Overview

The Ningbo Dimon Trackless Concealed Bi-Fold Door Hardware Kit is an innovative architectural door system engineered for modern residential and commercial interior spaces. Designed specifically for interior passage doors, room dividers, ensuite bathrooms, closets, and laundry pantries, this kit eliminates the need for bottom floor tracks, creating a seamless, threshold-free, and barrier-free transition between rooms. Utilizing a heavy-duty top scissor-linkage mechanism crafted from solid stainless steel and precision aluminum alloy, the door leaves glide smoothly and fold flat against the wall—available in 90° perpendicular fold or 180° full flat opening configurations to maximize clear passage width.

Key Features

• 100% Trackless Barrier-Free Design: Requires zero floor tracks, bottom channels, or exposed floor pins, protecting hardwood, tile, and stone flooring while providing total wheelchair and robot vacuum accessibility.
• 90° and 180° Flat Folding Configurations:
  • 90° Folded: Door leaves fold neatly at a right angle, perfect for standard room corners and enclosed doorways (700mm – 800mm opening).
  • 180° Flat Fold: Door leaves fold completely flat against the adjacent wall, freeing up maximum unobstructed walk-through clearance.
• Precision Scissor-Linkage Top Arm: High-strength multi-joint scissor linkage synchronizes door leaf movement, preventing sagging, binding, or door flutter during motion.
• Anti-Collision Adjustable Limit Stop: Integrated hex-screw angle adjuster fine-tunes the folding angle, preventing door handles or levers from colliding with adjacent door panels or wall surfaces.
• Robust 40kg (88 lbs) Load Capacity: Heavy-gauge solid stainless steel and structural aluminum brackets support single door leaves up to 40 kg (up to 50 kg structural limit).
• Clean Concealed Overhead Installation: Top linkage hardware mounts discreetly above the door head jamb, keeping hardware hidden from standard viewing angles.

Technical Specifications

• Product Type: Trackless Bi-Fold / Multi-Fold Door Hardware Kit
• Material: Heavy-Duty 304 Stainless Steel & Precision Aluminum Alloy
• Finish: Brushed Satin Stainless Steel / Silver
• Maximum Weight Capacity: 40 kg (88 lbs) per leaf (structural limit 50 kg)
• Door Opening Angle: 90° or 180° (Left Outward / Right Inward Opening configurations)
• Applicable Door Opening Width: 700 mm – 800 mm (approx. 27.5" to 31.5")
• Compatible Door Panel Thickness: 35 mm – 45 mm (approx. 1-3/8" to 1-3/4" standard wood doors)
• Compatible Door Material: Solid wood, engineered timber, MDF, and framed composite doors
• Included Accessories: Top scissor linkage arm assembly, top pivot bracket, bottom pivot bracket, hex adjustment wrench, and mounting screws

Wholesale & OEM Capabilities

• Handing & Opening Options: Dedicated Left-Hand and Right-Hand opening sets, and customized linkage arms for wider double-bifold configurations.
• Custom Finishes: Electrostatic Matte Black, Brushed Gold, and Architectural Bronze available for volume developer orders.
• Hardware Matching: Compatible with concealed invisible hinges, magnetic door locks, and flush recessed door pulls.
• Export Packaging: Individually boxed with high-precision installation templates, component checklists, and heavy-duty export master cartons.
• Direct B2B Supply: Factory-direct pricing from Ningbo Dimon, flexible MOQs, OEM branding, and international sea/air freight shipping.