Heavy 10 5C drawbar

[SLK001]

The three washers in the pic show where the 35mm ID thrust bearing will be, sandwiched between washers under the handwheel. I’m waiting for the thrust bearing to arrive but I think I only need one washer under the handwheel.

The surfaces for the thrust bearing need to be hardened, so you'll need both the inside and outside bearing washers.

For your handwheel, chuck it up and get the outside polished to a near mirror surface. Your hand will be making contact with it while it is spinning and you don't want the wheel to "catch" on anything. Also, having spokes on your handwheel could catch a finger, so keep that in mind.

 

[tk1971]

The surfaces for the thrust bearing need to be hardened, so you'll need both the inside and outside bearing washers.

For your handwheel, chuck it up and get the outside polished to a near mirror surface. Your hand will be making contact with it while it is spinning and you don't want the wheel to "catch" on anything. Also, having spokes on your handwheel could catch a finger, so keep that in mind.

The thrust bearing will come with the matching washers, so I may not need those 7/8” ID washers. I’ll polish the wheel, thanks for the tip. I’m also contemplating threading the outside of the wheel hub and screwing it into the tube.

 

[SLK001]

I’m also contemplating threading the outside of the wheel hub and screwing it into the tube.

Don't screw it in - it will see significant rotational force in both directions. Bore the hub to be a tight sliding fit, then pin it in place.

 

[tk1971]

Some progress pics…













I used the Telescopic Taper Attachment for the first time and it was a pleasure to use.

 

[SLK001]

Instead of turning your cone down to a knife edge, take some off the tube. This will also give you a nice shoulder to slide the tube up to.

 

[tk1971]

Continuing to work on this.

I finished the interface to the rear of the spindle. I found out that I suck a little less at parting today.

Was able to at least place the pieces (draw tube, collet, cone, thrust bearing and the piece that was parted from the cone) on the lathe to get a feel of how things will come together. 12 full turns of the draw tube tightens the collet completely.

Still haven’t decided on how to attach the hand wheel since the hub has a smaller diameter than the tube. Exploring my options.

Once I figure out how to attach the hand wheel, I’ll measure and cut the tube.

Oh, and I figured out that the jaws on the 3-jaw chuck are not reversible (for some reason, I had hoped that it was), so I’ll be using the 4-jaw chuck for the hand wheel.

 

[twhite]

Looking really good.


Cutting oil is my blood.

 

[tk1971]

I’m done…

I turned the OD of the wheel hub to fit the ID of the tubing, then I drilled 2 holes and tapped then for 1/4”x20tpi set screws.

I finally got around to grinding down a HSS parting blade and used that to put the groove on the tube secure the cone piece. Once again, I used 1/4”x20tpi set screws.

After a final test fit, Lock Tite was applied and I’m all set.

Final pics:
















That was fun.