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I am buying some guide rods for my router table today and need to
know if they can be Mild steel or do they have to be hard chromed? I
will be useing the VXB linear bearings on a 5/8" rod and I have the
mild steel rods redily available so I want to use them instead of the
hard chromed rod but I just dont know how this will affect the
outcome of the quality and usability.
Thanks for your input

Jason

Hi Jason
I think if you went to DIY-CNC forum you would have your question
better answered there...That's just the right place.
In this forum everyone has their hands full with Mach2 development.
Not many are thinking about guide rods right now....



-- In mach1mach2cnc@..., "jasonjet25" <jasonjet25@e...>
wrote:

I am buying some guide rods for my router table today and need to
know if they can be Mild steel or do they have to be hard chromed?

I

will be useing the VXB linear bearings on a 5/8" rod and I have the
mild steel rods redily available so I want to use them instead of

the

hard chromed rod but I just dont know how this will affect the
outcome of the quality and usability.
Thanks for your input

Jason

Jason:

If the weight is not too heavy I woudln't think it would matter. The
important thing is you have mild steel available to you, in this game the
rule tends to be "If it works..great..". I have only used polished steel
myself, but have never seen any damage from it on a 200lb gantry..

Art
www.artofcnc.ca

Jason,

They need to be hardened... Chrome or not is up to you<G>

Even a solft mild steel with a chrome finish (plating) will not work.

The rods will dent and deform almost from the first go, and any
vibration will make "dents" which will cause the bewrings to stutter
and fault.

A long time ago I picked up what I thought were hardened AND chromed
rods, from a surplus place. They were from printers. I bought a bunch
of expensive linear bearings like the ones you've selected...

That's how I know this stuff I'm typing<G>

Generally Thomson rails set the "standard" witht heir "case 60" shaft
line.

But others like Hiwin and INA may be cheaper. Sorry for the bad news,
bur if you're gonna use tose bearings, bute the bullet and buy some
hardened shafting...

One other possibility--that I DON'T have direct experience with
(yet<G>)-- is hydraulic cylinder shafting. It meets most of the
hardness and straightness needs, and I've been told it's less
expensive than case60 style shaft. BUT... It's only available in one
inch and larger diameters.

Hope this helps,

Ballendo

P.S. I even thought I'd go ahead and allow the grooves to develop in
the chromed, soft shaft; thinking that it would "settle" once the
wear indents area balanced/matched the load... Succintly put, that
was a bad idea<G>


--- In mach1mach2cnc@..., "jasonjet25" <jasonjet25@e...>
wrote:

I am buying some guide rods for my router table today and need to
know if they can be Mild steel or do they have to be hard chromed? I
will be useing the VXB linear bearings on a 5/8" rod and I have the
mild steel rods redily available so I want to use them instead of

the

hard chromed rod but I just dont know how this will affect the
outcome of the quality and usability.
Thanks for your input

Jason

Jason,
I am using hydraulic cylinder rod shafting (brother in law works for
a cylinder mfg :)price was right!), however I don't have enough hours
on the machine to determine any type of wear rate, but it sure runs
smooth.

Greg

--- In mach1mach2cnc@...,Art <fenerty@a...> wrote:

Jason:

If the weight is not too heavy I woudln't think it would matter.

The

important thing is you have mild steel available to you, in this

game the

rule tends to be "If it works..great..". I have only used polished

steel

myself, but have never seen any damage from it on a 200lb gantry..

Art
www.artofcnc.ca

----- Original Message -----
From: "jasonjet25" <jasonjet25@e...>
To: <mach1mach2cnc@...>
Sent: Thursday, August 05, 2004 7:48 PM
Subject: [mach1mach2cnc] Guide Rods

I am buying some guide rods for my router table today and need to
know if they can be Mild steel or do they have to be hard

chromed? I

will be useing the VXB linear bearings on a 5/8" rod and I have

the

mild steel rods redily available so I want to use them instead of

the

hard chromed rod but I just dont know how this will affect the

One problem that I have found is the tolorance from different manufactures of guide bearings. Soe are made to fit with the tolerance under size on the bearing and some with the tol. over on the shaft. Nook ceramic bearings will not work nice on Pacific ceramic shafting. And Art, My 6 month project of a 12 foot x12 foot beam [gantry] saw is nearing completion. Will be sending another $$$ soon. Arthur P.