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  • drawbar hammer really simple

    After reading Boot's post about z axis height on the mini mill I decided to check mine. Since I'm still unemployed I haven't picked up any holders or endmills and have just been using the mill as a drill press. I knocked loose the chuck with a piece of wood and figured I needed an actual hammer so I looked through the metal I have, thanks to David h, and found a rod of brass and a tube of brass.
    I turned down the rod to fit the tube and used the remainder of the rod for a partial handle. I planned to solder the rod into the tube but the fit was tight enough that I had to drive it in with a 5pd sledge. I tried to solder it but using white flux and plumbing solder had no effect, the solder just balled and slid off the brass. Is there a special flux or solder for brass?
    I took a picture of the drawbar hammer, note the skull crusher end because anything with a skull crusher is just better. No split in the handle just wood grain.



    Jim Doherty

    Comment


    • Jim, 98% of the time when solder balls up rather than flowing, you've got the workpiece too hot. Lead-tin and tin-silver solders generally melt & flow at around 450 to 600 F, depending on the alloy composition. I prefer to use paste flux such as NoKorrode for soft solders.

      David
      David Kaiser
      “You can have peace. Or you can have freedom. Don't ever count on having both at once.”
      ― Robert A. Heinlein

      Comment


      • Originally posted by 38_Cal
        Jim, 98% of the time when solder balls up rather than flowing, you've got the workpiece too hot. Lead-tin and tin-silver solders generally melt & flow at around 450 to 600 F, depending on the alloy composition. I prefer to use paste flux such as NoKorrode for soft solders.

        David
        David,

        I was going to say the workpiece is probably not hot enough.

        Usually if the workpiece is too hot, the filler will boil and roll off.

        Unless a torch is being used, I doubt that too much heat is the problem.

        Brian
        OPEN EYES, OPEN EARS, OPEN MIND

        THINK HARDER

        BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

        MY NAME IS BRIAN AND I AM A TOOLOHOLIC

        Comment


        • Originally posted by 38_Cal
          Jim, 98% of the time when solder balls up rather than flowing, you've got the workpiece too hot. Lead-tin and tin-silver solders generally melt & flow at around 450 to 600 F, depending on the alloy composition. I prefer to use paste flux such as NoKorrode for soft solders.

          David
          I was going to say not hot enough as well, especially given the mass of the head. You were probably melting the solder with the flame and it wasn't flowing because the part was too cold.
          Stuart de Haro

          Comment


          • Originally posted by Tel
            Tailstock turret for the Myford



            .. with tooling


            Very nice tailstock turret. Did you use plans from somewhere or create on your own? I would like to make one someday and this certainly is inspiring.

            Comment


            • It's a sort of composite of a few different plans I looked at Dale. Remarkably easy to do an accurate job once you realise that the turret is self aligning for the purpose of cutting the tool sockets.
              Tel

              Comment


              • http://www.youtube.com/watch?v=8aAOQAGsV38
                here is a video of a Bead Roller I just finished.
                have fun
                Tom

                Comment


                • Home made belt grinder/deburr...er....made out of a harbor freight engine stand that I didn't trust to hold up a big block. Btw...the Chinese put the weld seam in a corner on their square tubing....so don't use it for anything that matters.

                  Uses 1x30" belts, top pulley is a timing belt tensioner bearing from a Toyota camry, motor is. 1750rpm 1/4 HP drill press motor....I'd like itfaster but it gets the job done.

                  Comment


                  • what did you do to keep it tracking right ? did you crown the pulleys?

                    Comment


                    • First one is a Fuel Injector test bench we use when matching injectors for our drag truck. The lower section (copper) holds the injector. We clamp it in place. Fill the tank with fuel and pressurize it to our desired pressure (110psi).

                      We hook up a 12v power supply through a precision timer (omron) and spray into a coke bottle. Then measure the volume etc etc.



                      The next "tool" is more of a re-purpose of a common tool. We had a small vacuum sitting around. I mounted it above my bench. its easy to flick on and off to clean up the bench. The vac bags are cheap like dirt and last quite a while.




                      The last some of you have seen, it is my on the cheap power draw bar. Have a video of it (easier than explaining what I did.)

                      http://www.youtube.com/watch?v=G0VK3lQwLwc

                      Comment


                      • Originally posted by jack3140
                        what did you do to keep it tracking right ? did you crown the pulleys?
                        Yes, the bottom pulley is barrel shaped

                        Comment


                        • Originally posted by lbhsbz
                          Yes, the bottom pulley is barrel shaped
                          thanks i plan to build one very handy tool to have

                          Comment


                          • Originally posted by zerodegreec
                            First one is a Fuel Injector test bench we use when matching injectors for our drag truck. The lower section (copper) holds the injector. We clamp it in place. Fill the tank with fuel and pressurize it to our desired pressure (110psi).

                            We hook up a 12v power supply through a precision timer (omron) and spray into a coke bottle. Then measure the volume etc etc.


                            ]
                            If you wanted you could send me your nozzles and I would flow them on my fuel flow bench for a nominal charge. PPH or GPH you pick.
                            "the ocean is the ultimate solution"

                            Comment


                            • Fuel Tester:

                              I love it. Simple and quick, and gets the job done.

                              TIP: Mineral Spirits.... much higher flash point, specific gravity is very close to gas that you get decent results. I'll also mix with injector cleaner for a cleaning cycle.

                              Here in Texas, too darn hot during summer testing. I'll look at spray pattern into a graduated cylinder first, then use aluminum foil to wrapped around the base of the injector and top of the graduated cylinder to eliminate evaporation differences. Also worth while to check at different pressures, and different voltages on the injectors.

                              Comment


                              • Originally posted by roundrocktom
                                Fuel Tester:

                                I love it. Simple and quick, and gets the job done.

                                TIP: Mineral Spirits.... much higher flash point, specific gravity is very close to gas that you get decent results. I'll also mix with injector cleaner for a cleaning cycle.

                                Here in Texas, too darn hot during summer testing. I'll look at spray pattern into a graduated cylinder first, then use aluminum foil to wrapped around the base of the injector and top of the graduated cylinder to eliminate evaporation differences. Also worth while to check at different pressures, and different voltages on the injectors.

                                Thanks for the tip. We will give it a try next time. Last time we tested the injectors it was below 0. So we had my shop door closed. That lasted about 20min and it got really bad. We ended up pushing my rolling bench outside and finishing off.

                                We do test at different pressures but have not tried the variable voltages, but now that you mention it, it makes since. We dont find the amount of evaporation a real concern. We do put a cover over the bottle so that it does not spray everywhere.

                                Its amazing how much deviation you get between the injectors. Its not a concern for regular street engines, but when your pushing 800+HP you don't have allot of fudge room.

                                Comment

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