At this point I've done very little turning of wood so keep that in
perspective. Most of my hand tools (chisels and gouges) I hand
sharpen, when roughing is required I will resort to a bench grinder.
I also seem to gather that alot of sharpening of lathe tools is going on.
I liked to suggest that this may be partially due to the tools not
being sharpened well in the first place. First, even if your using HSS
or better tools it is still possible to impact heat treatment if you get
the tool to hot. Sure you have to get the tool hotter and you may not
impact as large as an area but it still none the less impacts the tool.
Second a guality edge on a tool will last longer than a rough grind
straight off a bench grinder. Lastly a quality edge also implies the
Granted most of my experience has been with HSS and carbide tooling at
work turning metal, but I believe the concepts are the same. If simple
grinding were the answer to sharp tooling then I'd like someone to
explain to me why a machinist would bother to hand hone lathe tooling.
Personally I think that a cupped grinding wheel that would allow for flat
grinds would be a better choice than another "bench grinder". In other
words a wheel that is designed to be used from the side.
To comment directly on yuour proposal, I think it could work well. The
speed of the wheel should not be an issue for dressing up the edge. The
only thing that may be a concern is the bronze bushings, and the small
motor. It may be better to reduce the friction buy going to ball
bearings or step up a size motor wise.
> I have done some searches on the topic of sharpening turning tools. It
> seems to be an endless topic - so instead of asking "what's the best
> way?..." I'd like to describe what I'm putting together and then perhaps
> someone could tell me if there is something wrong with the way I'm
> heading. I do have some experience sharpeninh - by hand - my carving
> tools, my Stanley hand planes (yes, I actually use them) amd my chisels.
> All are sharpened, honed and razor sharp.
> From what I have read, turning tools are sharpened quite often, and
> since I have plenty of parts in the shop, I'm going to put together a:
> 1/4 Hp TENV (Totally Enclosed Non-Ventilated) motor turning a 3/4"
> double ended mandrel such that rotation is away from me at the top of
> the wheel (oposite of the standard bench grinder), and rotating at 690
> RPM on bronze bushings.
> On one side a White, Open Structure, Aluminum Oxide Grinding wheel - 6"
> Diameter, 1" across. 5/8 hole size, 120 Grit On the other side, a round
> leather strop for honing the sharpened tool.
> Up front, a jig - home made version of the Oneway Wolverine.
> In case someone says the grit needs to be coarser to do faster, more
> intense grinding, I have two other bench grinders that can take care of
> that problem. My main concern is to keep the heat down. The tools will
> be HSS.
> Your advice is appreciated.
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