Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 16 to 29 of 29
Thread: Bench grinder advice
-
19th May 2015, 04:08 PM #16SENIOR MEMBER
- Join Date
- Feb 2015
- Location
- Oz
- Posts
- 615
Wheels
I have a gray coloured wheel I bought 20 odd years ago for sharpening some bits I had, it's an extremely course grit, would that be silicon carbide?
-
19th May 2015 04:08 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
19th May 2015, 04:12 PM #17.
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 27,792
-
19th May 2015, 07:05 PM #18SENIOR MEMBER
- Join Date
- Sep 2011
- Location
- Ballarat
- Age
- 65
- Posts
- 2,659
I think grey would be aluminium oxide.
Phil
-
19th May 2015, 07:36 PM #19SENIOR MEMBER
- Join Date
- Feb 2015
- Location
- Oz
- Posts
- 615
No it's not ally, touch it with HSS and it disintegrates, Wish I could remember what tool bits I was using at the time, all I remember is an ally wheel just wouldn't touch it. I'll get a picture...
-
19th May 2015, 07:45 PM #20SENIOR MEMBER
- Join Date
- Feb 2015
- Location
- Oz
- Posts
- 615
It!
This is it!
-
19th May 2015, 08:10 PM #21GOLD MEMBER
- Join Date
- May 2011
- Location
- Murray Bridge SA
- Posts
- 3,339
Aluminium Oxide (Grey Marked A) wheels are used for grinding mild steel, low carbon steels, it's a lot softer than anything else. Silicon Carbide (White Marked C) is what is required for tool steel. Green Silicon Carbide (Green Marked GC) is used for the Carbide tipped tools.
A good book to get, is Tool and Cutter Sharpening by Harold Hall. Workshop Practice Series number 38. It shows how to adapt a standard bench grinder, to be able to sharpen lathe tools, drills and milling cutters, by making reasonably simple tools to go on the grinder. Priced from Minitech in Qld $18. 00 plus Grab Snatch and Take, and postage. No connection with the business, just a happy customer. Well worth the money though
Kryn
-
19th May 2015, 08:11 PM #22.
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 27,792
-
19th May 2015, 09:01 PM #23SENIOR MEMBER
- Join Date
- Jan 2015
- Location
- Sydney
- Posts
- 129
Just placed an order for this http://www.machineryhouse.com.au/G155
Seemed to have more features and more power then the abbot and ashby. Now to get some green wheels for it. Can green wheels be used on hss?
-
19th May 2015, 09:06 PM #24SENIOR MEMBER
- Join Date
- Feb 2015
- Location
- Oz
- Posts
- 615
Nope, something else.
No it's not ally oxide, I specifically bought this wheel to sharpen some bits I bought for a project. HSS wouldn't cut the material and ally oxide wheels wouldn't touch the bits so I sent off for this wheel. I only remember these details because I was living in Katherine at the time, if memory serves, I bought the wheel from Herless before they disapeared, the same mob I bought my lathe from around the same time. No internet in those days, I used to get catalogues from Herless and Hafco, lathes and accessories weren't cheap back then and that wheel cost a bomb.
-
20th May 2015, 10:56 AM #25SENIOR MEMBER
- Join Date
- Jun 2012
- Location
- SA
- Posts
- 1,478
It looks to be a grinding wheel for carbide tools.
Norton make this style of stone with an open/coarse composition.
I have the exact same stone configuration, plus a regular fine green stone on my carbide tool sharpener.
I think Norton class it as an "A" type = not sure.
It's very aggressive, but still capable of a fine finish.
Goes through carbide like nothing else.
Cheers RobThe worst that can happen is you will fail.
But at least you tried.
-
20th May 2015, 12:42 PM #26.
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 27,792
Power ratings on stand alone electric motors seem to be actual true output powers at the stated currents and voltages. Well at they have least for the 20 or so motors I have tested.
However, some bench top grinder power ratings seem to be based on input powers (Applied V x current draw).
Of the 6 grinders with integrated motors I have tested only the Abbot and Ashby and the GMF grinders 3 Phase had power ratings based on outputs.
Anyway it looks like a good grinder.
If you want a really good wheel I'd be looking at a CBN.
-
20th May 2015, 09:27 PM #27Tool addict
- Join Date
- May 2008
- Location
- Perth
- Posts
- 164
Alas, I'm too late to chime in with the suggestion of going and perusing old abandoned salt mines, as that's where I rescued my mighty little 150mm grinder from, solid, unsightly exterior with untouched insides, perfect balance, even had a wire wheel (rusted beyond use) and a coarse grey wheel.
Pretty lucky really, considering that everything else about that mine looked fairly well trashed from years of local louts visiting and vandalising
-
20th May 2015, 11:14 PM #28Intermediate Member
- Join Date
- Jul 2009
- Location
- perth
- Posts
- 36
Also too late!! but fully agree with Bob L as regard the older grinders having a bit of life left in them.
I procrastinated for a while but on good advice from Anorak Bob decided to go back and purchase a nice 8" 3 phase pedestal grinder which I doubt I will ever regret.
-
20th May 2015, 11:46 PM #29.
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 27,792
Similar Threads
-
First bench build + advice--Attaching Bench top?
By hellofellow in forum THE WORK BENCHReplies: 3Last Post: 20th December 2013, 08:26 AM -
Hand Grinder / Manual Bench Grinder — General comments
By US-Oz in forum HAND TOOLS - UNPOWEREDReplies: 24Last Post: 6th June 2013, 07:59 AM -
8" bench grinder purchase advice
By bellyup in forum WOODTURNING - GENERALReplies: 15Last Post: 5th July 2011, 05:47 AM -
Bench for my grinder
By Woodworks in forum WOODWORK PICSReplies: 25Last Post: 29th June 2009, 02:19 AM -
Bench grinder rpm
By BFR in forum SHARPENINGReplies: 3Last Post: 12th May 2008, 07:26 PM