Harbor Freight Mirco Mill Drill COnversion

[dan_the_welder]

Hi Everyone,

Just finished the motor mounts on a Harbor Freight/Central Machinery Micro Mill Drill.

It's not fancy, but will get the job done.

The little blue thing on the leadscrews is a thrust bearing from McMaster with a couple of belville washers, or disc springs, to keep the backlash out. One on the front and one on the back. You have to compress the springs and use the coupling to hold the tension.

The leadscrew shafts are 8 mm but a 5/16 lovejoy coupler slides on perfectly. I had intended to bore them, but it was unnessicary.

There is not enough machined shaft for the two thrust bearings, belville washers and coupler. Rather than machine the lead screw and lose some table travel, I bored out the back of the mount and nestled the bearing in there on both the X and Y. The Z got machined a little bit to get some extra shaft length.

I discovered my steppers did not have enough torque to lift the head so I made the step down gear train out of threading gears from my old mini lathe. I machined the hubs for the gears from some aluminum bar stock. They are pressed , keyed and loctited on.

Should be cool, we are going to machine some circuit boards with this mill.

Dan

P.S. If you want to see my 4 by 8 router it is here http://www.cnczone.com/forums/showthread.php?t=37510

[Mtncrzr]

Awesome! I am getting an x1 clone today and will convert too.

[dan_the_welder]

Took it over to it's new home this evening and were able to move an axis at a time.

Silly but seeing the machine move for the first time is always a real thrill.

Dan

[MIKE JEFFERS]

those steppers look small
is that an rs250 or a 125 i see must be rare in the us
bit of a 2t nut meself

mike

[dan_the_welder]

Hey Mike,

You have sharp eyes. That bike right there is an RS50 replica, which fell into my hands without a motor.

Arriving soon is a 70's CB125 which will provide the motor and one of these, thus creating the CB125RS Turbo.

Heh, should be sick.


My first custom bike is below, homemade rigid frame, Suzuki 400cc motor and the wheels and fork off of a EX500 Ninja. Christened "Half a Harley"

Dan

[project5k]

oh i do like that tiny turbo... wonder if i could use something like that on my toy....

[dan_the_welder]

Hey Man,

That is a wild ride. Is it from a kit or did you make it from scratch. I love the VW lines.


Dan