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Sturmey-Archer SW Drei-Gang-Naben: Unterschied zwischen den Versionen

→‎Polieren: weiter...
(→‎Polieren: weiter...)
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====Polieren====
====Polieren====
Weil die meisten inneren Bauteile von Sturmey-Archer Naben nach der Hitzebehandlung nicht nachbearbeitet oder geschliffen wurden, ist ihre Oberflächenbeschaffenheit eher rau und sie profitieren deutlich durch Polieren. Das erreicht man normalerweise einfach durch Benutzen der Nabe und alle Bauteile schleifen sich über die Zeit ein zu einer geschmeidigen Funktion. Bei der SW besteht allerdings das Problem, dass Verschleißpartikel zirkulieren und auf die Sperrklinken einwirken. Polieren der Sperrklinkenbuchsen, der Ranpen der Lagerringe, Getreibeflächen, Mitnehmer, usw. kann nur Verbesserung bringen; poliere mit einem Dremel-Werkzeug oder ähnlichem so viele Stellen wie möglich. Bei glatten Flächen kann trockenes/nasses 600er Schmirgelpapier auf einem flachen Glaskörper zusammen mit leichtem Öl eine sehr glatte Oberfläche erzeugen.


Because most of the Sturmey-Archer internal parts are not machined or ground after heat treatment, their surface finish is rather rough, and they can benefit a good deal from polishing. Normally, this would be accomplished by simply using the hub, and all the parts would wear in over time to a smooth working condition. The problem with this in the SW is that the wear particles are in circulation, and may have detrimental effects on the pawls. Polishing of the pawl sockets, ball ring ramps, gear faces, driver, etc. can only help; polish with a Dremel tool or something similar as many of these areas as you can stand. For flat surfaces, a pane of flat glass with 600-grit wet/dry sandpaper and light oil can be used to produce a very smooth surface.


As the planet gears are shaper-cut gears with poor tooth precision, lapping of new gears is not a bad idea, either. This can be accomplished by assembling the gearing, introducing a bit of automotive valve-grinding paste in the mesh and spending a patient hour turning the assembly back and forth by hand. Don't use too much paste; you don't want to grind more than the surface of the gears. When finished, remove all traces of the grinding paste. Perhaps the best advice concerning polishing is to disassemble the hub and change the oil after a run-in period of, say, 50 miles or so. Wear areas that can benefit from additional polishing will then be evident. It may be good to disassemble and change the oil every year, or until little oil discoloration is encountered.
As the planet gears are shaper-cut gears with poor tooth precision, lapping of new gears is not a bad idea, either. This can be accomplished by assembling the gearing, introducing a bit of automotive valve-grinding paste in the mesh and spending a patient hour turning the assembly back and forth by hand. Don't use too much paste; you don't want to grind more than the surface of the gears. When finished, remove all traces of the grinding paste. Perhaps the best advice concerning polishing is to disassemble the hub and change the oil after a run-in period of, say, 50 miles or so. Wear areas that can benefit from additional polishing will then be evident. It may be good to disassemble and change the oil every year, or until little oil discoloration is encountered.
====Die Sperrklinkenversenkungen neu formen====
====Die Sperrklinkenversenkungen neu formen====


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