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HDS-10S heavy duty lid stay describes a Sugatsune America left-side stay for downward-opening flap doors, so it supports work surfaces or cabinet flaps that pivot down instead of up. This lid supports and down stay component fits within the Work Surface & Tables and Lift Systems, Lid Supports and Stays product class, so it is sized and engineered for flap door applications rather than general hinges. The part is identified as Sugatsune America HDS-10S-HL/BLK, which ties directly to the manufacturer specification when matching to drawings or existing installs. The stay is a black plastic and steel heavy duty unit, combining a metal structure with a black exterior so the hardware provides strength with a dark, unobtrusive appearance on the cabinet interior. Because this version is specified as left, it is intended for the left side in installations that use a handed configuration.
This soft close downward opening stay is described for use with piano, butt, or drop hinges, so it works alongside hinge types such as SDH-001 and SDH-P on a flap door assembly. When pushed to close, the HDS-10S is designed to self close and soft close, so the mechanism takes over near the end of travel and draws the flap into the closed position with a controlled motion. That self close and soft close behavior supports consistent closing of a downward-opening flap door, which matters in installations where a smooth, assisted closing action is desired on work surfaces and flap fronts. Because it is defined as a stay for a downward-opening flap door, its operating geometry is oriented to flaps that open down, which keeps the motion profile aligned with typical drop-front or similar applications.
This downward opening flap door stay is identified as part of Sugatsune Americas lid supports and stays category, so it fits projects that require controlled movement on flap doors within work surfaces and tables. The Web Description notes it is for a downward-opening flap door used with piano, butt, or drop hinges, so it pairs with hinge types such as SDH-001 and SDH-P in flap door assemblies that drop down. By specifying this unit as heavy duty, the product class aligns it with flap doors that need stronger support than light-duty stays, which benefits work surfaces or larger fronts that are expected to carry more weight when open. Because it is used in pairs, the stay layout assigns one unit to each side of the door, so the combined effect shares the weight and motion control across the flap width.
The Web Description gives a torque calculation of Torque = Door Height x 1/2 x Door Weight, so installers can relate flap dimensions and weight to the required torque range for the stay pair. It lists K-Type at 60 to 95 kgf.cm (52 to 82 lbs. inch) per pair, M-Type at 95 to 130 kgf.cm (82 to 112 lbs. inch) per pair, H-Type at 110 to 160 kgf.cm (95 to 138 lbs. inch) per pair, and S-Type at 140 to 180 kgf.cm (121 to 156 lbs. inch) per pair, so different torque bands correspond to door loads and sizes. That defined torque range allows flap designs to be matched to a type whose pair rating aligns with the calculated door torque, which matters when targeting a consistent opening and closing feel across multiple cabinets or stations. Since the stay is used in pairs, the torque values focus on the combined effect of two units, so installers can treat the pair as the working system when mapping out flap performance.
The HDS-10S heavy duty lid stay is for a downward-opening flap door, so it suits doors that swing down to create a front or work surface.
The HDS-10S is designed so that when pushed toward closed, it self closes and soft closes, bringing the flap door shut with a controlled final motion.
The Sugatsune America HDS-10S-HL/BLK is used in pairs, so one stay is installed on each side of the downward-opening flap door.
The downward opening stay is described for use with piano, butt, or drop hinges, specifically noting SDH-001 and SDH-P hinge types in flap door assemblies.
The heavy duty left stay is described as black plastic and steel, so it provides a metal structure with a black exterior appearance on the hardware.
Torque for this lid stay pair uses Torque = Door Height x 1/2 x Door Weight, which is then matched to the K, M, H, or S type torque ranges.
This left handed heavy duty lid stay combines Sugatsune Americas HDS-10S design, soft closing operation, and defined torque ranges, so it slots into downward-opening flap doors that need controlled motion. With use in pairs and compatibility with piano, butt, or drop hinges such as SDH-001 and SDH-P, it ties into typical flap hardware layouts. The black plastic and steel construction delivers a black-finished stay within the Work Surface & Tables and Lid Supports and Stays class, so it aligns with projects needing a dark, heavy duty flap stay solution.