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Use our Torsion Calculator or the formula below to help determine your optimal configuration.
(lid depth (Fig. 1) x lid weight in pounds) ÷ 2 = Inch-lbs. of support
For best results, choose a combination of hinges that provides as close to your lid's required support as possible (eg. if the formula returned
125 you would use two 60 inch-pound hinges). Hinges are available in 30, 40, and 60 inch-pound ratings.
Note: If three or more hinges are required, the support-capacity of the outside hinges must be the same. Also, the hinge
configuration should be symmetrical.
Installation instructions with JIG IT®
- Attach hinge to lid with 3/4" screws (included). For the lid to be flush with the back of the box, the top of the hinge should be 1-
9/16" from the back edge of the lid. To create an overlay, increase the 1-9/16" dimension by the desired amount of overhang.
Note: Our Lid-Stay Torsion Hinge JIG IT® (23625) lets you to attach the hinge to the lid in seconds, and requires no measuring. Works great for both flush and overlay applications. Fig. 2.
- With all hinges attached to the lid, position the lid on the back of the box. Complete the installation using 1" and 3/4" screws as
shown in the illustration. Fig. 3.
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