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Mounting Bracket for Three 3.5-Inch Drives in Two 5.25-Inch Drive Bays

by neufeld, published

Mounting Bracket for Three 3.5-Inch Drives in Two 5.25-Inch Drive Bays by neufeld May 21, 2011

Description

I have a rackmount server with a drive cage for one 3.5" hard drive and three 5.25" drives, but I wanted to mount four 3.5" drives.

This bracket adapts 3.5" drives to fit in the 5.25" cage and positions three 3.5" drives vertically in the space intended for two 5.25" drives.

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I have a lot of hard drives mounted this way, but I do have fans blowing straight through them. They have survived for years this way, so adequate cooling can be accomplished.

The cooling is a fair question, and the best answer I can give is to say that I don't think this leaves any less space between the 3.5" drives than the original left between the 5.25" drives.

My friend Jeremy has already asked me for a revamp with a fan mount. I need to find out a little more about how serious he is and what he has in mind before I take that on.

man, it wont be long before people starting making complete cases and uploading them to thingiverse. nice work. (i also wonder about the cooling but.. )

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Instructions

If desired, edit the OpenSCAD to select whether or not to make relief cuts for better screw hole perimeters ("relief" variable, default true) using Zach's incomplete polygon method from blog.makerbot.com/2010/12/13/design-tip-incomplete-polygons/ . The code is fully parametric but you're unlikely to want to change much else besides screw sizes and minimum plastic thickness.

Print four brackets. I had good luck with the heated build platform on my CupCake, and you will need most of your X-axis travel.

Remove any ooze and stringing from the small-drive mounting ridges. Drill through the supporting membrane under the six upper holes with a 9/64" or comparable bit. Clean out the four lower pilot holes if needed.

Set three 3.5" hard drives on edge, set two brackets onto them with the mounting holes aligned and the bulk of the bracket body toward the center of the drives (screw recesses toward the ends), and install the drive-mounting screws. Flip the assembly and repeat for the other two brackets.

Position the whole assembly inside the drive cage, aligning the pilot holes with the cage's mounting holes, and mount to the cage. Sheet-metal screws worked best to self-tap the plastic pilot holes.

Comments

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JohnnyDude on Nov 30, 2012 said:

I have a lot of hard drives mounted this way, but I do have fans blowing straight through them. They have survived for years this way, so adequate cooling can be accomplished.

donb on May 22, 2011 said:

man, it wont be long before people starting making complete cases and uploading them to thingiverse. nice work. (i also wonder about the cooling but.. )

cyrozap on May 22, 2011 said:

This is pretty awesome, but how do you handle cooling? It just looks like it'll overheat due to the close proximity of the drives to each other.

neufeld on May 22, 2011 said:

The cooling is a fair question, and the best answer I can give is to say that I don't think this leaves any less space between the 3.5" drives than the original left between the 5.25" drives.

My friend Jeremy has already asked me for a revamp with a fan mount. I need to find out a little more about how serious he is and what he has in mind before I take that on.

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