clarkson wheels

on mk 1 clarkson tool/cutter grinder ibought can i fit 6" wheels?

will make new guard for it.

just struggling to find wheels for it.

I think a 6inch wheel is fine but check the spindle speed. I think it may be written on the head.

I would think so as well; I am no expert so take my advice with caution. The Mark1 machine came with a 1/4inch thin, 5 inch wheel. The basic original guard consisted of a small arc of steel, similar to a mudguard. Later ones came with a more substantial hood. So yes you will probably have to redo your guard. Off the top of my head, the machine is 2800rpm motor, 4000 rpm spindle speed with the original pulleys. If you have a beat up old machine then check your motor and pulleys in case they have been changed/replaced and are giving a different speed. I did temporarily mount a 6 inch wheel with some flanges once and used that for a while. If I remember correctly, with a thick wheel and flanges there was not much room left to do the nut up, and if I remember it did not feel 'right' having that size on it (but it might just have been my ignorance). I easily found some small cup wheels on ebay (if you dare!). I got some 3 an 4 inch cup wheels from a local engineering supply firm; the type that supplies tools, materials, and consumables to workshops. Depends what you want, but maybe consider the aluminium diamond wheels from Chronos etc

Also consider using adequate flanges to support the wheel. A read of the Factories Act and regulations may shed more light, as you have to be competent to mount a wheel. Below is a page from the March Operators manual (not Clarkson but virtually the same) . Maximum wheel width at bore 1/4inch!

Clarkson recommended wheels - sorry its sideways!

I bought assorted (cup, dish and straight) wheels for my Clarkson from these people:

**LINK**

Andrew

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Is there a typo on that sheet from March ? ... I would expect to see a Minimum specified for 'wheel width at bore'.

MichaelG.

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P.S. ... Latest guidance from HSE is available here.

Edited By Michael Gilligan on 23/07/2015 06:14:34

cheers for that.

will look at the 6" as got loads of new ones from when old place closed down.

have done the course for wheel changing at rospa.

Hi Michael

Thanks very much for that HSE link, interesting reading. And an interesting point you raise about the wheel width (thickness) at the bore. In that HSE guide, the section on mounting and spindles states the following:-

Spindles
33 The spindle should be long enough and threaded to a sufficient length to
ensure that when the wheel and flanges are mounted, there will be enough thread
for full engagement of the nut on the spindle. The thread should extend inside the
flange but not into the hole in the wheel.

The last sentence is interesting. I just measured the unthreaded portion of the end of the Clarkson spindle and it is around 10mm. So, I deduce that a wheel should be no wider (thicker) than 10mm at the bore, else a portion of the wheel bore will sit on the threaded portion of the spindle.

So it seems to me that it is not right to put a 6 inch diameter wheel, 20mm wide on there (which is in fact what I temporarily did with unease).

Steve

Hi,

There are plenty of 5" options about. In addition to the references above Machine spares sell appropriate dish and cup white wheels direct and also via ebay.

If you use a raising block to accommodate a 6" wheel, won't your tooling and work piece be at the incorrect height and need raising? I think the MKIII has a 6" wheel and the tooling for that is all larger. Please educate me if I am wrong.

Thanks,

Steve