Harold Hall's precision grinding table

Discussion in 'Tools' started by xo18thfa, Mar 4, 2011.

Help Support HMEM by donating:

  1. Dec 9, 2019 #61

    Steen Kruse

    Steen Kruse

    Steen Kruse

    New Member HMEM Supporter

    Joined:
    Jan 2, 2019
    Messages:
    3
    Likes Received:
    1
    Gender:
    Male
    Location:
    Denmark
    I know it is an old thread. But I would like to make one of these.
    If I buy the book is the plans in there.
     
  2. Dec 9, 2019 #62

    goldstar31

    goldstar31

    goldstar31

    Well-Known Member

    Joined:
    Feb 20, 2010
    Messages:
    2,374
    Likes Received:
    525
    Gender:
    Male
    Occupation:
    Haggis Breeder
    Location:
    Twixt Tyne and Tees
    Yes but the drawings seem to part of the 'words and music' rather than a sheets of working drawings.
    Again, mine are drawn in Imperial sizes which could be a problem for mainland Europeans.

    Now the more versatile Quorn has been made easier with the introduction of the Mark3 from Heningwayskits.
    The kit IS expensive, however.

    Maybe, the Tinker which originated from England but the drawings now come from Guy Lautard in Canada may whet your appetite . I've just had a look and the newer drawings and the 3 castings can be easily fabricated or welded. Again, it is worth a look at.

    Another T&C is the Stent which is a nice machine. I have a fabricated version and in issues 16 and 17 of Model Engineers Workshop there is a version by a Derek Brookes which can easily be made. It is described by GadgetBuilder.com and is worth a look at.

    I hope that the foregoing comments might be of use.

    Norman
     
    Steen Kruse likes this.
  3. Dec 9, 2019 #63

    Steen Kruse

    Steen Kruse

    Steen Kruse

    New Member HMEM Supporter

    Joined:
    Jan 2, 2019
    Messages:
    3
    Likes Received:
    1
    Gender:
    Male
    Location:
    Denmark
    Thanks Norman.
    I am new here. So where do I find the Drawings.
    maybe I need to get an abo for the Magazine.

    Steen
     
  4. Dec 9, 2019 #64

    goldstar31

    goldstar31

    goldstar31

    Well-Known Member

    Joined:
    Feb 20, 2010
    Messages:
    2,374
    Likes Received:
    525
    Gender:
    Male
    Occupation:
    Haggis Breeder
    Location:
    Twixt Tyne and Tees
    I'm assuming that you mean the one for the 'Brookes.
    You MAY be able to get someone here who will copy them for you or alternatively, direct from the owners of Model Engineer's Workshop of again the two magazines from E-Bay.

    There is a UK site called HomeWorkshop UK where you could place a free advert .
    Sadly, I ran into copyright problems some time back or I could possibly have helped.
    Having written this, perhaps someone here could oblige:)

    So I wish you luck


    Norman
     
    Steen Kruse likes this.
  5. Dec 9, 2019 #65

    goldstar31

    goldstar31

    goldstar31

    Well-Known Member

    Joined:
    Feb 20, 2010
    Messages:
    2,374
    Likes Received:
    525
    Gender:
    Male
    Occupation:
    Haggis Breeder
    Location:
    Twixt Tyne and Tees
    Forgive me but I've just had news of the sad death of a very old friend.
    So whilst my memory is fresh, you might consider the Stent of which plans and castings can be obtained through Blackgates Engineering in the UK.
    I built one years ago and bought a fabricated by welding another. It's a copy of the Clarkson T&C but in my opinion rather better. I do have an old Clarkson as well.
    The Stent uses a Myford type rack and pinion but uses a Quorn type tool holder. My thoughts are that apart from the base, the other parts could be made from rectangular steel bits. The spindle is driven by a 2880 rpm 1/6th HP motor follows the various designs as does the Quorn and the Kennet.

    I'm now guessing but the Stent 'improvements' were also written up in Model Engineer's Workshop magazine .
    The only source about this for me is an even older 92 year old model engineer and he, too, is far from well.

    Why not try a note to others here?

    Regards

    Norman
     
    Steen Kruse likes this.
  6. Dec 9, 2019 #66

    kwoodhands

    kwoodhands

    kwoodhands

    Well-Known Member

    Joined:
    Jan 5, 2010
    Messages:
    77
    Likes Received:
    9
    The plans are in two different books. The first one gives you plans for a simpler one than the second book. I believe the title is " Milling by Harold Hall." The other is 'Tool and Milling Cutter Sharpening". I have both books, latter shows how to make many accessories for the grinder rest.
    Do a search for these books, I'm sure you will find an online book store. If I recall I paid $9.50 each, American .
    Try Amazon as I think I bought them there.
    Personally I like all the accessories but the grinder rest itself I modified. Instead of the complicated rest that tilts and bevels I opted for a simpler version after making the more complicated version of the rests.
    I made a table that holds the accessories the same as Harold's but does not tilt to one side, only tilts forward or backward . I use the time old version of an arc on each side with locking knobs. I move the table in by a 10/32 screw with a knob on the end. This arrangement only pushes the table forward in small increments. I back up the knob and pull the table back when needed. The base is dadoed on each side to keep it in line. Another locking knob tightens the base to the bench. Probably dovetail slots would be better , but the dado does work well.
    So far with Harold Halls accessories I have successfully sharpened many machine drills but not with the 4 facet design , just 2 facets. Also sharpened a 1/2" spotting drill that laid in a drawer for a year because it was dull.
    Whether you use Harold Hall's design or not , both books are interesting reading.
    mike
     
    Ron Lunsford and Steen Kruse like this.
  7. Dec 9, 2019 #67

    goldstar31

    goldstar31

    goldstar31

    Well-Known Member

    Joined:
    Feb 20, 2010
    Messages:
    2,374
    Likes Received:
    525
    Gender:
    Male
    Occupation:
    Haggis Breeder
    Location:
    Twixt Tyne and Tees
    Apologies for some incorrect information. I skated over the Tool Grinding Book because I have the Quorn, the Kennet, the Stent, the Clarkson Mk1 and the Chinese copy of the Deckel/Alexander.
    Again, I have Mr Halls writings in Model Engineers Workshop whilst he was editor.
    Maybe I've seen something there in addition. I have quite a library of grinders- and paperwork

    Norman

    As Mr Hall is or was a member here perhaps he could clarify.
     
    Steen Kruse likes this.
  8. Dec 9, 2019 #68

    fcheslop

    fcheslop

    fcheslop

    Well-Known Member

    Joined:
    Apr 7, 2010
    Messages:
    785
    Likes Received:
    171
    Location:
    The land of the Prince Bishops
    The drawings are in Mr Halls book Milling a complete course
    He also has a good write up and a few mods to the original design on his web site
    http://www.homews.co.uk/page398.html
    Iv recently been having a serious look at this design as Im knee deep in dull cutters and need to sharpen at least a few up
    Also on Mr Hall site is a simpler jig capable of touching cutters up
    Iv made a few of his tools and all have been worth the effort sort of one of those why didnt I make one earlier moments
    cheers
    frazer
     
    Last edited: Dec 9, 2019
    Steen Kruse and goldstar31 like this.
  9. Dec 9, 2019 #69

    Motorman1946

    Motorman1946

    Motorman1946

    Active Member

    Joined:
    Mar 13, 2014
    Messages:
    27
    Likes Received:
    9
    Occupation:
    Retired Marine Enginer
    Location:
    Somerset, England
    I have the book but I also find the website www.homews.co.uk invaluable. As Frazer says, the Grinding Rest Table write up on the website is excellent (and free!) and includes drawings last time I looked, plus there are all sorts of other interesting items there too. Well worth the look
    Chris
     
    Steen Kruse and goldstar31 like this.
  10. Dec 17, 2019 #70

    doc1955

    doc1955

    doc1955

    Gone

    Joined:
    Aug 27, 2009
    Messages:
    1,122
    Likes Received:
    77
    Occupation:
    Retired Former Tool Design Engineer
    Here is my set up for sharpening end mills but you'll have to watch a video to see it sorry.
     
  11. Dec 20, 2019 #71

    awake

    awake

    awake

    Well-Known Member HMEM Supporter

    Joined:
    Sep 5, 2019
    Messages:
    156
    Likes Received:
    30
    Gender:
    Male
    Occupation:
    Educator
    Location:
    North Carolina
    Thanks for that video, Doc. Do you have any videos or write-ups on the overall design, especially the air bearing? Looks like it works great!
     

Draft saved Draft deleted

Share This Page