|
Post by simplyloco on Dec 10, 2021 9:46:22 GMT
Any clever ideas about squaring off the ends of the slots? Good that you should broach the subject! I have some very good quality needle files and I have a fair idea of how to use them...
|
|
|
Post by ettingtonliam on Dec 10, 2021 13:07:30 GMT
When I had to do multiple cottered joints for Locomotion, I ground up a tool from 1/4" dia HSS, and used that to square the ends. It was fitted in a collet in the mill, and just worked up and down with quill. Otherwise, as you say, its needle files.
|
|
|
Post by simplyloco on Dec 10, 2021 16:40:07 GMT
Like you, if had I a lot to do I would have done similar. However, these only took 30 minutes each to file out, and it would have taken much longer than that to make the tool and do the job! The key to success was in making a key... This is as far as I got today before the dreaded hand cramps set in. They are getting more frequent these days, so I must drink more beer! I've polished one 75% to see how they look, and I'm quite pleased so far! They all line up OK, so it's looking good!
|
|
|
Post by simplyloco on Dec 13, 2021 16:11:10 GMT
Guess who has lost three of the rectangular bearing shells...?Following the excitement of the F1 race I got a couple of hours in on the drop link bearings. I had made the basic shells, but they needed to be machined to slide inside the drop links. I've assembled two just to prove the method: take no notice of the gaps, there's a packing pillar to go in and the gib keys put it all together - hopefully... I can't find three of the bearing shells. Never mind, I've got this far and it is looking the part!
|
|
|
Post by fubar123 on Dec 13, 2021 18:59:57 GMT
Now you know you have put them safe !........... somewhere !
|
|
|
Post by simplyloco on Dec 16, 2021 13:56:58 GMT
Drop Links Tryout Successful!Well, I made some new bearing shells, but I needed to make one of the four spacing pillars to check the distance between the two bearings when the gib and cotter were tightened up. I needn't have worried, as no-one was more surprised than me when the keys settled in the right places! As per drawing. The pillars were pressed into the rectangular steel spacers. All will be polished before final assembly... On the machine. Onwards and Upwards!
|
|
|
Post by ettingtonliam on Dec 16, 2021 15:26:28 GMT
Will you be drilling a hole in the cotter to take a little leather thong that was often used to stop the cotter falling out?
|
|
|
Post by simplyloco on Dec 16, 2021 17:43:30 GMT
Will you be drilling a hole in the cotter to take a little leather thong that was often used to stop the cotter falling out? That's a very good idea! I've always had a thing about thongs...
|
|
|
Post by fubar123 on Dec 16, 2021 18:40:17 GMT
Me too !
|
|
|
Post by chris vine on Dec 16, 2021 20:40:41 GMT
when the bushes wear (full size, not your model!), and need to be filed to move inwards onto the shaft, how did the columns adjust to keep it all snug?
Chris.
|
|
|
Post by simplyloco on Dec 16, 2021 20:54:43 GMT
when the bushes wear (full size, not your model!), and need to be filed to move inwards onto the shaft, how did the columns adjust to keep it all snug? Chris. Hi Chris. I admit to knowing very little, but I imagine that the two halves would have been initially and deliberately 'gapped' to allow for wear to be taken up by whacking the cotters in a bit!, They would all have to be similarly adjusted to maintain centre xistances?
|
|
|
Post by chris vine on Dec 16, 2021 21:50:54 GMT
I hadn't looked carefully enough!
I see now that the adjustment is taken up from the other end with the wedged cotter.
Must engage brain before engaging mouth/typing!!
Chris.
|
|
|
Post by simplyloco on Dec 20, 2021 20:36:03 GMT
Two down, two to go!
|
|
|
Post by simplyloco on Dec 21, 2021 13:29:22 GMT
|
|
|
Post by simplyloco on Dec 25, 2021 11:08:31 GMT
Just a taster. Finish it next week!
|
|
|
Post by simplyloco on Dec 27, 2021 15:31:53 GMT
Parallel Motion Completed! (Needs some polish, but what a way to spend a Public Holiday!) I also need some thinner nuts... I was going to fit it, but I just found another legacy issue: the cylinder is 1/4" too tall therefore the link fouls the gland! Grr...
|
|
|
Post by simplyloco on Dec 28, 2021 16:12:07 GMT
|
|
|
Post by Jim on Dec 29, 2021 3:07:51 GMT
That's great news John. The video clip of the engine is poetry in motion, fascinating watching the sedate operation I must say.
Well done John you've created a first class model.
Jim
|
|
|
Post by simplyloco on Dec 30, 2021 18:17:58 GMT
Stuart Major Beam Oil/Water PumpI finished the pump today: connecting rod, flanges and copper transfer pipe. Did you know that you can hold square bar in a ER20 collet? I didn't until today! Absolute magic!
|
|
|
Post by fubar123 on Dec 30, 2021 18:30:19 GMT
Thanks for the tip of holding square in an ER collet, Beam Engine looks super
|
|