma City, OK 73121
1.2 Unit specifications
Technical data:
Grinding Machine BG-250-230/60
Power consumption 5 HP
Tool diameter 10 in (250 mm)
Working width 10 in (250 mm)
Dust hose connection 3 in (75 mm)
Recommended Dust Collector Blastrac® Turbo-Vac II or Blastrac 1-13DC
Noise Level 78 DBA
Vibration Level < 2,5 ms²
© Copyright Blastrac 2Revision (A) 10-20-05

Operating Instructions BG-250-230/60
Technical Data October 2005
Dimensions:
BG-250-230/60
Length 49.25 in (1250 mm)
Width 24.50 in (620 mm)
Height 39.38 in (1000 mm)
Weight 271 lbs (123 kg)
1.3 Operating range and correct usage
The BG-250-230/60 is exclusively designed to grind
horizontal surfaces. The machine may not be used for
other purposes. The manufacturer will not be liable
for damage or injury resulting from such incorrect
usage.
1.4 Machine type designation
Machine Type – BG (Blastrac Grinder)
Working Width – 250 (mm)
Power Plant – 230/60 (5 HP, 230v, 60 Hz, 1ph)
© Copyright Blastrac 3Revision (A) 10-20-05

Operating Instructions BG-250-230/60
Technical Data October 2005
1.5 Advice for operators of the machine
When you use the BG-250-230/60 it is possible to
exceed the maximum allowable sound level of 85 db(A).
That sound level will vary depending on the location. If
the sound level reaches 85 db(A) or more, the operator
and the surrounding personnel must wear OSHA
approved hearing protection.
Verify that you always rest the machine on the kick stand if not
grinding. If you rest the machine on the grinding disc, the flexible
coupling will deform, causing unequal wear on the tools and
increased vibration level.
© Copyright Blastrac 4Revision (A) 10-20-05

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 5Revision (A) 10-20-05
Contents Chapter 2
2.1 Warnings and symbols
2.2 Organizational measures
2.3 Personnel selection and qualification
2.4 Safety precautions applicable to some operating sequences
2.5 Special work instructions
2.6 Definition of the Maintenance Mode
2.7 Possible dangerous aspects of the equipment
2.8 Electrical

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 6Revision (A) 10-20-05
2.1 Warnings and symbols
The following symbols are used in the Operating Instructions to highlight areas of
particular importance:
Symbol of operational safety.
In these Operating Instructions this symbol will be
shown next to safety precautions that are to be
taken in order to increase safe operation of the
machine. Follow these instructions and take special
care in these circumstances. In addition to these
instructions, your general organizational safety
precautions and accident prevention guidelines are
also to be followed.
Details regarding the economical use of the
equipment.

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 7Revision (A) 10-20-05
Information, instructions and restrictions with regard
to possible risks to personnel and/or to extensive
machine damage.

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 8Revision (A) 10-20-05
Warning against dangerous voltages.
Indications relating to protective devices in electrical
appliances.
Indications where consultation with the
manufacturer is required.
Instructions relating to periodic checks.
Reference to important instructions contained in the
Operating Instructions.

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 9Revision (A) 10-20-05
.2 Organizational measures 2
The Operating Instructions are to be kept near the machine all
times.
In addition to the Operating Instructions, general and legal regulation
acciden s t prevention and environmental protection must be complied with.
ations.
xample work organization, work procedures and personnel allocation.
ns during
ork is too late. This particularly applies to incidental activities such as setting up
f safety concerns and hazards.
regarding
Such duties may, for example, relate to the handling of hazardous substances,
wearing of personal protective equipment and compliance with traffic regul
The Operating Instructions must be supplemented by instructions including the
duty to supervise and report relating to particular working practices, for
e
Personnel entrusted with working with the machine must have read the entire
Operating Instructions before starting work. To read these instructio
w
the equipment, carrying out maintenance work or training staff to work with the
machine. Read and understand the Honda Engine Manual before using this
equipment.
From time to time the working practices of the staff are to be checked regarding
awareness o
Personnel must tie back long hair and not wear loose clothing or jewellery
including rings.
Use personnel protection equipment if necessary or required by
regulations. Take notice of all safety and hazard notices on the
machine.
A
lell safety and hazard notices at or on the machine must be kept co gible. mplete and

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 10 Revision (A) 10-20-05
If safety-critical changes occur to the machine or its working method, the
machine must be shut down immediately. The cause of the fault must be
established immediately and corrected prior to further operation of the machine.
Changes, add-ons or conversions to the machine which might impair
safety must not be undertaken without the manufacturer's written
permission.
This applies in particular to the fitting and adjustment of safety devices as well as
to welding on load-bearing parts.
Spare parts must comply with the technical requirements specified by the
manufacturer. This is always guaranteed if original spare parts are used.
Intervals for recurring checks and inspections specified in these
Operating Instructions must be complied with.
To perform maintenance work correctly it is imperative to be
equipped with the proper tools for the task.
The location and the operation of fire extinguishers must be made
known at each work site.
Take note of the facilities for reporting and fighting fires.
2.3 Personnel selection and qualification
Fundamental duties:
Work on the machine may only be undertaken by authorized personnel.
Only trained personnel may be deployed. Note the statutory minimum age.
Specify clearly the responsibilities of personnel for operation, setting up,
servicing and maintenance work.
Make sure that only authorized personnel operate or work on the machine.

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 11 Revision (A) 10-20-05
Personnel being trained on the equipment may only be deployed on the machine
under constant supervision of an experienced person.
Work on electrical equipment or operating materials may only be
undertaken by a skilled electrician or by trained persons under
the guidance and supervision of a skilled electrician as well as
in accordance with the electrical engineering regulations.
2.4 Safety precautions applicable to some operating sequences
Ban any method of working that impairs safety.
Some measures have to be taken in order to operate the machine in safe and
operative conditions.
Only operate the machine when all safety devices and related
safety equipment, e.g. detachable safety devices, emergency stops
and suction devices are present and working correctly.
Check the machine visually for any damage and defects at least once a day.
In the event of operational malfunctions, the machine must be shut down
immediately and secured.
Secure the work area around the machine in public areas
providing a safety distance of at least 6ft from the machine.
Faults must be repaired prior to further operation of the machine.

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 12 Revision (A) 10-20-05
Before switching on the machine make sure that no-one can be endangered
when the machine starts up.
Do not switch off or remove the exhaust and ventilation devices when the
machine is running.
All persons in the proximity of the machine, when it is working,
must wear ear protection and safety shoes. The operator is obliged
to wear close-fitting protective clothing.
2.5 Special work instructions
Mechanical servicing work:
Put the machine in the Maintenance Mode as described in chapter
2.6 for any servicing work on the machine.
vicing the Follow any special safety instructions in the various chapters on ser
machine.
See chapter 7.1 - 7.9.
Adjustment, servicing and inspection work and time limits specified in these
Operating Instructions, as well as any information on the replacement of parts
and equipment must be undertaken and/or complied with.
These activities may only be undertaken by qualified personnel.
The operator has to be familiar with the maintenance work before starting the
process.
If the equipment is switched off in order to do maintenance, repair or adjustment
it has to be secured against unintended restart. Machine must be in
Maintenance Mode as described in Chapter 2.6 before servicing.
See Chapter 2.6 Maintenance Mode for specific details.

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 13 Revision (A) 10-20-05
Always dispose of the contents of the dust bin of a possible connected dust
collector used before loading it on van or truck. Observe the waste disposal
regulations; if uncertain situation ask your supervisor.
Do not use any aggressive cleaning materials.
Use lint-free cleaning cloths.
Always tighten any screw connections that are undone during servicing and
maintenance work.
If safety devices need to be taken off or dismantled during service and repair,
these safety devices must be reinstalled and inspected immediately after
completion of the servicing and repair work.
Make sure that process materials and replaced parts are disposed of safely
and in an environmentally-friendly manner.
Work on electrical equipment or operating materials may only be
undertaken by a skilled electrician or by trained persons under
the guidance and supervision of a skilled electrician as well as
in accordance with the electrical engineering regulations.
Make sure that electrical components used for replacement purposes comply
with the original parts and are correctly adjusted if necessary.

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 14 Revision (A) 10-20-05
2.6 Definition of the Maintenance Mode
Definition:
The machine is in a safe condition when it cannot generate any hazard.
Putting the equipment in the Maintenance Mode means:
;Lift up the machine (see Chapter 5)
;Switch off the machine.
;Switch off the dust collector.
;Wait for standstill of all drives.
;Secure against unintended restart

Operating Instructions BG-250-230/60
Safety October 2005
© Copyright Blastrac 15 Revision (A) 10-20-05
2.7 Possible dangerous aspects of the equipment
2.8 Electrical
Work on electrical equipment or operating materials may only be
undertaken by a skilled electrician or by trained persons under the
guidance and supervision of a skilled electrician as well as in
accordance with the electrical engineering regulations.
Any machine, if it is not used according the regulations, may be
hazardous for operating, setting-up and service personnel. The
operating authority is responsible for compliance with the
safety regulations during operation and maintenance of safety
devices supplied with the machine as well as the provision of
appropriate additional safety devices.

Operating Instructions BG-250-230/60
General October 2005
© Copyright Blastrac 16 Revision (A) 10-20-05
Contents Chapter 3
3.1 Range of application
3.2 Scope of supply
3.3 Description of the machine
3.4 Operating elements
3.5 The tools
3.6 Care and maintenance

Operating Instructions BG-250-230/60
General October 2005
© Copyright Blastrac 17 Revision (A) 10-20-05
3.1 Range of application
•Typical ranges of application for the BG-250 are for example:
oTo remove undulating concrete and asphalt surfaces
oTo prepare the surface for coatings
oTo remove coating defects
oTo remove residual mineral adhesives
oSmoothing of concrete
3.2 Scope of supply
Scope of supply of the machine:
;Grinding Machine (BG 250-230/60)
;Dust collector: Turbo-Vac II or 1-13DC (Optional)
;Dust hose (Optional)
;Blastrac Operating Instructions
The dust collector you have chosen for your machine ensures nearly dust free
operation and also improves machine and tool life. Blastrac uses specially
designed dust collection systems with high separation efficiency, thus extending
the life of the machine components.

Operating Instructions BG-250-230/60
General October 2005
© Copyright Blastrac 18 Revision (A) 10-20-05
3.3 Description of the machine
21
3
4
5
11
13
Fig. 3.1
1 Hand lever for jack stand 6 Grease Nipple (see Fig 3.4) 11 Jack stand
2 Handgrip 7 Bearing Unit (see Fig 3.4) 12 Caster
3 Emergency stop 8 Flexible coupling (see Fig 3.4) 13 “On” Button
4 Suction connection port 9 Diamond disc (see Fig 3.4)
5 Driving motor 10 Brush seal (see Fig 3.4)
The Blastrac grinding machine BG-250-230/60 can produce a pattern of 10
inches (250 mm) and distinguishes itself by its high economic efficiency and
easy handling. The machine levels uneven and undulating floors, therefore is
also suitable for optimisation of surfaces before blasting. Levelling the surface
will require less coating to be applied, thus reducing coating costs. The BG-250-
230/60 has a grinding speed of 3200 rpm. A flexible coupling allows the disc to
float over varied terrain, therefore keeping diamond contact to the surface at a
maximum.

Operating Instructions BG-250-230/60
General October 2005
© Copyright Blastrac 19 Revision (A) 10-20-05
3.4 Operating elements
Handgrip and Jack Stand Operating lever
21
3
13
Fig. 3.2
Before Switching on the BG-250-230/60, the front part of the grinding machine
must be lifted by pushing down on the handgrip (2) and pulling back on the jack
stand operating lever (1). When the machine has started, retract the jack stand
and slowly lower the disc to the work surface. Never slam the disc to the work
surface; this may cause machine damage and injury to personnel.