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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Torsten wrote:
"Johnsorj" wrote in message ... Hi All I recently purchased an Enco 7X12 Horizontal/Vertical bandsaw at an industrial auction. It seemed to run OK under no load but the blade would stall as soon I I tried to saw anything heavy ( with a cogging sound coming from the gearbox). I pulled the gearbox cover and discovered that the steel worm gear has completely cut off the top of the brass driven gear--It is difficult to tell but it looks as though the 2 gears barely meshed even when new ( as though the spacing between gears is too far apart for these non-adjustable gears) Has anyone else encountered this on one of these 7X12 saws or even the very common 4X6 smaller saw ? (The design of the 7X12 saw appears to be identical to the common 4X6 with just scaled up components) My concern is that any replacement gear from Enco will be undersized and will only partially mesh--leading to another mulched driven gear in 6 months---Major Bummer !!! Any ideas ??? The bad driven gear is rouhly 2" in diameter and has 20 teeth---Perhaps a larger gear with 2-3 more teeth ( and hence larger diameter for a more complete mesh) might be a better solution ??? Finding such a gear might prove difficult ?? All comments are greatly appreciated Ray Johnson St.Paul, Mn Maybe get a new gear and make a eccentric bushing to bring the gears into a better anglinement. Good Luck This link: http://24.237.160.4/files/astronomy/...unt/Drives.PDF shows how to cut a matching high-precision worm and worm-wheel. The precision is way overkill for your application, but the basic principles would still apply. |
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