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  1. #226
    Join Date
    Aug 2015
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    Melbourne, Australia
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    Thanks shed. As a poster said in an early post on this thread. Grinder spindles are not complicated, just fussy. The real shame is there is no way to know if you've done it all right until you grind stuff.

    Maybe it might not be like new, but (hopefully) it'll be better than when it died and hit the bins in the weather.

    ... hopefully...

  2. #227
    Join Date
    Aug 2010
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    Near Bendigo, Victoria, AUS
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    67
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    Greg, boy I'm envious of your patience to get the finishes you have achieved!
    I must make a date to come and visit again and see the old girl in person....
    Cheers, Joe
    again completely retired - more time to contemplate projects and spend more shed time....

  3. #228
    Join Date
    Aug 2015
    Location
    Melbourne, Australia
    Posts
    419

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    G'day Joe,

    Re patience. Someone once said that working on old machines teaches you that. Personally, I reckon I must be nuts.

    And re the finish - don't be fooled! I have a fine-cut file by the lathe and a roll of emery. The finishes on the bearing boxes above wasn't too bad to begin with but a file and emery smoothed them so I could blue them against the head to check the taper.

    Btw, the green belt you gave me looks like it is not quite long enough. I'm not sure why as it came off another BS2, but the manual has some different lengths for 50/60hz and different table speeds so it could be something with that.

    Re checking the old girl out - anytime mate - lemme know and I'll make sure there are some cold beers about.

  4. #229
    Join Date
    Aug 2011
    Location
    Melbourne
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    3,872

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    That's some amazing work there. You must be pretty happy with the results.

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  5. #230
    Join Date
    Aug 2015
    Location
    Melbourne, Australia
    Posts
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    Thanks Simon, though the trouble is, it ain't actually a result until it's in and working like a grinder should. I sure am happy though to have got this far on those items without my usual severe stuff ups. They really have taken quite an effort. It makes me wonder how long they would have taken to make at the factory originally.

  6. #231
    Join Date
    Aug 2011
    Location
    Melbourne
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    3,872

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    Quote Originally Posted by StrayAlien View Post
    Thanks Simon, though the trouble is, it ain't actually a result until it's in and working like a grinder should. I sure am happy though to have got this far on those items without my usual severe stuff ups. They really have taken quite an effort. It makes me wonder how long they would have taken to make at the factory originally.
    Small steps, one after another and next thing you know you will have a beautiful grinder sitting in front of you. You will also forever be chuffed with the effort you put in and the skill required to get it running. Possibly no-one else will ever really appreciate it but you will!

    Back in the day there was no cnc so I assume it was the job of one person to make those bearing carriers. They probably had the process and tooling down pat but it would still have taken a considerable amount of time.

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  7. #232
    Join Date
    Aug 2015
    Location
    Melbourne, Australia
    Posts
    419

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    Thanks Simon, these projects can be pretty tough. Lots of time and angst - but I do agree that the 'post enjoyment' is a special thing. I spent about a year on the 1941 South Bend and haven't regretted it at all. I get a great deal of enjoyment using it, but I sure do get lot of enjoyment just looking at the old girl. You know, beer in hand, wander in the workshop - gaze around. Lovely.

    Before/after pics here: https://www.practicalmachinist.com/v...ml#post2619153

    With this old girl I am more than a little concerned about, I guess, the 'fussiness' of such a precise thing. I know the spindle isn't perfect, I know the alignment is not perfect. I also now know that the tapered bores in the head are *not* in alignment with the threads and flat surfaces at each end of the head like you would expect. So the rear bearing is offset ever so slightly from the front - rear bearing clearance is a bit wonky to cater. Plus, rotating by hand I can feel a small tight spot. You know ... 'stuff'.

    But, I have no way to know if the bearings it left the factory with were made to cater for the same misalignment - or anything. Who knows. So ... my only choice is to try what I have and see if it sucks ... or not.

    To that end ..... time to get it in and see if it sucks .... or not ...

    So spindle in with lock rings etc.

    IMG_20190106_143912.jpgIMG_20190106_144741.jpg

    It'll not run without a belt. I got a 3 ply rubberised 'transmission belt' from beltech in VIC:

    IMG_20190105_170106.jpg

    Not knowing what the length should be I did a fit up and got a by-thumb length and then did the world's worse clip lacing effort. I am only game to show the good side - the other side is utterly woeful. But .... it is straight, and that is all I am interested in right now. And 'no', it came in no other colour ...


    IMG_20190111_192837.jpg

    Wound in:


    IMG_20190111_193812.jpg

    And with cheap-as-chips ebay VFD running at 10hz for 10mins and then 20hz for 20 mins ... it didn't explode. It barely got warm. I was hoping for next-to-zero runout - but a quick measurement showed maybe 0.02mm or so.

    IMG_20190111_195919.jpg

    I haven't quite figured out what the oil cup arrangement is as yet but just gave it liberal amounts of kero down the oil holes.

    And yes - the belt metal lace clips running over 6 pulleys every lap will drive me totally *BONKERS* but, that is something else to solve.

    I'll run it in slowly this weekend. I can't get a wheel on as yet as I need to male a L/H nut to keep the wheel hub on .. and I need to make a puller to get the wheel hub off as well. Those will be next.

    Greg.

    EDIT:

    1. petip: yes .. that is the next project sitting behind it - the Hercus saw - lovely thing it is. Apols, this project has taken a *little* longer than expected. )
    2. And 'no' after the spindle is sorted (if/when it gets sorted), this is not the end of the project. Table mechanisms not working as yet. Other stuff too .... darn!!!

  8. #233
    BobL is online now Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
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    4,518

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    Provided you don't need to remove the belt too often one way to get a much quieter belt join is to use a finger jointed connection and then hand sew the join using something like a mono filament.

    Here's one I did a few years ago using a 4 mm thick raw cowhide. This was for a 100 mm wide strop belt - the thread is dental floss, holes were drilled with a 1mm bit - The cut edges are all angled which is why the thread appears to be right on the edge of the join.
    Strop_Stitch.jpg

  9. #234
    Join Date
    Aug 2015
    Location
    Melbourne, Australia
    Posts
    419

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    Bob, that is a work of art!

    As it happens, studying the slow running machine closer, I think the 3 ply belt is too thick for the top 2" (spindle) pulley. Well, certainly with the metal clip on it. The belt counterweight at the rear visibility lifts as the join goes over the spindle pulley.

    Jhovel gave me the belt from his machine and I also have a belt that was lying in the grass near the machine and they're similar lengths but... a fair bit shorter than even the shortest belt length mentioned in the manual.

    However, I'll give Joe's a go I reckon. It is more flexible.ut it is endless which is a real pain to get on and off. A real pain.

    Re the join, if the belt test bears no fruit I'll be looking to lace the 3 ply somehow and see how that goes with no clip. Thanks for the example. Very nice.

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