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CFNR

In line lift-off hinge with spring

for automatic return, technopolymer

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CFNR-B

In line lift-off hinge with spring

Bosses with threaded hole

CFNR-p

In line lift-off hinge with spring

Threaded studs

CFNR-B-p

In line lift-off hinge with spring

Bosses with threaded hole and threaded studs

CFNR-p-B

In line lift-off hinge with spring

Threaded studs and bosses with threaded hole

Description

Main specifications

Material

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

AISI 303 stainless steel.

Spring

Stainless steel spring.

Standard executions

CFNR-B: nickel-plated brass bosses with threaded hole.

CFNR-p: nickel-plated steel threaded studs.

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

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

Suffix to indicate the required functionality (return on closing or opening depending on spring type and hinge positioning, see fig.1):

S: left spring winding.

D: right spring winding.

General information

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 Stress		Radial Stress

Parallel planes	Perpendicular planes	Parallel planes	Perpendicular planes
Maximum working load Ea [N]		Maximum working load Er [N]
600		100

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.

Instructions of use

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 position	Desired function	Positioning of hinges
Jamb position	Desired function	Position A	Position B
To the left of the door (Fig.3)	Closing spring return	CFNR-D-030	CFNR-S-030
To the left of the door (Fig.3)	Opening spring return	CFNR-S-030	CFNR-D-030
To the right of the door (Fig.4)	Closing spring return	CFNR-S-030	CFNR-D-030
To the right of the door (Fig.4)	Opening spring return	CFNR-D-030	CFNR-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.