Thread: lapping 8k norton

Is it ok to lap a norton 8k with the norton lapping plate? Seems like these would leave it a little rough.

Does anyone have any experience doing this?

If not ok, what would you recommend?

robert

Originally Posted by straightrobert

Is it ok to lap a norton 8k with the norton lapping plate? Seems like these would leave it a little rough.

Does anyone have any experience doing this?

If not ok, what would you recommend?

robert

Tell us more...

If the hone is far from flat the norton lapping plate makes sense.

If it is close to flat and if you have a flat surface pick up some 2000 wet/dry emery paper at the paint store.

Just from what I can tell, it shouldn't be a problem. Yeah, it leaves the 8k a tad rough, but it glazes over pretty quick too.

I just hate the Norton lapping stone cause it dishes out as well

If you plan on using the Norton stones much, it would be in your interest to invest in a D8C for lapping purposes. Save you some frustration

Are these D8C's big enough to cover the whole norton stone? I keep hearing about using the diamond plates but the only ones I've seen in the woodworking store are pretty small.

Link?

yes they are large enough.usually they come in3 diffrent sizes(dmt s) 6x2.8x3.11x3. 8x3 should do the job.i have never lap any stone more then1000 grit sandpaper.even i do lap with dmt600 my escher,s and never had any problems.

Originally Posted by Stubear

I use a DMT 325 grit for all of my stones, from 1k up to 16k.
........!

That is what I have been doing as well... However, last night I was on the phone with a long time member here and they suggested that some work with 1k wet/dry sandpaper would help glaze the 8k norton and make my stroke glide easier. Will try it today...... Made sense to me.

Like Sham said above, they come in different sizes. The D8C is the 8x3 (same size as the Norton stones) so yes, it will work fine for them.

I understand using the 1k W/D sandpaper, as I did the same thing when I first got mine, but I got away from that (hated using up good sandpaper for lapping.)

The 8k is pretty soft anyway, so like I said, it will smooth over in no time, and (I haven't tested this to prove it BTW) but I don't think it would do any damage to the edge using the D8C to lap the 8k.

Originally Posted by avatar1999

Just from what I can tell, it shouldn't be a problem. Yeah, it leaves the 8k a tad rough, but it glazes over pretty quick too.

I just hate the Norton lapping stone cause it dishes out as well

If you plan on using the Norton stones much, it would be in your interest to invest in a D8C for lapping purposes. Save you some frustration

One subtle trick when rubbing a pair of stones together is
that the top one gets concave and the bottom one convex.
If you alternate top and bottom you might see less dishing
while you are saving for that D8C (or larger). In part this is how
mirrors for reflecting telescopes are ground.

While we are on the topic of lapping can a swayback
but level large hone be used to advantage. A crown or
trough (smile or frown) is problematic but what about
a bit of swayback shape. I ask because a half inch (1.5 cm)
chunk of bar stock square or round is easy to come by
and I have a big fast cutter that has a kitchen knife induced
sway back. The geometry I am thinking of is the inside of a
cylinder +ten feet ( 3M) in diameter.

400n grit sand paper on a glass plate

wash well after flatteneing but works great