Panasonic EY7546 - Manual (Page 13)

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VI
. ACCESSORIES
Use only suitable size of bit.
Panasonic original Optional Quick change chuck (EY9HX110E).
Chuck Size: 6.35 mm (1/4”) hex
VII
. APPENDIX
MAXIMUM RECOMMENDED CAPACITIES
Model EY7546 EY7547 EY7550 EY7551
Screw driving
Wood screw 3.5 mm - 9.5 mm
Self-drilling screw 3.5 mm - 6 mm
Bolt fastening
Standard bolt:M6-M16
High tensile bolt : M6 - M12
2) Tightening time
Longer tightening time results in increased
tightening torque. Excessive tightening,
how ever, adds no value and reduces the
life of the tool.
3) Different bolt diameters
The size of the bolt diameter affects the
tight ening torque.
Generally, as the bolt diameter increases,
tightening torque rises.
4) Tightening conditions
Tightening torque will vary, even with the
same bolt, according to grade, length, and
torque coefficient (the fixed coefficient indi-
cated by the manufacturer upon produc-
tion).
Tightening torque will vary, even with
the same bolting material (e.g. steel),
accord ing to the surface finish.
Torque is greatly reduced when the bolt
and nut start turning together.
5) Socket play
Torque is lowered as the six-sided configu-
ration of the socket of the wrong size is
used to tighten a bolt.
6) Switch (Variable speed control trigger)
Torque is lowered if the unit is used with
the switch not fully depressed.
7) Effect of Connecting Adaptor
The tightening torque will be lowered
through the use of a universal joint or a
connecting adaptor.
EY7551
M8, M10 x 35 mm. M12 x 45 mm
High tensile bolt
196.0
（2000）
147.0
（1500）
98.0
（1000）
49.0
（500）
0.5 0.0 1.0 1.5 2.0 2.5 3.0
M12
M10
M8
N s m
(k gf-cm)
Tightening torque
Tightening time (Sec.)
Bolt
Nut
Washer
Steel plate
thickness 10 mm (3/8")
Washer
Spring washer
Tightening conditions
• The following bolts are used.
Standard bolts: Strength type 4.8
High tensile type 12.9
4.8
Explanation of the strength type
Bolt yield point
( 80 % of tensile strength)
32 kgf/mm 2 (45000 psi)
Bolt tensile strength
40 kgf/mm 2 (56000 psi)
EY7546_EY7547_EY7550_EY7551_EU.indb 13 2011-2-25 14:40:11