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Thread: Budget bench grinder?
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13th November 2018, 09:26 AM #1
Budget bench grinder?
I'm about to get a bench grinder dedicated to sharpening (have a separate home made polisher).
Something lower speed is preferable, and my budget is pretty tight.
Any suggestions?
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13th November 2018, 02:40 PM #2
Slow speed grinders are usually a bit more than budget but can be had for under $300. Other way is a wet wheel grinder but you will also need to spend a fair bit extra for all the jigs that go with it. It depends on what you are sharpening also.
I do my turning tools on a budget 8'' grinder ($50 at Supercheap Auto) with a white wheel fitted. Plane irons and chisels I do on diamond plates and stones with only the very rare bevel regrind on a grinder if the bevel is way out of shape.
Did a quick Google for slow grinders.
https://www.timbecon.com.au/sharpeni...-bench-grinder
https://www.beyondtools.com/product/...-808-by-rikon/
Regards
John
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13th November 2018, 10:03 PM #3
cheers!
Yeah, its only for turning chisels, as I'm just starting to learn on a cheapy lathe. Chisels, planes and router bits I do by hand, and I'm looking at professional sharpening for my table/miter saw blades.
Yes, I was thinking perhaps an SCA grinder with a white wheel and home made jigs, just concerned about the blade temp. Might get some crappy turning tools to learn sharpening on first.
How does the SCA one go for power with sharpening? 250W?
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13th November 2018, 11:07 PM #4.
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250W is OK for a 6" wheels but if you want to use 8" wheels you will need at least a 375W.
With a small lower powered grinder you have grind more slowly but that's fine for newbies because if you accidentally slip or make an incorrect pass you are less likely to stuff up a chisel.
The grinding wheels that come with the SCA are pretty hopeless and you should get yourself a white wheel.
If you are just grinding HSS and using a white wheel its pretty hard to overheat them.
When you get more proficient and hopefully your budget improves you can go for something like a 1HP grinder with an 8" CBN wheel.
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14th November 2018, 12:08 AM #5
Heffa, if you simply plan to grind/sharpen turning chisels, then a high speed grinder is preferred. The majority of turning chisels are HSS. These do not need to be "babied", as with high carbon steels such as O1. HSS does not burn and heat and speed is irrelevant. This makes it easier to choose a grinder. The wheel, too, is less critical. Just about anything works.
When you can afford to upgrade, then look into CBN wheels and better grinders.
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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