brake calliper mounting plate/bracket.

[tony b]

hi all ,im after a2convertion plates to mount a golf calliper onto my reliant axel,im offering a set of gpz 600r forks as a swap ,any takers ,regards tony b,shabba.

[Manky Monkey]

Tony, I spoke to SaddleBags last week & he's added 6 more sets of caliper plates to his ever growing waiting list of private jobs. These are done in his own time after normal work hours & I know the waiting list is literally several months long. If you can wait, they'll be up for sale for whatever he charges me.
If anyone else has CNC maching capabilities, this is the diagram Mr Bags drew for me. It's for the 10mm aluminium version of the plates. Only thing it doesn't show is the 3mm recess round the centre hole that locates over the flange on the end of the axle. It's 98mm in diameter if I remember correctly. My original steel plates were just flat 7mm plate as shown.

[Manky Monkey]

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[Dicky]

MM, was there ant reason you went from 7mm to 10mm?  Material available? or something more technical?

[Manky Monkey]

The originals were steel, made by me in the shed & cut by hand with a hacksaw then hand-filed to shape. Not recommended unless you want biceps like Popeye.
7mm seems a strange size -I suspect they were actually 6, powder-coated. Scott made the new improved versions at work & 10mm aluminium was more plentiful than steel. The stresses are mostly sideways, (the forward motion of the trike trying to turn the plates with the wheel), rather than across the thickness of the plate, so ally's plenty strong enough according to Scott & he's a clever engineering type chappy so he should know. The 10mm aluminium was recessed 3mm to slot over the end of the axle tube, which took the effective thickness down to 7.
At the end of the day, you only need to centre the caliper over the disc, so you could use 5mm plate with a couple of spacer washers to bring the caliper out further, or 8mm with the top edge ground back to take the caliper back inboard. As long as it's central over the disc that's all that matters.