Author Topic: Yet another Quorn  (Read 432 times)

Offline Charles Lamont

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Yet another Quorn
« on: March 17, 2024, 11:46:35 PM »
My Mk2 Quorn Tool & Cutter Grinder kit was bought in 2004. It has finally emerged from under the bench and work has started. It will be mainly a Mk2, with pad/split-cotter clamps rather than split castings, some ideas from the Mk3, and numerous, mainly minor, tweaks of my own.

This job will proceed at my usual snail's pace, and I am not doing a full build log, but intend to post occasionally with more interesting set-ups, problems, wrinkles, ideas, questions.

The first alteration has been to move the column forward by 1/16" to suit the casting. The cored hole was really too big, and gave almost no latitude at all on the hole position, especially as there was a divot right at the top. I was lucky and the boring tool just managed to scrape all the primer off. Note on the far right of the first pic, a piece of blue plastic shim under the back of the angle plate to get it dead square to the spindle. Borrowing from the woodworking department, I was able to do a little preliminary blending of the chamfer into the cast surface.
« Last Edit: March 17, 2024, 11:51:34 PM by Charles Lamont »

Offline Admiral_dk

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Re: Yet another Quorn
« Reply #1 on: March 18, 2024, 06:38:00 AM »
Last Picture shows a new one for me - logical when you think about it - but I don't think I would have come up with this one by myself  :ThumbsUp:

Per     :cheers:

Offline Chipswitheverything

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Re: Yet another Quorn
« Reply #2 on: March 18, 2024, 09:38:58 AM »
Will be interested to see your posts about the Quorn build, and the ways in which you have gone about some of the set-ups for the more "interesting " operations that builders of this machine have the sometimes challenge of concocting. I must admit that, partly for the reasons I outlined when I wrote up my finally finished Quorn back in early 2023, my example has not done much since completion, but it was satisfying to have done the job. My various non-model engineer visitors to the house, seeing it proudly displayed on a table in the living room, have not sought to engage me in conversation about what it might be!  Dave

Offline Charles Lamont

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Re: Yet another Quorn
« Reply #3 on: May 12, 2024, 10:21:29 PM »
Boring the holes in the base castings for the bars.

The RH bed was fixed just by one bolt through its leg, so I clamped the back end to an angle plate for security. Straps are not practicable for this job as they are bound to distort the light Myford boring table which has to be free to move backwards and forewards between the two holes.

I went to the considerable expense of getting the longer, chrome-plated Mk3 bed bars from Hemingway. These turn out to be hydraulic cylinder rod, and they are within tolerance, barely, being evidently centreless ground and markedly lobed.

The front holes are bored very close to 1.000" - a good running fit on the bar, while the rear ones are 1.002" to allow 3 thou on diameter for Loctite.

As the assembly photo shows, I have nearly finished already.   
« Last Edit: May 12, 2024, 10:25:21 PM by Charles Lamont »

Offline Dave Otto

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Re: Yet another Quorn
« Reply #4 on: May 13, 2024, 12:01:47 AM »
Nice work!
If it is anything like the Universal Pillar Tool, once you get the basic machine done you are only about 1/2 finished :)

Dave

Offline Bruno Mueller

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Re: Yet another Quorn
« Reply #5 on: May 13, 2024, 04:27:26 PM »
I also used these hydraulic lift rods for my Bonelle. My rods were surface hardened and hard chrome-plated.
http://mueller-bruno.de/  http://www.bosch-combi.de/
Whoever talks shit about me behind my back is in the best position to lick my ass. 
Greetings from the southwest of Germany.

 

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