Look at my big typhoon Lapping

Polishing aint bad and wont remove flatness you just spent time on, the polish is like fine toothpaste, you would need rub it a 1year and renew polish 10000000x to remove enough metal, it just helps to buff out very small scratches caused by the sandpaper, you dont wear out your silver or brass items liek medals using silvo or brasso do you ? (im talking polish not the real abrasive metal remover).

Some claim circular motion aint ideal even I have mead a boob of it a trying that way but thats cause i did other wau 18years, I know we did it in 1 direction after we had swapped about direction (always longwards) to get flat, then only 1 way turning it around so your doing it from both ends in turn.

Lapping is one of the oldest finishes known to engineering and wasnt invented by some spotty geek 18year old pc wizz on some review site BTW.

I laped circular in the last grit, as the techpowerup guide says... the base passes all the flatness tests, ruler, knife and the waterdrop... I cleaned really good the base with water after polishing

I got my sandpaper at homecenter (local store) they only had up to 500 grit...and polished with brasso..

Thats some nice lapping:)

Circular motion, forward/ backwards, side to side, I guess it doesnt really matter as long as your on a flat surface like glass and you're keeping the heat sink parallel to the surface right?

Quote:

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Originally Posted by Ãœbergeek

Wish I could get that in the netherlands :stick:



Where did you buy the fine sandpaper? You're from holland right? :fact:

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I used 400 grit to flatten the base... you can get it at your local hardware store (Praxis, Karweij).
To get it all smooth I used Commandant rubbing compound (red #3) and cleaner (green #4)..

What I also did change was the amount of AC5 used and how I applied it... usually I cover the entire IHS but now I've limited myself to a dot in the middle and let the HSF pressure do it's work... not sure if it really works though or which one suits better..

NCâ„¢

Nice job. :) I use a 1' x 1' pain of glass on top of a wood table. I use somthing like 300 grit for neglected, or lots of machine marked heatsinks. I then end up with about 1000 grit paper. After that I polish the rest to a mirror finish with brasso and paper towels. I do a final polish with a lint free towel.

circular provides best flatness, if you just do it back and forth, then any little raises on the paper will be magnified because the same area is being rubbed over it again and again, and would create a valley.

Untrue, from me engineering use and same for most sites that have guides for cpu heatsinks they say back and forth, a few say circular, but your removing more material every pass.

Anyhow i dont really give a damn, ive been lappy vitial engine parts gas tight longer than some the pups on the pc sites have been alive. :)

Personally when I lap, I do circular in one orientation for 5 minutes, then rotate the block 90 degrees and do another 5 minutes, then rotate again and so forth I do this at each grit as I progress. It gives me an adequate base, need to pluck up the courage to lap the IHS at some point perhaps :) Not yet rich enough to try lapping the die :p

P.S Everyone knows that having a mirror finish on the base of your heatsink will reflect heat back onto the CPU

:p

^ joke btw ;)

Yeah, Most CPU's HATE thier reflection. It gives them a complex :P

I just got my Big Typhoon in today, I'm going to lap it over the weekend. I'll post my pics of my process when I finish.

Waiting for the pics :D

Nicely done lapping Detonator.cl :toast:

I just lapped my Big Typhoon from ugly stock base going from sand paper ranges of 220 - 2000, then some toothpaste polish to get it close to mirror finish, I don't have any results to post, since im waiting on my new processor mobo and I got bored, but hey it looks nice :woot:

also, another reason to avoid alot of metal polishers is that they contain alot of wax to protect the metal. which isnt a good conductor of heat at all.

and btw. core lapping isnt that hard, and provides nice temp drops. did mine a while back.

West, Do you not think to totally wash heatsink in warm soapy water then rinse well and dry 100% using heat after using metal polish, that is the answer. :rolleyes: