Toolguy Posted January 11, 2015 Share Posted January 11, 2015 +1! Thanks Peter. This is getting to be a good group of CNC guys! Many have added valuable content and some new guys are getting a good start. I think threads like this are a good use of the Enosverse. Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 11, 2015 Share Posted January 11, 2015 SO I have had NO LUCK finding info on the RPM to run these things at anywhere. Anyone got any ideas?? http://www.shars.com/products/view/4814/14quot12quot114quot_90_Degree_Countersink_Set Link to comment Share on other sites More sharing options...
CJDOUBLETAP Posted January 12, 2015 Share Posted January 12, 2015 I would try starting out with 2000rpm, 6ipm feed, taking fairly light cuts and adjust from there. From the pic in the add I think you will have the best luck with the smaller dia. cutter. Looks more ridged than the 2 larger cutters with the smaller dia. shank (in proportion to the cutting dia.)... Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 12, 2015 Share Posted January 12, 2015 Ok thanks!! Link to comment Share on other sites More sharing options...
Toolguy Posted January 12, 2015 Share Posted January 12, 2015 SO I have had NO LUCK finding info on the RPM to run these things at anywhere. Anyone got any ideas?? Check out post #1656. Link to comment Share on other sites More sharing options...
blind bat Posted January 12, 2015 Share Posted January 12, 2015 Jared and OG - Thanks so much for posting the videos. You guys should start a kickstarter campaign to make a series of gunsmithing videos geared towards CNC minmills. Or at least post an amazon wish list or paypal address for donations. I've learned a ton from this thread and I don't even own a mill. I'd gladly kick in some cash to keep this thread going. Link to comment Share on other sites More sharing options...
PeterSteele Posted January 12, 2015 Share Posted January 12, 2015 Got my two new lowers today ... just have to finish up the model of what I actually want, then generate the toolpaths. Link to comment Share on other sites More sharing options...
bmiller Posted January 12, 2015 Share Posted January 12, 2015 Got my two new lowers today ... just have to finish up the model of what I actually want, then generate the toolpaths. All you have to do is remove everything that is not a lower:). Good luck, can't wait to see the results. Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 13, 2015 Share Posted January 13, 2015 (edited) I would run around 2000 - 2400 RPM for the middle one, faster for the small one and slower for the largest one. Try something, evaluate, adjust, try again. Thanks ToolGuy!!!!!!!!!!! Have to take very lite cuts with this but better than the 90degree chamber end mill so far. I think 3000 is best for the 1/4" one and feed slow around 8ipm Edited January 13, 2015 by dskinsler83 Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 13, 2015 Share Posted January 13, 2015 (edited) Holy crap this was not easy. Matching the sides was very hard when flipping the slide around. Any tips for this??? I racked my brain till midnight and then hoped for the best. Edited January 13, 2015 by dskinsler83 Link to comment Share on other sites More sharing options...
BrianATL Posted January 13, 2015 Share Posted January 13, 2015 Just map what you did on side 1 and repeat on side 2. You should indicate your starting point on both sides from same "starting point" on the slide (eg. Muzzle) Link to comment Share on other sites More sharing options...
blind bat Posted January 13, 2015 Share Posted January 13, 2015 What tools do you guys currently have in your tool holders for common gunsmithing tasks? Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 14, 2015 Share Posted January 14, 2015 I tried that and it didn't work like i planned it to lol. there has to be a better way...Also is the G0759 worth the money? I am really wanting to upgrade but want it to be the last buy? I don't have a ton of money (don't even have the money for the G0759 right now) but I want a touch more travel but the RPMs listed are less than what I have with my Harbor Freight right now with its belt drive conversion. Link to comment Share on other sites More sharing options...
StraightUp_OG Posted January 15, 2015 Author Share Posted January 15, 2015 New toys have arrived! What quality! I am very impressed with these holders. I got some er20's and some set screw holders to try both. Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 15, 2015 Share Posted January 15, 2015 What do you use the chamfer tool for? Link to comment Share on other sites More sharing options...
StraightUp_OG Posted January 15, 2015 Author Share Posted January 15, 2015 (edited) Mag wells on the 1911 Edited January 15, 2015 by StraightUp_OG Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 15, 2015 Share Posted January 15, 2015 Got ya! Link to comment Share on other sites More sharing options...
dskinsler83 Posted January 16, 2015 Share Posted January 16, 2015 Starting on a G24 for this season for me to show case I hope lol or be laughed at at the matches. Oh well it is fun http://www.brianenos.com/forums/index.php?showtopic=208529 Link to comment Share on other sites More sharing options...
kevinj308 Posted January 16, 2015 Share Posted January 16, 2015 I tried that and it didn't work like i planned it to lol. there has to be a better way...Also is the G0759 worth the money? I am really wanting to upgrade but want it to be the last buy? I don't have a ton of money (don't even have the money for the G0759 right now) but I want a touch more travel but the RPMs listed are less than what I have with my Harbor Freight right now with its belt drive conversion. Getting more RPM out of a g0759/0704/bf20 is kind of a pita. There's a few options. You should change out the spindle bearings for all of them. The stock bearings are tapered rollers and probably wouldn't hang with 4000 plus rpm. So you gotta start with some angular contact bearings and some shims to get lower bearing in the right place in the housing. The upper one has an adjustment nut to set the preload. Still interested? You can replace the gears in the head to change the ratio and get some more speed, but it's still a gear train and a little noisy. This gets you 4700rpm he says, I haven't tried it http://g0704.com/Projects.html You can make a belt a drive conversion, or buy one. I found this online but haven't seen any reports of it on any forums. Makes me a little suspect but I really have no idea. http://www.benchtopprecision.com/bf20_belt_drive_kit.html Making one is the other option. Make brackets for the motor, buy the pulleys and belts, keep the quill or not?, kind of a pita there too. Hoss at g0704.com sells belt drive plans, You can buy just those plans or they come with his cnc conversion plans.I own his cnc plans and the belt drive part is pretty basic. But he has done all the research for you, part numbers and all. If you spend enough time on CNCzone.com or some of the other forums there's plenty of info to figure it out I think. The cnc plans are definitley worth it though if you'd ever go that route. I've done the bearing swap in the spindle on mine, wasn't that bad. Had to make spanner wrenches for the retaining nuts. I'll send a picture of the wrenches to anyone that's interested. Mine were VERY basic. Planning on doing a belt drive conversion sometime in 2015. Hope this helps anyone thinking of getting one these. Link to comment Share on other sites More sharing options...
StraightUp_OG Posted January 16, 2015 Author Share Posted January 16, 2015 (edited) Jared and OG - Thanks so much for posting the videos. You guys should start a kickstarter campaign to make a series of gunsmithing videos geared towards CNC minmills. Or at least post an amazon wish list or paypal address for donations. I've learned a ton from this thread and I don't even own a mill. I'd gladly kick in some cash to keep this thread going. Thanks man! It really is fun and I intend to continue participating in this thread. It has grown so much and I too, have learned a ton of fantastic stuff. Jared is really taking it to the next level and his contributions to the thread as well as the sport from an equipment perspective is MASSIVE and he is sure to create a few more game changers before he is done. I am just gathering the parts for my next open build and his comp is going on it! I am also looking forward to PeterSteele's ar lower outcome and his contribution to the thread. I am close to attempting another lower once I figure out F360 so his process and tool choices will be of great interest. @Kevin - Good info! Edited January 16, 2015 by StraightUp_OG Link to comment Share on other sites More sharing options...
kevinj308 Posted January 17, 2015 Share Posted January 17, 2015 Sherline has their rotary tables on sale this month, 20% off!!! https://www.sherlinedirect.com/index.cfm?fuseaction=category.display&category_id=16&CFID=56057212&CFTOKEN=17317346 They have a pretty good reputation for quality, and the size seems right for a hobby mill. Many years ago I had one of their little lathes. The quality was exceptional. I ordered this one: https://www.sherlinedirect.com/index.cfm?fuseaction=product.display&Product_ID=127&CFID=56057212&CFTOKEN=17317346 I had always planned on a 4th axis so I already had the driver and a Nema 23 motor ready to go, they were pretty inexpensive to add in during the build. Here's a 3 part series on cool 4th stuff: Link to comment Share on other sites More sharing options...
newmexicocrawler Posted January 18, 2015 Share Posted January 18, 2015 I have made several parts for my rock crawler on my buddies lathe and mill but haven't tried anything for anything else Link to comment Share on other sites More sharing options...
StraightUp_OG Posted January 18, 2015 Author Share Posted January 18, 2015 (edited) Just found out fusion 360 has a 1 year free subscription for hobbyists and startups! http://fusion360.autodesk.com/resources/akn/view/NINVFUS/ENU/?guid=GUID-D1193A1F-FBC3-4CEE-8957-B3CA15B1649B click the installation and subscription information link. Download the trial and then follow the above directions. Edited January 18, 2015 by StraightUp_OG Link to comment Share on other sites More sharing options...
bmiller Posted January 18, 2015 Share Posted January 18, 2015 How do you like it so far? Link to comment Share on other sites More sharing options...
StraightUp_OG Posted January 18, 2015 Author Share Posted January 18, 2015 (edited) Just really starting to get the interface. I have been slammed at work the last few weeks and have not had much time but I can tell it will do all I could want and more. I hope to make some chips with some output it this weekend. Edited January 18, 2015 by StraightUp_OG Link to comment Share on other sites More sharing options...
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