Surface Grinder coolant aim?

[Dave SParticipant @daves59043]

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?

Dave

[Dave SParticipant @daves59043]

[Tony Pratt 1Participant @tonypratt1]

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

Tony

[SteviegtrParticipant @steviegtr]

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.

Steve.

[SteviegtrParticipant @steviegtr]

As Tony says.

Steve.

[Neil LickfoldParticipant @neillickfold44316]

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 PParticipant @johnp77052]

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

vimeo.com/196029009

John

[Michael GilliganParticipant @michaelgilligan61133]

Excellent reference, John … Thanks

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

MichaelG.

[Dave SParticipant @daves59043]

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.

Dave

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