Free 173 Best Homemade Tools eBook:  
Remove advertisements
Page 2 of 6 FirstFirst 1 2 3 4 5 6 LastLast
Results 11 to 20 of 53

Thread: Dial Indicator Attachment

  1. #11
    mklotz mklotz's Avatar
    Join Date
    Aug 2015
    Location
    LA, CA, USA
    Posts
    1,572
    Thanks
    104
    Thanked 2,942 Times in 1,022 Posts

    mklotz's Tools
    Quote Originally Posted by metric_taper View Post
    Also doing part off work on my 10X20 bench lathe was impossible, until I procured a 2" plate that it is now bolted too. It used to "walk" on the floor with very light parting operations. It never came with a mounting stand. Then 25 years ago, I purchased a stand from harbor freight intended for their 12x32 lathe. It was 2 sheet metal rectangle boxes with a sheet metal web between. I trimmed the web to length for my shorter lathe. But with any parting cut, the lathe would go into harmonic oscillation. I played with the cutter. Procured other cutters. Never could get a problem free parting to be realized. The 2" thick steel plate fixed this. If I would have made a weldment stand, and bolted it to the floor, that would have fixed this as well.
    Steve
    Parting off is often problematic for small lathe users. Some suggestions...

    Make the tool dead sharp with sufficient relief

    Ensure the tool is perpendicular to the lathe axis and on center

    Use a lubricant - kerosene for aluminum, sulfurated cutting oil for steel, nothing for brass or cast iron

    An improvised lubricant feeder like my...

    Parting-off oiler

    can provide a steady supply of lubricant

    Keep the speed on the low side

    If you grind the tip of the tool so that the right corner projects just slightly more than the left, then the burr that exists when the workpiece falls off will be on the stock and not the workpiece. Drive the tool in a tiny bit more and the burr will be cut off the stock.
    ---
    Regards, Marv


    Home Shop Freeware
    http://www.myvirtualnetwork.com/mklotz

  2. The Following User Says Thank You to mklotz For This Useful Post:

    jjr2001 (05-11-2017)

  3. #12
    mklotz mklotz's Avatar
    Join Date
    Aug 2015
    Location
    LA, CA, USA
    Posts
    1,572
    Thanks
    104
    Thanked 2,942 Times in 1,022 Posts

    mklotz's Tools
    Some more thoughts on thumbscrews.

    Knurled screws are attractive but can be uncomfortable if they must be gripped tightly to do their job. If only for occasional, delicate adjustments, like a micrometer barrel, they're fine but for frequent adjustments requiring a firm grip (e.g. the handles on a threading die stock) they can be uncomfortable.

    One solution is to run a file over the knurls after they've been formed. This will knock the tops off the little pyramids that form the knurl and make it more comfortable to handle.

    For beefier stuff I prefer fluting. It provides a firm grip and is much easier on the hands. An example is my tripod quick release handle...

    Tripod quick release
    ---
    Regards, Marv


    Home Shop Freeware
    http://www.myvirtualnetwork.com/mklotz

  4. The Following User Says Thank You to mklotz For This Useful Post:

    jjr2001 (05-11-2017)

  5. #13
    Ralphxyz's Avatar
    Join Date
    Dec 2016
    Posts
    358
    Thanks
    0
    Thanked 66 Times in 55 Posts

    Ralphxyz's Tools
    Marv, re: "grind the tip of the tool so that the right corner projects just slightly more than the left, then the burr that exists when the workpiece falls off will be on the stock and not the workpiece"

    Why not just the opposite then there is no burr to remove?
    Ralph

  6. #14
    metric_taper's Avatar
    Join Date
    Mar 2017
    Location
    Marion, Iowa
    Posts
    136
    Thanks
    51
    Thanked 62 Times in 37 Posts

    metric_taper's Tools
    Quote Originally Posted by mklotz View Post
    Parting off is often problematic for small lathe users. Some suggestions...
    <snip>
    I recall Tee-Nut saying that the parting operation should sound like bacon frying. When the machine don't dance on the floor, you can really hear that.
    Last edited by metric_taper; 05-11-2017 at 08:06 PM.

  7. #15

    Join Date
    Aug 2012
    Posts
    14
    Thanks
    0
    Thanked 12 Times in 6 Posts
    Ralph,

    it's generally accepted that the piece you've just parted off will be difficult to rechuck, so making that piece not have the pip is good practise - the remaining stock (still in the chuck) can then be refaced and the pip from the parting removed.

    there is generally a pip because of the angled grind of the parting tool (causing the chip to curl), or due to the piece breaking away once the diameter is reduced enough

    Des



    Quote Originally Posted by Ralphxyz View Post
    Marv, re: "grind the tip of the tool so that the right corner projects just slightly more than the left, then the burr that exists when the workpiece falls off will be on the stock and not the workpiece"

    Why not just the opposite then there is no burr to remove?
    Ralph
    Last edited by desbromilow; 05-12-2017 at 03:47 AM.

  8. #16
    mklotz mklotz's Avatar
    Join Date
    Aug 2015
    Location
    LA, CA, USA
    Posts
    1,572
    Thanks
    104
    Thanked 2,942 Times in 1,022 Posts

    mklotz's Tools
    Quote Originally Posted by Ralphxyz View Post
    Marv, re: "grind the tip of the tool so that the right corner projects just slightly more than the left, then the burr that exists when the workpiece falls off will be on the stock and not the workpiece"

    Why not just the opposite then there is no burr to remove?
    Let me try to explain a bit more clearly, Ralph.

    When parting there is almost always a burr generated when the part is freed from the parent material, even with a squarely ground tool. As the cut approaches the center the remaining material gets thinner and thinner, thus weaker and weaker. At some point before the cut is completed, the material is so weak that it fractures before the cut can be completed, thus leaving the burr, material that didn't have a chance to be cut before the fracture occurred.

    If the burr is on the part, it can be awkward to remove, perhaps necessitating rechucking. If the burr is left on the stock, it can be removed easily by simply turning the tool a bit farther until it cuts to center.

    By grinding the tool with a right-hand leading edge, the part will be cut loose before the remaining stock at the stock side of the cut gets weak enough to fracture, thus assuring that the burr is left on the stock.
    ---
    Regards, Marv


    Home Shop Freeware
    http://www.myvirtualnetwork.com/mklotz

  9. #17
    Jon
    Jon is online now Jon has agreed the Seller's Terms of Service
    Administrator Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    13,300
    Thanks
    2,557
    Thanked 4,989 Times in 1,892 Posts
    Congratulations rossbotics - your Dial Indicator Attachment is the Homemade Tool of the Week!

    Another strong week, with a rare two-in-a-row win for rossbotics after last week's Tilting Dividing Fixture Homemade Tool of the Week by rossbotics. rossbotics joins three other tool builders who have also won Homemade Tool of the Week in back-to-back weeks:

    Brendon - Marking Gauge on 7/17/15 followed by Dovetailing Bench on 7/24/15.

    mklotz - Bench Block Enhancements on 5/27/16 followed by Model Cement Mixer on 6/3/16.

    tonyfoale - Horizontal Milling Machine on 12/23/16 followed by Drum Brake Grinder on 12/30/16.

    Like the Superbowl, nobody has ever won three in a row.


    Some nice picks from this week: a Shop Air Cleaner by mr95gst, a Powered X-Axis by bobs409, a Tube Notching Method by Tuomas, a Clamp Plate Forming Tool by KustomsbyKent, and a Hardware Storage Unit by bobs409. There were three good builds by Frank S - Alignment and Distance Tool, Backhoe Receiver Hitch, and a Drill Bit Extension. And, we also saw a nice Rotating Tail Stock Chuck by jjr2001, who is rapidly climbing the Top Builders List with 118 total homemade tools.


    rossbotics - you'll be receiving a $25 online gift card, in your choice of Amazon, PayPal, or bitcoin. Please PM me your current email address and gift card choice and I'll get it sent over right away.

    That's win #15 for rossbotics! Here are all of your wins:


  10. The Following User Says Thank You to Jon For This Useful Post:

    rossbotics (12-01-2017)

  11. #18
    Ralphxyz's Avatar
    Join Date
    Dec 2016
    Posts
    358
    Thanks
    0
    Thanked 66 Times in 55 Posts

    Ralphxyz's Tools
    I understand, I was thinking the fall off piece is just waste, the part left on the lathe was the work piece.

    Of course I am brand brand new to machining so I have not even done a project on my lathe yet.

    Ralph

  12. #19
    mklotz mklotz's Avatar
    Join Date
    Aug 2015
    Location
    LA, CA, USA
    Posts
    1,572
    Thanks
    104
    Thanked 2,942 Times in 1,022 Posts

    mklotz's Tools
    Congratulations, Doug; very well deserved.
    ---
    Regards, Marv


    Home Shop Freeware
    http://www.myvirtualnetwork.com/mklotz

  13. #20
    rossbotics rossbotics's Avatar
    Join Date
    Dec 2013
    Location
    Florida
    Posts
    554
    Thanks
    704
    Thanked 1,043 Times in 289 Posts

    rossbotics's Tools
    Thank You Very Much, Marv
    Comments are always welcome
    Doug



    Tool Plans for Sale by rossbotics




Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •