Replacement roller for bow roller

[colhel]

I made this one from nylon due to the hammering a bow roller gets. But am open to suggestions for improvements. Dipper; I can't get your link to work

 

[Dipper]

I made this one from nylon due to the hammering a bow roller gets. But am open to suggestions for improvements. Dipper; I can't get your link to work

Strange. It works on my PC not on my Hudl.

Try this http://www.directplastics.co.uk/ then choose 'Engineering plastics'.

 

[DinghyMan]

I've an idea that delrin is a better material than nylon for this application.

Delrin is more stable over time, slightly more UV resistant, absorbs less water, and swells & changes shape less but given the intended use probably none of which make much difference.

If you want one to last ages make it from delrin/acetal with a centre brass/bronze tube for a bearing, in the real world just make one from a nylon offcut

"Nylon" is used as a generic name for many different grades so the grade chosen also makes a big difference and you can get many different grades with very different properties

http://www.metals4u.co.uk/ are usually pretty good but check ebay for short offcuts

If you are really bored: http://www.machinist-materials.com/comparison_table_for_plastics.htm