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Thread: Precision Pillar Drill

  1. #1
    editor@glue-it.com's Avatar
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    [email protected]'s Tools

    Precision Pillar Drill

    I have an Emco Unimat 3 lathe that I've had for a long time:
    Emco Unimat 3 – glue-it.com

    However, although the pillar mill/drill attachment is really useful it is a pain to keep converting the lathe between mill/drill and lathe. This got me wondering if I could buy another pillar on ebay and make a base and table for a permanent pillar drill.

    Precision Pillar Drill-img_0546.jpg

    The full article is here:

    Unimat 3 Pillar Drill – glue-it.com

    I've got a slightly more powerful sewing machine motor for it now and this also rotates in the correct direction so that it can hang down under the pulleys. The result is a tiny pillar drill that sits perfectly on the model making bench. Overall it is around 40cm high.

  2. The Following 7 Users Say Thank You to [email protected] For This Useful Post:

    downtheroad (06-18-2017), Hemi (04-09-2017), old_toolmaker (04-03-2018), Paul Jones (04-09-2017), Scotsman Hosie (04-11-2019), threesixesinarow (03-25-2019), Toolmaker51 (04-10-2017)

  3. #2
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    Paul Jones's Tools
    [email protected],

    You have a great idea. The conversion and adaptation of the mill/drill attachment is nicely made. Also thanks for the link to your website.

    Paul

  4. #3
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    Hemi's Tools
    NICE!!!! I have planned to do something similar, only using SL1000 & DB200 parts, to make sort-of a Unimat 3..... BUT mine will bolt to the bench when I'm done....

  5. #4
    Content Editor DIYer's Avatar
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    Thanks [email protected]! We've added your Precision Drill Press to our Drilling and Drill Presses category,
    as well as to your builder page: [email protected]'s Homemade Tools. Your receipt:




  6. #5
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    [email protected]'s Tools
    I've updated the Unimat Pillar Drill - the bracket that holds the table was never quite right with regards to the accuracy of the hole and so the table was not quite dead upright. So I filled the hole with Durafix and then machined the hole again in place on the pillar drill.

    Precision Pillar Drill-unimat-drill-24.jpg

    It's now absolutely spot on in terms of accuracy

  7. The Following User Says Thank You to [email protected] For This Useful Post:

    Paul Jones (03-25-2019)

  8. #6
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    [email protected],

    Nice Conversion Job!!! What is the drilling capacity in terms of max drilling depth and chuck capacity?
    Dick


    Links to some of my plans:

    http://www.homemadetools.net/forum/f...6068#post65876 OFF-SET TAILSTOCK CENTER PLANS
    http://www.homemadetools.net/forum/s...995#post112113 SMALL TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/l...994#post112111 LARGE TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/m...383#post110340 MINI-LATHE CARRIAGE LOCK PLANS
    http://www.homemadetools.net/forum/s...191#post106483 SMALL QC TOOL POST PLANS
    http://www.homemadetools.net/forum/q...849#post119345 QUICK CHANGE LATHE TURRET
    http://www.homemadetools.net/forum/m...949#post119893 MINI LATHE COMPOUND PIVOT MODIFICATION

  9. #7
    editor@glue-it.com's Avatar
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    [email protected]'s Tools
    the maximum chuck capacity is 9mm - but this can be increased if you use the 3-jaw lathe chuck
    the spindle is threaded 14x1mm
    Travel = ? will have to measure this along with the maximum throat

  10. The Following User Says Thank You to [email protected] For This Useful Post:

    old_toolmaker (03-26-2019)

  11. #8
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    old_toolmaker's Tools
    [email protected],

    I own a couple of Unimat DB-200 lathes so I know what they are capable of doing.
    I have not had a Unimat 3 in my hands, so I am wondering what diameter the post is? I am assuming it is larger than the DB post and therefore more rigid...
    Could you tell me what the diameter is?
    Dick


    Links to some of my plans:

    http://www.homemadetools.net/forum/f...6068#post65876 OFF-SET TAILSTOCK CENTER PLANS
    http://www.homemadetools.net/forum/s...995#post112113 SMALL TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/l...994#post112111 LARGE TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/m...383#post110340 MINI-LATHE CARRIAGE LOCK PLANS
    http://www.homemadetools.net/forum/s...191#post106483 SMALL QC TOOL POST PLANS
    http://www.homemadetools.net/forum/q...849#post119345 QUICK CHANGE LATHE TURRET
    http://www.homemadetools.net/forum/m...949#post119893 MINI LATHE COMPOUND PIVOT MODIFICATION

  12. #9
    editor@glue-it.com's Avatar
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    [email protected]'s Tools
    I've just measured all of the specifications:

    Motor power: 120W @ 7000rpm
    Ratios: 3.7:1 and 2.5:1
    Spindle speeds: 1900rpm & 2800rpm
    Spindle mount: 14x1mm
    Spindle travel: 25mm
    Throat: 64mm
    Max chuck to table: 122mm (3mm drill bit max is ~85mm)
    Dividing plate: 6, 8 and 10 holes
    Divisions available: 1, 2, 3, 4, 5, 6, 8, 10
    Table mount: 14x1mm
    Column diameter: 28mm
    Column length: 325mm

  13. #10
    editor@glue-it.com's Avatar
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    [email protected]'s Tools
    The column is 28mm diameter and never had a problem with rigidity of the column and have used this for gear cutting.

    I have a Hobbymat lathe and I fix this column to the cross-slide and an indexing plate to the back of the hobbymat spindle:
    Gear Cutting with the Hobbymat MD65 – glue-it.com

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