Hinge technology

Extreme durability and optimum opening and closing properties distinguish ECO door hinges. A unique patented bearing technology ensures that all products always operate smoothly and easily, even under severe stress. The narrow hinges made of modern material as stainless steel is harmoniously integrated into the overall appearance and décor of the door.

Product subgroup

Standards

Materials

Project hinges Horizon – OBX-20 rebated

OBX-20-1531/160

ECO Horizon project hinge OBX-20-1531/160

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-1531/120

ECO Horizon project hinge OBX-20-1531/120

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-1532/160-FD

ECO Horizon project hinge OBX-20-1532/160-FD

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-1532/120-FD

ECO Horizon project hinge OBX-20-1532/120-FD

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-1951/160

ECO Horizon project hinge OBX-20-1951/160

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-1951/120

ECO Horizon project hinge OBX-20-1951/120

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]
Project hinges Horizon – OBX-20 unrebated

OBX-20-2541/160

ECO Horizon project hinge OBX-20-2541/160

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-2541/120

ECO Horizon project hinge OBX-20-2541/120

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-2542/160

ECO Horizon project hinge OBX-20-2542/160

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-20-2542/120

ECO Horizon project hinge OBX-20-2542/120

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]
OBX-18-1531/160 – Project hinges Horizon – OBX-18 rebated

OBX-18-1531/160

ECO Horizon project hinge OBX-18-1531/160

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-18-1531/160 TZ

ECO Horizon project hinge OBX-18-1531/160 TZ (with lifting lug)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  •  [...]

OBX-18-1531/160-RC-A

ECO Horizon project hinge OBX-18-1531/160-RC-A

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-18-1531/160-RC-A TZ

ECO Horizon project hinge OBX-18-1531/160-RC-A TZ (with lifting lug)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection [...]

OBX-18-1531/160-RC-A SI

ECO Horizon project hinge OBX-18-1531/160-RC-A SI (with securing pins)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection [...]

OBX-18-1531/160-RC-B

ECO Horizon project hinge OBX-18-1531/160-RC-B

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection required
  • Wear and [...]

OBX-18-1531/160-RC-B TZ

ECO Horizon project hinge OBX-18-1531/160-RC-B TZ (with lifting lug)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection [...]

OBX-18-1531/160-RC-B SI

ECO Horizon project hinge OBX-18-1531/160-RC-B SI (with securing pins)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis, therefore no pin protection [...]
OBX-18-1531/120 – Project hinges Horizon – OBX-18 rebated

OBX-18-1531/120

ECO Horizon project hinge OBX-18-1531/120

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Perfect [...]

OBX-18-1531/120 TZ

ECO Horizon project hinge OBX-18-1531/120 TZ (with lifting lug)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball [...]

OBX-18-1531/120-RC-A

ECO Horizon project hinge OBX-18-1531/120-RC-A

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Pe [...]

OBX-18-1531/120-RC-A TZ

ECO Horizon project hinge OBX-18-1531/120-RC-A TZ (with lifting lug)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball [...]

OBX-18-1531/120-RC-B

ECO Horizon project hinge OBX-18-1531/120-RC-B

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Pe [...]

OBX-18-1531/120-RC-B TZ

ECO Horizon project hinge OBX-18-1531/120-RC-B TZ (with lifting lug)

  • For rebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball [...]
OBX-18-1532/160-FD – Project hinges Horizon – OBX-18 rebated

OBX-18-1532/160-FD

ECO Horizon project hinge OBX-18-1532/160-FD

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing [...]

OBX-18-1532/160-FD TZ

ECO Horizon project hinge OBX-18-1532/160-FD TZ (with lifting lug)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]

OBX-18-1532/160-FD-RC-A

ECO Horizon project hinge OBX-18-1532/160-FD-RC-A

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing [...]

OBX-18-1532/160-FD-RC-A TZ

ECO Horizon project hinge OBX-18-1532/160-FD-RC-A TZ (with lifting lug)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]

OBX-18-1532/160-FD-RC-A SI

ECO Horizon project hinge OBX-18-1532/160-FD-RC-A SI (with securing pins)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]

OBX-18-1532/160-FD-RC-B

ECO Horizon project hinge OBX-18-1532/160-FD-RC-B

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing [...]

OBX-18-1532/160-FD-RC-B TZ

ECO Horizon project hinge OBX-18-1532/160-FD-RC-B TZ (with lifting lug)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]

OBX-18-1532/160-FD-RC-B SI

ECO Horizon project hinge OBX-18-1532/160-FD-RC-B SI (with securing pins)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]
OBX-18-1532/120-FD – Project hinges Horizon – OBX-18 rebated

OBX-18-1532/120-FD

ECO Horizon project hinge OBX-18-1532/120-FD

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing [...]

OBX-18-1532/120-FD TZ

ECO Horizon project hinge OBX-18-1532/120-FD TZ (with lifting lug)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]

OBX-18-1532/120-FD-RC-A

ECO Horizon project hinge OBX-18-1532/120-FD-RC-A

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing [...]

OBX-18-1532/120-FD-RC-A TZ

ECO Horizon project hinge OBX-18-1532/120-FD-RC-A TZ (with lifting lug)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]

OBX-18-1532/120-FD-RC-B

ECO Horizon project hinge OBX-18-1532/120-FD-RC-B

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing [...]

OBX-18-1532/120-FD-RC-B TZ

ECO Horizon project hinge OBX-18-1532/120-FD-RC-B TZ (with lifting lug)

  • For rebated soundproof doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and [...]
OBX-18-2541/160 – Project hinges Horizon – OBX-18 unrebated

OBX-18-2541/160

ECO Horizon project hinge OBX-18-2541/160

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Perfe [...]

OBX-18-2541/160 TZ

ECO Horizon project hinge OBX-18-2541/160 TZ (with lifting lug)

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball [...]

OBX-18-2541/160-RC-A

ECO Horizon project hinge OBX-18-2541/160-RC-A

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  •  [...]

OBX-18-2541/160-RC-A TZ

ECO Horizon project hinge OBX-18-2541/160-RC-A TZ (with lifting lug)

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free [...]

OBX-18-2541/160-RC-B

ECO Horizon project hinge OBX-18-2541/160-RC-B

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  •  [...]

OBX-18-2541/160-RC-B TZ

ECO Horizon project hinge OBX-18-2541/160-RC-B TZ (with lifting lug)

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free [...]
OBX-18-2541/120 – Project hinges Horizon – OBX-18 unrebated

OBX-18-2541/120

ECO Horizon project hinge OBX-18-2541/120

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Perfe [...]

OBX-18-2541/120 TZ

ECO Horizon project hinge OBX-18-2541/120 TZ (with lifting lug)

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball [...]

OBX-18-2541/120-RC-A

ECO Horizon project hinge OBX-18-2541/120-RC-A

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  •  [...]

OBX-18-2541/120-RC-A TZ

ECO Horizon project hinge OBX-18-2541/120-RC-A TZ (with lifting lug)

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free [...]

OBX-18-2541/120-RC-B

ECO Horizon project hinge OBX-18-2541/120-RC-B

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  •  [...]

OBX-18-2541/120-RC-B TZ

ECO Horizon project hinge OBX-18-2541/120-RC-B TZ (with lifting lug)

  • For unrebated doors on wooden, steel or aluminium frames
  • With OBX adjustable frame box adjustable in three dimensions
  • Inner, firmly rotating axis
  • Wear and maintenance-free [...]
Project hinges Horizon – OBN-20/18 unrebated

OBN-20-4141/160-R

ECO Horizon project hinge OBN-20-4141/160-R round

  • For unrebated doors on upright standing pillars
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right without [...]

OBN-18-4141/160-R

ECO Horizon project hinge OBN-18-4141/160-R round

  • For unrebated doors on upright standing pillars
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right without [...]

OBN-18-4141/120-R

ECO Horizon project hinge OBN-18-4141/120-R round

  • For unrebated doors on upright standing pillars
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right without [...]

OBN-18-4141/120-E

ECO Horizon project hinge OBN-18-4141/120-E edged

  • For unrebated doors on upright standing pillars
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right without [...]
Project hinges Horizon – OBN-14 unrebated

OBN-14-E-C

ECO Horizon project hinge OBN-14-E-C edged C-Shape

  • For unrebated doors wooden or steel frames
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing and patented technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right [...]

OBN-14-E-Z

ECO Horizon project hinge OBN-14-E-Z edged Z-Shape

  • For unrebated doors wooden frames
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing and patented technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right without [...]

OBN-14-R-C

ECO Horizon project hinge OBN-14-R-C round C-Shape

  • For unrebated doors wooden or steel frames
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing and patented technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right [...]

OBN-14-R-Z

ECO Horizon project hinge OBN-14-R-Z round Z-Shape

  • For unrebated doors wooden frames
  • Inner, firmly rotating axis
  • Wear and maintenance-free ball bearing and patented technology
  • Suitable for fire doors
  • Can be used DIN left / DIN right without [...]
OBX-Adjustable frame box / Cover plates / Lifting lug

OBX-3001-3D

ECO Adjustable frame box OBX-3001-3D

  • Adjustable frame box for project hinges OBX in sizes 120 mm and 160 mm
  • For pillar frames with rebated and unrebated doors
  • Adjustable in three dimensions
  • + / - 3 mm Side
  • + / - 3 mm Height
  • + / - 3 mm [...]

OBX-3002-3D

ECO Adjustable frame box OBX-3002-3D

  • Adjustable frame box for project hinges OBX in sizes 120 mm and 160 mm
  • For timber frames with rebated and unrebated doors
  • Adjustable in three dimensions
  • + / - 3 mm Side
  • + / - 3 mm Height
  • + / - 3 mm [...]

OBX-3011/3012-3D

ECO Adjustable frame box OBX-3011/3012-3D

  • Adjustable frame box for project hinges OBX in sizes 120 mm and 160 mm
  • For steel frames with rebated and unrebated doors
  • Adjustable in three dimensions
  • + / - 3 mm Side
  • + / - 3 mm Height
  • + / - 3 mm [...]

OBX 3021-3D

ECO Adjustable frame box OBX-3021-3D

  • Adjustable frame box for project hinges OBX in sizes 120 mm and 160 mm
  • For aluminium frames with rebated and unrebated doors
  • Adjustable in three dimensions
  • + / - 3 mm Side
  • + / - 3 mm Height
  • + / - 3 mm [...]

COVER PLATE OBX-3096

COVER PLATE OBX-3096

Cover plate with square cover and square finish.

COVER PLATE OBX-3097

COVER PLATE OBX-3097

Cover plate with angular cover and round finish.

COVER PLATE OBX-3098

COVER PLATE OBX-3098

Angular cover plate OBX-3098 with square cover plate and square finish.

COVER PLATE OBX-3099

COVER PLATE OBX-3099

Cover plate with a round cover plate and square finish.

Lifting lug

Lifting lug

The use of lifting lugs is recommended for additional stabilization of the hinge - depending on use, construction and load of the door. Lifting lugs relieve the fixing screws and stabilize the hinge parts in the door frame. The lifting [...]

Laser-welded steel hinges

ECO-Genius LHA – Hinge with spring / KO hinge

ECO-Genius LHA – Hinge with spring / KO hinge

three-part standard hinge to be welded on, adjustable in height (±3 mm) EN 1935: Class 12 / 80 (100) kg

Description: ECO spring hinge / KO hinge set adjustable in height.

Spring hinge: based on DIN [...]

ECO-Genius LHA – Hinge with spring

ECO-Genius LHA – Hinge with spring

three-part standard hinge to be welded on, adjustable in height (±3 mm) EN 1935: Class 12 / 80 (100) kg

Description: ECO spring hinge / KO hinge set adjustable in height.

Spring hinge: based on DIN 18272

KO-hi [...]

ECO-Genius LHA – KO hinge

ECO-Genius LHA – KO hinge

three-part standard hinge to be welded on, adjustable in height (±3 mm) EN 1935: Class 12 / 80 (100) kg

Description: ECO spring hinge / KO hinge set adjustable in height.

Spring hinge: based on DIN 18272

KO-hinge: acc. [...]

ECO-Standard-SET (3 mm) – Hinge with spring / KO hinge

ECO-Standard-SET (3 mm) – Hinge with spring / KO hinge

three-part standard hinge to be welded on, (3 mm) EN 1935: Class 12 / 80 (100) kg

Description: ECO spring hinge / KO hinge set.

Spring hinge: based on DIN 18272

KO-hinge: acc. EN 1935

Moun [...]

ECO-Standard-SET (3 mm) – Hinge with spring

ECO-Standard-SET (3 mm) – Hinge with spring

three-part standard hinge to be welded on, (3 mm) EN 1935: Class 12 / 80 (100) kg

Description: ECO spring hinge / KO hinge set.

Spring hinge: based on DIN 18272

KO-hinge: acc. EN 1935

Mounting: Easy [...]

ECO-Standard-SET (3 mm) – KO hinge

ECO-Standard-SET (3 mm) – KO hinge

three-part standard hinge to be welded on, (3 mm) EN 1935: Class 12 / 80 (100) kg

Description: ECO spring hinge / KO hinge set.

Spring hinge: based on DIN 18272

KO-hinge: acc. EN 1935

Mounting: Easy mounting [...]

ECO-Standard-SET (4 mm) – Hinge with spring / KO hinge

ECO-Standard-SET (4 mm) – Hinge with spring / KO hinge

three-part standard hinge to be welded on, (4 mm) EN 1935: Class 13 / 80 (120) kg

Description: ECO spring hinge / KO hinge set

Spring hinge: based on DIN 18272

KO-hinge: acc. EN 1935

Moun [...]

ECO-Standard-SET (4 mm) – Hinge with spring

ECO-Standard-SET (4 mm) – Hinge with spring

three-part standard hinge to be welded on, (4 mm) EN 1935: Class 13 / 80 (120) kg

Description: ECO spring hinge / KO hinge set

Spring hinge: based on DIN 18272

KO-hinge: acc. EN 1935

Mounting: Easy [...]

ECO-Standard-SET (4 mm) – KO hinge

ECO-Standard-SET (4 mm) – KO hinge

three-part standard hinge to be welded on, (4 mm) EN 1935: Class 13 / 80 (120) kg

Description: ECO spring hinge / KO hinge set

Spring hinge: based on DIN 18272

KO-hinge: acc. EN 1935

Mounting: Easy mounting [...]

Accessories

Locking pin

Locking pin

Tensioning and fixing of spring hinges

Fire-protection doors are equipped with one spring hinge and one KO hinge. In order to dismantle the door leaf, the hinge bolts have to be expelled to the door centre. When spring hinge is on [...]

Spring pin

Spring pin

Tensioning and fixing of spring hinges

Fire-protection doors are equipped with one spring hinge and one KO hinge. In order to dismantle the door leaf, the hinge bolts have to be expelled to the door centre. When spring hinge is on [...]