|
Nut Bolt Clamp
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Type 'A'
|
Serrations
|
|
Material
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Mild Steel CR to BS:1449
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|
|
AISI S.S 304
|
|
Band Width
|
9 and 12 mm
|
|
Housing
|
One Piece
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Specification: BS 5315/1976 and IS 4762/1984 Material: The material used in manufacture of Worm Drive Hose Clips shall be selected at the manufacturer's discretion provided that the finished clamps are capable of passing the tests specified Manufacture Screw: Shall be held captive in the Clamp Housing Band: Band shall have a thread from commencing at the free end and extending for a length sufficient to enable the clamp to be tightened on to the smallest diameter of component with in the working range for which it is designated Housing: The housing shall not be readily removable from the band Finish:
- Clamp shall be smooth and free from burrs and sharp edges.
- Clamp produced other than from corrosion resistant materials (stainless steel) shall be protected from electroplating coating of zinc-as per FeZn 12 of IS: 1573/1970 & BS:1706-Zn3
Dimensions
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Size X
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Y Max
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Z Max
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|
12-20
|
14 mm
|
25 mm
|
|
22-25
|
20 mm
|
25 mm
|
|
28-40
|
25 mm
|
30 mm
|
|
45 & Above
|
28 mm
|
33 mm
|
Tests Free running Torque Test: For this purpose the torque required exceed 1.5 Nm i.e. (13.3 ibf/ln or 0.16 kgf/m) Torque Test: The Clamp shall be tightened to 75% of the Torque Load, as shown in table. On release, Clamp shall reveal no sign of permanent distortion of the housing, nor efficient functioning of the Clamp size. The Clamp shall then be retightened until permanent distortion or failure occurs, at these point Torque Load shall be in excess of the value shown in table.
|
Size mm
|
Torque value Nm
|
75% Value Nm
|
Kgf/m
|
Ibf/in
|
|
12 to 20
|
4.5
|
3.4
|
0.345
|
30
|
|
22 to 28
|
5.6
|
4.20
|
0.435
|
37.5
|
|
30 to 45
|
6.8
|
5.10
|
0.52
|
45
|
|
50 to 60
|
7.9
|
5.92
|
0.60
|
52.5
|
|
70 to 140
|
9.0
|
6.80
|
0.79
|
60
|
Hydraulic Pressure Test The fluid used for the test shall be water at room temperature. Torque applied shall not be more than 75% of the value. Pressure shall be applied gradually from an external source until leakage or other failure occurs, at which stage the pressure shall be not less than the appropriate value specified.
|
|
Mpa
|
Kgf/Cm2
|
Ibf/In2
|
|
12 to 30
|
1.41
|
14.1
|
200
|
|
35 to 70
|
0.84
|
8.4
|
120
|
|
75 to 160
|
0.42
|
4.2
|
60
|
|
