The diameter ΦA required for the inlet pipe is recommended on the specifi cation table.
The diameter ΦB required for the branch pipe (from to ) should be 2 times as large as
ΦA. ΦB = 2 x ΦA
The diameter ΦC required for the primary air supply (from to ) should be 3 times as
large as ΦA. ΦC = 3 x ΦA
The length for the inlet pipe should be less than 15 feet (4.5m).
1.The maximum recommended air pressure during operation must not exceed
90 psi (6.3bar). Higher air pressure may create unsafe operating conditions for
the tool and the user.
2.The compressed air should be cooled and have a water fi lter installed at the
outlet end of the compressor. Even with a water fi lter installed, some water
may still condense in the piping or hose and will enter the tool mechanism
causing premature damage to the tool. Therefore, it is recommended to install
an air fi lter-lubricator device somewhere between the tool and the compressor.
3.Always use an air compressor of the proper capacity to operate each tool.
4.Clean the hose with a blast of compressed air before connecting the hose to
the air tool. This will prevent both moisture and dust inside the hose from
entering the tool and causing possible rust or malfunction.
1.Using these tools in any potentially explosive environment is strictly prohibited.
2.It is always recommended that these types of tools must be operated when
standing on a solid or fi rm location.
3.Always use these tools in a well ventilated area.
4.Slipping, stumbling and falling are the major causes of potential serious injury,
therefore, a clean and clutter free surface in the working area before operating
the tools is strongly recommended.
Read this manual carefully before installing, operating,
servicing or repairing.
Working environment:
Air supply and connection requirements:
Pressur
e Check P
oint
Air Com
pressor
Air Tank
Refrig
erated Air D
ryer
Oil Filte
r
Shut-Off Cock
Shut-Off Cock
Filter ,Regulator&Lubricato
r
Wa
ter Drain
Air T
ool
Working environment:
Piping diameters and length requirement:
1. This tool should only be used as a hand operated tool. It is powered by compressed air and is not
insulated against electric shock.
2. This tool is specially designed for grinding sharp edges, burrs, or a surface which needs to be
cleaned or smoothed. Any application or use of this tool other than what it is designed for is strictly
prohibited.
3. Make sure that the wheel dimensions are compatible with the grinder and the wheel fi ts the spindle.
4. High sound levels may cause hearing damage. Always wear hearing protection when operating this tool.
5. Wearing eye/face protection can reduce the danger of high-speed materials being emitted from the tool.
6. User must wear proper clothing. Loose clothing, long hair, stings, straps, belts and jewelry should
not be worn when operating this tool.
7. Always wear gloves to reduce the risk of cuts or burns.
8. Working with certain materials may create emission of dust and fumes, which may cause a potential
explosive environment and a hazard to the health. Therefore, wearing correct breathing protection and
taking some preventive measures are recommended.
9. Make sure that the allowed operating speed of the grinding wheel to be used on this tool is higher
than 15000R.P.M.
10.Inspect the grinding wheel carefully before use. Using a chipped, cracked or otherwise defective
wheel will create an unsafe operating environment.
11. Make sure that the grinding wheel is correctly mounted and tightened before use. Run the
tool at no-load for 30 seconds in a safe location to check the function. Stop immediately if there is
considerable vibration or any other defects.
12. Also make certain that the wheel guard is in place, in good condition, is mounted correctly and is
inspected regularly.
13. Ensure that the work piece is properly supported or fi xed before operating.
14. Ensure there are no bystanders in the vicinity of working area.
15. Test run the tool to make sure of the rotation direction before practical use. This can reduce the
potential hazard due to unexpected rotating direction.
16. Make sure that the direction of the sparks generated from the grinding wheel is properly directed
so as to not create a hazard.
17. Always turn off the air supply and disconnect the air hose before replacing grinding wheel or
making adjustments on this tool.
18. Make sure there is no gas or combustible material stored near the tool when servicing, changing
insert tools, or storage.
Warning:
19. It is forbidden to use a separate reduction bushing or adaptors to adapt lager hole grinding wheel.
20. To prevent an accidental start, rest the idle grinder in a stable position.
21. Release the throttle lever to avoid danger if there is a failure of energy supply and when
connecting or disconnecting the air hose.
22. Examine the grinding wheel thoroughly before re-use if the tool has been dropped.
23. Prolonged use will cause user fatigue. Periodic breaks are recommended for user safety.
24. It is recommended to stop operating the tool whenever the user experiences discomfort, tingling or
pain during use.
25. Beware if the compressed air hose breaks unexpectedly, or is being connected or disconnected
improperly. This whipping action may cause injury.
26. The spindle speed needs to be check regularly by a tachometer, with the grinding wheel removed.
It should not be higher than the rated free speed under maximum operating pressure.
27. Avoid storing this tool where it is subject to high humidity.
1. Before connecting the air hose to this tool or after operating, apply 4 or 5 drops
of pneumatic oil into the air inlet and run it for several seconds, referring this
operation to the attached picture.
2. Maintain this tool regularly by performing the same oiling application every 3 to
4 hours of operation.
3. Do not lubricate tools with fl ammable or volatile liquids. Use only the lubricant
recommended by Mighty-Seven or authorized dealers. Any other lubricant will
lead to reduce performance of the tool and permanent damage. Whenever
any unauthorized lubricant is used by accident, flush it immediately with
recommended pneumatic oil.
4. Follow all the recycling laws of waste disposal once this tool is no longer
usable.
Maintenance:
Pneumatic oil
Air inlet
Regular maintenance
Original Language
Serial Number: Please refer to the tool
Air Angle Grinders
Item No.: QB-7215
We declare under our own responsibility that the above machinery fulfi ls all the
relevant provisions of (MD) Machinery Directive 2006/42/EC and its amendment and
is manufactured and tested according to the following standards:
EN ISO 11148-7 / EN ISO 15744 / EN ISO 28927-1
Declared in: Taichung, Taiwan
Dated:2020/01/01
Jay Lin
Declared by: QA Manager
Manufacturer:
Mighty Seven International Co., Ltd.
No. 70-25,Ching Qunag Rd., Wu-Jih Shiang,
Taichung Hsien, 41466 Taiwan
www.mighty-seven.com
Authorized contact, to compile the technical fi les :
King Tony France
3 Rue des imprimeurs ZI République Nord 1.
86000 POITIERS FRANCE
TEL
：
(+33) 5-49-30-30-90
：
Signature
CE DECLARATION OF CONFORMITY
Shank stone replacing:
Use the supplied spanners to replace.
Note:Turn counterclockwise to open
and replace.
