Free 173 Best Homemade Tools eBook:  
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 12

Thread: Lathe Compound Drill

  1. #1
    Supporting Member
    Join Date
    Jun 2019
    Posts
    8
    Thanks
    1
    Thanked 19 Times in 5 Posts

    Lathe Compound Drill

    So I often find myself in a bind when wanting to drill an offset hole in a workpiece. Drilling from the tailstock only allows for holes drilled dead center in the workpiece. I have had this idea floating around in my head for some time now, so decided to get going and see whether it would work.

    The idea was to mount a drill in place of the toolpost. However, mounting a normal handdrill was a bit of a mission and I wanted something dedicated to the lathe.

    First off was to source a motor, so I paid a visit to our local gate automation go-to guy, who kindly donated a motor from and old Centurion D5 gate motor.

    The motor needed a few measurements and modifications, since the mounting method would change completely. The motor was stripped and cleaned.
    Lathe Compound Drill-enubqzp.jpg Lathe Compound Drill-xzet0vj.jpg

    The front face (top left) which was originally square with 4 mounting holes in the corners, was turned down to just a tad smaller than the motor body.
    Lathe Compound Drill-sohvfva.jpg Lathe Compound Drill-me6wrha.jpg

    Then, with measurements in hand, I paid a visit to my friendly machine shop that made the new mounting for the toolpost.
    Lathe Compound Drill-hgu9884.jpg

    Machined so that it can be flipped over and still be dead center, it fits onto the lathe in place of the toolpost like this.
    Lathe Compound Drill-grtzgdj.jpg

    Or like this
    Lathe Compound Drill-vb6px3a.jpg

    Next was to cut the shaft shorter and turn it down
    Lathe Compound Drill-zfcjofr.jpg

    Lathe Compound Drill-kdd6uen.jpg

    to accommodate a 3/8 X 24 thread.
    Lathe Compound Drill-9shklza.jpg

    Onto which a keyless chuck has been mounted.
    Lathe Compound Drill-dnv11on.jpg

    I can now drill holes like this.
    Lathe Compound Drill-8ayqvrj.jpg


    Next up is to get my indexing wheel sorted.

  2. The Following 13 Users Say Thank You to Jughead For This Useful Post:

    baja (09-17-2019), bruce.desertrat (09-16-2019), Cowboy00 (09-18-2019), Crusty (09-16-2019), DIYer (09-19-2019), DIYSwede (09-15-2019), high-side (09-21-2019), Jon (09-15-2019), oldpastit (09-17-2019), Scotty12 (09-20-2019), Sleykin (09-17-2019), Stevohdee (09-16-2019), Toolmaker51 (09-20-2019)

  3. #2
    Supporting Member DIYSwede's Avatar
    Join Date
    May 2019
    Location
    Stockholm, Sweden...
    Posts
    183
    Thanks
    165
    Thanked 158 Times in 65 Posts

    DIYSwede's Tools
    Nice, clean job for a first entry, and welcome onboard HMT, Jughead!
    Some ratings of the motor would be nice.
    -Guess it's a 150W unit, with abt 4000 rpm @ 12 V?
    Did you use a 3/8 - 24 die, or did you cut the thread in the the lathe?
    Also clever to mill the mount so you just could flip it over for radial drilling!

    Keep up the good work!
    Cheers
    Johan

  4. #3
    Supporting Member
    Join Date
    Jun 2019
    Posts
    8
    Thanks
    1
    Thanked 19 Times in 5 Posts
    Quote Originally Posted by DIYSwede View Post
    Nice, clean job for a first entry, and welcome onboard HMT, Jughead!
    Some ratings of the motor would be nice.
    -Guess it's a 150W unit, with abt 4000 rpm @ 12 V?
    Did you use a 3/8 - 24 die, or did you cut the thread in the the lathe?
    Also clever to mill the mount so you just could flip it over for radial drilling!

    Keep up the good work!
    Cheers
    Johan
    Thanks Johan

    The motor is a King Right F7147-E, 12V and 3000RPM. I cannot find any other specs on it but assume it's around 80W. The speed is a little excessive, so will be building a speed control for it in the near future.

    Yes, the thread was cut with a die, as I had one and it was the quickest and most convenient.

  5. #4
    Supporting Member DIYSwede's Avatar
    Join Date
    May 2019
    Location
    Stockholm, Sweden...
    Posts
    183
    Thanks
    165
    Thanked 158 Times in 65 Posts

    DIYSwede's Tools
    Closest I've found is the "-H" flavor:
    Lathe Compound Drill-king-right-f7147h.jpg
    Guess you could compare their physical dimensions to guesstimate your motor's wattage,
    and for short, intermittent use you can triple that nominal effect.
    A cheapo 24 VDC 15A PWM regulator should get you a cost-effective regulator.

    Good luck!

  6. #5
    Content Editor DIYer's Avatar
    Join Date
    Aug 2013
    Posts
    3,091
    Thanks
    458
    Thanked 980 Times in 903 Posts


    Thanks Jughead! We've added your Lathe Compound Drill to our Lathe Accessories category,
    as well as to your builder page: Jughead's Homemade Tools. Your receipt:




  7. The Following User Says Thank You to DIYer For This Useful Post:

    Jughead (09-30-2019)

  8. #6
    Jon
    Jon is online now Jon has agreed the Seller's Terms of Service
    Administrator
    Supporting Member
    Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    16,792
    Thanks
    4,009
    Thanked 17,054 Times in 5,017 Posts
    Congratulations Jughead - your Lathe Compound Drill is the Homemade Tool of the Week!

    Good win on a very busy week around here!

    Some more nice builds from this week:

    Roller Bender by meanwhileinthegarage
    Welding Helmet Modification by theeddies
    V-Block by celsoari
    Sheetmetal Brake by ruxu
    Lead Hammer by Philip Davies
    Wood Chipper by Vyacheslav.Nevolya
    Rock Tumbler by JKeetonKnives
    Mini Lathe Carriage Lock by SculptyWorks
    Broach by Spira Knives
    Lathe Chuck Wrench by gatz
    Compact Live Center by SculptyWorks
    Notch Cutting Method by rgsparber
    Tailstock Die Holder by SculptyWorks
    Scissor Lift Table by TomBuilder
    Mechanic's Creeper by athomp
    Brake by Savage11
    Circle Jig by Make Things
    Power Cord Reel by HandmadeCreativeChannel
    Disc Sander by Foxtrot_
    Biscuit Joiner by rep
    Sheetmetal Cutter by Kwandotechnic
    Gasket Making Method by Catfish
    Signal Generator by TilenThaler
    Induction Furnace by Itanc
    Fish Table Hold Down Lock by Don42
    Drum Sander by Mazay
    Panel Clip Tool by UPbuild


    Jughead - we've added your tool entry to our All Homemade Tool of the Week winners post. And, you'll now notice the wrench-on-pedestal award in the awards showcase in your postbit, visible beneath your username:



    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 award choice and I'll get it sent over right away.

    Nice work!
    Homemade Tools Supporters Forum
    Tool plans, build guides, ebooks, and more.

    Click here to become a supporter

  9. The Following 2 Users Say Thank You to Jon For This Useful Post:

    rlm98253 (09-20-2019), Subtlehustle (09-22-2019)

  10. #7
    Supporting Member
    Join Date
    Jun 2019
    Posts
    8
    Thanks
    1
    Thanked 19 Times in 5 Posts
    Over the weekend I realised there was an issue with my compound drill. I had cut the motor shaft down and placed the keyless chuck quite close to the motor body and mounting. This meant that in certain positions, my hand was designed in such a way that I couldn't get a proper grip on the knurled part of the chuck to be able to loosen it.

    This is the chuck position.
    Lathe Compound Drill-uz9gqsw.jpg

    And this is as close as my hand can get while still leaving room for the other hand to loosen the red collar.
    Lathe Compound Drill-w88awdb.jpg

    So I decided to make use of this short piece of the shaft that protrudes from the rear of the motor.
    Lathe Compound Drill-rw0sryc.jpg

    First off was to knurl an appropriately size piece of aluminium
    Lathe Compound Drill-0925ab6.jpg

    Drill a few holes in it. (These where done just because I now can :biggrin
    Lathe Compound Drill-otgfymj.jpg

    And end up with this
    Lathe Compound Drill-aysusuy.jpg

    In all honesty, the 2 lines running around the circumference are there because after drilling the small hole for the grub screw, I accidentally turned the lathe on instead of turning the drill off. I just added the second line to make it look as though it was planned. :o Will have to make some type of security feature to prevent that in the future.

    When fitted to the motor, it looks like this.
    Lathe Compound Drill-tyv2jyj.jpg

    And now makes it possible to hold the one end of the motor with one hand, whilst loosening the chuck on the other end with the other hand.
    Lathe Compound Drill-0fyqtbx.jpg

    Oh yes, and the motor now boasts a speed control. It is still in the "loose wiring everywhere" phase, but it will shortly be mounted as it should be. (Excuse the poor camera handling, and the chuck appears to have a bit of a wobble. That is ,however, just the red plastic locking collar. The drillbit is center with no wobble whatsoever.)

    Last edited by Jughead; 09-30-2019 at 01:04 AM.

  11. The Following User Says Thank You to Jughead For This Useful Post:

    SASocal (09-30-2019)

  12. #8

    Join Date
    Dec 2018
    Posts
    4
    Thanks
    2
    Thanked 4 Times in 1 Post
    Loving your drill attachment. Thats my next move [ after getting a bigger lathe ] I went down this rabbit hole for the 7x Mini Lathe ..

    Indexing wheel for the mini lathe. Uses a printed cinch collet inside the arse end of the spindle. Main Base mounts to the lathe headstock in stock holes for the existing cover. Locking Mechanism cinches down on the two locking nuts of the spindle [ with a plastic part - safe and easy ]

    Lathe Compound Drill-2019-09-30_0824.png

    Lathe Compound Drill-2019-09-30_0827.png

    Main Base ...
    Lathe Compound Drill-2019-09-30_0832.png

    Lathe Compound Drill-2019-09-30_0834.png

  13. The Following 4 Users Say Thank You to SASocal For This Useful Post:

    benkeller3 (10-01-2019), DIYSwede (09-30-2019), Jon (09-30-2019), mwmkravchenko (10-01-2019)

  14. #9
    Supporting Member
    Join Date
    Jun 2019
    Posts
    8
    Thanks
    1
    Thanked 19 Times in 5 Posts
    Interesting

    I am working on the indexer for my lathe. I have already fitted the 72 tooth wheel into the gearbox, but still need to figure out the locking mechanism. My criteria are as follows:

    1. Needs to be unlocked in the normal, relaxed position.
    2. Effort needs to be made to engage it to prevent it being accidentally bumped or inadvertently placed in the locked position while the lathe is running.
    3. Needs to disable the lathe while in the locked position.
    4. Needs to have a mechanism to temporarily disengage to change position without unlocking and relocking.

    I have some ideas in my head, but need to make a temporary, partial cover for the gearbox to experiment with.

  15. #10
    benkeller3's Avatar
    Join Date
    Aug 2014
    Posts
    11
    Thanks
    62
    Thanked 5 Times in 4 Posts
    Did you 3D print that and if so would share the STLs?

    I would love to adapt that to an Emco 5 lathe.

Thread Information

Users Browsing this Thread

There are currently 2 users browsing this thread. (0 members and 2 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
  •