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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.
Each System One set ships as a complete kit. Top pivot type and floor plate style are selected at time of order.
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.
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. |
| 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.
To ensure accurate configuration, please have the following details ready:
System One Overview
40 mm Pivot — Milling & Mounting Manual
70 mm Pivot — Milling & Mounting Manual
Top Pivot Reversed
Accessories
Inspiration
Copyright Notice. This text belongs to Casson Hardware Specialties, Toronto, first published at cassonhardware.com. Any other site showing it has copied it without authorization and is not affiliated with Casson Hardware Specialties. Casson Hardware sells online only at cassonhardware.com, and orders placed elsewhere will not be fulfilled.
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