HDS-30 right-hand soft-down stay is a light-duty down stay from Sugatsune America designed for upward-opening flap doors, so it supports doors that swing up instead of out, which keeps the opening path clear on wall cabinets and similar projects. This stay is used for upward-opening flap doors that are hinged with piano, butt, or concealed hinges, so it works alongside the hinge set to control motion rather than replacing the hinges. The HDS-30 is designed to securely latch a flap closed, which holds the door shut at rest and helps keep fronts aligned in everyday use. It is also designed to hold the door in the fully opened position, which keeps the flap up and out of the way while accessing the interior without having to hold the door.
The HDS-30 light duty soft-down stay uses a torque-based selection approach, where the door height and weight determine the required type, so the motion control can be matched to the specific flap size. The torque calculation given for this stay is Torque = Door Height x 1/2 x Door Weight, which turns the door dimensions into a sizing value that can be compared to the stated torque ranges. Three torque groupings are provided as K-Type, M-Type, and H-Type, each defined by a torque range per pair, so the installer can align the flap door torque value with one of these groups when planning hardware.
This soft-down stay is described as a light duty down stay for upward-opening flap doors, so it fits lighter doors where controlled opening and closing are expected rather than heavy lid support. Because it is used for upward-opening flap doors with piano, butt, or concealed hinges, it is suited to wall cabinets, overhead compartments, or similar lift-up fronts built around those hinge types. The right-hand configuration focuses this model on applications where the motion hardware is arranged on the right side in the design, so the overall layout can be coordinated with the interior of the cabinet. The stay is intended for use in pairs, so it is applied symmetrically on a flap to share the operating load between two stays, which supports smoother action on wider doors.
The stated torque calculation, Torque = Door Height x 1/2 x Door Weight, provides a direct link between the actual flap size and the required motion capacity, so installers can evaluate doors using concrete dimensions. K-Type is identified with a torque range of 140 to 200 kgf.cm, or 121 to 173 lbs. inch per pair, so flap doors whose calculated torque falls in this band can be matched to K-Type when planning motion behavior. M-Type is listed at 200 to 250 kgf.cm, or 173 to 216 lbs. inch per pair, which covers a higher torque window for somewhat heavier or taller flap doors using the same calculation. H-Type is listed at 250 to 300 kgf.cm, or 216 to 260 lbs. inch per pair, so this group addresses flap doors with the highest torque values in the light duty range, keeping the soft-down action within the stay's stated operating band.
The HDS-30 right-hand soft-down stay is for upward-opening flap doors, so it supports doors that pivot up from the bottom edge rather than swinging like standard cabinet doors.
The HDS-30 torque is based on Torque = Door Height x 1/2 x Door Weight, which converts door size and weight into a torque value that can be matched to a torque range.
The HDS-30 soft-down stay is used in pairs so two stays share the operating load on the flap door, helping distribute motion control across the width of the door.
This upward-opening flap door stay is designed to work with piano, butt, or concealed hinges, so it can be integrated with several common hinge styles in cabinet projects.
The HDS-30 is described as light duty, indicating it is intended for flap doors whose torque values fall within the specified light-duty torque ranges for K-Type, M-Type, or H-Type.
The HDS-30 latching feature is designed to securely latch a flap closed, which keeps the door shut when at rest and helps maintain a consistent front alignment.
The HDS-30 right-hand light duty soft-down stay in black, manufacturer part HDS-30KR/BLK from Sugatsune America, is defined for upward-opening flap doors that use piano, butt, or concealed hinges, so it aligns with common cabinet layouts. Its design to securely latch a flap closed and hold it in the fully opened position supports both closed-door alignment and hands-free access. Using the given torque calculation and the K-Type, M-Type, and H-Type torque ranges per pair ties flap door size directly to stay selection, which helps match motion control to each project requirement.