Precision micro drill press

Discussion in 'Horological Tools' started by Sanjay Bajpai, Mar 7, 2019.

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  1. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    #1 Sanjay Bajpai, Mar 7, 2019
    Last edited: Mar 7, 2019

    Made a precision drill press out of a compound microscope stand. Very useful for precision drilling including bushings etc providing clean holes. Can even drill laterally in rods. Good with carbide bits as feed speed can be precisely controlled. General capability is around 2mm in SS and upto 3-4mm in Al without the motor being overloaded with correct feed I.e. Chips from both cutting surfaces

    Regards
    Sanjay Bajpai
     
    kevin h likes this.
  2. David S

    David S Registered User
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    How about some pictures...please.

    David
     
  3. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    Dear David,
    Did try to embedded a video ex utube. It seems it did not appear in the thread.
    Pics included now please.
    Thought it will help in repair
    Regards
    Sanjay

    20190307_220941.jpg 20190307_220934.jpg 20190307_220922.jpg 20190307_220915.jpg
     
  4. Sanjay Bajpai

    Sanjay Bajpai Registered User

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    Some add pics please

    15519770852391609029053908401247.jpg 15519771296167584686671717900227.jpg
     
  5. MartinM

    MartinM Registered User

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    Nice bit of re-use!
     
  6. Sanjay Bajpai

    Sanjay Bajpai Registered User

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    Thanks Martin
    But to male it I cut up a new microscope. Fortunately the precision it gives is second to CNC and good for clean vertical holes. If you draw lines by frothing needles n pinch starter points it good enough to maintain gear or wheel axis.
    Has been helpful to me
    Regards
    sanjay
     
  7. David S

    David S Registered User
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    Nice going Sanjay, What is the actual drill you are using?

    David
     
  8. Sanjay Bajpai

    Sanjay Bajpai Registered User

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    Dear David
    Mounted one is 1.4mm cobalt
    Regards
    Sanjay
     
  9. DeweyC

    DeweyC Registered User
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    THAT is clever! You have a great imagination. The feed on that is terrific. The finish is fantastic.

    What is the smallest you can drill with carbide with that motor/spindle? What motor are you using?

    I suppose someone is going to suggest using a WW headstock or Levin milling spindle; but adding an external motor makes it cumbersome.


    Regards,

    Dewey
     
  10. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    Dear Dewery,
    Thank you so much. Smallest drill in soft materials is around 0.3 mm that I have tried with very slow feed. You are right a WW headstock of spindle would make it more accurate but I needed a quick workpiece and this felt suitable and compact for small work. Motor is 775 run by a 2A adaptor. Motor is within the AL sleeve which is bolted to the cut microscope tube so for small work its rigid enough. Well that what I thought best.

    Regards
    Sanjay Bajpai
     
  11. DeweyC

    DeweyC Registered User
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    30/100mm with carbide? Brilliant. For others, can you specify the motor and where to find it? To be clear, I was not suggesting a WW headstock, I was saying it may well be extra bulk for no reason. Your 30/100 mm sure suggests that is the case.

    I really like it. And a very small footprint to boot. Here goes the price of compound microscope stands!
     
  12. Sanjay Bajpai

    Sanjay Bajpai Registered User

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    Dear Clark
    Thanks
    Regards
    sB
     
  13. wefalck

    wefalck Registered User

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    The precision that can be achieved and the prevention of loss of drill all bears down to the bearings of the motor. I gather your motor has ball-bearings ? The problem with a lot of these motors is also that they are not really made for axial loads, as will occur in a drill. However, it is all a question of what the machine is meant for. There endless ways for sophistication.
     
  14. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    Dear Wefalck,
    absolutely correct please. I have only tried till 0.2mm and use it for clocks so the precision might be ok. secondly i have installed small thrust bg on the rear of the shaft of motor to avoid axial play. this makes the shaft load the thrust bg rather than th ball bg. well no use beyond this. after this cnc might be the answer
    regards
    sanjay bajpai
     
    DeweyC likes this.
  15. mossing

    mossing New Member

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    excellent
     
  16. kevin h

    kevin h Registered User

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    very nice , I was pondering this same problem , once in a while I need to drill a small hole and would love to have that ! What is the actual motor assemble you are using ?
     

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