Thread: Supported linear rail question.
-
30-01-2010 #11But the look of it, is not the setup that I will use. I will for my X axis, only have one rail pr. side and not two.
So if the initial design required 2 blocks per rail then to get the same strength when mounted on the side you will need 3 blocks per rail.
-
30-01-2010 #12
Ok, I see then. However, I think I have overcome the problem, by mounting an heavy angle iron on the side, and mounting the rails on top of these.
-
30-01-2010 #13Ok, I see then. However, I think I have overcome the problem, by mounting an heavy angle iron on the side, and mounting the rails on top of these.
-
30-01-2010 #14
my machine is 4'x8' so it's going to be quite big.
the angle iron will be run at the machines full length if used that way.
mainly cutting wood materials, Nylon sheets, plexi and so on. Not cutting metals.
-
05-02-2010 #15
-
05-02-2010 #16
The supported round rail is designed so the load is directly on top.
I have seen it used in different orientations, but it is not designed for that.
As an example the TBR16 has a max dynamic load of just under 40 KG, but if you mount it on its side this will go right down and would definitely fail with sustained load of 40KG.Visit Us: www.automationshop.co.uk
-
05-02-2010 #17
Am I missing the point here, but that is per bearing? As most x and y axis will have 4, and even with a 70% reduction, thats still 112kg. Add another bearing per side and that goes up to 168kg. thats quite alot no?
-
05-02-2010 #18
The load planes are in the same direction wether you mount the rail laying down or tip it on its end are they not ?
.Me
-
05-02-2010 #19The load planes are in the same direction wether you mount the rail laying down or tip it on its end are they not ?
If the rail is mounted vertical then it is not technicaly subject to gravitational forces(because the bearing moves in this direction) so it only has to deal with cutting forces. X and y have to take the weight of the machine as well so loads are not the same in all planes.
As the bearings are open on one side then this area has reduced capacity by about 50% (so depending on the mounting orientation this will be different for each axis/plane) which is why I believe that they should be mounted back to back to even it out.
-
05-02-2010 #20
The rail is designed as a supported type, but you put it on its side and it is not supported as well anymore and you could bend the rail if the weight is too high.
Visit Us: www.automationshop.co.uk
Thread Information
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
Similar Threads
-
WANTED: Supported rail. The bigger the better
By r0bsk1 in forum Items WantedReplies: 0Last Post: 08-07-2013, 07:50 PM -
FOR SALE: ballscrews, supported linear rails, linear bearings, complete kit. for sale
By cutter in forum Items For SaleReplies: 0Last Post: 04-12-2011, 03:23 PM -
Some thoughts on using supported rail
By Ross77 in forum Rails, Guideways & BearingsReplies: 0Last Post: 29-01-2010, 07:13 PM -
16mm supported rail how many linear bearings
By progomez in forum Rails, Guideways & BearingsReplies: 13Last Post: 15-01-2009, 09:39 PM -
Supported rail or other?
By lateAtNight in forum Rails, Guideways & BearingsReplies: 16Last Post: 14-11-2008, 02:28 PM
Bookmarks