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  1. #16
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    101

    Default

    Thanks Bob!

    I have been blowing out all of the oil ways as I have gone and have all the nipples in a placky bag waiting to be cleaned up.

    Is that spindle a genuine Hercus accessory or one that you made? How did the machine go as a surface grinder? I have been wondering as I have assembled it if I could set it up to do small things...

    Regards

    Ian

  2. #17
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    65
    Posts
    5,828

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    The spindle extension is the real deal Ian.

    The surface grinding was a fleeting experience. It works but the downfeed is not real sensitive. The incorporation of a dial indicator to more accurately gauge the feed might help. I look forward to more experimentation with the No.1 as a surface grinder.

    I have purged grease from oil nipples by holding them in a vice and pumping oil through them with a pom pom oiler. It also establishes how effectively they work.

    Bob.

  3. #18
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    101

    Default

    Thanks Bob, that is an impressive machine, if I could get that much capacity it would be all I ever needed.

    The upper table had quite a lot of surface rust so I had my first go at electrolysis, seems to have worked very well.

    IMG_0295.jpg

    While this was cooking I checked the under table with a dial indicator. That Mitutoyo is the best DI that I have and that is the most rigid mounting that I could contrive. With this setup I couldn't measure any variation along the X or across the Y. The table lifts a little, around half a thou when the rack is engaged to move the X but settles again when stationary. I imagine that the shape of the pinion teeth cause this. I will check it again with the heavy upper table in place.

    IMG_0301.jpg

    I then had a proper look at the accessories. This lot just seems to be standard Hercus, just dirty!

    IMG_0296.jpg


    There were however a couple of things that surprised me. At the front is most (missing the upper clamp) of a Reliance drill sharpening jig, it is described by Harold Hall here; http://www.homews.co.uk/page354.html I will be interested to have a play with this later. Behind the jig are two micrometer heads, not sure if they are part of the Hercus setup?


    IMG_0297.jpg

    Regards

    Ian


    IMG_0301.jpgIMG_0296.jpgIMG_0297.jpgIMG_0295.jpg

  4. #19
    Join Date
    Nov 2008
    Location
    Perth WA
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    65
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    Default

    I am interested in those stops Ian, something similar was the subject of this thread - http://www.woodworkforums.com/showth...70#post1846970

    Do you reckon there is any chance of a few close up photos if you get an opportunity?

    Bob.

  5. #20
    Join Date
    Aug 2011
    Location
    Melbourne
    Posts
    3,441

    Default

    Hi Ian,

    It's starting to look good. Once you finish cleaning and putting it back together, I will bring a huge amount of joy to use. The movement of the DI could be from dragging or side stress when moving the table from a less than rigid setup. You could try a DTI with the stylus set at nearly parallel to the table. I find it usually creates less drag stresses on the mounting setup.

    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.

  6. #21
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    101

    Default

    Hi Simon - The DTI is a good idea, I will give it a try.

    Bob. The earlier post about stops is very interesting. I think that they are painted black so not Hercus. I will clean them up and do some photos. They are in a terrible state. I have been thinking about how to approach them, I might start by dropping them in some solvent and then a soft brush.

    Regards

    Ian

  7. #22
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    65
    Posts
    2,949

    Default

    Quote Originally Posted by Anorak Bob View Post
    Thanks for the advice Ian.

    The oiler is the one you need. You will need to check the nipples to ensure that they aren't clogged with grease along with any oil ways.

    The photo above is of the spindle extension after a clean up and one small modification, the result of a scare. I had a 6" wheel mounted on the extension while playing around with a bit of surface grinding. The motor is VFD controlled and when I hit stop on the VFD, its braking was abrupt enough to cause the extension to unwind. Fortunately no damage occurred. I drilled two holes 180 degrees apart on the extension's rear flange to enable the use of a C spanner to tighten it.

    Bob.

    PS On the topic of surface grinding, here's some photos of a simple mechanism to traverse the table. Might provide some inspiration for both of us. - http://www.woodworkforums.com/showth...51#post1344851
    That's not a workshop, it's tooo clean, must be a museum
    Kryn

  8. #23
    Join Date
    Nov 2008
    Location
    Perth WA
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    65
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    Quote Originally Posted by KBs PensNmore View Post
    That's not a workshop, it's tooo clean, must be a museum
    Kryn
    Not a museum Kryn, Switzerland !

  9. #24
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    101

    Default

    Hi Bob

    I had a go at those stops today and an interesting exercise it has been. Firstly they don't belong to the machine, they are made to fit a 0.34+ slot (probably actually 3/8) and the slot on the front of the table is 0.3.

    IMG_0305.jpg

    Here I have cleaned both and assembled one. They are very strong and made to be bumped. The spindle thread is 5/16 20tpi, that is 50 thou per revolution. This gives about 1/2" of useful travel, perhaps the spindle has been kept short to minimize the risk of it bending? The spindle lock (a curved recess in a shaft at 90 deg to the spindle axis) is very strong and should protect the spindle. They have had plenty of use and the one that is disassembled has been tapped along a track with a hammer. I had to recut the head of the screw that fits into the the head of the spindle to allow me to get it apart.

    IMG_0308.jpg

    One of them had a t bolt, it is a bare 1/2" square, that is only 1/16" of grip on either side of a 3/8" slot. I wonder if it is designed to slip under severe load?

    At this point I knocked off thinking well if I mill them to fit a 0.3 slot I can use them on the Hercus and also my Centec mill which has 0.3 slots on the X,Y and X axies.


    IMG_0307.jpg

    All this time I was wondering what they came off. When I came in the penny dropped. When I bought the machine the guy had one of these 'Pocket Size' surface grinders for sale, this from the 1960 Macpherson catalogue. It was in a similar state to the Hercus and had apparently come from the same source. I thought about buying both but as the tax office had just performed a walletectomy stopped at one.

    IMG_0309.jpg

    In the catalogue you can just about make out the micrometer heads and they are referred to in the text as 'Stop dogs'.

    These things really should go back to the surface grinder from which they came. If whoever purchased the machine contacts me via a PM they can have them.

    Regards

    Ian


    IMG_0305.jpgIMG_0308.jpgIMG_0307.jpgIMG_0309.jpg

  10. #25
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    65
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    Thank you Ian.

    I know two blokes on the forum with those little Macson grinders. I had a look at photos I have of a local one owned by Tom W , but his appears to be stopless. Christian Groves' was in bits when I visited him in Melbourne. I imagine they would both be interested in seeing your photos.

    With the Centec you'd be a fellow member of the shoebox machining club!!

    Bob.

  11. #26
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    101

    Default

    Cheers Bob, I have found the shoebox machining club a very comfortable place to be! It has been easier to send the very occasional big job out than than to have a lot of underutilized, heavy and space consuming capacity around.

    Regards

    Ian

  12. #27
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    101

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    Bob - A couple of stops visible here

    http://www.gumtree.com.au/s-ad/maced...der/1066542788

    Looks like they have used them to lock the X.

    Regards

    Ian

  13. #28
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    65
    Posts
    5,828

    Default Table Lock

    Hi Ian,

    The grinder I have had a knurled thumb wheel fitted to the underside of the table feed hand wheel boss casting which served to lock the table. The boss had been drilled and tapped and the threaded section of the thumb wheel ( actually a cap screw with a knurled wheel attached ) was brass tipped. I don't know if Peter Fou made this modification or if it was based on a factory lock. I have subsequently turned up a one piece affair, with the wheel slightly larger than its predecessor and it works well. If your No.1 is devoid of this feature I can post a couple of snapshots.

    Bob.

  14. #29
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    101

    Default

    Hi Bob

    Mine has a 'T' handle to lock the table feed hand wheel but no brass tip, unfortunately. However even with the shaft locked there is still a whisker of movement in the table, I will measure it later. There must be a small gap between the pinion teeth and the rack teeth which I can feel.

    I reassembled the spindle yesterday and the information the you sent me really saved my bacon. I hadn't paid enough attention to the correct orientation for all of those springs when I took it apart! Thanks.

    I put the collets and all of the rusty small parts from the accessories into vinegar overnight. Not as some here said in order to make pickles but rather to remove the rust. This has worked really well. I gave them a rough scour this morning before putting them back for the full 24 hours. After this they scoured off really easily. Once cleaned a surface of flash rust quickly formed which I have here converted with some phosphoric acid. I will clean the surface again in the morning and then oil them for storage or reassembly.

    Regards

    Ian



    IMG_0310[1].jpg

  15. #30
    Join Date
    Jun 2012
    Location
    ex Perth, now Mittagong
    Posts
    63

    Default

    Bob, the table lock was my creation, I had no idea what the original looked like so I made a quick & dirty fudge. Being virtually out of sight I went for function not beauty.

    Peter

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