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hollow grind on a parting tool or NOT?

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Forum topic by ken_c posted 02-27-2014 12:41 PM 1477 views 0 times favorited 11 replies Add to Favorites Watch
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ken_c

322 posts in 2826 days


02-27-2014 12:41 PM

what is the consensus, do we put a hollow grind on a parting tool or not? be it a diamond, thin or flat, hollow grind or no?


11 replies so far

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Nubsnstubs

1062 posts in 1394 days


#1 posted 02-27-2014 01:50 PM

If I understand Hollow Ground, you can’t help but put it on a parting tool if your using a round grinding wheel….. ........ Jerry (in Tucson)

-- Jerry (in Tucson)

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DIYaholic

19306 posts in 2339 days


#2 posted 02-27-2014 02:00 PM

I use my 8” grinding wheel, so….
I’d say, yes???

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

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dogmir

25 posts in 1636 days


#3 posted 02-27-2014 02:18 PM

As stated if you are you going to sharpen it on a grinder it will happen. That is just he nature of using a grinder. However a parting tool is something you could sharpen with a variety of other methods to maintain a flat grind. Personally I don’t find myself grinding my parting tool all that often. I usually just hone it quick with a DMT diamond stone. I learned that from Alan Lacer. He uses that method to touch up skews. It works just as good for a parting tool in my opinion.

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TheDane

5180 posts in 3327 days


#4 posted 02-27-2014 02:57 PM

It is macht nichts to me … I used to sharpen mine on a belt sander, but had to use a wheel when I took it to seminar. Since then, I just use the wheel & tool rest.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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ken_c

322 posts in 2826 days


#5 posted 02-27-2014 03:32 PM

Ok Dane, thanks, since you have done both and aside from convenience which do you like better and why? I just got a new 1/8 flat side( not diamond) parting tool. I already had 3/16 diamond tool which I took to a wet wheel and now is hollow ground. I use a tormek, but for this tool I paused and I am trying to understand what if any advantage will be gained by going hollow or not.

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waho6o9

7795 posts in 2241 days


#6 posted 02-27-2014 04:01 PM

No hollow ground on this type of parting tool:

Yes to a hollow ground on this type of parting tool:

If I understand you correctly. You can grind and make your own tools as well.
That’s what I do when duplicates.

HTH

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TheDane

5180 posts in 3327 days


#7 posted 02-27-2014 05:05 PM

ken_c—Don’t have a preference. I don’t see any advantage either way.

I don’t like wasting steel, so I will keep on using the wheel … no sense in re-grinding them again.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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davidmackv

317 posts in 1312 days


#8 posted 02-28-2014 12:08 AM

I sharpen my parting tool on my belt sander.

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jumbojack

1672 posts in 2288 days


#9 posted 02-28-2014 12:45 AM

disc grinder for the parting tool. Us Shopsmith owners even have a jig available to sharpen most of our turning tools on the disc. BUAHAHAHAH

-- Made in America, with American made tools....Shopsmith

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Jimbo4

1549 posts in 2427 days


#10 posted 02-28-2014 01:44 AM

Doesn’t make any difference – I’ve done it both ways. If it’s hollow grind, then you can hone.

-- BOVILEXIA: The urge to moo at cows from a moving vehicle.

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ken_c

322 posts in 2826 days


#11 posted 02-28-2014 11:19 AM

thanks all. i will use a flat diamond hone until that becomes to time consuming then, to the wheel…

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