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Search: Posts Made By: Mr Ron
Forum: Rails & Rollers Sat 30 June 2012, 11:22
Replies: 40
Views: 47,983
Posted By Mr Ron
I can see the advantage of plastic wheels,...

I can see the advantage of plastic wheels, especially when used with aluminum rails. The plastic used doesn't have to have low friction properties. Very low friction might cause the plastic to slide...
Forum: Rails & Rollers Sat 30 June 2012, 10:45
Replies: 92
Views: 119,245
Posted By Mr Ron
I am in the process of building my own CNC...

I am in the process of building my own CNC machine (not a MM) and I'm trying to incorporate lessons learned by others into my final design. After reading all the replies to this post, I find one flaw...
Forum: Rails & Rollers Sat 30 June 2012, 09:56
Replies: 19
Views: 24,103
Posted By Mr Ron
I think you are quite correct in your...

I think you are quite correct in your observation. A vertical load on the bearing assembly, will create a compressive axial force at the top of the bearing and a tension axial force at the bottom of...
Forum: Rails & Rollers Fri 29 June 2012, 07:40
Replies: 19
Views: 24,103
Posted By Mr Ron
No. Someone else posted a similar message over in...

No. Someone else posted a similar message over in a different forum that I wasn't aware of. My sketch is not unique.
Forum: Rails & Rollers Thu 28 June 2012, 14:11
Replies: 19
Views: 24,103
Posted By Mr Ron
Here is a sketch to illustrate what I mean.

Here is a sketch to illustrate what I mean.
Forum: Rails & Rollers Thu 28 June 2012, 12:59
Replies: 19
Views: 24,103
Posted By Mr Ron
Turn a ring with about a .125" wall thickness...

Turn a ring with about a .125" wall thickness (thicker is OK).The ID of the ring will be a press fit with the bearing OD. One face of the ring will be beveled 45°. Two bearings with a spacer between...
Forum: Rails & Rollers Tue 26 June 2012, 17:43
Replies: 4
Views: 11,675
Posted By Mr Ron
Rail Grinding Jig for a Radial Arm Saw

Attached is a sketch for a rail grinding jig to be used with a radial arm saw. The jig is fastened to the saw table; a grinding disk attached to the saw motor; motor carriage rotated 90° and bevel...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sun 24 June 2012, 15:38
Replies: 2
Views: 8,426
Posted By Mr Ron
Using a chain for a rack

Using a chain is a common means of moving a trolley along a rail. The chain is tack welded to an overhead I-beam and a sprocket that is inside the trolley engages the chain. As the sprocket is...
Forum: Introduce yourself and start planning Thu 21 June 2012, 14:55
Replies: 2
Views: 4,265
Posted By Mr Ron
I'm a new member to this forum

I'm retired from the shipbuilding field and have a lot of free time on my hands. I stumbled unto CNC routering and am hot to get started. I have designed my own CNC machine based on the good points...
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