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2 bolt torque, Sae 2 bolt diameter "a" sae 5 sae 8 – Echo 76628S User Manual

Page 32

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PN 14295-00 R

30

SPECIFICATIONS

7.2 Bolt torQue

The tables shown below give correct torque values for various bolts and capscrews. Tighten all bolts to the torques

specified in chart unless otherwise noted. Check tightness of bolts periodically, using this bolt torque chart as a guide.

Fasteners should be replaced with the same grade. Tighten serrated or center-lock nuts to the full torque value.

Do not use these values if a different torque value or tightening procedure is given for a specific application. Torque
values listed are for general use only.

Torque figures indicated at left are
valid for non-greased or non-oiled

threads and heads unless otherwise

specified. Therefore, do not grease

or oil bolts or capscrews unless

otherwise specified in this manual.

When using locking elements, in-
crease torque values by 5%.

* torque value for bolts and

capscrews are identified by their
head markings.

SAE - 8

SAE - 2

A

SAE - 5

SAE
Grade
and
Head
Markings

BOLT DIAMETER

A

B

SPECIAL TORQUE REQUIREMENTS

LOCATION ON MACHINE

HARDWARE DESCRIPTION

TORQUE

(UNIFIED INCH))

TORQUE

(METRIC)

ON ROTOR PLATE, BLADE MOUNTING BOLTS

5/16" X 1" HEX HD. GRADE 8 BOLTS (QTY 8)

20 ft-lbs

27 N.m

ON ROTOR KNIVE SHAFTS

10-24 X 1-1/8" SCREW (QTY 6)

36 in-lbs

4 N.m

UNIFIED INCH BOLT TORQUE VALUES

(unless otherwise specified in the manual)

Bolt Torque *

(N.m)

(ft - lb)

(N.m)

(ft - lb)

(N.m)

(ft - lb)

1/4"

7.5

5.5

12

9

17

12.5

5/16”

15

11

25

18

35

26

3/8”

27

20

44

33

63

46

7/16”

44

32

70

52

100

75

1/2”

67

50

110

80

150

115

9/16”

95

70

155

115

225

160

5/8”

135

100

215

160

300

225

3/4”

240

175

375

280

550

400

7/8”

240

175

625

450

875

650

1”

360

270

925

675

1300

975

1-1/8”

510

375

1150

850

1850

1350

1-1/4”

725

530

1650

1200

2600

1950

1-3/8”

950

700

2150

1550

3400

2550

1-1/2”

1250

930

2850

2100

4550

3350

SAE 2

Bolt

Diameter

"A"

SAE 5

SAE 8