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CFNR

In line lift-off hinge with spring

for automatic return, technopolymer

CFNR-B-D

In line lift-off hinge with spring
Bosses with threaded hole, opening door return

CFNR-B-p-D

In line lift-off hinge with spring
Bosses with threaded hole and threaded studs, opening door return

CFNR-B-p-S

In line lift-off hinge with spring
Bosses with threaded hole and threaded studs, closing door return

CFNR-B-S

In line lift-off hinge with spring
Bosses with threaded hole, closing door return

CFNR-p-B-D

In line lift-off hinge with spring
Threaded studs and bosses with threaded hole, opening door return

CFNR-p-B-S

In line lift-off hinge with spring
Threaded studs and bosses with threaded hole, closing door return

CFNR-p-D

In line lift-off hinge with spring
Threaded studs, opening door return

CFNR-p-S

In line lift-off hinge with spring
Threaded studs, closing door return

CFNR-B-D

In line lift-off hinge with spring
Bosses with threaded hole, opening door return

Material

Glass-fibre reinforced polyamide based (PA) technopolymer, colour black, matte finish.

Pin

AISI 303 stainless steel.

Spring

Stainless steel spring.

Standard executions

Door closing return, left spring winding (see Fig.1):

  • CFNR-B-S: nickel-plated brass bosses with threaded hole.
  • CFNR-p-S: nickel-plated steel threaded studs.
  • CFNR-B-p-S: nickel-plated brass bosses with threaded hole (mounting on jamb side) or nickel-plated steel threaded studs (mounting on door side).
  • CFNR-p-B-S: nickel-plated steel threaded studs, (mounting on jamb side) and nickel-plated brass bosses with threaded hole (mounting on door side).

Door opening return, right spring winding (see Fig.1):

  • CFNR-B-D: nickel-plated brass bosses with threaded hole.
  • CFNR-p-D: nickel-plated steel threaded studs, right spring winding.
  • CFNR-B-p-D: nickel-plated brass bosses with threaded hole (mounting on jamb side) or nickel-plated steel threaded studs (mounting on door side).
  • CFNR-p-B-D: nickel-plated steel threaded studs, (mounting on jamb side) and nickel-plated brass bosses with threaded hole (mounting on door side).

Features

The CFNR hinge has a built-in spring system (Elesa patent) for automatic return of the door when closing or opening.

A pin is fixed in the hinge body which holds a spring in position with a maximum closing or opening return torque of 0.30 Nm at 270°.

The torque varies progressively with the opening/closing angle of the hinge.

In specific fatigue stress tests, the return spring exceeded 15,000 cycles while maintaining the same unaltered torque value.

The maximum weight of the door with two hinges installed which allows the return of the spring is 5Kg. This value is indicative as it is the result of tests carried out on a laboratory structure measuring approximately 0.7 m x 0.7 m.

It is recommended to always check the correct operation for the intended application.

They can be installed on folded sheet metal box doors.

 
 
Resistance tests
Axial StressRadial Stress
____logo__CFNR_par_AXIAL______logo__CFNR_perp_AXIAL______logo__CFNR_par_RADIAL______logo__CFNR_perp_RADIAL__
Parallel planesPerpendicular planesParallel planesPerpendicular planes
Maximum working load
Ea [N]		Maximum working load
Er [N]
600100

The deformation of the hinge at loads higher than the operating ones indicated here are such as to modify the geometry of the hinge itself, compromising its functioning.

Assembly instructions

Based on the position of the jamb with respect to the door and the desired functionality, select the hinges necessary for positions A and B by selecting the correct suffix.

  • Install the hinge body with the rotation pin on the jamb, preloading the hinge by 90° before locking the body on the surface.
  • Use screws to fix the door to the second hinge body.
Jamb positionDesired functionPositioning of hinges
Position APosition B
To the left of the door (Fig.3)Closing spring returnCFNR-D-030CFNR-S-030
Opening spring returnCFNR-S-030CFNR-D-030
To the right of the door (Fig.4)Closing spring returnCFNR-S-030CFNR-D-030
Opening spring returnCFNR-D-030CFNR-S-030
 

Accessories

To facilitate the 90° preloading operation of the hinge and its assembly on the door, it is possible to use the tool MT-CFNR (See Fig.2): which keeps the hinge in the preloaded position during installation.

 

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