tag:blogger.com,1999:blog-1592992209402300549.post1440692233592500585..comments2024-03-28T08:06:43.198-04:00Comments on The Silicon Graybeard: Shop Time - A Little Trick on the LatheSiGraybeardhttp://www.blogger.com/profile/00280583031339062059noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-1592992209402300549.post-58918673713022761982015-10-23T05:34:36.135-04:002015-10-23T05:34:36.135-04:00Ritchie, if there's anything I don't like ...Ritchie, if there's anything I don't like about this setup, that's it. The holder doesn't hold the cutoff blade securely and the whole QCTP wants to rotate. I was thinking it's just defective but I don't know. <br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-6533693482565475372015-10-22T22:14:33.790-04:002015-10-22T22:14:33.790-04:00I see you have the quick change toolpost-I just go...I see you have the quick change toolpost-I just got one and like it a lot, except for doing cut off. These always seem to be a problem. This is when I replace the original steel toolpost. With the q/c, I can watch the entire toolpost flex when it's getting ready to grab. I get the impression that a lot of hobby workers turn a guide groove and finish the cut with an Armstrong cutter (hacksaw).Ritchienoreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-59246487436480571102015-10-01T22:00:10.651-04:002015-10-01T22:00:10.651-04:00
Hi Graybeard
Try roll form taps..( they use a la...<br />Hi Graybeard<br /><br />Try roll form taps..( they use a larger diameter root drill) and are stronger<br />as well as not creating any chips. It does take a little more torque though.<br /><br />http://balax.com/<br /><br />and Alumtap for aluminum<br /><br />http://www.amazon.com/Ounce-AlumTap-Cutting-Winbro-Each/dp/B002R84X6U<br /><br />fwiw<br />Irishhttps://www.blogger.com/profile/09772405362867585844noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-55002278657403952592015-09-28T07:01:26.619-04:002015-09-28T07:01:26.619-04:00I machine mine from delirn block, or layered acryl...I machine mine from delirn block, or layered acrylic blocks. <br /><br />Comeandmakeitadminhttps://www.blogger.com/profile/17605162122677823581noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-43791373154953934312015-09-27T15:39:31.572-04:002015-09-27T15:39:31.572-04:00I've used all those, too, in addition to other...I've used all those, too, in addition to others when tapping steel.<br /><br />I pretty much stick to TapMagic these days as I bought a gallon of it sometime ago, and have plenty left!drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-14390904256165380002015-09-27T13:27:36.266-04:002015-09-27T13:27:36.266-04:00Dr.Jim - I was using Tap Magic. Just one drop bef...Dr.Jim - I was using Tap Magic. Just one drop before the first plunge cut. I think enough stays in there to do the entire tapping. <br /><br />WD40 works well on aluminum, as does paraffin. <br /><br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-6673863840563854212015-09-26T22:57:47.913-04:002015-09-26T22:57:47.913-04:00Were you doing those dry?
If not, what lube were ...Were you doing those dry?<br /><br />If not, what lube were you using?drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-36340418366161500292015-09-26T22:41:47.186-04:002015-09-26T22:41:47.186-04:00"The next pieces are about 1" long with ..."The next pieces are about 1" long with 10-32 threaded from both ends. If I remember correctly."<br /><br />A quick trip down to the machine shop/secret laboratory/wine cellar (smells great right now as three five gallon pails of red juice are in the final phase of the primary ferment) shows that a 10-32 tap will most likely not thread all the way through the 1" piece. So, is it time for a redesign? might be a lot easier to use a longer fastener and to drill the pieces for 10-32 body size and then use a self locking nut or nut/lockwasher/washer?<br /><br />This week's shop project was to take the cross slide and the apron apart to clean and tighten gibbs. I removed some grease and dirt that had not seen the light of day since mainland China.<br /> John in Phillyhttps://www.blogger.com/profile/16196033252818387245noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-1870487916952666122015-09-26T21:33:40.505-04:002015-09-26T21:33:40.505-04:00"... do you need to have that much length of ..."<i>... do you need to have that much length of thread engagement?</i>"<br />Probably not. The drawings call out 3/4" deep threads and 3/4" cap screws but another piece of metal is going on the end of that spacer, and I'll bet 1/4 to 3/8" gets engaged. <br /><br />The next pieces are about 1" long with 10-32 threaded from both ends. If I remember correctly. <br /><br />Also, good to know it's useful to someone else. The last time I tried this, I did four standoffs, that's 8 holes tapped, and took the entire afternoon. This time four standoffs didn't take an hour - including setting up to take the videos! <br /><br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-3663247467053044792015-09-26T21:00:17.201-04:002015-09-26T21:00:17.201-04:00Wow. I am going to put this one into the permanent...Wow. I am going to put this one into the permanent part of my brain because sooner or later this is going to save me a lot of work. (although sometimes I think the permanent part of my brain is eroding faster then a sandcastle at high tide)<br /><br />I also looked up some other thoughts on power tapping.<br /><br />http://bbs.homeshopmachinist.net/threads/33790-Power-tapping-holes-how-is-it-done<br /><br />And I took a glance at thread forming taps. <br /><br />http://www.practicalmachinist.com/vb/general-archive/how-thread-forming-tap-used-86164/<br /><br />And the only thought that wrinkled my brow, do you need to have that much length of thread engagement? <br /><br />Thank you for posting the video.<br /><br />John in Phillyhttps://www.blogger.com/profile/16196033252818387245noreply@blogger.com