On 1/4/2016 3:46 AM, andy pugh wrote: > On 4 January 2016 at 06:16, Gregg Eshelman <[email protected]> wrote: >> LeBlond quoted me $1500 and at least three weeks before they could think >> about making a new gear. (Probably would have to locate a retired >> machinist to come in to do the job!) > > > I would do it for half that :-)
Bet you would. :) I wouldn't be surprised to discover that part of the lead time would be for LeBlond to drag an old shaper out of storage and fix it up to do the job. Can't be a lot of call for a feed reverse gear for a 73 year old 13" lathe. > Hobs are not that expensive: > http://www.ebay.co.uk/itm/271961374714 But small enough to cut one gear next to a larger gear only about 1" away? And of course being 14 pitch the hob would not at all be a stock item. I spent $2000 on my CNC mill so I can claim to have saved $1,000 ;P and it's useful for other jobs. > In your position I would have (depending on the relative hub > diameters) turned off the existing teeth and pressed on a ring gear or > pressed the existing partner gear onto the hub of a new smaller gear. No such thing as 14 pitch stock gears. Or 1.75 mod, or 2.5 mod 10 mm face width. A friend of mine is fixing a Takang TK380. Cost him around $200 to have the 1.75 mod feed drive output gear cut. First time the machinist insisted there was no such thing as 1.75 module and cut it 2 mod. 1.75 mod is darn close to 14 pitch and like 14 pitch has been declared "obsolete", sometime in the 1970's or early 1980's. For the 2.5 mod 10 mm thick gear, I found one at KHK the day before new year's eve and bookmarked it. I showed to my friend that evening and he said buy it. So new year's day I went to the page and GONE! All 10 mm thick 2.5 mod gears GONE! Can't get them, unobtanium from any stock gear company. Only available are 25 mm thick, 30 mm for higher tooth counts - or 6 mm thick "thin face" - or 18 mm Delrin. At least I can still get a thicker gear and spend a bunch of time and effort to throw away money cutting it thinner, then cutting the damaged gear off the spool, boring, pressing, drilling and tapping for set screws to pin it. One of the larger spool gears in it is factory done like that. WTH is with the gear industry that it periodically points its collective finger at something and banishes it from being made? > I have actually made a few sets of repair gears for the apron of the > Rivett 608 for a few people. Rivett made their gear pairs in > pressed-together pairs originally. > https://picasaweb.google.com/108164504656404380542/Rivett#6223123844882670610 How much for a 2.5 mod, 10 mm thick with a 35 mm inside diameter? --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
