The FritsJurgens System One is a concealed pivot hinge system for narrow-profile pivot doors. At just 18 mm in height, the bottom pivot installs entirely within the door, leaving the face clean. The system provides 360° free-swing rotation with no hold positions and no self-closing mechanism, and supports door weights up to 500 kg. Compatible with door frames for single-acting applications.

Available in three configurations: 70 mm (pivot point adjustable from 70 mm to center), 40 mm (pivot point fixed at 40 mm), and Top Pivot Reversed (TP-R). All versions are Class G only and support doors up to 500 kg.

What's Included

Each System One set ships as a complete kit. Top pivot type and floor plate style are selected at time of order.

Bottom pivot — installed inside the door; controls rotation
Top pivot (Regular, Cable Grommet, or Reversed) — anchors the door between floor and ceiling
Ceiling plate — receives the top pivot pin (standard top pivot) or Receiver — milled into top of door (Top Pivot Reversed)
Floor plate — supports the door at the base; surface-mounted or recessed into the sill

Configuration

70 mm: Pivot point adjustable from 70 mm from the door edge to center placement. Compatible with Top Pivot 70 mm Class G. No cover plates on the bottom pivot.
40 mm: Pivot point fixed at 40 mm from the door edge. Compatible with Top Pivot 40 mm Class G. Cover plates available in stainless steel or black.
Top Pivot Reversed (TP-R): Pivot mechanism mounted in the head jamb or ceiling instead of the top of the door. Only a small receiver is milled into the door's top edge, allowing thinner frames and larger glass openings. Cover plates are magnetic and available in stainless steel, black, or white.

Top Pivots

The top pivot anchors the door to the ceiling or head jamb. System One is compatible with three top pivot types — choose based on your installation conditions and door design.

Top Pivot	Installed In	Best For	Cable Entry
Top Pivot Regular	Top of door	Standard installations — narrow-profile pivot doors with a ceiling plate above	No
Top Pivot Cable Grommet	Top of door	Doors requiring wiring for integrated lighting, electronic locks, or access control. Ø7.5 mm cable passage.	Yes
Top Pivot Reversed (TP-R)	Head jamb or ceiling	Glass doors requiring minimal frame width; exterior doors with a head jamb; middle-placement doors where ceiling-side adjustment is preferred	Yes (standard)

With Top Pivot Reversed, no system needs to be housed in the top of the door — only a small receiver is milled into the door's top edge. This allows thinner frames and larger glass openings, which pairs naturally with System One's minimal 18 mm bottom pivot. The TP-R pin rotates downward into the receiver during installation, and all adjustment is done from inside the door opening. Cover plates are magnetic and available in stainless steel, black, or white.

Floor Plate Options

All floor plates mount 8 mm into the floor and are compatible with underfloor heating. Surface-mounted plates sit on top of the floor with short anchor pins. Flush/inset plates recess into the sill and are required when drop seals are used.

Round	Ø80 × 9 mm. Surface-mounted. Radial adjustment ±2.5°. Stainless steel or black.
Square	80 × 40 × 9 mm. Surface-mounted. Stainless steel or black.
Round Inset Flush	80 × 40 × 11 mm. Recessed into sill. No radial adjustment. Stainless steel only.
Square Inset Flush	80 × 40 × 11 mm. Recessed into sill. No radial adjustment. Stainless steel only.

Installation Clearances

Top gap: 4–10 mm (ceiling to top of door)
Bottom gap: 11 mm with surface-mounted floor plates; 7 mm with flush/recessed floor plates
Side gaps: Variable — dependent on door thickness, door width, and pivot point position. Calculate project-specific dimensions at fritsjurgens.com/gap-calculator.

Materials

Hardened stainless steel and anodized aluminum
Finishes: Stainless steel; Black PVD coated stainless steel (surface-mounted floor plates only)

Technical Specifications

Bottom pivot height	18 mm
System weight	0.36 kg
Bottom pivot dimensions — 70 mm	162 × 32 × 18 mm
Bottom pivot dimensions — 40 mm	140 × 32 × 85 mm
Top pivot dimensions — 70 mm Class G	171.5 × 32 × 44 mm
Top pivot dimensions — 40 mm Class G	151.5 × 32 × 85 mm
Top Pivot Reversed (TP-R)	240 mm width; mortised to same depth as 70 mm/40 mm top pivots; min. backset 130 mm
Pivot point — 70 mm	Adjustable, 70 mm from edge to center
Pivot point — 40 mm	Fixed at 40 mm from edge
Door weight capacity	Up to 500 kg (Class G)
Door acting	Revolving (360°), double-acting (180°), single-acting (90°)
Hold positions	None
Self-closing	No
Min. door thickness	40 mm
Floor penetration	8 mm
Ceiling penetration	18 mm
Top gap	4–10 mm
Bottom gap	7 mm (flush plates) / 11 mm (surface plates)
Pin diameter	Ø15 mm
Cable grommet	Ø7.5 mm (Cable Grommet top pivot)
Guarantee	2 years

Milling space required in the door is always larger than the component footprint. Refer to FritsJurgens milling drawings before fabrication. Side gap dimensions must be calculated per project using the Gap Calculator linked above.

Order Guide

To ensure accurate configuration, please have the following details ready:

Configuration: 40 mm Backset, 70 mm Backset, or Top Pivot Reversed (TP-R)
Door weight (System One is Class G only — supports up to 500 kg)
Door width and height
Door thickness (minimum 40 mm)
Door material
Top pivot type: Regular, Cable Grommet, or Reversed
Floor plate: Round, Square, Flush Round, or Flush Square
Finish: Stainless Steel or Black

Product Downloads

System One Overview

40 mm Pivot — Milling & Mounting Manual

Class G (up to 500 kg / 1,102 lbs)

70 mm Pivot — Milling & Mounting Manual

Class G (up to 500 kg / 1,102 lbs)

Top Pivot Reversed

Accessories

Inspiration

FritsJurgens Inspiration Catalog 2026

Supplier: FritsJurgens

FritsJurgens System One Pivot Hinge Set