Panasonic EY7546 operating instructions EY7550

EY7550

M10 x 35 mm M12, M14, M16 x 45 mm

N σ mStandard bolt (kgf-cm)

	196.0
	（2000）						M16
torque	147.0
	（1500）
							M14
Tightening	98.0
	49.0
	（1000）			M12
	（500）		M10
	0.0	0.5	1.0	1.5	2.0	2.5	3.0

Tightening time (Sec.)

EY7550

M8, M10 x 35 mm. M12 x 45 mm

N σ mHigh tensile bolt (kgf-cm)

196.0 （2000）

torque	147.0
	（1500）
							M12
Tightening	98.0
	49.0
	（1000）
					M10
	（500）		M8
	0.0	0.5	1.0	1.5	2.0	2.5	3.0

Tightening time (Sec.)

EY7551

M10 x 35 mm M12, M14, M16 x 45 mm

N σ mStandard bolt (kgf-cm)

196.0 （2000）

M16

torque	147.0
	（1500）
Tightening	98.0
	49.0
	（1000）	M14
	（500）	M12
		M10

0.0 0.5 1.0 1.5 2.0 2.5 3.0

EY7551

M8, M10 x 35 mm. M12 x 45 mm

N σ mHigh tensile bolt (kgf-cm)

196.0 （2000）

torque	147.0
	（1500）	M12
Tightening	98.0
	（1000）
		M10
	49.0
	（500）	M8

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Tightening time (Sec.)

BoltWasher

Steel plate thickness 10 mm (3/8")

Nut Washer Spring washer

Tightening conditions

•The following bolts are used.

Standard bolts: Strength type 4.8 High tensile type 12.9

Explanation of the strength type

4.8

Bolt yield point

(80% of tensile strength) 32 kgf/mm2 (45000 psi)

Bolt tensile strength

40 kgf/mm2 (56000 psi)

2)Tightening time

Longer tightening time results in increased tightening torque. Excessive tightening, however,­ adds no value and reduces the life of the tool.

3)Different bolt diameters

The size of the bolt diameter affects the tightening­ 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), according­ to the surface finish.

Tightening time (Sec.)