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HDS-20 left-hand heavy duty stay is a soft-down stay from Sugatsune America designed for top-opening flap doors, so it supports lids that open upward and need controlled downward motion. The stay is categorized as a down stay in the lid supports and stays family, which identifies it as a device that manages the motion of a hinged flap as it closes. HDS-20 is designed to hold the door in the fully opened position, which keeps the flap up and stable while accessing the compartment or work area. The stay is intended for left-hand use, giving installers a dedicated part for left-side applications on flap doors. Its black finish provides a dark hardware option that can visually coordinate with darker casework, work surfaces, or fixtures. As a heavy duty soft-down stay, this model is built for higher torque ranges, so it can support appropriately calculated heavier doors when used correctly.
This Sugatsune America stay is for top-opening flap doors used with piano, butt, or concealed hinges, so it works alongside those hinge types in flap door assemblies. The manufacturer specifies that HDS-20 is used in pairs, which means torque calculations and door support are based on two stays sharing the load. The torque calculation is provided as Torque = Door Height x 1/2 x Door Weight, giving installers a formula for evaluating door size and weight against the stay ranges. Using the stated calculation allows selection within the K-Type, M-Type, or H-Type torque bands so the pair of stays can match the door characteristics. Because the stay is part of the lid supports and stays product class, it works as a motion-control element within the broader work surface and table, lift system, and down stay assemblies described by the category.
This HDS-20 left-hand heavy duty soft-down stay is specified for top-opening flap doors used with piano, butt, or concealed hinges, so it supports lid-style fronts in cabinets, work surfaces, or similar enclosures where the door lifts up. Because it is a down stay classified under lid supports and stays, it links to the hinged edge to manage how the flap rests at full open and how it moves back down. HDS-20 is designed to hold the door in a fully opened position, so once the flap is raised it can remain in that position while the interior is accessed. This behavior is especially relevant wherever frequent access to the compartment is expected and hands-free opening improves workflow around the work surface or storage area.
The HDS-20 stay offers defined torque ranges per pair: K-Type at 140 to 200 kgf.cm (121 to 173 lbs. inch) per pair, M-Type at 200 to 250 kgf.cm (173 to 216 lbs. inch) per pair, and H-Type at 250 to 300 kgf.cm (216 to 260 lbs. inch) per pair. These ranges, combined with the formula Torque = Door Height x 1/2 x Door Weight, provide a direct way to relate door dimensions and mass to the stay capability. By matching the calculated torque to one of these bands when using a pair of HDS-20 stays, the installer can align the heavy duty soft-down action with the actual flap size and weight. The result is that the soft-down stay can support the door in a fully opened position and manage the downward motion within its rated range, which contributes to repeatable operation on flap doors built around piano, butt, or concealed hinges.
The HDS-20 left-hand heavy duty soft-down stay is designed for top-opening flap doors, so it supports lids that open upward and close downward over an opening.
The HDS-20 stay is specified for use with piano, butt, or concealed hinges, so it works alongside those hinge types to control the flap door movement.
The HDS-20 stay is designed to hold the door in the fully opened position, so the flap remains up and stable while accessing the cabinet or compartment.
The HDS-20 stay is described as heavy duty and has defined torque ranges per pair, so it is suited to flap doors whose calculated torque falls within those higher ranges.
For the HDS-20 stay, torque is defined as Torque = Door Height x 1/2 x Door Weight, which ties the flap dimensions and weight directly to the torque ranges per pair.
The HDS-20 stay offers K-Type at 140 to 200 kgf.cm, M-Type at 200 to 250 kgf.cm, and H-Type at 250 to 300 kgf.cm per pair, giving options across several torque ranges.
This HDS-20 left-hand heavy duty soft-down stay from Sugatsune America provides defined torque ranges, a clear torque calculation, and support for top-opening flap doors using piano, butt, or concealed hinges. For projects needing a black stay that holds the door fully open and manages downward motion within the specified torque bands, this model offers a focused option grounded in the stated K-Type, M-Type, and H-Type ranges.