Weight Watchers - Forged Carbon Fiber

[Mr Gazza]

Delrin was suggested to me by Darren as a potential material for Headlamp rings. It turned out to be unsuitable for that and more expensive than what I already use, but I think it would be ideal for the lever bush as it is self lubricating if I recall correctly.
I'm sure Nylon would be fine on a low stress part like that though.
You might even be able get one off the shelf based on the id.

Is the peg cf too? Or aluminium?

I'm just interested if you have a bleed hole in your mould press, for surplus resin and air to escape, or if you carefully weigh out just the right amount of resin?

I like it and I'm sure you will find a few more bitz and pieces to make now..

[Mr Gazza]

Just googled "Delrin bushes" and a vast multitude came up, so I'm sure you could get something the right size for under a fiver.
Also found a material I hadn't heard of before that sounds interesting with probably more choice of bush sizes.


igus® iglidur® FDA Bushes are available in a choice of 3 materials (iglidur® A180, A200, and A500). The bushes require no lubrication. The appropriate iglidur® material to select depends on application:

iglidur® A180 is suitable for general/waterproof use within environments where foodstuffs or drugs are present, and where low water absorption properties are required
iglidur® A200 is also suitable for foodstuff environments (in direct contact with food), where dirt needs to become embedded, and where low to medium load applications apply
iglidur® A500 is the choice of bush material to select where high temperature, chemical and high load resistance is required. iglidur® A500 bushes are also suitable for use within foodstuff environments, and offer good abrasion resistance.

Leading companies across the globe specify Delrin® acetal homopolymer from DuPont for high-load mechanical applications such as gears, safety restraints, door systems, conveyor belts, healthcare delivery devices, and other demanding products and parts. Delrin® acetal homopolymer (Polyoxymethylene POM) is the ideal material in parts designed to replace metal. It combines low-friction and high-wear resistance with the high strength and stiffness such applications require. It provides a wide operating temperature range (-40 °C to 120 °C) and good colorability. Delrin® also mates well with metals and other polymers and offers excellent dimensional stability in high precision molding.

[Bitza]

Originally Posted by Mr Gazza

Delrin was suggested to me by Darren as a potential material for Headlamp rings. It turned out to be unsuitable for that and more expensive than what I already use, but I think it would be ideal for the lever bush as it is self lubricating if I recall correctly.
I'm sure Nylon would be fine on a low stress part like that though.
You might even be able get one off the shelf based on the id.

Is the peg cf too? Or aluminium?

I'm just interested if you have a bleed hole in your mould press, for surplus resin and air to escape, or if you carefully weigh out just the right amount of resin?

Yup peg is turned cf.
No bleed holes, you need to calculate weight of fiber carefully (if the volume is say 100ml/cm3, the density of forged CF is 1.4, so 140 gms, of which 60% needs to be fibers in this example 84gms, the resin volume needs to be well in excess of the finished %, and the excess will be forced out of the gap between the mould halves as you very slowly compress them together giving an opportunity for the fibers to move. Easy Composites do some excellent vids on youtube on the subject, in fact they taught me all I know.

[Jez900ie]

Impressive work Bitza.