Angle Grinder Question

red_diesel

I know its not really the forum buts its for use on my farm and I know Farmers are in the know about this kind of thing.
Bought a new cheapo 9" grinder. When I turn it on the disc appears to wobble slightly. Doesn't look right. Can't notice it as much when it reaches full speed. Now I've used small grinders loads and I have the nuts on right etc so its all hooked up correctly.
Is a slight wobble normal? I'm seriously thinking of returning it.

my3cents

Zero wobble! Check with another disc and that you have seated the bushes correctly. Its possible to get the bushes that hold the disk on the shaft in the wrong place and when you tighten up the outer one the disc isn't square on the shaft.

red_diesel

my3cents wrote: »

Zero wobble! Check with another disc and that you have seated the bushes correctly. Its possible to get the bushes that hold the disk on the shaft in the wrong place and when you tighten up the outer one the disc isn't square on the shaft.

Yeah I've tried 3 disks at this stage, and all the same. I'm pretty sure all the nuts are lined up correctly.

Zr105

red_diesel wrote: »

Yeah I've tried 3 disks at this stage, and all the same. I'm pretty sure all the nuts are lined up correctly.

Is there any wobble in the shaft? Can you wobble the edge of the disc when it's clamped up tight?

my3cents

red_diesel wrote: »

Yeah I've tried 3 disks at this stage, and all the same. I'm pretty sure all the nuts are lined up correctly.

Any chance the inner "nut" is the wrong way around, it normally just slips on and engages on part of the shaft so it can't turn.

red_diesel

Zr105 wrote: »

Is there any wobble in the shaft? Can you wobble the edge of the disc when it's clamped up tight?

Yes there does appear to be a slight wobble in the shaft. I can see this when I turn it on slow. I think it'll be goin back.

my3cents

How much was it? You can get a decent Hitachi one that will take some abuse for around €100 in a lot of the bigger builders merchants.

djflawless

Not the sort of thing you want to be holding if it goes wrong.
Shaft could be missing a screw inside or have defective bearing as factory error.
Best off returning asap

red_diesel

my3cents wrote: »

Any chance the inner "nut" is the wrong way around, it normally just slips on and engages on part of the shaft so it can't turn.

No definitely, on the right way.

red_diesel

my3cents wrote: »

How much was it? You can get a decent Hitachi one that will take some abuse for around €100 in a lot of the bigger builders merchants.

€57. Get what you pay for I suppose.

Genghis Cant

red_diesel wrote: »

Bought a new cheapo 9" grinder.

I think you found out why it was a chepo.

It should run true, smooth and wobble free.

Bruthal

Dont use it with a wobbling disk anyway.