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Print-In-Place Shade Chain Loop Tensioner
This print-in-place tensioner for roller and cellular shades has a 40 mm V-groove pulley (8 mm wide, 4 mm deep). The pulley turns on a 9 mm pin and is held in place by an overhead bridge, with 0.5 mm clearance on every mating face. Two #6 screws (4.5 mm holes) hold it to the frame: one goes through the hollow pin and one through the tab. It keeps a loose bead-chain or cord loop (up to about 5 mm) taut and close to the wall, so a worn clutch is less likely to let the shade droop and children can't pull the loop out.
Print-In-Place Window Restrictor Stay
A print-in-place sliding restrictor stay that limits how far a window sash or door can open: a 136 x 28 x 8 mm slotted arm with a captive Ø10 mm sliding post trapped in an internal T-slot at 0.4 mm clearance, giving 85 mm of travel (screw spacing 58 mm closed, 101 mm at the hard stop). Both mount holes are 4.5 mm for a #8 wood screw or M4, and an integral 1.8 mm leaf-spring detent snaps over the flange near the end of the slot so the window is held at the restricted opening instead of drifting shut.