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Soft Down Stay Top Opening describes this Sugatsune America HDS-20S/HR-BL lid support, which is a right-hand soft down stay for a top-opening flap door. It works with piano, butt, or concealed hinges, so it suits a range of hinge layouts in casework and built-ins. The stay is part of the Lid Supports and Stays product class, so it is intended to control how a lid or flap moves as it opens and closes. The H-type rating of 70 to 110 kgf.cm per pair defines its working torque range, which helps match the hardware to your specific door size and weight. This model is designed to hold the door in the fully opened position, so the flap stays up during use. The black plastic and steel construction provides a discrete, dark finish that blends with many case interiors.
This Sugatsune HDS-20S/HR-BL stay is used in pairs on a top-opening flap door, so planning assumes two stays working together on the same door. The specified torque calculation of Torque = Door Height x 1/2 x Door Weight provides the formula to determine the door torque. That value can then be compared to the H-type torque window of 70 to 110 kgf.cm per pair, aligning the flap design with the stay's working range. Because it is a right-hand model, orientation matters when laying out the pair on the cabinet. Using a lid support from the Lid Supports and Stays class keeps the motion controlled, which helps manage the movement of a top-opening surface in everyday use.
This H-type soft down stay is for top-opening flap doors, so it fits cabinets and enclosures where the door lifts upward from the front edge. Being compatible with piano, butt, or concealed hinges means it can be applied to storage lids, work surface covers, or overhead flap doors that already rely on those hinge formats. Because the product is in the Work Surface & Tables and Lid Supports and Stays categories, it suits projects where a horizontal or near-horizontal surface needs controlled motion as it opens. Using the stay in pairs distributes the load across two supports, which is important for maintaining motion control over the full width of the door. The right-hand configuration directs placement along one side of the opening, so the matching left-hand unit balances the assembly on the opposite side.
The stated H-type torque range of 70 to 110 kgf.cm per pair defines how much door torque this model is designed to handle, which helps align door height and weight with the hardware's capability. The torque formula, Torque = Door Height x 1/2 x Door Weight, turns basic door dimensions into a working number that can be compared against that range, supporting accurate selection within the HDS family. With the lid self opening past the free stop angle, the door continues its travel once it crosses that point, helping it reach the fully opened position without requiring constant lifting force near the end of travel. The HDS-20S design holds the door in the fully opened position, which stabilizes the flap during access to stored items or work surfaces beneath. Combining plastic and steel in a black finish provides a functional mechanism with a dark appearance that suits many interior cabinet designs.
The HDS-20S/HR-BL is designed for a top-opening flap door, so it supports lids or flaps that lift upward rather than swinging sideways.
The HDS-20S/HR-BL uses the torque formula: Torque = Door Height x 1/2 x Door Weight, which translates door size and weight into a usable torque value.
This H-type version is rated for 70 to 110 kgf.cm per pair, which matches doors whose calculated torque falls within that window.
The HDS-20S design is specified to hold the door in the fully opened position, keeping the flap up while the interior is accessed.
With this stay, the lid will self open past the free stop angle, so once it crosses that point it continues toward fully open without extra lifting near the end.
The HDS-20S/HR-BL is described for use with piano, butt, or concealed hinges, so it cooperates with those hinge styles on top-opening flaps.
The Sugatsune HDS-20S/HR-BL soft down stay provides controlled motion for a top-opening flap door using piano, butt, or concealed hinges. Its H-type torque rating of 70 to 110 kgf.cm per pair helps match the stay to your door height and weight. Because HDS-20S holds the door fully open and lets the lid self open past the free stop angle, it supports stable, predictable access to the space beneath the flap. For trade work on work surfaces, tables, or cabinet lids that need upward-opening control, this right-hand black plastic and steel stay aligns flap design with defined torque performance.