If your winches have seen a lot of use, I suggest you have them knurled. Mine (Lewmar STs #30 and #50) had ~ 15 years of use and I had them re-knurled with a simple vertical 'scoring' pattern of 'medium' harshness for $30 each. Too much 'harshness' will chew up your line.
They now hold as if new although in a breeze we always use more wraps. Charlie Nelson Water Phantom C&C 36XL/kcb Sent from my iPad > On Oct 5, 2015, at 11:20 AM, Josh Muckley via CnC-List > <cnc-list@cnc-list.com> wrote: > > Knurling is the process by which texture is given to metal. Usually metal > handles of wrenches and hammers or other tools will be knurled with a > cross-hatched pattern. There are lots of options and harshnesses which can > be chosen by the machinist. > > I'm not particularly familiar with the best line for friction but I would > start with something cheap like stay-set. With a little work you can > probably bury the end nearest the clew. I probably wouldn't sleeve the whole > line since it seems you'd loose some or all of the advantage of the new > high-tech line. Since the sleeve and original jib sheet will have different > elasticities I would consider allowing the sheet to "float" at the tailing > end...just a thought. > > The machine shop I use is in Lusby, MD and right around the corner from my > house. The guy is extremely knowledgeable and runs a great business out of > his garage. He calls the place "Machine Shop". His name is Harry Langly an > goes by HL. Email him at marsurl...@comcast.net or call at (410) 326-2001. > Email might be better since he had an accident years ago that affects his > voice. > > Josh > >> On Oct 5, 2015 10:30 AM, "David Knecht via CnC-List" <cnc-list@cnc-list.com> >> wrote: >> Hi Josh- great info! >>> On Oct 5, 2015, at 10:08 AM, Josh Muckley via CnC-List >>> <cnc-list@cnc-list.com> wrote: >>> >>> David, >>> >>> The screws which Joel mentioned are, from my experience, a type of cap >>> screw. You might want to remove them one at a time and lube them with >>> tef-gel, or anti-seeze. If they get stuck they break. If they are over >>> torqued they break. If they are not fully tightened or the springs are old >>> or the line is too small of a diameter then line won't stay in. >>> >>> As long a the above three conditions are met then the problem you are >>> having is with the friction on the drum. It sounds like those three >>> conditions are met since you only experienced this problem in heavy winds. >>> As mentioned extra wraps should help add friction. Additionally a machine >>> shop can re-knurl the drum. You can also add a sleeve to the jib sheet. >>> If you have the crew to do so, try having them not use the self-tailer to >>> winch in on the tacks. See how much pressure the tailer needs to apply >>> before the winch slips. The tailer should only have to apply moderate >>> tension. If they are really pulling you need another wrap (or 2). If you >>> have 4 or 5 wraps and the winch still slips then you need more friction. >>> Sleeving the sheet is probably a little cheaper and will make the line >>> better on the hand. You can also do it yourself. If you still find that >>> it takes 4 or more wraps I would start looking for a machine shop. I have >>> one in mind if you are interested. >>> >> We had 4 wraps on the drum so I am thinking friction on the drum. I don’t >> know what re-knurling means and don’t know if any shop would know how to do >> this. Also, I have not found a good machine shop in my area. What shop did >> you have in mind? What would you sleeve the sheet with? Dave >> >>> Josh Muckley >>> S/V Sea Hawk >>> 1989 C&C 37+ >>> Solomons, MD >>> >>> _______________________________________________ >> >> Aries >> 1990 C&C 34+ >> New London, CT >> >> <pastedGraphic.tiff> >> >> >> _______________________________________________ >> >> Email address: >> CnC-List@cnc-list.com >> To change your list preferences, including unsubscribing -- go to the bottom >> of page at: >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >
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