Airwalker16
Well-Known Member
Dude you need a Lot More than 20. Cancel that and order 100 off amazon. For $5
CXB3590 DIY Build and Grow
Airwalker16
Well-Known Member
I did all mine with a hand drill. It's simple. Just go to harbor freight and get their set of 1/64 increments titanium bits. It's like $7. That 7/64 in there drilled every single hole and could drill 10,000 more without breaking. It eats through aluminum like butter
Airwalker16
Well-Known Member
DO NOT BUY THESE. They are NOT self tapping. Here's a link.
It is eBay but it didn't nearly take as long as the shipping said it would.
http://m.ebay.com/itm/200Pcs-M3x8mm-Black-Harder-Phillips-Round-Head-Self-Tapping-Electronic-Screw-/161169202928?txnId=1360181704006
These are the EXACT ones from the exact seller I ordered from that I PERSONALLY used in my build.
DarthBlazeAnthony
Well-Known Member
why do you say don't use them but then say you used them in your build? I ordered these and picked up 20 from Home Depot just now. I also picked up these plugs which I need for each driver.
M3 x 8mm - Qty 25 - Phillips Pan Head Machine Screws 2 orders.
for the drivers
Project Source 15-Amp 125-Volt Orange 3-Wire Grounding Plug
alaskanboy
Well-Known Member
Hello Zep, it sounds like you are going back to a regular HS. So, will the new one be passive cooled? I like the design of your passive build so just wondered why you'd switch.
Airwalker16
Well-Known Member
Dude look at the difference in THREAD sharpness. Those are so blunt and basically half circles. The ones I used are like a blade that presses a thread into the aluminum. It's all about the threads. That's what classifis them as self tapping. Your styles are very small and weak. Easy to spin out and lose all hold from the hole.
DarthBlazeAnthony
Well-Known Member
back to the hardware store for me
zep_lover
Well-Known Member
when i do build my next lights ,i will probably go with one long heat sink.it was alot of extra work and expense building them as i did.the 5.88 profile at 44 inches is more then enough for passive cooling of 4 cxb 3590 run at 50 watts each.i only built my lights now because i changed how i am going to use them.i intended to surround a big plant with 10 cobs hanging all around it.that was going to take up too much floor space.what ever i build will be passively cooled!thanks for the compliment!
http://www.amazon.com/Self-Tapping-Truss-Head-Screws-Pcs/dp/B0002ZPEWW/ref=sr_1_5?ie=UTF8&qid=1455592634&sr=8-5&keywords=self+tapping+screws
these are self tapping see the beginning of the screw .if its just pointy doesn't mean its self tapping
these are self tapping see the beginning of the screw .if its just pointy doesn't mean its self tapping
Fastslappy
Well-Known Member
that's a self drilling self tapper , self tapper have a short nub but no drill bit
any coarse thread sheetmetal screw will work just find the less aggressive threads & slightly over drill the size
DarthBlazeAnthony
Well-Known Member
Can I passively cool 3 cxb3590's on a 36 inch 5.886 profile? I think the cobs run at 50w each.
Airwalker16
Well-Known Member
You need to order them from the eBay link I posted. Unless you really have a store with them. I couldn't find a single store with even M3 screws, period.
Airwalker16
Well-Known Member
Slightly UNDER DRILL the size.
I used #4 screws on mine. It doesn't have to be an m3. It just needs to fit through the holder.
Airwalker16
Well-Known Member
That's true. I bought #4''s too. But then itd be a different bit and you'd need to find self tapping ones. I couldnt.
Jp.the.pope
Well-Known Member
I also used #4 self tapping. 4-40 drill and tap. From what I can tell from other users the M3 might be a little easier to use but harder to find in the US.
The #4 works perfect.
Airwalker16
Well-Known Member
EBAY
A #4 screw might still fit in those same holes. Hop on down to the store and grab a couple and try one out. If it's to loose than it won't work. If it's to tight be careful to not snap the screw and drill the holes a bit larger.
There is a thread in the led section with info on tapping the heatsinks. Always be careful who you trust on the internet because its hard to tell who actually knows and who is constantly getting corrected
There is a thread in the led section with info on tapping the heatsinks. Always be careful who you trust on the internet because its hard to tell who actually knows and who is constantly getting corrected