My SK6 needed to be lapped badly!

Dethedrus

Member
Jan 21, 2000
55
0
0
When I first got my SK6 (Monday afternoon) I was depressed at how badly machine the bottom was! It was replete with a number of ugly swirls and a few noticable slices (I could feel 'em).

So I set about to lap it, making sure to thoroughly clean between the various grits:

220 -> 400 -> 600 -> 1000 -> 2000

For the last two grits my wife was nice enough to stop at the local autoparts store on her way home And bear in mind that all but the first step was using wet/dry.

First I tried stopping at 600, but noticed faint latteral scratches. While I couldn't feel them at all, they still worried me. So I started over, this time going all the way to 2000, and instead of "figure 8ing" the whole time, I just kept changing the sanding direction between grits (perpendicular).

The lines are still there, still can't be felt, but this thing is a freakin' mirror.

Is this good enough? Or should I make it my life's mission to remove all traces?
 

HardwareAddicted

Golden Member
Apr 5, 2000
1,351
0
0

Your probably good man...

I did this also and to get it smoother, I went to 2000 firm pressure, then went to mild to almost no pressure to get the last finish I wanted...

Good lap though...it should be fine.

Use AS too !!
 

sped

Member
Apr 13, 2001
73
0
0
You are not kidding!

I too just got the SK6 and it has a heinous machining swirl mark right in the center where the die would contact the heatsink. I lapped mine and started with 400 wet dry and it was massivley concave. I could not even it out. I had to back down to 220 dry first. That did the trick and I took it all the way to 1500 grit wet sand I was able to see myself better than on my old aluminum sink. Its great so far. I lowerd my temps 5 degrees (C) and I'm not using the delta either.
 

jugornot

Senior member
Oct 19, 2000
229
0
0
My SK6 needed to be lapped badly!

Then I suggest a half round bastard file. That should do it very badly indeed. Or maybe glue it to a car tire and drive for a while. That should do it badly also.
 

Blain

Lifer
Oct 9, 1999
23,643
3
81
GREAT!
I was thinking about getting this HS because of the impressive reviews.
Just think how great it will be after a good lapping

On one hand, I'm sorry you guys were so disgusted...
But on the other hand, I'm thinking this HS has much more potential!
 
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