Turns out the washers holding the left hand grinding wheel on were about as bent as a 9 bob note! Quickly turned up a couple of replacements on the lathe and it was right as rain
Just bought a new 200mm grinder from screwfix and the vibration is hellish.
Fiddles about with the grinding wheels and got it a little better but still bad.
The blessed wheels are neither concentric or running true - they wobble both axially and radially.
So are there better replacement wheels to buy?
Any "names" to go for?
Cheers
Keith Fenner did a good set of videos on an issue like this - granted he is a machinist with all the tools. It could just be dodgy nuts or spacers
that are sending the wheels out of true.
I have a 6" bench grinder with a Machine Mart wheel which is wearing very quickly with loads of dust, I won't be buying another from them .
My bench grinder came with a crummy wheel when I bought it (probably from Machine Mart, but not sure). The difference when I replaced it with a
brand-name wheel from a reputable supplier was simply astonishing. The replacement was much heavier, smoother (even though it was nominally the same
grit) and felt more solid. It ran smoothly as soon as I started it up.
The reason I changed it was because my then employer had recently shown us a film about what happens when a bench grinder wheel explodes, although
they were talking about why you shouldn't abuse a wheel, not because of buying a second-rate one.
[Edited on 21/10/16 by David Jenkins]
We sell lots of different types but the branded is what makes a difference to quality and longeverty, you really do get what you pay for
https://www.cromwell.co.uk/shop?query=Grinding
3m and Siam abrasives or norton are very popular in industry's
Agree with the above, 3M discs are probably the best. Try the Cubitron 2 wheels, best i've tried.
grinding wheels can be 'dressed' which helps with balance, but I agree good quality ones are better
And don't forget, wheels come in different materials, hardnesses, textures and grit (roughness). There isn't a 'one wheel for all'.
quote:
Originally posted by rgb247
Agree with the above, 3M discs are probably the best. Try the Cubitron 2 wheels, best i've tried.
I have a cheap pro tools grinder which I can stop dead if i put too much pressure on it.
Other then that it will grind down mild steel ok, stainless just puts a groove in the wheel
Don't rule out the spindle i bought a brand new screwfix one to convert to cup wheels. The wheels wobbled around like crazy and i suspected the machining i'd done on the bush.......turns out the spindle was bent!! Put a dti on the spindle
My Bosch angle grinder and Bosch discs work fine. I've tried cheap ones before and found them lacking. Buying some well branded discs will probably help, Norton are used at work and receive no complaints.
Just take it back, not fit for purpose. sale of good act.
quote:
Originally posted by Myke 2463
Just take it back, not fit for purpose. sale of good act.
Had this issue recently with a £30 Chinese eBay jobby.
Turns out the washers holding the left hand grinding wheel on were about as bent as a 9 bob note! Quickly turned up a couple of replacements on the
lathe and it was right as rain