19" Extended Rack Mount: Assembly and Install

For the 19" Extended mounts: a centre tray that holds the device, plus a separate ear at each end. Assembled, it spans the full 19" rail on its own. If yours came as two halves with a seam down the middle, use the Modular guide instead.

What is in the box

• 1 x centre tray. The brass threads at both seams are already fitted.
• 2 x ears.
• 4 x M3x12 seam screws on a 1U mount, 6 x on a 2U.
• 1 x 2.5mm hex key.

Rack screws are not included.

Work in this order: assemble, rack, then fit the device.

Step 1. Slide the ears on

1. Lay the tray face down, rack face flat on the table.
2. Bring an ear on from the back and slide it forward until it stops.
3. Repeat at the other end.

Both seams are dovetails, so they only go together front to back. An ear that will not move is coming at the seam from the wrong direction.

Check: all three rack faces sit in one plane.

Step 2. Bolt the ears

1. Start every screw by hand. Two per ear on a 1U, three per ear on a 2U.
2. Tighten them evenly.
3. Stop as soon as each head seats.

Screw length matters more here than anywhere else I sell. The ear is thin, so the screw reaches the brass almost straight away. A longer one bottoms out while the head is still standing proud, and the ear ends up hanging off the screw tip. Use what came in the bag.

Check: no gap at either seam, and no screw head standing proud.

Does your box have a separate flat plate with screw holes? Then yours holds the device captive and assembles in a different order. Follow Mounts with a Back Plate instead, starting now: the device and the plate go on at the bench, before the mount is racked.

Step 3. Bolt the bracket into the rack

1. Fit cage nuts first if your rack has square holes.
2. Start all four rack bolts loose, two per ear.
3. Let the bracket settle in the slots, then tighten.

The oval slots take M6 and #12-24.

Check your rack screw length before you start. A printed faceplate is thicker than a steel one, so a short screw, or a screw with a washer under it, can run out of thread before it bites. Go up a length or drop the washer.

Step 4. Fit the device

1. Slide the device in through the front.
2. Push until it stops against the bars at the rear corners.

Check: the device's front face sits level with the rack face.

What holds the device in

On this bracket, nothing clamps it. (Mounts that came with a back plate are the exception: there, the plate holds it captive.) The pocket is cut about half a millimetre larger than the device on each side, so it is a friction fit with the rear bars as a backstop, and in a rack the cables do the rest. It also means you can pull the device out later without touching the bracket.

For a rack that gets moved, a strip of hook-and-loop tape on the tray floor makes it captive and still removable.

Troubleshooting

An ear will not slide on

It is going on from the front. Turn it around and come at the seam from the back of the tray.

A screw spins and never bites

The brass insert has sat too deep. Do not force it. Message me and I will send a replacement ear or tray.

A rack bolt will not start

Screw length. See the note in Step 3.

The device will not go in

Check for a stick-on label or a rubber foot first. If it is genuinely too tight, check your device's revision against the model numbers in the listing.

There is a gap around the device and it does not feel snug

That is almost always the clearance cut for the rubber feet on the bottom of your device, and it is meant to be there. Check the device is pushed all the way back against the rear bars. If it is seated and still rattles, send me a photo and I will check it against the design.

The mount is too wide for my rack, or the holes will not line up

These are cut to the EIA-310 standard, 465mm between hole centres, which is what a real 19" rack uses. If one ear lines up and the other does not, your rails are not on the standard spacing. That is common in wooden AV cabinets and some furniture-style racks sold as "19 inch", where the rails are decorative rather than to spec. Measure the centre-to-centre distance between your rail holes and send me the number. Do not trim the ears, because the mount then has nothing to sit against.

I think I have the wrong mount

Check the model on the label underneath your device against the model list in the listing you ordered from. Manufacturers reuse names across chassis that are not the same size, which is where most of these come from. If it is the wrong one, message me with your order number and a photo and I will sort it out. Do not modify the part to make it fit, because that ends any chance of me replacing it.

A piece arrived cracked

Message me with your order number and a photo, even if the box looks fine. Printed parts can take a knock in transit that the packaging does not show. I will reprint and post a replacement.

I need to replace a screw

The seam screws are M3x12 socket head on current Extended mounts. A few of the older ones shipped a shorter screw, so if yours came with something else, match what you have rather than what this page says. Message me with your order number and I will post replacements free either way.

Hardware missing from the bag

Message me with your order number and I will post the rest the same day.

Why there is no blank half

Extended mounts are not part of the Modular Series. The device is wide enough to take the whole row, so there is nothing to pair them with. If you want two devices sharing one U, that is a Modular mount.