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HDS-10S-MR/BLK lid stay is a Sugatsune America medium duty stay for a downward-opening flap door on work surfaces, tables, or cabinets, so flap fronts can open down in a controlled way. The stay is designed for use on downward-opening flap doors with piano, butt, or drop hinges, which lets you pair it with common hinge styles used on fold-down fronts and service doors. This model is a right-hand version in black plastic and steel, so it visually matches dark hardware while using steel where load handling is required. The HDS-10S lid stay is designed to self close and soft close when the flap is pushed toward the cabinet, so the door is pulled in smoothly instead of slamming. The stay is used in pairs, which spreads the load across both sides of the flap for more even support in medium duty applications.
This Sugatsune America medium duty stay works with downward-opening flap doors, so layout focuses on the flap height and weight rather than a lift-up motion. The torque calculation is defined as: Torque = Door Height x 1/2 x Door Weight, which gives a direct way to relate the door size and mass to the torque range of each stay type. The HDS series defines K-Type, M-Type, H-Type, and S-Type torque ranges per pair, so the selected pair can be matched to the door torque calculation for medium duty service. Using the stay with piano, butt, or drop hinges means the hinge line is already established, and the stay then manages motion along that axis, helping the flap open down and return softly when pushed closed.
This lid stay is for a downward-opening flap door, so it fits installations where the door height and weight produce a torque that sits within one of the stated ranges per pair. The K-Type range is 60 to 95 kgf.cm (52 to 82 lbs. inch) per pair, so it suits lighter flaps within that medium duty band. The M-Type range is 95 to 130 kgf.cm (82 to 112 lbs. inch) per pair, so it supports heavier fronts within the mid-range of the series. The H-Type range is 110 to 160 kgf.cm (95 to 138 lbs. inch) per pair, serving higher torque doors that still fall in medium duty use. The S-Type range is 140 to 180 kgf.cm (121 to 156 lbs. inch) per pair, covering the upper end of the medium torque spectrum.
The torque formula Torque = Door Height x 1/2 x Door Weight ties flap dimensions directly to the K-Type, M-Type, H-Type, and S-Type ranges, so the stay selection can follow a defined calculation instead of guesswork. When the calculated torque falls between 60 and 95 kgf.cm per pair, the K-Type range gives the functional window, which aligns door performance with the stay capability. For torque between 95 and 130 kgf.cm per pair, the M-Type range defines the working band, helping the flap operate within the intended self-closing force. With torque between 110 and 160 kgf.cm per pair, the H-Type range keeps the closing action within the rated values, supporting consistent motion on heavier fronts. For torque in the 140 to 180 kgf.cm per pair band, the S-Type range supports higher loads while still retaining the self close and soft close behavior described for the HDS-10S system.
This lid stay is for a downward-opening flap door, so it works where the door swings down to open rather than lifting up.
The HDS-10S is designed to self close and soft close when the flap is pushed, so the door is pulled in gently and impact at the frame is reduced.
This stay is used with piano, butt, or drop hinges, so it matches common hinge choices along the flap edge.
The torque formula Torque = Door Height x 1/2 x Door Weight links door size and weight to the HDS torque ranges, guiding selection for proper medium duty performance.
K-Type covers 60 to 95 kgf.cm (52 to 82 lbs. inch) per pair, while M-Type covers 95 to 130 kgf.cm (82 to 112 lbs. inch) per pair for medium duty flap doors.
H-Type supports 110 to 160 kgf.cm (95 to 138 lbs. inch) per pair, and S-Type supports 140 to 180 kgf.cm (121 to 156 lbs. inch) per pair for heavier medium duty doors.
This Sugatsune America HDS-10S-MR/BLK lid stay is a right-hand, medium duty solution for downward-opening flap doors using piano, butt, or drop hinges, so it aligns with common hinge layouts on work surfaces and tables. The defined torque formula and K-Type, M-Type, H-Type, and S-Type ranges give a structured path to match flap height and weight to stay capability. The self close and soft close function when pushed supports controlled movement on active fronts where quieter, managed closing benefits the installation. For projects needing a black plastic and steel right-hand stay used in pairs on downward-opening flaps, this configuration aligns the motion profile with the described torque windows.