johnsmachines

machines which I have made, am making, or intend to make, and some other stuff. If you find this site interesting, please leave a comment. I read every comment and respond to most.

Tag: Sugru

Flywheel and Sugru

Firstly the SUGRU update.

Sugru, if you have been following this blog, is the flexible black insulating repair compound which I used to repair some electric cables on my lathe.   The cables supply power to the stepper motors, so they are in constant flexing motion when the lathe is operating.  I wondered whether the Sugru would remain adherent and intact.

Well, I am pleased to report that after several weeks use, the Sugru looks as good as the day I applied it.  A winner!

The flywheel.

This is the flywheel after some sanding and polishing with a Dremel.

IMG_3139

The 100mm flywheel, with lubricant ready to be applied.

I might have to make another Stirling engine to use it.

SUGRU

Yet another acronym for my non responding brain to memorise?

No, Sugru is a new product,  a self-setting rubber compound, which I tried after seeing a description in “Model Engineers Workshop”.

It is described as being adherent to many materials, including metals, glass, wood, fabrics, plastics.

It remains tough and flexible after curing.

Cures at room temperature.

Mouldable by hand.  Waterproof.  Electrically insulating.  Temperature tolerant -50to +180 centigrade.  UV resistant.

Available in various colours.  I ordered black.  Got 3 small sealed packets of 5gm each.  Cost ~$au20 inc postage.

Once opened, the material should be used within 30 minutes.  Cures within 24 hours.

Shelf life about 1 year,  three times longer if kept in the fridge.  (seek medical advice if swallowed)

So I tried it, and it looks good.  Handles like slightly sticky PlayDoh.  Washes off the finger easily.

The before.  This the Z axis stepper motor on my Boxford CNC lathe.  The lathe is 30 years old, so it is not too surprising that the plastic cable coating is becoming stiff and peeling back.

The before. This the Z axis stepper motor on my Boxford CNC lathe. The lathe is 30 years old, so it is not too surprising that the plastic cable coating is becoming stiff and peeling back.

The product..  SUGRU.  Funny name.  Invented by Jane and "Made with love and science in the UK"

The product.. SUGRU. Funny name. Invented by Jane and “Made with love and science in the UK”

The after.  Looks good now.

The after. Looks good?. I will report how it stands up to constant movement and flexing in a few weeks.

IMG_3033

Another after. Once the sealed packet is opened, I presume that the Sugru sets. So I applied some to the X axis cable.