FW Spinner Advice please :-)

[Tim The Plumber]

Can you extend the shaft through the supporting "forks" and then have it secured with something like a nut or something? As then any sideways forces will be taken by both sides of the forks rather than just one.

Possibly putting a bolt into the shaft at each end and having a washer stop the shaft from sliding into the fork.

[MattLampitt]

Good idea spreading the side load between the bulkheads, I didnt think of that. But not sure how well a bolt in each end would work as the shaft would be spinning.

Say I put a 10mm thread in each end and put a 10mm bolt through the retaining plates I already have there. That would do it maybe??
Hinm i would need a bearing in between the bolt head and plate though otherwise there's a chance the bolt would undo due to the spinning shaft.

[Tim The Plumber]

What do you have between the shaft and the forks at present?

If you have a retaining washer bolted onto the end of the shaft it will only rub against the face of the fork when it is pushed against it. If it's oiled then for the duration of it's life wear should not be that big an issue. Let's face it, it will be lucky to work for half an hour in total.

[typhoon_driver]

I think your assembly will be too heavy. 30mm thick hardox disc at that diameter will take most of your weight even with huge holes in it. 25mm bulkheads I'll be surprised if you can fit in there too.

[MattLampitt]

This is good... this is the kind of pointers I need :-) thanks lads. Seems I'm thinking a little too big for FW haha.
i was going to do weight calculations and adjust bulkhead thickness and disk thickness to suit.
So, If I put some retaining bolts in each side so spread side load is this then a viable weapon assembly then?

[Flag Captured]

Just for a sense of perspective, my featherweight drisc (180 diameter) has 6mm hardox bulkheads and equivalent of about 16mm disc, and my larger spinner (also featherweight but 300mm diameter) has 20mm HDPE bulkheads and an 8mm thick disc - the latter setup being based on Inertia XL which did a good number of events without breaking too heavily

So in a nutshell I'd agree you're thinking too big haha, 15mm aluminium and a 15mm or so disc should see you sorted I think depending on your disc design. Would also heavily recommend a dead shaft over a live one - it increases the strength of the bulkheads massively for if you take a hit from a horizontal spinner

[MattLampitt]

Ohhhhh yes... more strength because the fixed shaft is acting as a brace between the 2 bulkheads. I get your thinking :-)
thanks everyone for all the tips. :-)