Airflow, Cord Routing, Strap - Backstage cart lip (one piece, strongest)
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What it holds: Hangs one rapid or multi-voltage charger (up to 204 x 176 mm) on the cart side: rails and slotted floor for air, snap-in cord slot, figure-8 cord cleats, tall lips and a strap path. DOCK mount.

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
  - H_RD_S_charger_shelf_lip.stl  (supports: no (unless your slicer warns))

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 Magliner/cart lip block. The shelf stands beside the deck with its floor level with the deck, so it prints upright on one flat face with no supports. The block stops short of the cord slot (the cord drops down beside it); the back vents behind the block are closed, air still comes up through the slotted floor. No kick pads below the deck: fit BOTH M5 lip clamps and the strap. ~408 g.

HOW IT WORKS
  A cart with a stinger or village power charges packs all day, and a charger on the deck slides off, gets its vents covered and has its cord pinched in a drawer. This shelf hangs one rapid or multi-voltage charger (up to 204 x 176 mm) on the cart side, where it can breathe and stays out of the way. Two chargers? Hang two shelves side by side.
  Airflow, never enclosed: the charger stands on four 8 mm rails over a slotted floor, so air comes in from below. There are vents in the back wall, diamond vents in both side walls, and the top is open. Keep 10 mm of air around the charger.
  Cord routing: the cord drops through a slot in the bottom of the back wall at the right-hand rear corner. Push it up into the slot from below: it snaps past a 6 mm throat, which takes the strain off the charger end. Then it hangs down behind the shelf, between it and the cart. Spare cord wraps in a figure 8 on the two cleats on the right-hand side wall.
  Stays put on a moving cart: a 24 mm front lip and side walls box the charger in, and the strap is part of the shelf, not an extra: a 25 mm hook-and-loop strap goes under the floor, up through the slot in each side wall, over the charger and the pack on top of it, and closes on itself. A charger with a big pack seated on it is top-heavy, so strap it every time the cart moves.
  Cart facts (on the lip adapter)

  - Inside 204 mm along the cart x 176 mm out. Sticks out 202 mm from the cart side (use a cart end)
  - Floor 44 mm below the deck; the back wall top is 34 mm above it. A 76 mm-tall charger with a pack on top reaches about 115 mm above the deck
  - Rated 3.0 kg on 2 tongues, rolling cart, lock screws AND strap fitted. charger about 1 kg + one HD12 pack 1.55 kg = 2.6 kg (+ shelf 0.3 kg)
  Lock screws are required, and this is rated for a rolling cart. These parts carry their weight 100-115 mm out from the cart side, so a hard jolt pries on the DOCK tongues much harder than a holder that sits close in. Fit the M5 lock thumbscrew in every adapter, every time. The rating is for pushing the cart around a stage, a lot or a ramp. It is not yet rated for lift gates or riding in a truck: take the packs off for those, or run the moment bench test in the build notes first.
  Mount (DOCK): every holder in this collection has DOCK tongues on its back: 38 mm wide 45 degree dovetails that drop into a DOCK adapter and click. The lip adapter (A_MLN_lip, in the DOCK system collection) grips the 3.4 mm upright shelf lip of Backstage Equipment and Magliner-style carts. The same holder also fits the ToughBuilt bar, round tube, square tube and T-slot adapters. Parts with three tongues use three adapters set 60 mm apart with the DOCK spacing gauge. To lift a holder off: undo the lock screws, press each adapter's thumb tab, then lift.
  Hardware: 2 x A_MLN_lip with M5 insert + thumbscrew locks (required); 25 mm hook-and-loop strap, about 750 mm (required).
  Fits Milwaukee M18 and M12 battery packs. Not affiliated with, endorsed by or sponsored by Milwaukee Tool. M18, M12, REDLITHIUM and PACKOUT are trademarks of their owner and are used here only to say what the parts fit. This is not a PACKOUT-compatible part. Not affiliated with Backstage Equipment or Magliner.

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/#rd-s-charger-shelf

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.
