Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing
Posted by
Harvey White
on 2003-04-19 17:43:03 UTC
On Sat, 19 Apr 2003 05:32:41 -0000, you wrote:
that there's no drag.
in a socket wrench set. You can have two interlocking pieces that are
coupled by a rubber spider. The spider flexes, and allows the shafts
to be misaligned a bit.
oil, or water hardened. You heat it up red hot, then dunk it in
whatever medium it's made for. Then you heat it again to temper it,
but only to about 400 degrees...
Some of it is ground, or precision ground. Generally a better grade
of steel, and since it is not cold rolled, has less internal stresses.
can push the bearing assembly apart. Thrust bearings are made to take
a push towards them, so they won't pop the bearings out.
Look at a bearing like a wimpy's sandwich... two washers are the buns,
and the inner meat patty is a ring of captive ball bearings. thrust
tries to squish the bearings into the thrust washer, not push them
out.
that kind of bearing has poor resistance to play along the radius of
the rod... You can combine it with both kinds of ball bearing, or you
can get a conical bearing (they use them for car axles....) that have
cone shaped races, and rollers for the bearings...
It will take thrust in one direction axially, and all directions
radially.
Sorry that I can't help more.
Harvey
>>How does one attach a leadscrew/threaded rod to a thrust bearing?Works if the inner race of the bearing is bigger than the outer, or
>>Does one just make sure that the diameters are a tight fit, or are
>>there screws to tighten or something?
>
>"Probably not screws, but you might use a collar, which then forms
>the surface pushing against the thrust bearing."
>
>Ahh! How about this simple method. I get a threaded rod ====== ,
>screw in a bolt () at one end, insert the screw into a (any) bearing
>% sitting in machine housing, screw in another bolt (), with some
>screw thread left over for the coupling to the shaft. Then the 2
>bolts will hold the bearing firmly in between them.
that there's no drag.
>No. Flexible couplings can look mechanically like the universal joint
>========()%()===
>
>How does that sound for a quickie no fuss solution for a beginning?
>
>"Many people use a flexible coupling of some sort, since it makes the
>stepper alignment a little less critical."
>
>Flexible coupling like the tubing for domestic cooking gas?
in a socket wrench set. You can have two interlocking pieces that are
coupled by a rubber spider. The spider flexes, and allows the shafts
to be misaligned a bit.
>"I'm not sure of the real question."Right, it's a variety of steel that's easy to temper. It can be air,
>"drill rod is a good quality steel, not particularaly straight ....."
>
>I sort of guess that drill rod is toolsteel for making drill bits?
>But what I was getting at is I think drill rod is American Lingo.
oil, or water hardened. You heat it up red hot, then dunk it in
whatever medium it's made for. Then you heat it again to temper it,
but only to about 400 degrees...
Some of it is ground, or precision ground. Generally a better grade
of steel, and since it is not cold rolled, has less internal stresses.
>Don't know what they call it here, and don't think they have itSilver steel.
>anyway because most people don't know what a drill rod is.
>
>"Regarding thrust bearings, you can make a block with a bearing forIf there's a sufficient load on the bearing, through the bearing, you
>the axial load, and attach plates then add thrust bearings. Thrust
>bearings are often very very inexpensive so if you have the ability
>to use them, do so."
>
>How about the scheme I described above as a subsitute. Haven't used
>thrust bearing before.
can push the bearing assembly apart. Thrust bearings are made to take
a push towards them, so they won't pop the bearings out.
Look at a bearing like a wimpy's sandwich... two washers are the buns,
and the inner meat patty is a ring of captive ball bearings. thrust
tries to squish the bearings into the thrust washer, not push them
out.
that kind of bearing has poor resistance to play along the radius of
the rod... You can combine it with both kinds of ball bearing, or you
can get a conical bearing (they use them for car axles....) that have
cone shaped races, and rollers for the bearings...
It will take thrust in one direction axially, and all directions
radially.
>Since I'm on the other side of the pond, I can't say what's available.
>"mcmaster-carr can be very helpful here and still be done cheap...I
>just added new trust washers to my Y and they cost 5 bucks for the
>12mm size...two needed"
>
>When will McMaster-Carr go international - like Farnell or something?
>Hopefully before I retire as as cadcamoholic.
Sorry that I can't help more.
Harvey
>
>Andrew
>
Discussion Thread
andrewyslee
2003-04-17 20:09:48 UTC
no thrust bearing
Robert Campbell
2003-04-18 04:55:42 UTC
Re: [CAD_CAM_EDM_DRO] no thrust bearing
andrewyslee
2003-04-18 12:20:41 UTC
Re: no thrust bearing
David Paulson
2003-04-18 13:00:03 UTC
Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing
Robert Campbell
2003-04-18 15:59:37 UTC
Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing
sparkness2001
2003-04-18 16:00:45 UTC
Re: no thrust bearing
Hoyt McKagen
2003-04-18 17:21:21 UTC
Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing
turbulatordude
2003-04-18 18:14:34 UTC
Re: no thrust bearing - simple design ?
mueller914
2003-04-18 20:16:36 UTC
Re: no thrust bearing - simple design ?
Harvey White
2003-04-18 21:36:58 UTC
Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing
andrewyslee
2003-04-18 22:32:45 UTC
Re: no thrust bearing
Jon Elson
2003-04-18 23:48:10 UTC
Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing
JanRwl@A...
2003-04-19 09:49:08 UTC
Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing - simple design ?
Harvey White
2003-04-19 17:43:03 UTC
Re: [CAD_CAM_EDM_DRO] Re: no thrust bearing
Elliot Burke
2003-04-20 10:17:55 UTC
RE:Re: Re: no thrust bearing - simple design ?
Hoyt McKagen
2003-04-21 06:47:51 UTC
Re: [CAD_CAM_EDM_DRO] RE:Re: Re: no thrust bearing - simple design ?
sparkness2001
2003-04-21 14:54:47 UTC
RE:Re: Re: no thrust bearing - simple design ?
Elliot Burke
2003-04-22 22:21:01 UTC
re:Re: RE:Re: Re: no thrust bearing - simple design ?
Hoyt McKagen
2003-04-23 07:10:11 UTC
Re: [CAD_CAM_EDM_DRO] re:Re: RE:Re: Re: no thrust bearing - simple design ?
Elliot Burke
2003-04-24 09:08:37 UTC
re:Re: re:Re: RE:Re: Re: no thrust bearing - simple design ?