Print-in-place: rotary dial with 24 detents (compliant arms) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/print-in-place-detent-dial/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design: V-notch detents, compliant arms, 45° V-groove bearing; one designed running gap of 0.40 mm
Catalog version: 2026-10-20

Overall (mm): length 80.0, width 80.0, height 25.7
- 3D print in place — prints already assembled, moving, in one job. Drawn at true size with no printer tolerance added; the 0.40 mm running gaps are part of the design.
- Running gap 0.40 mm per side, 0.80 mm on diameter — part of the design, drawn as is. On the 45° faces the same 0.40 mm is measured square to the face (0.57 mm along the axis).
- Bed: flat. Frame ring and dial both on the bed; in the bottom 6 mm layer the frame bore has 24 V-notches and the dial two thin arms with 45° bumps sitting in opposite notches, 0.40 mm clear.
- Support while printing: over the arms the frame closes as a 45° cone (0.40 mm square to the bumps' top corners), then holds the dial's boss with a 45° V-ridge in a V-groove. Nothing overhangs more than 45°.
- Captured: the V-ridge in the boss's V-groove holds the dial up and down and centres it.
- Freeing it: hold the frame and turn the knob through a full turn each way.
- Motion: continuous rotation both ways with 24 detent positions (15° apart) marked on the frame top; between positions each arm bends 1.5 mm inward as its bump climbs out of a notch. At a detent the dial is free for ±1.05° (computed).

key  value  what
gap_mm  0.4  running gap per side on every moving interface (radial, axial, under captured parts) — part of the design, not a tolerance
frame_od_mm  80.0  
detents  24  positions per turn, every 15°
notch_depth_mm  1.5  45° V notches in the frame bore Ø60
arms  2  flexible detent arms on the dial, 180° apart
arm_mm  1.6 wide × 80° of arc  
arm_flex_mm  1.5  bump travel inward between positions
free_play_deg  1.05  rotation before a bump meets a notch flank, each way
knob_d_mm  51.2  dial boss / knob, pointer slot on top
axial_play_mm  0.57  
height_mm  25.67  as printed
index_marks  24  on the frame top
mount_holes  3 × Ø3.4  frame

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Xem Studio: Print-in-place mechanism design (geometry computed in the generator) — web — Xem Studio design — https://xemstudio.com/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/print-in-place-detent-dial/index.json
API: https://xemstudio.com/api/geometry?object=print-in-place-detent-dial