Cause and effects of milking, some thoughts.
Look for the FOAM gloves, they are so much better then just latex coated. They last much longer and they're actually a little warmer in the winter. These are Wells Lamont and last year Costco had them in the spring, but I think you can get them on Amazon too. Yes, I simply cut off the fingertips.What kind of gloves are shown in the video? They look a lot like the Hardy polyurethane coated nylon gloves I buy from Harbor Freight for two dollars with the finger tips removed. I throw them away after five or six climbs, but they're comfortable and grip rope very well. How long does the poly coating last on those?
I had a line like that... I spiked the line and it didn't hurt the cover, but cut about a third of the core strands. When I would descend below that spot, the core would narrow down and the cover would slip (milk), but only below that spot. I cut that whole section off, and still use the rope. It's about 115' long, now... but very much usable....that feels narrow...
I did a lot of breaking on a particular rope and seldom could I get close to the breaking strength listed. The cover would let go at about half the listed strength, releasing the tension, then rebuild until the core would let go, again, at about half the rated strength. In practical use I suppose it provided a shock absorption quality but I suspect that only in very controlled circumstances could the actual required breaking strength be obtained.... A new rope gets stronger with use (until it doesn’t), as the core and cover comes into equilibrium the rope will reach its peak breaking loads.
No, some of the test were under different circumstances and this is a general observation. Some were tested over a bollard or drum, some the knot, some splices or sewn eyes. It is my feeling that there is a lot that goes into the failures and I would agree that the tension and coefficient of friction between the core and cover would certainly effect the breaking strength.Did they all break in the same general area?