What kind of ceiling clearance and structure do you have over the Mazak? Would it be possible to rig up a hoist in place to lift the spindle?
-- Ralph On Jun 27, 2022 9:00 AM, dave engvall <[email protected]> wrote: CAUTION: This email originated from outside the Walla Walla University email system. Hi Todd and others; Indeed it is a horrible idea but I feel backed to the wall. I have T lugs but they are secured by M6 shcs which is no where close to as strong as the normal retention stud. However, I plan to use the machine at full rpm with AlCrN coated end mill, coolant and keep the loading low. I don't have much to lose. My chances of living more than 10 years more are not good and that assume health good enough to work in the shop. Dave On 6/27/22 7:25 AM, Todd Zuercher wrote: > Gluing a spindle taper into a spindle sounds like a truly horribly idea. > (I'd be more worried about it letting go when you didn't want it to, than > trying to get it out later if you did want to remove it, although that also > may prove problematic.) > > The drive lugs are usually removable/replaceable. Maybe you could make new > drive lugs that also positively engage the tool holder to retain it. > Something like a longer T shape that would capture the tool holder flange. > (Personally I'd do every thing I could to fix the spindle properly though.) > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > -----Original Message----- > From: dave engvall <[email protected]> > Sent: Monday, June 27, 2022 9:57 AM > To: [email protected] > Subject: Re: [Emc-users] spindle problem > > [EXTERNAL EMAIL] Be sure links are safe. > > Update: The drive lugs get in the way of a safety disk or ring or anything > else. Epoxy looks more promising; just a semi-permanent solution. > Note: Epoxy can always be removed with heat or chlorinated solvents but... > Dave > > On 6/27/22 6:27 AM, dave engvall wrote: >> Back again; >> Since crawling in under the spindle is difficult for an old stiff guy >> I laid the iphone on the table and took a pic, rotated the spindle 45 >> degrees and took another; nothing useful moved. However, there are >> large socket head cap screws around the perimeter of the spindle. It >> should be possible to make a safety cap that has a few thou clearance >> to limit axial movement. 'Maybe' I can jury rig something. Basically I >> have to see what kind of clearances I have. An actual thrust bearing >> seems like asking for trouble. >> Psychologically it would almost be easier to pick up the radiator cap >> and run a new(er) one in. Still that brings all sorts of problems of >> its own. Hard to win. >> Back to the drawing table. ;-) >> Dave >> >> On 6/26/22 9:10 AM, andy pugh wrote: >>> On Sun, 26 Jun 2022 at 15:45, dave engvall <[email protected]> wrote: >>> >>>> A couple of solutions present themselves but neither are ideal. >>>> Simply use the M6 shcs that hold the dogs in place to secure the CAT40. >>>> Balance and adequate strength/safety would seem to present problems. >>> Does the nose have any extra holes? There are 4 threaded holes with >>> no obvious function on my 30INT spindle and looking around the >>> internet I see threaded holes in some of the CAT40 spindles. >>> It seems that you could use those to hold in a custom ER40 (or >>> similar) adaptor. >>> >>> 4000 rpm probably isn't fast enough to need to worry too much about >>> balance. >>> >>> >> >> >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fnam04.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Flist&data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C94a9d69d8d4d4724258d08da58562f6e%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637919424448312013%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=tKVqHOZINKjGG7P0kGeNS85ilw%2BTqb4xmecNKJ5EiWQ%3D&reserved=0 >> s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Cto >> ddz%40pgrahamdunn.com%7Cd876656d34af455849e308da58450956%7C5758544c573 >> f47cebee96c3e0806fb43%7C0%7C0%7C637919350789204421%7CUnknown%7CTWFpbGZ >> sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3 >> D%7C3000%7C%7C%7C&sdata=3sMlH8RJi3F6SLfmQUSLComdi4ljNjUd3xja1Zz%2F >> X6I%3D&reserved=0 > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C94a9d69d8d4d4724258d08da58562f6e%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637919424448312013%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Zg%2BVglEy1H69c1sl8kQaPbPUBmjU8%2BtgwLLSPraMrhs%3D&reserved=0 > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C94a9d69d8d4d4724258d08da58562f6e%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637919424448312013%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Zg%2BVglEy1H69c1sl8kQaPbPUBmjU8%2BtgwLLSPraMrhs%3D&reserved=0 _______________________________________________ Emc-users mailing list [email protected] https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C94a9d69d8d4d4724258d08da58562f6e%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637919424448312013%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Zg%2BVglEy1H69c1sl8kQaPbPUBmjU8%2BtgwLLSPraMrhs%3D&reserved=0 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
