Need some more advice on lapping OD

eKretz said:

Got a photo of your setup? How are you making a hone with 500 grit diamonds? Do you really mean you made a lap? Need to get some better info before offering any advice.

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dcsipo said:

I am honing a cylinder it is 9 " long 4" diameter. I made the hone and I am using 500 grit diamonds. I managed to hone a .001" taper into it. I have 2 adjusting crews on the hone. Am I not tightening them evenly? or not moving the hone enough? I had a different resistance on the ends and tried to balance it with the screws. Should I just have one adjustment in the center of the hone? the hone is 4" long. this is all new to me . Any practical advice would be appreciated.


dee
;-D

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Milland said:

If that's a loose charge hone, add more diamond to one side in an attempt to have that side cut more (for the large diameter, of course). Preferentially stay on the high side until you bring it down, then focus on uniform finishing with full side-to side lap movement and frequent flipping of the lap to even out cutting.

Measure frequently, and be sure your lap doesn't have an inherent diameter bias. As a wood device (right?), you may have variations in stiffness and diameter along the lap's length.

How are you checking cylindricity? Is it good?

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dcsipo said:

Thanks for the tips:-)


dee
;-D

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eKretz said:

Yeah, wood was not an ideal choice, to say the least. Hopefully you'll be able to work around it. Have you been flipping the lap end for end as suggested by Milland?

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