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Building Press, lots of holes to drill

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  • #16
    "Do not use a vertical mill as it may cause excessive wear on the mill quill."

    Respectfully disagree Oldtiff. But it is true that you won't wear out what you don't use. An annular needs far less thrust than any solid drill.

    Mr.Sleepy, Hougen used Rota-broach as a trade name...was there licensing from UK or did they buy it? Just curious.

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    • #17
      What do you plan on using for the ram. I eventually want to do the same so im curious how you are going about this build.

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      • #18
        Originally posted by Carm View Post
        Mr.Sleepy, Hougen used Rota-broach as a trade name...was there licensing from UK or did they buy it? Just curious.
        Hougen Manufacturing were the inventors and patent holders ... and Rotabroach is a trademark for them .. The UK Rotabroach is their UK arm set up in 1975 .

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        • #19
          I agree it sounds like a job for a drill press.
          Gary


          Appearance is Everything...

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          • #20
            "Do not use a vertical mill as it may cause excessive wear on the mill quill." OldTiffie

            Sorry Tiffie, but I must respectfully disagree with you on this one. A Bridgeport type mill is the best drill press ever. You have the workpiece firmly clamped and rigidly controlled and make the hole locations with great exactness. Drilling has a concentric axial force going straight up and down the spindle. No problems for the quill. End milling puts a heavy radial load on one side of the quill, yet the mills go for years doing that.

            I would suggest to the OP to do one hole with the end mill and one hole with the annular cutter at the beginning and see which you prefer to use. It will be an educational opportunity.
            Kansas City area

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            • #21
              I have done a lot of work with annular cutters. Be sure to use a cutting fluid. These cutters are expensive to sharpen, so do everything you can to keep them sharp.

              I have used them in a 3/4" end mill holder. They cut the holes fine but ejecting the slugs is tough. I agree with the suggestion to use a mag drill. However, if I were going to do that I'd tack your verticals in pairs and cut your holes through both at once so all of your holes line up.

              metalmagpie

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              • #22
                This thing eats!!



                I have about 50 brand new cutters for it. Didnt have it when I built my 50ton press. I used my el cheapo ryobi 14" drill press. Its the bench model. And a greenlee 1" hole saw. I only had to do 32 holes through 3/8" steel and the holesaw is still scary sharp. JR

                My old yahoo group. Bridgeport Mill Group

                https://groups.yahoo.com/neo/groups/...port_mill/info

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                • #23
                  If anyone does stack their material, be careful to stop and pull the slug after the first hole, or you will have problems.
                  The typical grind DOES NOT cut the inside through, it leaves a thin burr around the slug. This will spin preventing entry, and if you're asleep possibly breaking the cutter or stripping the rack.
                  Grinds can be had for stack cutting.

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                  • #24
                    Thanks for all the replies guys. I have a nice 15 inch Clausing Drill Press that I just restored but I am still going to use my new mill. I think the DRO will simplify things and keep things accurate. My new Acer doesn't have coolant yet and don't know if I will ever install it. I like the idea of Crisco inside the annular cutter but what cutting fluid would be best for this particular application? Ive built 2 presses in the last 25 years and have just drilled the holes in the past. I have always used 6" ID cylinders with a Williams pump with its own reservoir. They were a popular pump for hoists on straight truck boxes. I install a 1-1/2 horse motor and pulley it about 4 to1 and they have worked great and last forever. They put out between 3500 and 4000 psi and that easily computes to 50 ton. I like the power when I need it. Hate the cheap Harbor Freight presses I looked at but im sure they work fine for most garage applications. Plus I like to over build. thanks again Paul

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                    • #25
                      "...but what cutting fluid would be best for this particular application?"

                      Any soluble cutting oil. The portables (mag base) have a gravity fed canteen, I have used water in them. On a mill, usually dry (with Crisco) but not production pace.

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