Time TBT cleats

[latman]

I recently realised i was in trouble with the wear on my front cams so I decided to make up my own Epoxy resin / carbon fibre ones .

 

[latman]

maximum attachments is 8 , who knew that!

 

[rusty bodie]

Re:

is that the same skin safe stuff they use to make those clone-a-willy kits?? i'd need to be sure of it's non-caustic properties before giving this a bash. :shock:

on a safer note, yes the time cleats are becoming a bit thin on the ground of late. the mk2 version of the forward cleat was made in alloy as the mk1 plastic ones got easily ruined, as you've no doubt found out.

what kind of caust, er, cost is your willy kit, ahem. . . silicone moulding kit??

 

[latman]

in australia the silicone kit cost me $60 ish , i think there must be alternatives that would do the same thing ,it just needs to flex to cope with the undercut

 

[mattr]

Wouldn't it be easier to do a 3d scan and get some machined up. Once you've got the model, it'll be easy to make as many as you want.....

 

[latman]

I suggest no but why don't you just try prove me wrong ,the advantage of machining one up is the large amont of billet materials available , other than that you need either a 4d cutter or a complex fixture to hold a small item so a 3d cutter can make the undercut , I wonder why time cast them back in the day ?

 

[mattr]

I'd suspect they were cast (or injection moulded) as that was the cheapest way to produce that sort of volume of parts. A 4 axis machine in the 80s was slow and expensive. Multi Million pound investment sort of thing.

I know you can buy a 4 axis machine for a couple of grand these days, it'll only have something like a 200*200*75 capacity, but what else do you need in your home workshop? (I know of at least 3 people with 3 and/or 4 axis machines at home)
And fixturing wouldn't be particularly tricky seeing as you have a couple of locating holes in the middle.

Could get it 3D printed as well.

 

[latman]

I'd suspect they were cast (or injection moulded) as that was the cheapest way to produce that sort of volume of parts. A 4 axis machine in the 80s was slow and expensive. Multi Million pound investment sort of thing.

I know you can buy a 4 axis machine for a couple of grand these days, it'll only have something like a 200*200*75 capacity, but what else do you need in your home workshop? (I know of at least 3 people with 3 and/or 4 axis machines at home)
And fixturing wouldn't be particularly tricky seeing as you have a couple of locating holes in the middle.

Could get it 3D printed as well.

For the small number needed 3D scanning and machining will be too expensive and the ABS plastics that are used for 3D printing would be too weak IMO

 

[latman]

i just silicone mouled a rear cam the other night (with a few mods to minimise the lateral play) so it will be interesting how it feels

 

[mattr]

For the small number needed 3D scanning and machining will be too expensive and the ABS plastics that are used for 3D printing would be too weak IMO

Your first sentence makes no sense. 3D
scanning and then machining is the go to method for small volume prototyping of this sort of thing, nothing else comes close on price or accuracy. And costs have come down massively in the last couple of years as well. (Probably not far off halving as far as 3D scanning goes.)

And as far as 3D printing goes, you need to choose the right material.........