Re: [Emc-users] custom | stock bearing nut
On Tuesday, 5 April 2022 12:57:28 EDT Sam Sokolik wrote: > wow - I had a hard enough time finding 12mm x 1.. The local hardware > store actually had 'jam nuts' in that pitch. I can't say I have ever > run across .8 - are you sure? ;) > > sam > That was my first reaction too Sam. Not impossible, but to us in the imperial world thats equ to 31.75 tpi. I've got some 50 tpi in my lathe, tapered to boot as it was used as a compression nut, worked well but it was picky to do on TLM. What amazed me at the time was that the first pass at making the screw and 3 nuts worked the first time. No redo's to "get it right". > On Tue, Apr 5, 2022 at 11:47 AM dave engvall wrote: > > Hi all, > > I have a pair of ball screws: THK KX 71227 A > > These are new but older and as far as I can tell not on the THK site. > > They are threaded on one end to retain a bearing. That bearing would be the thrust bearing and is likely a dual angular contact, one faceing each way so a bit of preload can be applied to get rid of all backlash from that bearing. Which explains the fine thread. Have you those bearings that came with those screws, Dave or do you need to src those too? > > M15 x 0.8 or close. Does anyone know of a bearing nut that would fit > > or am I stuck with > > having a pair custom made? > > I've spent a fair amount of time searching the web but maybe > > (probably) someone else's google foo is better than mine. > > As always TIA > > > > Dave > > Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] custom | stock bearing nut
Or even easier, use a thread gauge! -Original Message- From: Roland Jollivet Sent: April 5, 2022 2:28 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] custom | stock bearing nut On Tue, 5 Apr 2022 at 18:47, dave engvall wrote: > Hi all, > I have a pair of ball screws: THK KX 71227 A These are new but older > and as far as I can tell not on the THK site. > They are threaded on one end to retain a bearing. > M15 x 0.8 or close. Does anyone know of a bearing nut that would fit > or am I stuck with having a pair custom made? > I've spent a fair amount of time searching the web but maybe > (probably) someone else's google foo is better than mine. > As always TIA > > Dave > 0.8mm pitch is very... fine for a diameter that large. Unlikely. It's possibly 1mm as that is the finest most large diameters go to. So the easiest way to check is to take a machine screw and lay it on the ballscrew to check engagement, with a standard; M8 x 1.25mm M6 x 1mm M5 x 0.8mm M4 x 0.7mm ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] custom | stock bearing nut
On Tue, 5 Apr 2022 at 18:47, dave engvall wrote: > Hi all, > I have a pair of ball screws: THK KX 71227 A > These are new but older and as far as I can tell not on the THK site. > They are threaded on one end to retain a bearing. > M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or > am I stuck with > having a pair custom made? > I've spent a fair amount of time searching the web but maybe (probably) > someone else's google foo is better than mine. > As always TIA > > Dave > 0.8mm pitch is very... fine for a diameter that large. Unlikely. It's possibly 1mm as that is the finest most large diameters go to. So the easiest way to check is to take a machine screw and lay it on the ballscrew to check engagement, with a standard; M8 x 1.25mm M6 x 1mm M5 x 0.8mm M4 x 0.7mm ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] custom | stock bearing nut
On Tue, Apr 5, 2022 at 11:47 AM dave engvall wrote: Hi all, I have a pair of ball screws: THK KX 71227 A These are new but older and as far as I can tell not on the THK site. They are threaded on one end to retain a bearing. M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or am I stuck with having a pair custom made? I've spent a fair amount of time searching the web but maybe (probably) someone else's google foo is better than mine. As always TIA Dave Check and see if it is .586-32TPI. That is the diameter and pitch for a N-02 nut which is for a shaft for a M15 shaft. People lucky enough to live in metric land would use an M14 or 15 bearing lock nut but they have pitch of 1mm or 1.5 mm. Ed. ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] custom | stock bearing nut
McMaster and Misumi have M15x1 bearing retaining nuts, but nothing finer pitch. Hard to say if your ball screw was supplied with the thread from THK or if it was supplied unfinished and machined later. I don't even see M15x0.8 in Machinery's Handbook. -- Ralph From: dave engvall [dengv...@charter.net] Sent: Tuesday, April 5, 2022 9:43 AM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] custom | stock bearing nut CAUTION: This email originated from outside the Walla Walla University email system. Hi all, I have a pair of ball screws: THK KX 71227 A These are new but older and as far as I can tell not on the THK site. They are threaded on one end to retain a bearing. M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or am I stuck with having a pair custom made? I've spent a fair amount of time searching the web but maybe (probably) someone else's google foo is better than mine. As always TIA Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C6b6f42f9e48a4881982108da17237da9%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637847738766025407%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pmnJCI5%2FgciapFiq6F753NCTCKCEGbE%2BNKEbz5mY%2Fhc%3D&reserved=0 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] custom | stock bearing nut
Measure the thread accurately and even without a lathe it should be easy enough to thread mill a nut. Are your certain about the 0.8mm pitch? A pitch of 0.75 or 1.0mm seems more likely? A M15x0.75 tap is available from https://www.threadtools.com/hss-taps/hss-taps-2-p-metric-9/p9 and I'm certain other vendors. -Original Message- From: Sam Sokolik Sent: April 5, 2022 12:57 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] custom | stock bearing nut wow - I had a hard enough time finding 12mm x 1.. The local hardware store actually had 'jam nuts' in that pitch. I can't say I have ever run across .8 - are you sure? ;) sam On Tue, Apr 5, 2022 at 11:47 AM dave engvall wrote: > Hi all, > I have a pair of ball screws: THK KX 71227 A These are new but older > and as far as I can tell not on the THK site. > They are threaded on one end to retain a bearing. > M15 x 0.8 or close. Does anyone know of a bearing nut that would fit > or am I stuck with having a pair custom made? > I've spent a fair amount of time searching the web but maybe > (probably) someone else's google foo is better than mine. > As always TIA > > Dave > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] custom | stock bearing nut
On Tue, 5 Apr 2022 at 17:47, dave engvall wrote: > M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or > am I stuck with > having a pair custom made? I assume that you don't have a CNC lathe then? What do you have? Could you thread-mill them? -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] custom | stock bearing nut
look at that - they actually make a tap.. https://www.ebay.com/itm/255422311969?hash=item3b785b2e21:g:hmoAAOSwI4VdVsri On Tue, Apr 5, 2022 at 11:57 AM Sam Sokolik wrote: > wow - I had a hard enough time finding 12mm x 1.. The local hardware > store actually had 'jam nuts' in that pitch. I can't say I have ever run > across .8 - are you sure? ;) > > sam > > > > On Tue, Apr 5, 2022 at 11:47 AM dave engvall wrote: > >> Hi all, >> I have a pair of ball screws: THK KX 71227 A >> These are new but older and as far as I can tell not on the THK site. >> They are threaded on one end to retain a bearing. >> M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or >> am I stuck with >> having a pair custom made? >> I've spent a fair amount of time searching the web but maybe (probably) >> someone else's google foo is better than mine. >> As always TIA >> >> Dave >> >> >> ___ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] custom | stock bearing nut
wow - I had a hard enough time finding 12mm x 1.. The local hardware store actually had 'jam nuts' in that pitch. I can't say I have ever run across .8 - are you sure? ;) sam On Tue, Apr 5, 2022 at 11:47 AM dave engvall wrote: > Hi all, > I have a pair of ball screws: THK KX 71227 A > These are new but older and as far as I can tell not on the THK site. > They are threaded on one end to retain a bearing. > M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or > am I stuck with > having a pair custom made? > I've spent a fair amount of time searching the web but maybe (probably) > someone else's google foo is better than mine. > As always TIA > > Dave > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] custom | stock bearing nut
Hi all, I have a pair of ball screws: THK KX 71227 A These are new but older and as far as I can tell not on the THK site. They are threaded on one end to retain a bearing. M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or am I stuck with having a pair custom made? I've spent a fair amount of time searching the web but maybe (probably) someone else's google foo is better than mine. As always TIA Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
