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  1. #1
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    Default Threads on finishing, finish, good finish

    FYI,

    Was becoming quite frustrated with my poor quality finishes and did a search, restricted to metalwork forum.

    Some good info in these threads that other people may find interesting to read or revise or get round to trying that good idea they saw ............... etc.

    http://www.woodworkforums.com/search...archid=2491710

    Handy that it is possible to refer to a search with a link like this, good feature of the forum.

    Bill

  2. #2
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    Sydney, NSW
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    Default

    Hi Bill,

    used your link, got empty search. Was there something I was supposed to put in?

    Ben

  3. #3
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    Athelstone, SA 5076
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    Default

    Quote Originally Posted by bwal74 View Post
    Hi Bill,

    used your link, got empty search. Was there something I was supposed to put in?

    Ben
    ditto

  4. #4
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    Default Search

    Hey thats interesting.

    I tested that link a few times and it worked, but now it won't, something to do with session and cookies etc ?

    ok,

    1. top right hand corner of this screen click on advanced search link - small letters just below magnifying glass

    2. in new window click on left hand tab called "Search Single Content Type"

    3. in next window key word to search for is finish, search titles only, and forum is metalwork forums - see attached screenshot - if you don't have option for metalwork forums then make sure you have clicked on the "Additional Options. You then get a list off all threads in Metalwork forum with "Finish" in the title - some really interesting threads.



    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Do me a favour and cut & paste the address that your search generates into a new browser window and see if it works.

    If you just do a basic search on the word finish you have to wade through all the pen turning and woodwork posts - hard work.

    Bill
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    Last edited by steamingbill; 13th Jan 2014 at 05:24 PM. Reason: added search titles only

  5. #5
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    Default vertical shear tool - flycutter and boring bar applications

    This is an interesting thread.

    He takes the vertical shear tool idea and then applies it to a facing tool, a boring bar, a fly cutter and a milling cutter.

    The Home Machinist! • View topic - Vertical shear bit

    Seems that its a fairly old idea and well documented in various books.

    Our fire plan is to leave early on dangerous days, so am playing on internet in an air conditioned caravan park.

    Bill

  6. #6
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    Default

    Here is it used on the shaper

    Metal shaper shear tool - YouTube
    Gold, the colour of choice for the discerning person.

  7. #7
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    Default finish

    Bill

    This is what i use on free machining steel, for the last .003" or so cut . It leaves a beaut finish , even on that horrible black stuff . I hone the edge of course .

    Mike
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  8. #8
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Default

    Quote Originally Posted by morrisman View Post
    Bill

    This is what i use on free machining steel, for the last .003" or so cut . It leaves a beaut finish , even on that horrible black stuff . I hone the edge of course .

    Mike
    Hi Mike,
    How does it go on longer parts that may have a tendency to flex and chatter? I have a similar tool but have found it tends to like to chatter unless the part is either large in dia or near to its support. No feed rates, speed or DOC changes seem to help. I would think it has to do with the lack of back rake, but i have tried it in an angled toolholder and it was no better.
    Thu Uber shear is my HSS finishing tool of choice now. Of course the finish is never as good as a good carbide cut (or the round nose tool for that matter) but it will take a whisker off if required.

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  9. #9
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    Default Radius of HSS finishing tool

    Quote Originally Posted by morrisman View Post
    Bill

    This is what i use on free machining steel, for the last .003" or so cut . It leaves a beaut finish , even on that horrible black stuff . I hone the edge of course .

    Mike
    Mike,

    I found the pages you had scanned regarding various tests done on quality of finish, when comparing various radius tools and leaving everything else constant, the 1/4" radius finishing tool left the best finish.

    Bill

  10. #10
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    Default finish

    Quote Originally Posted by Ueee View Post
    Hi Mike,
    How does it go on longer parts that may have a tendency to flex and chatter? I have a similar tool but have found it tends to like to chatter unless the part is either large in dia or near to its support. No feed rates, speed or DOC changes seem to help. I would think it has to do with the lack of back rake, but i have tried it in an angled toolholder and it was no better.
    Thu Uber shear is my HSS finishing tool of choice now. Of course the finish is never as good as a good carbide cut (or the round nose tool for that matter) but it will take a whisker off if required.

    Ew


    Hi Ewan

    I must admit: I have not used that tool for longer work pieces - most of my work is near the chuck . That tool does have a few degrees of back rake ( not easy to see in the pics ) . Mike

  11. #11
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    Default big lathes

    Quote Originally Posted by steamingbill View Post
    Mike,

    I found the pages you had scanned regarding various tests done on quality of finish, when comparing various radius tools and leaving everything else constant, the 1/4" radius finishing tool left the best finish.

    Bill
    Bill, keep in mind - those charts I posted are for large industrial lathes which are very rigid and powerful . I am still learning and I dont think I will ever get to grips with tool sharpening

  12. #12
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    Default

    Quote Originally Posted by steamingbill View Post
    This is an interesting thread.

    He takes the vertical shear tool idea and then applies it to a facing tool, a boring bar, a fly cutter and a milling cutter.

    The Home Machinist! • View topic - Vertical shear bit

    Seems that its a fairly old idea and well documented in various books.

    Our fire plan is to leave early on dangerous days, so am playing on internet in an air conditioned caravan park.

    Bill
    HI Bill.
    I try that tool me self and it didn't work on my machine for some reason. i have too much chatter with that tool.
    i gave up after a few test .
    Peter

  13. #13
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Quote Originally Posted by thorens View Post
    HI Bill.
    I try that tool me self and it didn't work on my machine for some reason. i have too much chatter with that tool.
    i gave up after a few test .
    Peter
    It's not just you Peter, i had trouble with the same tool. That is why i sharpened this tool up. Sorry i don't have a pic of it front on.

    Ew
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    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  14. #14
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    Default Essentially the same tool ?

    Quote Originally Posted by Ueee View Post
    It's not just you Peter, i had trouble with the same tool. That is why i sharpened this tool up. Sorry i don't have a pic of it front on.

    Ew

    Ew,

    Isn't that essentially the same tool ? The cutting is done by a point on a sharp edge in a plane that is tangential to the work ? Or have I misunderstood the photo and all of the cutting is done by the point ?

    Yellow spot vs red line in attached sketch



    Bill
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  15. #15
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    Default

    It is tangential, the red line is the cutting edge. The difference is the included angle of the cutting edge, the ones in the link are probably 80-90deg, mine is more like 45deg.

    Looking from the front of the tool the cutting edge is slanted maybe 5deg (from vertical) from left (top) to right. The V grind that gives the angle is parallel to the HSS, the angle is made by grinding the front of the tool at an angle, so you are grinding into the V more at the top.

    There is a video of one Phil put up some time back, i'll try to find the link.

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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