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Surface Grinder coolant aim?

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Dave S12/05/2021 21:49:18
225 forum posts
47 photos

Evening all,

I have a 540 surface grinder, and to help keep the dust down, and give better finish I run a coolant hose on it. I guess it's a flood system, although I have to be careful not to open it fully as it pumps faster than the table drains.... Then it would be a proper flood.

Anyway I currently have the linelok aimed roughly at the grind zone from the back of the wheel - so the coolant is flowing in the same direction as the wheel is running.

This seems to work ok,but i wondered tonight as i was grinding an old crankshaft of i should really aim the coolant against the rotation?

Any comments?


Tony Pratt 112/05/2021 22:40:02
1692 forum posts
8 photos

Yes coolant flow same as wheel direction, so coming from the right , extractor pipe on the left


Steviegtr12/05/2021 22:41:23
2243 forum posts
311 photos

When i was a maintenance sparky in an engineering environment , they had a few surface grinders. They all aimed the coolant at the back of the job in hand I.E coolant dragged around the surface being ground. They were pro's.


Steviegtr12/05/2021 22:42:04
2243 forum posts
311 photos

As Tony says.


Neil Lickfold12/05/2021 23:03:27
720 forum posts
127 photos

I always aim the coolant between the wheel and the workpiece , and use a nozzle that covers the entire wheel width. So I don't use the round nozzle from the lockline kit but use the wide blade type and modify the width etc to create the fan I need to suite the wheel and the job. Surface or Cylindrical, it is the same basic principle. Internal wheels are alot more difficult to aim the coolant correct. And like all have said, the direction of the wheel drags the coolant with it. Grinding, it is important to have a good filter and supplying clean coolant. Often bad surface finishes come from contaminated coolant that gets between the wheel and the workpiece, and will leave either a radial line like a mini gouge line or on the surface, will leave a line corresponding to the piece of junk that either went through while grinding, or got stuck onto the wheel and it keeps repeating this short marks of a deeper grinding score. Looks like a newly dressed wheel that was not cleaned after dressing look.

John P13/05/2021 08:38:58
328 forum posts
226 photos

See this video for the explanation of positioning and coolant
flow,other videos is this series worth watching for other grinding


Michael Gilligan13/05/2021 08:46:56
18932 forum posts
943 photos

Excellent reference, John ... Thanks

It’s good to see presentation to that standard amongst all the dross on t’internet.


Dave S13/05/2021 12:43:25
225 forum posts
47 photos

Thanks, I can see me remaking the coolant delivery pipe to be better placed.

I think I have a new set of videos to watch now.


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