Description

JPL3/5 chains, that were woven near the high AR limits of JPL - these have the big advantage to behave very 'fluid', so e.g. pendants hang in a perfect triangle and not in a more or less large bend.

Left/bottom: JPL(3) made from stainless 1.0mm coiled on 3.0mm mandrel, final AR around 3.40 - this one is VERY near the AR limit, where rings would begin to slip.
Right/top: JPL5 made from stainless 1.0mm coiled on 3/16" mandrel, final AR around 5.30 - this one has not yet reached the high AR limit.

The basic rule for theoretical high AR limits of JPL family is JPL number PLUS 0.5; but one must stay a bit below, as even minor ring shape irregularities can lead to ring slips. The theoretical low limits were JPL number MINUS 0.5; but these must be higher, as followup rings do not intersect at 90-degree angle, but 'higher' JPLs approach that ideal. So here the practical limits are ~2.65 to ~3.45 for JPL3 and ~4.55 to ~5.40 for JPL5. Predicted (not tested) AR limits for JPL7 were 6.55 and 7.35, and so on for the 'higher' JPL family members...

Weave(s) Used (Click to View Weave)

Jens Pind Linkage, Jens Pind Linkage 5

Images Tags (Click to Search Gallery)

Tag(s): Chain, Materials, Stainless Steel, Test
Weave(s): Jens Pind Linkage, Jens Pind Linkage 5