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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 |
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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 |
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| All the Parts |
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| Mounting Plate |
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Note:
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.
| Shaft and Bearings |
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| Bearing Housing |
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| Bearing Cups |
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| Housing was made from scrap aluminum |
| Rear Bearing |
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| Shaft with preload adjustment |
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Click here for link to 4th Axis CNC Indexer Timing Pulley Maker software.
4th Axis CNC Indexer Setups
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