Lapping A HS

[Kaiser_Sose]

I want to be preparred with the knowledge of how to do this when the AX - 7 arrives


I know there has to be someone hear that can explain the process and what I will notice on the HS to let me know that I will have to do it in the first place

 

[dew042]

if the bottom looks like a mirror or evenly smooth don't worry about lapping. if you can see lines from factory lapping, or the surface has lots of defects you might get some serious performance boosts from lapping.

i like to get a mirror or sheet of glass about 8x10. its nice and flat and most people have em. you can start with 220 grit wet dry with water and be sure to keep even pressure on the hs. i like a figure 8 motion around the area. then move up to 600 and 1000 grit and by then you will be pretty darn smooth. i think 600 is even pretty good, but go as far as you like.....

thats the basics.

dew.

 

[AntiHeiss]

Here is what Hoot taught me....
All you need is 600 grit sandpaper. Especially with as smooth as most good heatsinks come out of the box these days. Use a piece of glass to lay the sandpaper on...its flat. You can use some water with a little bit of liquid soap in it. Start with large circles and lots of downward pressure. Once you start to notice a difference in the surface, start using smaller circles and less and less pressure. Also be sure to wash the slurry that is created off often. And personally, I like to rotate the heatsink about 90° every time I switch to smaller circles. Anyway, I think that is about it. If you have any more questions...PM Hoot, he can probbably explain it better than myself.

 

[silent bob]

I used 600 grit til all I saw were the 600 grit scratches(bout 15 min) then moved to 1000 til that was all I could see(7-10 min) then to 1500 and did that (20 min)and my 1.2 @1332 is still 32c,at full load (Fah and Sisoft Burn in)34c with my lapped hs,Spend the extra time and papers cuz it does help ,I did it til I could read the wattage on the light bulb that was above me when I was lapping

steve

 

[adamtekh]

i just used 1000 grit on a flat surface , figure 8 motion

took about an hour to get my 6cu+ lapped to the point where i could see my self and wink

 

[oc jason]

I used 600 grit til all I saw were the 600 grit scratches(bout 15 min) then moved to 1000 til that was all I could see(7-10 min) then to 1500 and did that (20 min)and my 1.2 @1332 is still 32c,at full load (Fah and Sisoft Burn in)34c with my lapped hs,Spend the extra time and papers cuz it does help ,I did it til I could read the wattage on the light bulb that was above me when I was lapping

steve

i did all that and then took an Dremel Tool, and used a polishing wheel to get MEGA SMOOTH.

dropped another 2c over the normal lapping