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Grating holder
Mark,
I'd recommend the Optometrics 30 x30 grating, (cheaper than Enmunds!)this is usually 6mm thick.
The mounting I use is a piece of 25mm diameter aluminium bar 45mm overall length. The shaft is 8mm bright steel, so the mounting is drilled on centre 8mm.
To support the grating I've milled a "slot" 18.5mm deep ( 12.5 + 6) by 30mm long. This leaves a D shaped land about 18mm wide. Two 3mm tapped holes in the base lock the mount to the shaft, giving a centre height for the grating of 30mm ( hence the 60 x 60 box construction)
The grating is then mounted central to this land using a couple of strips of double sided tape.
The article will have some more detail on the mounting and enough info to build one!
If the demand was there ( minimum of 10) I could make up a kit of parts.....
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