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GN 7231 Multiple-Joint Hinges Stainless Steel, Concealed, with Opening Angle of 90°

GN 7231 Stainless Steel Multiple-Joint Hinges, Concealed, with Opening Angle of 90° Type: L - Left-hand assembly angle bracket
Type: L - Left-hand assembly angle bracket

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Stainless-Steel

Product Family Stainless Steel

Standard parts made of rustproof stainless steel have been designed for use in the food sector, in the chemical industry, for aggressive ambient conditions or for outdoor use.

  • corrosion-resistant
  • precise fit
  • environmentally friendly
Show all Stainless Steel products
Standard Sheet GN 7231 Print This Page Application Video Operating Instruction General Notes, Types, Areas of Application Assembly Instructions, Technical Information Accessories, Special Versions Multiple-Joint Hinge Leaflet Stainless Steel Characteristics

Product description

Multiple-joint hinges GN 7231 are installed on the inside of flaps, hatches and doors to save space and ensure protection against vandalism. The hinges have a maximum opening angle of 90°, making them perfect for use with thick door leaves.

Use of this hinge type leaves housing exteriors free of attachments that do not match the design or that should be avoided entirely in the interests of fast and easy cleaning.

Multiple-joint hinges are typically used in pairs, meaning that one L type and one R type is used per opening. For higher loads, e.g. from large hatches, these can be supplemented with additional hinges of any type.

Specification

  • Body
    Stainless steelNI AISI 304
    Matte, tumbled finishMT
  • Friction bearing
    Bronze, self-lubricated

RoHS

Accessory

Spacer Plates GN 2370
Spacer Plates with Tapped Holes GN 2372 (Stainless Steel)
Mounting Plates with Threaded Studs GN 2376 (Stainless Steel, with Threaded Studs)

On request

  • Other materials
  • Other finishes
  • Other assembly angle brackets
  • Other opening angles
  • Other max. wall thicknesses
  • Other lifting motion
GN 7231 Stainless Steel Multiple-Joint Hinges, Concealed, with Opening Angle of 90° sketch
Hide technical drawing
GN 7231 Stainless Steel Multiple-Joint Hinges, Concealed, with Opening Angle of 90° sketch

Part Options / Table

Type

LLeft-hand assembly angle bracket
RRight-hand assembly angle bracket
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Metric

Dimensions in: Inch (change to Metric)
l1dh1h2h3l2l3l4l5l6l7l8l9m1m2rsxy
1.570.210.301.100.101.021.423.073.740.942.980.943.380.980.203.050.160.431.14
1.970.260.391.380.101.381.813.984.961.463.851.464.281.180.243.840.200.751.46
2.360.330.491.570.101.572.404.966.422.524.642.525.461.420.315.000.200.871.85

Build & Price
Material

Length l1
Type


Finish
Material

Length l1
Type


Finish

Installation Position - Pivot Characteristics

Multiple-joint hinges can be installed on the housing with the slotted holes of the assembly angle brackets that are either perpendicular or parallel to the hinge axis. This results in the two pivot characteristics depicted.
Installation position - pivot characteristics GN 7231

Application Examples
Examples of use GN 7231

Adjustment and Mounting Options
Adjustment and fastening options

Multiple-joint hinges can be adjusted in three planes during installation. For example, this allows compensation for tolerances or establishing of required compressive forces for seals.
Two planes can be adjusted via parallel or perpendicular slotted holes in the assembly angle brackets. In the third plane, position corrections can be made using GN 2370 spacer plates.
GN 2372 spacer plates with tapped holes as well as GN 2376 mounting plates with threaded studs are also available for mounting the hinges. The latter can be welded on or inserted through the wall from the outside and fastened in place.
All accessory items are designed for use with both assembly angle brackets.

Design Variants

Flaps, hatches and doors can be inset, surface-mounted or mitered. The maximum wall thicknesses and bend sizes for planned sheet metal constructions arise from the respective installation type.

  1. Assembly angle brackets mounted to the housing with slotted holes perpendicular to the hinge axis:
MD7231{St:_}NA-34385-0
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l1s1 max.b1s2 max.b2 max.s3 max.b3 max.
40251 ... ∞1 ... ∞352626
50301 ... ∞1 ... ∞453636
60351 ... ∞1 ... ∞605050

  1. Assembly angle brackets mounted to the housing with slotted holes parallel to the hinge axis:
MD7231{St:_}NA-34387-0
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l1s4 max.b4 max.s5b5 max.s6 max.b6 max.
40351 ... ∞1 ... ∞252626
50451 ... ∞1 ... ∞303636
60601 ... ∞1 ... ∞355050

The design variants shown represent standard installation conditions. If the installation position of the hinge is changed or one of the two wall thickness dimensions s or b are lower, the maximum achievable dimensions change independently of each other. This makes it possible in some cases to work with larger wall thickness dimensions than those specified with the same hinge size. A simple design check via CAD or a test setup is therefore recommended.

Construction Example
MD7231{St:_}AN-34374-0

Load Capacity

The maximum load capacity of the multiple-joint hinges specified below applies to the standard use cases and serves for orientation in the case of deviating applications. The resulting forces lead to slight elastic deformation, which can be compensated for by means of the adjustment options, if necessary.
MD7231{St:_}BL-34379-0
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Max. load capacity
per hinge pair
l1

FA (axial)

FR (radial)
4039.34 lbf (175 N)146 lbf (650 N)
5039.34 lbf (175 N)169 lbf (750 N)
6033.72 lbf (150 N)124 lbf (550 N)

Selected Part

Total (net)
US$116.87
In Stock: 6
In Stock
Please note our quantity discounts (US Dollars).
MinMaxPrice
19US$116.87
1024US$107.13
2549US$97.40
≥ 50US$87.66
Prop 65: Not compliant
WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov
RoHS: Compliant
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).
Weight: 0.588 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
All Prices are in US Dollars. Taxes Not Included.

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Special Requests | Contact our sales team

GN 7231-NI-40-L-MTGN 7231-NI-40-R-MTGN 7231-NI-50-L-MTGN 7231-NI-50-R-MTGN 7231-NI-60-L-MTGN 7231-NI-60-R-MT

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Important: Price Adjustment Announcement

Attention Valued Customer,

Beginning April 14, 2025, we will implement a price adjustment. Some items will have a price decrease, while others will increase. The adjustment helps ensure our commitment to providing our customers with the best products and services.

We will honor current published prices through April 13, 2025.

Customers with pricing agreements will not be effected until annual pricing is reviewed.

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