T-Handle Hex Key Rack (Inch) - Backstage cart lip (one piece, strongest)
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What it holds: Inch T-handle hex keys 5/64-9/64

PRINT SETTINGS
  Filament:  PETG
  Walls:     5
  Infill:    35% gyroid
  Orientation: the files are already oriented for printing. Put them on the plate as they load;
               don't rotate them.

FILES AND SUPPORTS
  - clip_IC_thandle_rack_inch_A.stl  (supports: no)
  - clip_IC_thandle_rack_inch_B.stl  (supports: no)

HOW IT MOUNTS
  BACKSTAGE CART LIP (ONE PIECE, STRONGEST)
    The cart-lip slot is printed into the holder, so it is one piece and as strong as it gets.
    Hold it tilted, hook the slot over the upright lip on the edge of a Magliner / Backstage-style cart
    shelf, and rock it down until it sits flat against the side.

    Notes for this holder: One piece with the native Magliner / Backstage cart lip mount (strongest). M5 heat-set insert + M5 thumbscrew clamps the lip. Rack A (5/64-9/64) and rack B (5/32-1/4) print separately and sit end to end. No ToughBuilt version: the T-handles rest across the rack top and reach about 50 mm back, into the box face above the bar.

HOW IT WORKS
  The 1st AC's T-handles finally stay in order. Nine holes in size order: 5/64, 3/32, 7/64, 1/8 and 9/64 in on rack A (175 mm), then 5/32, 3/16, 7/32 and 1/4 in on rack B (140 mm). Nine keys at a 35 mm pitch would make one rack 310 mm long, taller than the X2D can print standing up, so the set comes as two racks. Hang them end to end on the lip and the 35 mm pitch carries on across the joint. Each size is engraved on the outboard face under its hole.
  Every hole is a hexagon: the key's across-flats size plus 0.3 mm, with a 0.8 mm lead-in. That is less than the step to the next size, so the next bigger key cannot go into a smaller hole, and the hex stops the key turning. Each key drops in at one of six angles: pick the one that points the handle straight out from the cart (across the edge). The holes run about 27 mm deep, so a hanging shaft only swings a couple of degrees and stays clear of the cart side. Ball-end keys pass through the hole without trouble.
  The fit is deliberately close (0.3 mm on the flats). Printed holes usually come out slightly small, so check the smallest key first. If a key binds, run the key itself through the hole a few times. Do not add slicer hole compensation, or the next size up will fit.
  The rack top is flush with the top of the mount block, 42 mm above the deck, and the handles rest across it. The holes are on a 35 mm pitch. With typical 19-24 mm thick T-handle grips, that leaves an 11-16 mm gap between neighbouring grips, enough to get a finger and thumb round one and pull it straight up one-handed. Grip thickness was not measured on a real set, so measure yours. Grips fatter than about 25 mm leave less than 10 mm of finger room.
  With the keys in, the handle ends stick out about 60-75 mm from the cart side, depending on handle length. The rack itself is 28 mm.
  Cart facts

  - Sticks out 28 mm from the cart side (rack only; 9 in T-handle ends reach about 60-75 mm)
  - Hangs 45 mm below the deck (the plate); the shafts of 9 in keys reach about 160 mm below the deck
  - Needs 45 mm of flat cart side below the lip. Anything lower is set 2.5 mm back from the cart and hangs clear
  - Overall 46.0 x 175 x 87 mm; 46.0 x 140 x 87 mm (out x along x up)
  - Nothing of the part sits higher than the 42 mm mount block; the handles rest on top of it, at about 42-65 mm above the deck
  Retention: held by gravity unless you fit the M5 thumbscrew. Press a short M5 heat-set insert (6.4 mm hole, 9 deep) into the deck-side face of the inner flange. A nylon-tipped M5 thumbscrew through it then clamps the lip, so the part cannot lift off on a bump, slide along the lip or rattle. Check first that your lip is at least 16 mm tall.
  Fits: Backstage Equipment and Magliner-style carts with a 3.4 mm upright shelf lip. The mount drops onto the lip from above: 3.7 mm slot (0.3 mm clearance), 26.6 mm deep with a round end, 0.5 mm chamfers at both slot ends.

OTHER MOUNTS
  The same holder also comes Dock (swap between mounts), Mountless (desk, shelf, case or screw to a panel). Pick the mount on the site: https://cart-tools.sdos-placeholder.workers.dev/#ic-thandle-rack-inch-a

TEST THE FIT FIRST
  Carts, bars and tape rolls vary a little. Before a long print, print the small fit test from the
  Test pieces section of the site (or this part at low infill) and check it on your own gear.

Not affiliated with or endorsed by Magliner, Backstage Equipment, ToughBuilt, Milwaukee, Hollyland, Eartec, Sekonic, Inovativ, Matthews or Manfrotto. Brand names only say what a holder fits.
