Re: [CAD_CAM_EDM_DRO] are 3/4 shafts good for axis ?

Hi Dave,
I used 20mm drill rod for mine, 400mm long, supported with one support in the middle, and "open" cheap chinese re-circulating ball type linear bearings. These bearings were so sloppy and such junk, I gutted them, replacing the bearings with home made Delrin "c" bushes in the existing carriages. It puts more load on the steppers, but it is strong as the proverbial brick sh**house. I machine wood and alu with no problems. Support in the middle is crucial in my opinion for anything over say 200mm (8").
Regards, Brian

--- On Thu, 19/4/12, turbulatordude <dave_mucha@...> wrote:

From: turbulatordude <dave_mucha@...>
Subject: [CAD_CAM_EDM_DRO] are 3/4 shafts good for axis ?
To: CAD_CAM_EDM_DRO@yahoogroups.com
Date: Thursday, 19 April, 2012, 16:45
















 









Hi all,



I am designing a wood router with a 18 inch wide X axis.

it looks like 3/4 inch shafts will fit the design really well, floating, connected to the ends, not fully supported along the length.



I plan on using a trim router and will do cutting in wood.



Anyone have experience with 3/4 inch shafting ? I am on the fence between 1 inch and 3/4 inch.



If I was planning on doing anything stronger, I would use linear shafting that would be fully supported along the length, but that would cost more than the rest of this machine !



Suggestions and feedback welcome.



Dave



























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