I didn’t catch what the material actually is.

We used to use various forms of Turcite around 30 odd years ago, mid 90’s to about 2000. Some were metal filled, others had different fibres added etc.  Then went back to bronzes, like LB2 and Ali Bronze. Now we buy the bronze with the carbon rod through it. That seems to last the longest for bushes on hard steel pins. The moulding machine platterns and tie rods , use the carbon plugged Ali bronze bushed. The bushes were still within the original machine specs, and the rods/bars needed to be replaced in the service last year. Normally it is both bushes and the rods/tie bars are replaced after about 6 years or so.

Anyone holding rectangular stuff in a three jaw chuck, or using a tap as a centre punch should be taken away and chastised severely

Its supposed to have 10x the wear resistance of bronze.

Some stated advantages over metals:

On 7 November 2024 at 08:29 larry phelan 1 Said:

The big question is—how much is it ????

And where can it be bought?

Looks like a decent enough engineering plastic to me, though the claim that it replaces Bronze is surely hype.

I thought the demo at the end showing the plastic nut had zero backlash was misleading.  Not difficult for a new nut made of anything to pull that trick.   What I want to know is how long the plastic nut lasts doing real work before the thread wears.  And how does it compare with Bronze doing the same duty.

Might well perform better than Bronze for this particular function, in the same way Kevlar and Carbon Fibre both outperform steel in certain applications.  Won’t be magic though.

Amusingly, one of my design books recommends using plastic wherever possible.  The main exception is a recommendation to use “metal to create the illusion of quality”.  It applies to many household objects.  Fans of traditional metalwork are invited to dissect their vacuum cleaner.  Do so and weep…

🙁

Dave

Based on the name I would assume that the compound in question is an aromatic polyamide or aramid, as is Kevlar. It is likely however that there are differences in molecular structure between the two – if only for patent reasons.

Perhaps more critical issues are how the amide fibers are bonded, epoxy? nylon? acetal? to create a fiber filled solid and also how much fiber is in the mix. These will affect both wear and slipperocity (new term for the occasion).

From a quick internet search Kevlar seems to be readily available in solid form as Kevlar filled nylon – at eye wateringly high prices!

Pero

On 8 November 2024 at 01:25 Pero Said:

[…] Perhaps more critical issues are how the amide fibers are bonded, epoxy? nylon? acetal? to create a fiber filled solid and also how much fiber is in the mix. […]

?

According to the bullet-points that Bill posted … it’s homogeneous

I wonder: at what level of detail ?

MichaelG.