Automatic telescopic door by Hectafine

The Automatic Telescopic Door solves a problem that standard sliding doors run into constantly: what happens when the architect wants a very wide opening, but the wall on either side simply doesn't have enough depth to pocket a full-width panel? Instead of two panels, a telescopic door uses four or more typically arranged so the rear panel travels at exactly half the speed of the front panel it nests behind, allowing both panels to arrive at the fully-open position together and stack compactly within roughly the depth of a single standard door panel. The practical result is striking: where a conventional sliding door delivers a clear opening of around half the total frame width, a telescopic configuration can push that figure up to roughly two-thirds, all without requiring any additional pocket depth on the wall exactly the kind of engineering refinement specialist manufacturers highlight as the defining advantage of this category.

This makes telescopic doors particularly valuable in two recurring scenarios. The first is new construction with narrow-frontage facades airports, metro stations, and shopping mall entrances where the architect has specified a wide glazed opening but the structural columns or adjacent shopfronts limit how much wall depth is actually available for the door to retract into. The second, just as common in the Indian market, is retrofit and upgrade projects: an existing standard sliding door can often be converted to a telescopic configuration using a telescopic drive kit, instantly increasing the usable clear width of an entrance that's become a bottleneck during peak hours, without the cost and disruption of rebuilding the opening from scratch.

The synchronisation between the front and rear panels is the engineering heart of this door type, and it's worth confirming that the drive and controller are purpose-built for telescopic operation rather than simply a standard sliding mechanism stretched across more panels mismatched timing between panels is the most common cause of premature wear in poorly engineered telescopic systems. Quality telescopic operators are tested against the same DIN 18650 and EN 16005 standards applied across the wider sliding-door family, and typically share the same sensor architecture — obstruction detection, presence sensing, and adjustable speed profiles ensuring the extra panels don't come at the cost of safety or reliability.

For buyers, the key specification steps are confirming the total opening width required, measuring the available pocket depth on site, and deciding between single-side and bi-parting telescopic configurations based on the layout of the facade. For high-footfall public infrastructure and narrow-frontage retail entrances alike, the telescopic door delivers meaningfully more usable width from the same structural opening a small mechanical refinement with an outsized impact on day-to-day pedestrian flow.

• Door Type : 4-panel telescopic (2+2) / multi-panel telescopic, single or bi-parting
• Maximum Panel Weight : Up to 100 kg per panel
• Opening Width : 1200 mm – 4000 mm
• Opening Height : Up to 2700 mm
• Clear Opening Ratio : Up to ~66% of total frame width (vs. ~50% for standard sliding doors)
• Drive Mechanism : Microprocessor-controlled motor with synchronized dual-speed timing-belt drive (rear panel at half front-panel speed)
• Opening Speed : 200 – 800 mm/sec (adjustable, front panel)
• Activation : Motion sensor, radar, push button, access control
• Safety Sensors : Infrared safety beams, presence sensors, anti-collision detection
• Power Supply : 220–240V AC, single phase
• Glazing : 6 mm to 12 mm toughened/laminated safety glass (triple-glazed option for added strength)
• Frame Material : Anodized / powder-coated aluminium
• Certifications : CE / DIN 18650 / ISO 9001 compliant drive units
• Operating Temperature : -15°C to +50°C