Flat Belt Pulley - plastic (maybe aluminium)

[puffernutter]

Anyway there is a supplier near me that has delrin offcuts 2- 8" at a reasonable price, I'll have a look, Im happy to turn a few pulleys from a piece. I imagine you'd want a wide concave or V rather than flat faced. Plastic will give a lower mass and better acceleration.

If you can have a look that would be great. Thanks. I guess around 150mm diameter feels about right? Slight V for 3 idlers and flat with a friction surface (e.g. rubber) for the drive pulley. It has to cope with the knot and poo bag flying past it!

Cheers

Peter

 

[slim_boy_fat]

@puffernutter How many would you need and to what timescale? I might have a few plastic pulleys of around that size in the cave.

I bought them 'because they might be useful one day' but don't recall ever actually using them. Might be as many as half a dozen.

If it ever stops hissing down, I can have a search amongst the detritus out there.

 

[slim_boy_fat]

@puffernutter Ref ^^, the weather Gods listened to me for 5 minutes, so I girded my loins and made a breenge [for those 'darn sarf', a good Scottish word CLICKY ] which yielded this.

O/D is 3.75 inches [or 95mm if you prefer ] - obviously 9 in total. If these are any good for your purposes let me know. I can't remember what I paid for them, nor do I have any idea what they might be worth now. Been in 'storage' for years......

 

[Kram]

^ those look ideal, atleast as the idler pulleys.

If you can have a look that would be great. Thanks. I guess around 150mm diameter feels about right? Slight V for 3 idlers and flat with a friction surface (e.g. rubber) for the drive pulley. It has to cope with the knot and poo bag flying past it!

Cheers

Peter

Acetal Rod various larger diameters and lengths | eBay

ACETAL Rod.

www.ebay.co.uk

Delrin Rod 200 mm diameter x 38 mm long Natural (white) | eBay

DELRIN Rod. Natural (White) only.

www.ebay.co.uk

160mm x 70 long for £12
85 x 220 long £16
200 x 38 for £10
Its good stuff to turn if you have a lathe.

It would be a pain to rethread, unless it was double length on another driven spool to run in reverse. Or you could rethread it each time, I guess the owners need exercise too!
The drive wheel, I see two ways to do it. A big loop with a mig wire feed style rollers to pressure drive it, or a big spool/pair of spools that pull the string in.

 

[MattF]

O/D is 3.75 inches

Don't you mean 3¾"?

 

[slim_boy_fat]

Don't you mean 3¾"?

I did, but for some reason I don't have 'sub script' capability on the choice of font size on the forum - when I try it it comes up as 33/4", which looks cumbersome and might be open to misinterpretation.

 

[MattF]

If you're using a phone, just keep your finger pressed on the relevant number key, until it gives you a choice of fractions, based on that number.

 

[puffernutter]

@puffernutter Ref ^^, the weather Gods listened to me for 5 minutes, so I girded my loins and made a breenge [for those 'darn sarf', a good Scottish word CLICKY ] which yielded this.

View attachment 313850

View attachment 313851

O/D is 3.75 inches [or 95mm if you prefer ] - obviously 9 in total. If these are any good for your purposes let me know. I can't remember what I paid for them, nor do I have any idea what they might be worth now. Been in 'storage' for years......

They look ideal, PM me please and we can sort out the niceties!

Thank you.

Cheers

Peter

 

[slim_boy_fat]

They look ideal, PM me please and we can sort out the niceties!

Will PM shortly

EDIT: As long as the Mods [ @Wozzaaah ] don't say I should list them in the 'For Sale' thread? If they do, you'll have precedence - I wouldn't have been selling if you hadn't posted......

 

[slim_boy_fat]

If you're using a phone, just keep your finger pressed on the relevant number key, until it gives you a choice of fractions, based on that number.

Not on my phone, a Lenovo Android tablet is my alternative for interweb besides my desktop.

 

[MattF]

Tablet should work the same as a phone.

 

[slim_boy_fat]

Tablet should work the same as a phone.

Thanks. TBH I prefer the pc to the tablet as it's easier to transfer pics off my phone, and copy/paste if necessary without having to d/load. Yes, I'm a dinosaur..........