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Post by peter99 on Dec 18, 2019 12:18:27 GMT
Have had my RF-25 for some 15 years now and has given good service with the milling and drilling of parts for my Y4 5” loco (still somewhat belated to do finalised).
Since new I removed the tri-levers as I found them not necessary for my use.
The other day I replaced the tri-levers but to my surprise on unscrewing the levers knob to use it would not move the quill. It was solid.
I cannot move the quill with the tri-levers.
What has happened? Before I reluctantly do a strip down. Has any member experienced this problem? Is there something I have overlooked?
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Post by John Baguley on Dec 18, 2019 21:36:59 GMT
Hello Peter,
My Chester Eagle 25 mill is virtually identical. The drive between the Tri lever boss and the quill drive is like a cone clutch that the large knob clamps together. It's probable that with it not being released for such a long time the two coned surfaces have seized together. You won't be able to turn the tri levers if that is the case. You could try gently tapping the boss for the levers and see if that will free it off.
John
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Post by 92220 on Dec 22, 2019 9:14:17 GMT
Hi Peter.
I don't know if you have sorted your problem but as I have just seen your thread, I thought a description of mine might help. I don't know your machine but if the quill set-up is anything like my quill head, the tri lever and the worm drive are on the same shaft, and both are engaged with cone clutches. If my worm drive is tightened ready to drive the quill down, the tri-lever won't turn because it cannot turn the worm drive from the wheel shaft. I have to make sure the worm clutch is running free before the tri-lever will operate.
Bob.
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Post by peter99 on Dec 22, 2019 17:58:32 GMT
Hi baggy & 92220. Many thanks for your responses! It looks as if it’s got to be a strip down. I have tried tapping the tri-lever casting and thereabouts with the leather hammer but to no avail. Browsing the internet I have come across an exploded drawing of parts and separately a cross sectional drawing all supposedly of a Wong Fu round column mill drill. On releasing the knob on the tri-lever the the sleeve due to the internal spring and the sleeve appearing to have a gear cut on the end moves to engages with the hand lever cross shaft spline. It feels as if it is jammed and does not engage. On tightening the knob on the tri-lever it pulls the sleeve against the spring out of engagement. I will keep you advised!
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Post by peter99 on Dec 28, 2019 19:18:17 GMT
Hi baggo. I had a strip down today and you were quite right the Mill Drill Tri-lever shaft does have a cone clutch! It was not apparent or obvious from the internet drawings. A squirt of WD40 and a tap from the hammer and the clutch separated then a re-grease and now all is working fine! Many thanks! Just got to wind the clock spring now!  / |
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Post by 92220 on Dec 30, 2019 8:56:47 GMT
Hi Peter.
Pleased to see you got it sorted. I use both feeds regularly so never have a problem with sticking clutches. I also fully release the tri-lever clutch, whenever I use the worm feed.
Bob
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