1 in Tape Dispenser with Cutter - Backstage cart lip (one piece, strongest)
======================================================================

What it holds: 1 roll of 1 in tape (or 1/2 in spike), desk-style cutter, cap parking slot

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_AC_tape_1x1in_cutter.stl  (supports: no)
  - clip_AK_tape_lock_cap.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: Native one-piece Magliner / cart lip mount (strongest). Crush ribs + optional M5 thumbscrew insert; cap parks in the slot on top. Print the lock cap too.

HOW IT WORKS
  A desk tape dispenser for the cart edge. It holds one roll of 1 in tape (paper, artist, 1 in gaffer, or 1/2 in spike) on a 3 in core. Print one per colour.
  The cutter works like a desk tape dispenser: the tape goes round a smooth guide bar, lies sticky side down on a flat pad, and ends at a row of sawtooth teeth that point up. The guide bar and the pad are solid arms rooted in the back of the holder, not a thin fin. Teeth: 2 mm pitch, 60 deg points, printed flat on the bed.
  How to change a roll (stand facing the cap)
  1. Twist the cap (orange in the pictures) anticlockwise to the stop, a quarter turn. Its slot is now lined up with the bar on the end of the spindle. Pull it off and park it: stand it on its edge in the slot on top of the holder and push it down. It stays there, out of the way of the roll, so it can't get lost.
  2. Slide the roll on, all the way back to the flange. Hold it so the tape comes off the RIGHT-hand side of the roll going down, towards the cutter. It goes on with a light rub: that is the drag leaf doing its job. Take the tape end down on the inside of the round guide bar, under it, and out across the flat pad, sticky side down, so the end lies over the teeth. The gap is open at the cap end, so the tape slides in from the side.
  3. Unpark the cap, push it on with its slot over the bar, and twist it clockwise until it clicks (a quarter turn). It only turns that way. Pulling tape turns the roll the same way, so the roll can only push the cap tighter, never loosen it.
  How to tear tape
  1. Pinch the end at the teeth and pull the tape out sideways (away from the roll, along the cart) and a little down, as long as you need.
  2. Snap it straight down over the teeth. It tears clean, one-handed. Tearing pulls the holder down onto the lip, not up off it.
  3. The new end stays stuck on the pad at the teeth, sticky side down, ready for the next grab. It cannot flap: it sits under the guide bar, and the pull from the roll goes round the bar, not onto the end.
  Why the tape stays put

  - The roll is locked on by the bar on the spindle end, not by a little bump. The cap clicks into place at a quarter turn and has hard stops, so it cannot turn on past the lock.
  - One flexible leaf along the spindle rubs the inside of the core. That gives light drag, so a yank does not spin the roll and dump a loop of tape, but it still turns smoothly.
  - The cap has its own parking slot on top of the holder, behind the roll. While you change a roll, the cap stands in it on its edge: gravity and a small crush rib hold it, and it is nowhere near the roll's path. No cord to tangle in the roll.
  Fits: Backstage Equipment and Magliner-style carts with a 3.4 mm upright shelf lip. The holder drops straight down onto the lip. The slot is 3.7 mm (26.6 mm deep, round end, 0.5 mm chamfered ends), and two small crush ribs make it 3.3 mm where they are, so it pushes on snug.
  Lock it to the cart: held by gravity unless you fit the M5 thumbscrew. Tearing pulls straight down and seats the holder, but pulling tape out pulls sideways. Gaff takes a firm pull, so fit the thumbscrew for gaff, and on any cart where the holder lifts or slides along the lip when you pull. Melt an M5 short heat-set insert (6.4 mm hole, 9 mm deep) into the bore on the shelf-side face and turn a nylon-tipped M5 x 16-20 thumbscrew in until it clamps the lip. The screw sits 13 mm above the deck, so your lip must be at least 16 mm tall.
  Numbers to check against your cart

  - Sticks out from the cart side: 58 mm with the cap on (doorway width)
  - Hangs below the deck: 135 mm to the bottom of the cutter (the teeth are at 121 mm). A full 172 mm roll reaches 111 mm below the deck and 61 mm above it
  - Flat cart side needed below the lip: 80 mm. The back plate bears there; the cutter root below it stands 2 mm off the cart, so the cart does not need to be flat lower down
  - Cutter side: the cutter and the tape are on the right as you face the cap. Leave about 40 mm clear on that side of the holder for your hand
  - Spacing: at least 177 mm centre to centre if you run full rolls side by side
  - Rolls: 3 in (76.2 mm) cores, up to 172 mm across. A full 60 yd roll of 2 in cloth gaff (11-12 mil) is about 165-170 mm; a 60 yd roll of 1 in paper tape is about 135-140 mm
  - Retention on the cart: held by gravity unless you fit the M5 thumbscrew

OTHER MOUNTS
  The same holder also comes ToughBuilt bar (one piece), 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/#ac-tape-1x1in-cutter

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.
