Spring Assist Hinge (HG-PA270-45)

This external surface-mounted Sugatsune spring assist hinge (Product No. HG-PA270-45) provides a power assist to help users open heavy lids more easily, while also ensuring that the lid closes smoothly and never slams shut.

This hinge provides 45 Nm (459 kgf-cm) of torque, making it a very heavy-duty hinge capable of handling large lids or doors, including in commercial or industrial applications. As with all Sugatsune products, the construction is precision-engineered for a long service life of superior performance for the end user.

HG-PA270-45 Spring Assist Hinge Technical Details

  • Easily open heavy lids or doors, and close them gently and smoothly.
  • Designed for upward-opening applications.
  • Mounts to the external surface.
  • Lift-assist / damper torque is 45 Nm (459 kgf-cm), guaranteed within 10%.
  • Torque is adjustable (+/-5%) through manipulation of the torque adjustment screw.
  • Hinge opens to 100 degrees, with torque assistance up to 90 degrees.
  • Product dimensions are 274 × 182 × 56 mm; weight 2500 grams.
  • Steel spring is SWO grade; hinge body is stainless steel 430 grade.
  • Hinge includes a smooth plastic cover for a neutral, clean overall appearance.

See Installation Manual.


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For generations, Sugatsune has been proud to serve architects, contractors, project managers, and others in their building and remodeling projects. We design new components in response to the needs of our customers and have built up a large offering over the years, so take a few moments to browse our entire product catalog to see our complete range of hardware offerings and find inspirations for your next project.

Visit our lift-assist hinges page to see other spring assist hinges. For help finding the right components, or for product advice, contact our technical support team. We look forward to assisting you!

Weight 2500 g
Dimensions 274 × 182 × 56 mm
Damper Torque (kgf-cm)


Damper Torque (lbs-in)


Max. Opening Angle (degree)


Mounting Type

Surface Mount

Overall Length (mm) Width (mm) Height (mm) Weight (g)
274 mm 56 mm 182 mm 2,500 g


Component Material Finish
Base A/B 430 Stainless Steel Plain
Case 430 Stainless Steel Plain
Plastic Cover A/B PBT Plastic Light Gray
Slider Polyacetal
Spring Steel

Certain CAD files are not available for download from our website. Please email us at support@sugatsune.com with the product name and desired file format and we can email it to you.