Parametric foldable wall hook

Parametric Wall Hook — 4-part (Pin Hinge, Pull Handle)

A parametric model for MakerWorld: foldable wall hook with a separate, load-bearing hinge pin. Dimensions and ornamentation can be customized online ("Make it Yours"), then the finished files can be downloaded and printed

File: Parametric Wall Hook - 4-part.scad

4 separate parts — all printable flat/standing, without supports:

• Hook (Arm) — movable arm with a through-hole for the pin. 45° saddle notches on the inside (hanger holder) and a wide, rounded grip finger recess at the tip for folding out
• Housing (Holder) — accommodates the arm, has two aligned pin holes in the side walls and the solid back wall as an unfolding stop. At the top, a retaining web on the back wall where the closed tip sits flush and lightly snaps in. Simple; snaps into the outer shell
• Pin — strong, load-bearing axle. Inserted laterally through Housing → Arm → Housing; the ends are covered by the outer shell → cannot fall out
• Outer shell — thin decorative cover with relief → second color. Snaps over the housing, covers the pin ends, and holds the wall mounting

The arm is printed separately and flat (no hinge gap underneath) → the 45° notches and the grip finger recess print cleanly, no spaghetti. The finger recess is open upwards in the print orientation (groove) → fully self-supporting, no supports

Operating Principle

The pivot point is at the bottom. The hook folds upwards to close (flat into the front pocket) and forwards to open — until a heel rests against the solid back wall of the housing as a hard stop (angle via max_open_angle, standard 60°). A hanging load presses the arm against the stop → the hook does not fold shut under load

Opening: unfold the hook at the lowest point of the pivot by pressing with a fingernail. Optionally, also use the wide grip finger recess at the tip with a fingertip

Retained (closed): two small detent nubs on the housing side walls (detent_*) snap into shallow recesses on the hook sides → soft click. Additionally, the upper retaining web (top_seat_*) holds the tip flush against the back wall. Both retaining forces are adjustable so that the hook can be opened easily

Load-bearing pin hinge: The arm rotates on an inserted pin (pin_d, standard 4 mm) that runs through both housing walls. The pin cannot move out sideways because the outer shell covers both ends

Hanger saddle notches (hanger_notches) are designed as 45° V-grooves and print cleanly in a self-supporting manner

Adjustable Parameters (MakerWorld Customizer)

Parameter	Meaning
part	Pull-down: what is output (see below)
hook_width / hook_thick / hook_len	Hook dimensions; housing grows automatically. hook_thick = barrel diameter as well
body_width / body_depth	Minimum outer width / build depth (wall distance)
max_open_angle	Unfolding angle from "closed" (standard 60°)
hanger_notches / notch_depth	Hanger saddle notches (count · depth)
grip_notch_depth / grip_notch_wfrac	Grip finger recess at the tip: depth (mm) · width as a proportion of hook width. Larger = better to grip
detent_enable / detent_grip / detent_pos	Lateral detent nubs (keep closed): on/off · holding strength (0.10 smooth-running … 0.30 tight) · height along hook length (std. 0.65)
top_seat_enable / top_seat_grip / top_seat_pos	Upper retaining web on the back wall: on/off · click strength · start point along hook length
pin_d	Pin diameter (load-bearing, 3.5–5 mm)
pin_play / holder_pin_clear	Arm clearance · holder insertion clearance
cover_wall	Wall thickness housing + outer shell
fit_clear	Press fit housing↔outer shell per side (0.15 mm)
snap_protr	Snap rib outer shell↔housing
use_shell	1 = with decorative shell + snap grooves · 0 = housing circumferentially closed (friction fit/adhesive tape, no grooves)
mount_mode	0 = Adhesive tape · 1 = Countersunk screws through the back wall
relief_*	Outer shell surface relief
arm_relief	Engraving on the front of the hook (on/off)

part selection

Value	Purpose
Preview unfolded / Preview folded	View/Check (assembled)
PRINT Hook	Export only the arm
PRINT Housing	Export only the holder
PRINT Pin	Export only the axle (standing)
PRINT Outer Shell	Export only the decorative cover
PRINT All on Plate	All four parts arranged for printing

Printing in Bambu Studio

All parts are support-free and already oriented for printing. Print orientation of individual parts:

• Hook (Arm) — flat, front side (finger recess, +Y) upwards (the recess is an upward-open groove → self-supporting), the 45° notches (−Y) downwards (print self-supporting). Do not change orientation.
• Housing (Holder) — back wall on the bed, open front + pin holes upwards
• Outer shell — back wall on the bed, open front + relief upwards
• Pin — standing (axis vertical) — see below

The Pin: Print Standing + Brim

The pin is output standing → each layer a clean circle → precise round cross-section = best bearing surface

• Always enable a brim (otherwise it will tip over). Printing slowly also helps
• Chamfer at the top = threading aid, flat bottom = bed adhesion

Load vs. layer lines: When standing, the layer lines are perpendicular to the load (uncritical for a 4mm pin). For maximum shear strength, reorient the pin in the slicer (layer lines parallel to the load) — then a slightly less round cross-section

2 Colors

• Drag multiple parts onto one plate (or PRINT All on Plate) and assign a separate filament to each object — e.g., outer shell in a contrasting color (carrying the relief), hook + housing + pin in a single color
• Without AMS: simply in separate prints — no glue needed thanks to press fit/snap

Recommended Print Settings

Setting	Value
Printer/Nozzle	Bambu Lab (P1S / P2S / H2C), 0.4 mm
Layer height	0.2 mm
Walls / Perimeters	3–4 (hook load-bearing: rather 4)
Infill	20–40 % (hook/pin higher for load)
Supports	OFF
Brim	Pin (standing): recommended, remaining parts optional

Assembly

1. Place arm into housing — align arm bore with the two pin holes
2. Insert pin — laterally through Housing → Arm → Housing (chamfer first). Hinge complete
3. Press housing assembly into outer shell — slide in from the front: Press fit 0.15 mm/side + Snap. The shell covers the pin ends
4. Open — pull out at the wide grip finger recess at the tip with a fingertip (releases the lateral detent nubs and the upper retaining web)
5. Mounting to the wall:
   • mount_mode = 0: double-sided adhesive tape on the flat backside
   • mount_mode = 1: countersunk screws through the two holes in the back wall

Tips

• Does the hook fall out? No — the movement is purely rotation around the pin (the clearance is not an escape path), and the pin ends are covered by the outer shell
• Print without decorative shell? use_shell = 0 → the housing is circumferentially closed (no snap grooves, no thin slots); mounting via friction fit/adhesive tape
• Bearing too stiff / too loose? Adjust pin_play. Pin difficult to insert: increase holder_pin_clear
• Stop angle via max_open_angle (standard 60°). Press fit via fit_clear, snap retention via snap_protr
• Hook too difficult to open? Decrease detent_grip (e.g., 0.10) and/or decrease top_seat_grip. Holds too loosely? Increase both. Position of lateral detent via detent_pos (standard 0.65)
• Finger recess too small to grip? Increase grip_notch_depth and/or grip_notch_wfrac
• More load-bearing pin: Increase pin_d — housing/arm automatically grow with it

 

✅ Print notes
Designed & tested on Bambu Lab (H2C · P2S · P1S) — works on any FDM printer. 

 

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