Industrial Products

Industrial Products | Hydraulic HoseTightening Torque

  • Follow the below tightening torque.
  • The tolerance is approximately ±10%.
  • The application of each of the following torques is allowed on the prerequisite that there is no oil left on the threads portion and inside of the nut and also that the hexagonal part of each insert is firmly held by a spanner so as to prevent the coupling from rotating together with hose.

Coupling (Material : Steel / Surface : Zinc Plating•Chromate Treatment)

Coupling Hose
02 03 04 05 06 08 10 12 16 20 24 32
F / C / R
type		 Pipe Thread 1/8 1/4 3/8 1/2 3/4 1 11/4 11/2 2
Torque
N / m		 15 25
*15		 34
*25		 64
*29		 132 196 225 255 412
F2 / F3
type		 UNF
thread		 - - 7/16
-20		 1/2
-20		 9/16
-18		 3/4
-16		 7/8-14 1
1/16
-12		 1
5/16
-12		 1
5/8
-12		 - -
Torque
N / m		 - - 20 29 39 49 59 118 137 167 - -
F4
type		 M
thread		 - - M14
×1.5		 - M18
×1.5		 M22
×1.5		 M24
×1.5		 M30
×1.5		 M33
×1.5		 - - -
Torque
N / m		 - - 25 - 49 78 137 176 196 - - -
Q2
type		 UNF
thread		 - - 9/16
-18		 - 11/16
-16		 13/16
-16		 1-14 13/16
-12		 17/16
-12		 111/16
-12		 2-12 -
Torque
N / m		 - - 39 - 67 78 118 157 196 327 430 -

When the material is brass, Refer to the figure with *

For sure and proper tightening , the use of a torque wrench (shown below) is recommended.

Bolt for Split Frange(Material : Steel)

Coupling Hose
08 10 12 16 20 24 32
For Standard
Pressure		 Catalog Number 8YA08S 8YA12S 8YA20S 8YA24S
Torque
N / m		 20~25 28~40 37~48 48~62 62~79 73~90
For High
Pressure		 Catalog Number 8YA08H 8YA12H 8YA16H 8YA20H 8YA24H 8YA32H
Torque
N / m		 20~25 33~45 56~68 85~102 151~181 271~294

Bolt for JIS Frange(Material : Steel)

Coupling Hose
08 10 12 16 20 24 32 40 48
For JIS21MPa
(210kgf/cm2)		 Catalog Number 8YAK15 8YAK25 8YAK40 8YAK65 8YAK80
Torque
N / m		 34~45 54~76 147~230 314~451 470~637

When a split flange or a square flange is used for a hose connection, the bolts must be tightened diagonally with the same torque applied. Otherwise, the flange will incur damage, possibly followed by oil leakage.