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Water Block Design / Construction Building your own block? Need info on designing one? Heres where to do it |
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11-23-2003, 10:46 PM | #1 |
Thermophile
Join Date: Jun 2001
Location: The deserts of Tucson, Az
Posts: 1,264
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Thinking about doing a practice block. Recommendations?
I got some spare time for the first time this semester. The local machine shop has tons of scrap aluminium (enough to make dozens of blocks) and i can use as much as i like. I'd like to practice milling a block. I've got some fairly small endmills (down to 1/4 inch IIRC), every size tap and tons of lucite. What should i start with? I'm thinking a rotor style block with a gasket and lucite top. Doable with very little experience and 1/4 inch mill bit?
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11-23-2003, 11:35 PM | #2 |
Thermophile
Join Date: Oct 2002
Location: U.S.A = Michigan
Posts: 1,243
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mIght try a roughing mill bit and to add a lot more surface area per pin.
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11-24-2003, 11:11 PM | #3 |
Cooling Savant
Join Date: Jun 2003
Location: North Billerica, MA, USA
Posts: 451
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1/4" seems a bit large, especially for the channels between the holes. It would mean either ending up with very few pins, and/or very tiny ones with most of the block space being water passage.
I would suggest a 1/8" or so bit instead, but either be very careful to use shallow cuts and slow feeds, or plan on breaking a few bits. (I went through about 8 bits making two blocks in Cu) Coolant will help. What I did was to make a 'gallery' at each end with a grid of 1/8" passages on 1/4" centers (leaving 1/8" pins) connecting them. The grid lines were at a 45* angle to the galleries, so there was no 'straight line' path through the block, but rather the coolant would be forced to follow a zig-zag path, with a potential collision and resulting turbulence at each intersection. I crudely flow tested the two blocks with a 'bucket test' and got approx 3GPM in series, or 5GPM in parallel using an Iwaki MD-20RT pump (8GPM into 14' head specs) Gooserider
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Designing system, will have Tyan S2468UGN Dual Athlon MOBO, SCSI HDDS, other goodies. Will run LINUX only. Want to have silent running, minimal fans, and water cooled. Probably not OC'c |
11-25-2003, 11:54 AM | #4 |
Put up or Shut Up
Join Date: Dec 2001
Location: Spokane WA
Posts: 6,506
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For a rotor type block you will want 1/4" DRILL bit (3/16" might be better), and a 1/16" end mill to connect the grid. Don't try and use the endmill for plunge drilling unless it is a ball nosed one. Once you get the holes drilled you can then plung the endmill in the drilled holes to flatten the bottom of the holes. Not sure if that would help or not though.
If 1/4" is the smallest you got and you want to mill something then try a maze design or something. |
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