Selden Low Friction Rings

Black anodised aluminium

Large inner radius for low friction

Select by internal diameter:

Internal ØMaximum Line Ø
5mm3mm
8mm5mm
11mm7mm
16mm10mm
22mm14mm
30mm20mm

£ 16.40 inc VAT

Calculate Delivery Cost

Selden low friction rings are an extremely versatile and lighter alternative to a plain bearing block.

Selden rings are produced in black anodised aluminium, have a big inner radius for low friction and an outer slot for rope or shock cord attachment to e.g. a deck or mast fitting

Suitable applications are backstay cascades, barber haulers, tweakers, kicker/vang purchases or any other control line lead with a static load.

Low friction rings are not designed to replace ball bearing or roller bearing blocks where free running or continuous adjustment under load are required.

Selden Low Friction Rings Specifications
SeldenInternal ØMaximum Line ØSWLMBLOutside Ø
420-5005mm3mm150kg300kg12mm
420-5018mm5mm350kg700kg18mm
420-50211mm7mm750kg1500kg25mm
420-50316mm10mm1500kg3000kg35mm
420-50422mm14mm3000kg6000kg50mm
420-50530mm20mm6000kg12000kg70mm

Internal Ø = the internal diameter of the hole inside the ring
Maximum Line Ø = the maximum diameter line that Selden recommend to use through the ring
SWL = Selden Safe Working Load (2:1 Safety Factor)
MBL = Manufacturer (Selden) Break Load
N.B. Outside Ø is actually the outside width dimension across the ring

Barber Hauling or Tweaking is a good example of where low friction rings provide an ideal solution:

Selden Barber Hauler DiagramSerlden Low Friction Ring

Barber Hauling, also known as "Tweaking" is the general term for applying downward pressure on a headsail sheet and/or pulling the clew to windward to improve the slot and increase leech tension.

Reeeve the ring onto the sheet, attaching the tweaker line to a strongpoint, suitably poisitioned inboard and aft of the mast step, one on either side of the deck to create a 2:1 purchase on the sheet.

Improved sail trim can then be achieved by tensioning the tweaker.

Stretch a bungee (elastic cord) from the ring to a shroud high enough to prevent the ring knocking the deck when it is not in use (lazy).

You may also like