Large dyneema chafe sleeves

[earthbm]

I need to make some new strong loops and want to make them bigger. The largest NE Ropes sleeve (C1930-10-00600) that West Marine carries seems too small still, smaller than than the 12-16mm advertised diameter. I guess they are measuring width when flattened rather than diameter?

Is there a source for larger dyneema sleeves?

[thinwater]

Originally Posted by earthbm

I need to make some new strong loops and want to make them bigger. The largest NE Ropes sleeve (C1930-10-00600) that West Marine carries seems too small still, smaller than than the 12-16mm advertised diameter. I guess they are measuring width when flattened rather than diameter?

Is there a source for larger dyneema sleeves?

By diameter. However, unlike rope cover, the sleeve is tightly woven and will not "bunch-up" to a larger diameter, like rope. If it were loose enough to bunch up it would not wear as well.


The only solutions I know for bigger are the cover from a large rope and tubular webbing, but both have limitations.

[CatLove]

New England makes a larger 20mm sleeve but it's black.
https://www.neropes.com/product/hmpe...-chafe-sleeve/

[earthbm]

Originally Posted by CatLove

New England makes a larger 20mm sleeve but it's black.
https://www.neropes.com/product/hmpe...-chafe-sleeve/

Does it matter that his sleeve is “HMPE” while dyneema is “UHMWPE”? Something in the word “ultra-high” makes me sleep better under the rig.

[CatLove]

Originally Posted by earthbm

Does it matter that his sleeve is “HMPE” while dyneema is “UHMWPE”? Something in the word “ultra-high” makes me sleep better under the rig.

A loy of times these terms are used interchangeably by vendors.
Both the Dyneema and the HMPE NE sleeves list the same weights per foot for same diameters so it may be the same fiber.
Why not call NE, your chances to get resolution are much better than asking on forums.
I had to deal with them (in a professional situation for a custom product recurring order) and it was easy to get to speak with their engineers .

[Benz]

There are many Dyneema sleeves out there, as well as HMPE, HDPE, HMWPE--all acronyms for essentially the same chemical composition. It's High Molecular Weight (or Density) Polyethylene. Dyneema is a trademark name, as was Spectra. HMPE is simply a generic for the same. Nexsteel, Acera, Styrotex--all different makes of HMPE. What you get with the Dyneema name is the assurance of quality: that it was made in one of DSM's plants. There are generic Chinese HMPEs out there ("Chineema") of unknown quality.

Marlow makes sleeve in sizes up to 32mm. Be aware that nominal sleeve sizes vary wildly from maker to maker. The Cousin 6mm is bigger than Marlow's 8mm. Whether actual Dyneema or HMPE for chafe sleeve is pretty immaterial, since the cover is usually not load-bearing, and most have the same chafe-resistant qualities.

Dynamic Yacht Rigging is Portsmouth, RI, carries every size of chafe sleeve in nearly every brand. No webstore: you have to call and know what you want.

Kingspoke Marine in Middletown is another good source.