Print-in-place: three-stage telescoping tube with stops (Ø40) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/print-in-place-telescoping-tube/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design: revolved profiles; 45° flanges and lips; one designed running gap of 0.40 mm
Catalog version: 2026-10-20

Overall (mm): length 40.0, width 40.0, height 68.0
- 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: the three tubes stand nested, coaxial, all on their bottom ends.
- Support while printing: every lip and flange is a 45° diamond or wedge: the inward lips of tubes 1 and 2 have 45° undersides, the outward flanges of tubes 2 and 3 have 45° undersides and tops. Tubes are open both ends; nothing overhangs more than 45°.
- Captured both ways: each inner tube's flange (reach 1.6 mm) sits between the outer tube's bottom lip and top lip, so it can neither drop out of the bottom nor pull out of the top.
- Freeing it: hold the outer tube, pull the inner tube up a few millimetres and push it back; then the middle one; turn each a little.
- Motion: stage 1 slides 50.8 mm, stage 2 54.8 mm (computed to the flange-on-lip stop): 68 mm collapsed, 173.6 mm extended. Each tube also turns freely in the next.

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
tube_1_od_mm  40.0  outer tube
tube_2_od_mm  32.0  middle tube
tube_3_od_mm  24.0  inner tube
wall_mm  2.0  every tube
tube_1_h_mm  60.0  
tube_2_h_mm  64.0  
tube_3_h_mm  68.0  
lip_reach_mm  1.6  radial overlap of each flange behind its lip
travel_1_mm  50.8  tube 2 out of tube 1, drawn (collapsed) to flange-on-lip stop
travel_2_mm  54.79  tube 3 out of tube 2
length_collapsed_mm  68.0  as printed
length_extended_mm  173.59  all stages out to their stops
bottom_play_mm  1.98  each tube can drop this far below the drawn position before its flange sits on the lower lip

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, 4 parts): https://xemstudio.com/files/hardware/print-in-place-telescoping-tube/index.json
API: https://xemstudio.com/api/geometry?object=print-in-place-telescoping-tube