Forums Modeling Tools and Tips
  • Topic: Non vertical drilling problem?

    Back To Topics
    (0 rates)
    • June 20, 2017 12:49 AM EDT
      • Port Orchard, Washington
         
      • Posts
        1,693
      • Thanks
        60
      • Thanked
        79
      • Reputation
        Well Respected

      Non vertical drilling problem?

      I need help solving a problem. I'm trying to drill a #52 hole in a piece of brass about 1/4" thick. I clamped the brass piece to the drill press table, and lined up the bit. As I'm drilling the bit wanders from 90 degrees vertical to a 80 to 70 degree angle. I'm using a light oil as cutting fluid, but what else am I doing wrong? My only guess is that I have too much of the drill bit shaft out of the collet, and as I cut it bends.

      The other question is can I plug the hole with a brass rod, and solder together. If I do that will the new drill hole wander into the previous hole? This beginner machinist needs some help!

      Craig
    • June 20, 2017 1:37 AM EDT
      • Burbank, CA
         
      • Posts
        1,048
      • Thanks
        23
      • Thanked
        69
      • Reputation
        Well Respected

      Craig Townsend said:
      I need help solving a problem. I'm trying to drill a #52 hole in a piece of brass about 1/4" thick. I clamped the brass piece to the drill press table, and lined up the bit. As I'm drilling the bit wanders from 90 degrees vertical to a 80 to 70 degree angle. I'm using a light oil as cutting fluid, but what else am I doing wrong? My only guess is that I have too much of the drill bit shaft out of the collet, and as I cut it bends. The other question is can I plug the hole with a brass rod, and solder together. If I do that will the new drill hole wander into the previous hole? This beginner machinist needs some help! Craig

      Craig,

      First of all, use a #1 center drill (.0468 dia. X .125 body dia.) to start the hole. Don't depend on a prick punch mark. This is a small drill (.063), so you need to push the drill as far into the collet as feasibly possible. You are only going through 1/4 inch thick stock, so you only need slightly more than that amount showing out of the collect. Better yet, only have about an 1/8 showing to go part way. Drill it dry. No oil. You will be "peck drilling". In other words start the #52 drill into the center drilled hole and cut maybe .020 to .030 deep and pull the drill out . Clear the chips and start the drill again. Go another .020-.030 and back off again. You will get a nice straight hole that way. Every hole I ever drill starts with a center drill. I don't do it any other way.

      As to your other question about plugging the hole: you CAN plug the hole and if you peck drill as I suggested, the drill should NOT follow the old hole. Remember this: Center drill and then choke the drill up as short as possible. Peck drill and do it DRY. You'll be good to go. I have been a machinist/die sinker for over 50 years. You have probably seen some of my machining projects posted on LSC.

      This post was edited by Gary Armitstead at August 31, 2017 8:39 AM EDT
    • June 20, 2017 3:19 AM EDT
      • KENILWORTH, WARWICKSHIRE UK. (Just up the road from Stratford-Upon-Avon)
         
      • Posts
        621
      • Thanks
        21
      • Thanked
        28
      • Reputation
        Well Respected

      Good advice....Nay!  EXCELLENT advice.

      This post was edited by Ross Mansell at June 20, 2017 8:46 AM EDT
    • June 20, 2017 4:06 PM EDT
      • Carlsbad, CA
         
      • Posts
        6,166
      • Thanks
        77
      • Thanked
        272
      • Reputation
        Respected

      Would think a sharp drill would not wander so much.

      Greg

      ____________________________________

      Be sure­ to visit ­my site, l­ots of tec­hnical tip­s and modi­fications,­ and you c­an search ­for topics­ and key w­ords.


      ­Click HERE for Greg­'s web sit­e
      PLEASE NOT­E: Please do NOT use private messaging, i­f you have­ a questio­n, feel fr­ee to emai­l me priva­tely, u­se regular­ email onl­y: greg@el­massian.co­m

    • June 20, 2017 6:29 PM EDT
      • Port Orchard, Washington
         
      • Posts
        1,693
      • Thanks
        60
      • Thanked
        79
      • Reputation
        Well Respected

      Thanks for the info. As I suspected, I had way too much of the drill bit out of the collet. And yes these are pretty new drill bits. Off to fire up the resistance soldering unit and solder in a rod.

      I'm still learning how to use brass. It certainly takes a bit more thought than plastic in terms of drilling and cutting. Doing just a little bit of metal working highlights how useful a small milling machine would be.
      This post was edited by Craig Townsend at June 20, 2017 7:55 PM EDT
    • June 22, 2017 4:14 PM EDT
      • Port Orchard, Washington
         
      • Posts
        1,693
      • Thanks
        60
      • Thanked
        79
      • Reputation
        Well Respected

      So I was able to salvage one of the brass parts by soldering in a replacement rod, and redrilling the hole, but I ended up tossing the piece because when I went to solder in a hinge, the combination of solder, my lack of soldering skills, and my lack of drilling skills made the whole thing into a giant mess of solder.

      I'm trying to solder and build a small hinge piece for my snow plow, and this is my first attempt at using my resistance soldering set up. Definitely a learning curve for soldering like this. And I think it will also help now that I have a foot petal switch too.

      Thanks for the tips about drilling. I went out and bought my self a set of center drills.
    • June 22, 2017 6:05 PM EDT
      • Burbank, CA
         
      • Posts
        1,048
      • Thanks
        23
      • Thanked
        69
      • Reputation
        Well Respected

      Craig Townsend said:
      Thanks for the tips about drilling. I went out and bought my self a set of center drills.
      Nice step forward. The proper tools always increase our skills and success.

       

    • June 22, 2017 6:13 PM EDT
      • Port Orchard, Washington
         
      • Posts
        1,693
      • Thanks
        60
      • Thanked
        79
      • Reputation
        Well Respected

      Thanks Gary for all the tips here and in your build logs. My wish list is growing of tools to find, including a center drill finder, and a larger x/y table for my bigger drill press. I can see why the tooling ends up costing more than the machines!
    • August 30, 2017 8:36 PM EDT
      • Shawn carries, A Pruse 02B12,
         
      • Posts
        11,574
      • Thanks
        458
      • Thanked
        355
      • Reputation
        Well Respected

      Greg Elmassian said:

      Would think a sharp drill would not wander so much.

      Greg

      Were drilling Brass here Greg so I guessing you have never dated a Colonels daughter?

    • August 30, 2017 11:12 PM EDT
      • Southern Oregon
         
      • Posts
        1,225
      • Thanks
        3
      • Thanked
        99
      • Reputation
        Well Respected

      " Rooster " said:
      Greg Elmassian said:

      Would think a sharp drill would not wander so much.

      Greg

      Were drilling Brass here Greg so I guessing you have never dated a Colonels daughter?

      Damn Rooster, I spit half my beer out through my nose reading that

    • August 31, 2017 1:56 AM EDT
      • Carlsbad, CA
         
      • Posts
        6,166
      • Thanks
        77
      • Thanked
        272
      • Reputation
        Respected

      Better than dating the Colonel himself!

      ____________________________________

      Be sure­ to visit ­my site, l­ots of tec­hnical tip­s and modi­fications,­ and you c­an search ­for topics­ and key w­ords.


      ­Click HERE for Greg­'s web sit­e
      PLEASE NOT­E: Please do NOT use private messaging, i­f you have­ a questio­n, feel fr­ee to emai­l me priva­tely, u­se regular­ email onl­y: greg@el­massian.co­m

    • November 18, 2017 9:24 PM EST
      • Farmington, New Mexico
         
      • Posts
        2,123
      • Thanks
        18
      • Thanked
        144
      • Reputation
        Well Respected

      As a young PFC,  I got pulled over outside Ft. Monmouth NJ in a Military Sedan with just me and a Visiting Generals daughter.  They called the General to verify her ID, and then my CO to verify why I was driving a Military sedan in Civies!  And then the MPs showed up.  She stepped in and showed her ID and dropped the Generals name and 3 Stars on them.  Things changed in a hurry.  She wanted to take a moonlight walk on the beach, and every one said to go for it.  We drove to Sandy Hook, and , and, and ...... When we got back to base the guards were waiting for us.  Along with the OD and we had an escort to the Visiting Officers Quarters.   The next morning, my CO, had a stern talk about protocol,  and then sent me out again, with the Generals daughter for the day (she had requested me again ), on escort duty.  She wanted to go to the Board Walk on Cony Island. Daddy had provided us with $50 for the day.  Some days in the army were better then others... 

      ____________________________________

      New Mexico­ Northern ­Railroad
      D&RGW ­315 Crew ­member, Fireman
      RRR #4
      Board Memb­er, Durang­o Railroad­ Historica­l Society

Forums Modeling Tools and Tips

    Icon Legend

  • Topic has replies
    Hot topic
    Topic unread
    Topic doesn't have any replies
    Closed topic
    BBCode  is enabled
    HTML  is enabled

Add Reputation

Do you want to add reputation for this user by this post?

or cancel

Ads by Google