Chinese draft angles

.

possibly JD2 … but the general shape of the casting looks pretty convincing

MichaelG.

But is it a casting? or just the corner of the plastic moulded VFD casing.

Ian P

.

Presumably the latter, Ian

I was concentrating on the geometry and probably used the wrong term.

[ shame on me ]

MichaelG.

I dont think I would ever use a bolt that fits the slot, all the work fixings I use on the mill is far smaller than the slot width. I use mainly M6 to M8 to the odd M12 (and imperial equivalents). I have just measured the lot width on my set of four Eclipse 302 angle plates (picture below) and its 17mm at the face, narrowing to about 15.5mm mid thickness.

Setting up jobs can be quite fiddly, if I use M8 or M10 bolts the washers have to be specials to span the 17mm slot and the bolts then can be a long way from the end of the slot (so I have flats on the washers). As manufactured the slots do not suit any standard bolts unless one sacrifices some of the slot length.

Ian P

Yeeeeee-har!

I now have 8.5mm for the 5mm bolt heads, I shall have to turn something down to fit

Here's the jig...

The VFD is held down by a lump of iron and a towel, but it is located by a 5mm pin coming up from below.

Above it is a virgin Dormer 8.5mm drill bit aimed exactly at the 5mm pin below.

A slow vertical feed on the knee and lots of revs on the bit for a smooth finish.

There was 3mm of plastic behind to cut in to and I took half of it. One VFD done, one to go

Nicely done, Robin

… pity the manufacturer couldn’t cope

MichaelG.

I have had this problem almost identical. A few swipes with a round file was all it took to remedy.

The OP though had already prepared tapped holes in precisely the right positions based on the VFD holes, so the round file/hole dragging technique would not work.

Ian P

I am now waiting for M5x16 Pozi cheese heads (50 for £2 with free shipping) before I can wire it up.

While waiting I am de-clattering my splines and fitting a spindle lock.

Will I live long enough to finish this thing?

Robin

No, it would indeed require the foresight to look at the casting and realise that there was no space for a screw head. You'd have to slot the housing before drilling the fixing holes.