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dfwallis 
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Joined: 09 Mar 2023
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 Topic: CA Rockshaft Diameter and Clearance
Posted: 16 Mar 2023 at 8:41pm |
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Does someone know the diameter of the rockshaft bar and how much clearance there is between it and the footboard or anything else within the region from the bearings inward 3 or 4 inches? Is there 0.5 to 1 inch of clearance or greater? Can I clamp a typical split bearing block on it (block itself fixed and non-rotating with base/attachment towards the rear).
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tomwmn
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Joined: 24 Jun 2011
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Posted: 17 Mar 2023 at 2:26pm |
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Hi
Rocker shaft O D is 1.75 inches. Clearance between shaft and floor pan depends on how straight yours is. On mine, one side is less than 3/8 inch. Other side almost rubbing.
Good luck!
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dfwallis
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Posted: 17 Mar 2023 at 2:46pm |
 tomwmn wrote:
Hi
Rocker shaft O D is 1.75 inches. Clearance between shaft and floor pan depends on how straight yours is. On mine, one side is less than 3/8 inch. Other side almost rubbing.
Good luck! |
hmmm, that clearance is disappointing but agrees with my very old memory. Not much room for me to wrap a split bearing around it without mods.
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dfwallis
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Posted: 17 Mar 2023 at 3:41pm |
dfwallis wrote:
tomwmn wrote:
Hi
Rocker shaft O D is 1.75 inches. Clearance between shaft and floor pan depends on how straight yours is. On mine, one side is less than 3/8 inch. Other side almost rubbing.
Good luck! |
hmmm, that clearance is disappointing but agrees with my very old memory. Not much room for me to wrap a split bearing around it without mods. |
I suppose a free spinning metal loop might work. Won't really impede the hydraulic actuation much. I can make it a little thin but wider for strength if needed.
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 17 Mar 2023 at 3:59pm |
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cut a notch in the floor plate 2 inches wide and 1/2 inch deep... then plenty or room for a strap... or weld on.
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Like them all, but love the "B"s.
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dfwallis
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Posted: 17 Mar 2023 at 4:56pm |
steve(ill) wrote:
cut a notch in the floor plate 2 inches wide and 1/2 inch deep... then plenty or room for a strap... or weld on. |
If I did that though, I might be able to make enough room for a split bearing, which would be nicer engineering wise. Was hoping not to have to cut the floor pan though.
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tomwmn
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Posted: 17 Mar 2023 at 5:33pm |
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Find a piece of tubing with correct ID, and not too thick. Cut in half. Then modify as needed. Tubing comes in many sizes and strengths!!!
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dfwallis
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Posted: 17 Mar 2023 at 6:46pm |
tomwmn wrote:
Find a piece of tubing with correct ID, and not too thick. Cut in half. Then modify as needed. Tubing comes in many sizes and strengths!!! |
Yes, I've done that for similar uses. A bronze sleeve bearing might work also, if I decide it's sufficiently wear resistant. But I'll still have to make some sort of custom pillow block.
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steve(ill)
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Posted: 17 Mar 2023 at 7:11pm |
Gary... your going to find out that Steel on Steel is OK in this application.. It only move 20- 30 degrees on the shaft and / seldom moves/ very slow... Wipe grease on it before assembly and that will be good for 10 years. ...... I have that on a tractor.
you can make it as complicated as you want.. or this simple.
Edited by steve(ill) - 17 Mar 2023 at 7:15pm
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Like them all, but love the "B"s.
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dfwallis
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Posted: 17 Mar 2023 at 7:23pm |
steve(ill) wrote:
Gary... your going to find out that Steel on Steel is OK in this application.. It only move 20- 30 degrees on the shaft and / seldom moves/ very slow... Wipe grease on it before assembly and that will be good for 10 years. ...... I have that on a tractor.
you can make it as complicated as you want.. or this simple.
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Yup, i've seen those brackets. Probably good enough. I can make a bracket for the bracket :)
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dfwallis
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Posted: 17 Mar 2023 at 7:24pm |
dfwallis wrote:
steve(ill) wrote:
Gary... your going to find out that Steel on Steel is OK in this application.. It only move 20- 30 degrees on the shaft and / seldom moves/ very slow... Wipe grease on it before assembly and that will be good for 10 years. ...... I have that on a tractor.
you can make it as complicated as you want.. or this simple.
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Yup, i've seen those brackets. Probably good enough. I can make a bracket for the bracket :) |
I am/was an actual engineer before I retired, I like make it 'better' :)
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steve(ill)
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Posted: 17 Mar 2023 at 7:28pm |
yea... i did that for 40 years in a prior life also...... Enjoy "modifying" and making something out of something else . 
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Like them all, but love the "B"s.
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Dakota Dave
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Posted: 17 Mar 2023 at 7:38pm |
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My rock shaft just has 2 tabs welded to it with a hole through them for the top link pin the shaft rotates less than 45 deg the welded tabs dont slide around like the U clamp does. It makes for a much better top link.
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dfwallis
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Posted: 17 Mar 2023 at 8:12pm |
Dakota Dave wrote:
My rock shaft just has 2 tabs welded to it with a hole through them for the top link pin the shaft rotates less than 45 deg the welded tabs dont slide around like the U clamp does. It makes for a much better top link. |
I prefer to leave the tractor as original as possible besides tire size and maybe an engine tweak (and LED bulbs). Don't really want to weld anything to it, hoping for simple bolt on additions. I'm sure I can devise a clamp improvement to prevent rotation of the bracket if it turns out to be a problem. Anyway, dad has mostly drawbar implements, I just want it to be a bit more flexible. I've never encountered snap coupler implements. If I ever need to, I'll make it triple compatible :)
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