I decided to stay with my 495 holding torque stepper motor and timing pulley ratio and add
the Taig lathe chuck to fit the 3/4" ER32 collet. This way I can remove the Chuck and use the ER32 collets.
The pictures will show the Newer 4th axis setup.
The ER32 fit the 3/4" ID bearings, just a nice slip fit.
Need to make a Swarf/ Dust Cover
Added a spring loaded block to clamp the ER32 for the wrench.
Also added a chip/swarf plastic cover.
Motor fits in a milled pocket
Small Ball Bearing added for Backlash takeout.
May add another bearing below.
I seen this gearbox used a while back. Thought i give it try, only cost around $17.00. So far it looks like its got a
lot of power. Drawback is, it only has 18 to 1 ratio. I'm waiting on a ER32 arbor to replace the spindle. This was a
good idea except I didn't like the motor.
4th Axis with 495 oz-in holding power stepper motor,
30T Timing Pulley and 15T Motor pulley.
With Bearing Preload adjustment.
Rear View Click to Enlarge pictures
All the Parts
Shaft inprovement, would be to machine the Shaft with 3/4-16 NF threads on both ends. Then the hole thru the Shaft could
be used for long small stock. The other end would fit a 3/4-16 threaded Chuck.
These bearings are 3/4" Timken wheel axle bearings.