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1 User Responsibility
This tool will perform in conformity with the description contained in the instructions provided. This tool must be
checked periodically. Defective equipment (including service leads) should not be used. Parts that are broken,
missing, plainly worn, distorted or contaminated, should be replaced immediately. Should such repair or replace-
ment become necessary, it is recommended that such repairs are carried out by qualified persons approved by
metabo or its representatives.
This tool or any of its parts should not be altered or changed from standard specifications. The user of this tool
shall have the sole responsibility for any malfunction which results from improper use or unauthorized modification
from standard specifications, faulty maintenance, damage or improper repair by anyone other than qualified
person approved by metabo or its representatives.
2 Safety Precautions
● Use only chisels approved for use with pneumatic chisel hammers
● Always wear appropriate apparel (safety glasses, gloves, helmet)
● Always disconnect from compressed air supply before servicing
● The work place sound power level can exceed 85 dBA. In this case noise control measures for the operator
are required.
3 Preparing for Operation
Ensure compressed air is dry and air lines do not contain condensate. Set to desired impact power by adjusting
the regulator screw. Use only chisels and bits in good operating condition and suitable for the job.
Place chisel in spring retainer, hold retainer at front end and screw onto
cylinder.
To change the chisel hold rear end of spring retainer and unscrew from
cylinder.
Note: To prevent built-up of dust or foreign matter inside the chuck, lubricate with a few drops of machine oil every
two working hours.
4 Air Supply
The operating pressure for this air tool should not exceed 6 bar/87 psi. A higher operating pressure, as well as
soiled air shorten the life of the air tool and may cause dangerous situations. Condensate (condensed water) in
the air lines damages an air tool. Drain condensate from pressure vessel daily. Clean filter or screen in air inlet of
the air tool at least once a week. It is recommended to install a pressure regulator with integrated water trap and
an oiler in the supply line near the tool.
5 Maintenance
Give a few drops of pneumatic oil into the air inlet daily.
6 Specifications
MHS 315 S MHS 450 S
Operating pressure 6 bar / 87 psi 6 bar /87 psi
Air consumption 156 l/min 430 l/min
Air inlet thread 1/4" 1/4"
Recommended hose size 9 mm / 3/8" i.d. 9 mm / 3/8" i.d.
Weight 1.2 kg 2.0 kg
Blows per minute 3000 2900-3300
Piston diameter 19 mm 19 mm
Piston stroke 67 mm 67 mm
Vibration 8.2 m/s
2
8.2 m/s
2
Sound power level LP
A
at the operator's
ear based on DIN 45 635 ff 88 dB 88 dB
The noise emission of this chisel hammer has been measured according to DIN 45 635 ff; 84/537/EEC for
chisel hammers.