HDS-30 right-hand soft-down stay is a Sugatsune America medium duty lid support designed for upward-opening flap doors, so it controls the movement of the panel instead of letting it swing free. It is specified for flap doors that open upward and are mounted with piano, butt, or concealed hinges, which ties the motion control directly to common hinge layouts used in casework and furniture projects. The stay is described as right-hand, so it is selected for installations where the motion control is placed on the right side of the opening when viewed from the front. As a soft-down stay, it is designed to securely latch a flap closed and then hold it in the fully opened position, which keeps the door stable while accessing the interior space. The black finish supports projects where a dark fitting is preferred at the hardware line.
The HDS-30 soft-down stay uses a torque calculation defined as torque equal to door height times one half times door weight, so the door dimensions and weight are directly used to select the correct strength range. The product information identifies torque ranges as K-Type at 140 to 200 kgf.cm per pair, M-Type at 200 to 250 kgf.cm per pair, and H-Type at 250 to 300 kgf.cm per pair, so different door sizes and weights can be matched to an appropriate level within the medium duty concept. The same description clarifies that the torque ranges are also expressed in pounds inch per pair, giving 121 to 173, 173 to 216, and 216 to 260 respectively, so calculations can be aligned with either metric or imperial practices during layout.
The HDS-30 right-hand medium duty soft-down stay is specified for upward-opening flap doors, so it is chosen where the door needs to lift and then stay open rather than swing sideways. The description notes that it is used in pairs, so two stays are applied for a flap within the rated torque range to share the load between both sides. The reference to use with piano, butt, or concealed hinges means it fits projects where those hinge types are already part of the design, such as continuous runs with piano hinges or segment hinges at the ends. Because it is categorized as a lid support and down stay, it suits wall units, overhead compartments, and similar flaps that benefit from a controlled opening motion.
The HDS-30 is described as designed to securely latch a flap closed, so once installed within its torque range it helps keep the door shut until it is operated, which supports clean fronts on cabinets and furniture. The same stay is also described as holding the flap in the fully opened position, so when the door is raised it remains open, keeping hands free while working in the cabinet space. The defined torque calculation based on door height and weight ties the stay performance directly to the actual flap, so door sizing and material weight can be related to the K-Type, M-Type, or H-Type ranges. The individual torque ranges, listed both in kgf.cm and pounds inch per pair, allow the installer or specifier to match the stay selection to the expected door forces in their preferred unit system for repeatable performance on similar projects.
The HDS-30 right-hand medium duty soft-down stay is for upward-opening flap doors, so it suits overhead or lift-up fronts where the panel moves upward and then stays open.
The HDS-30 soft-down stay uses torque equal to door height times one half times door weight, so flap dimensions and weight directly set the required torque range.
The K-Type, M-Type, and H-Type ranges define different torque levels per pair, so upward-opening flap doors of varying size and weight can be matched to suitable performance bands.
The HDS-30 soft-down stay is described for use with piano, butt, or concealed hinges, so it integrates with these common hinge choices on flap door projects.
The HDS-30 soft-down stay is listed as right-hand, so it is selected when the controlled motion hardware is positioned on the right side of the flap opening.
The HDS-30 soft-down stay is designed to securely latch a flap closed and then hold it fully open, so the door remains stable while the interior area is used.
The HDS-30 right-hand soft-down stay from Sugatsune America is presented as a medium duty solution for upward-opening flap doors using piano, butt, or concealed hinges, so it fits many overhead cabinet and flap-front layouts. Its defined torque formula and K-Type, M-Type, and H-Type torque ranges, each stated per pair, tie the stay selection directly to flap height and weight, giving a structured basis for choosing a range. With a role described as securely latching the flap closed and holding it fully open, this black HDS-30MR/BLK stay can be selected where controlled movement and stable open positioning are part of the design goals.