Technical datasheet
GN 437-A4Hinges
Stainless steel
Zinc Die Casting / Stainless Steel, with Adjustable Friction
GN 437-A4
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Catalogue
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l1
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l2
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d
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h1
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h2
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h3
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h4
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l3
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m1
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m2
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A/F
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Max. recommended
tightening torque of the set screw in Nm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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GN 437-A4-40-40-A-GS
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40
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40
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5.3
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13.5
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5
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7
|
14
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13
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25
|
25
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2.5
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0.5
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|
GN 437-A4-50-50-A-GS
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50
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50
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6.5
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15.5
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6
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8
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16
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16.5
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30
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30
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3
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0.75
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GN 437-A4-60-60-A-GS
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60
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60
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8.3
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18.5
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7.5
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9.5
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19
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20
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36
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36
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4
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1.5
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Type
Type
- Type A: 2x2 bores for countersunk screws
Hinge leafs
Hinge leafs
- Zinc die casting ZD
- Powder coated
- Black, RAL 9005, textured finish SW
- Silver, RAL 9006, textured finish SR
- Stainless Steel AISI 316 A4
- Matte shot-blasted finish GS
Friction cone
Friction cone
Plastic (Polyacetal POM)
- Operating temperature -20 °C to +80 °C
- Black, RAL 9005
Adjustment screw / Hex nut
Adjustment screw / Hex nut
- Steel, zinc plated, blue passivated for ZD
- Stainless steel for A4
The adjustment screw in the hinges GN 437 allows the mobility of the hinge to be changed. This also generates a constant braking torque adjustable across the whole of the rotating range. The rotation of doors and flaps is so inhibited, also preventing the inadvertent movement.
The friction torque is accomplished by interlocking two slim friction cones. The large friction surface and the hard-wearing plastic of the friction cones guarantee a long service life with only slight reduction in the friction torque over time. This can be re-adjusted, if necessary, with the adjustment screw.
The stainless steel version is particularly suited for applications in highly aggressive conditions.
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