3x6

[natchez]

does any know how long a rail you can use on a cnc without supporting it please let me know

[ToyMaker]

How big and what kind of rail? 1 inch drill rod is going to need less support than 1 inch gas pipe.
What kind of load? a foam cutter will need less support than a mill for steel.
A little more information in the question might yield some answers.

robotic regards,

Tom
= = = = =
Middle age is when work is a lot less fun - and fun a lot more work.
- - Bob Hope

[natchez]

1 inch solid steel rod i am going to use a router or maybe something smaller

[ToyMaker]

OK. Let me see if I can stick my neck out here and not step too heavily on it
Given:
1. This is the woodworking forum so you're building a wood router.
2. The thread subject is 3x6 so you are going for a 3 feet by 6 feet footprint (cutting area somewhat less).
3. Your router is about 1 horsepower, 110Vac.
4. You can live with 0.030 (~1/32 inch) accuracy.
5. You plan on solid end supports for your rails.
6. You have a very rigid base to build on.
Answers:
A. Your 3 foot span (Y axis) will probably be ok with just end supports.
B. Your 6 foot span (X axis) will need at least one center support.

robotic regards,

Tom
= = = = =
Some people complain because God puts thorns on roses, while others praise God for putting roses among the thorns.
- - anonymous

[natchez]

i am using thompson pillow blocks the closed type so should i just built 3x3 instead of 3x6

[bean7795]

You could go with the open pillow blocks and buy one of there shaft supports and keep the 3x6 idea

[natchez]

i cant seem to find to open pillow blocks at a decent price as soon as they hit ebay there gone