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Welding Positioner

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jbolt

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#1
I blame RayC for planting the seed in my head to build a positioner. See his post https://www.hobby-machinist.com/threads/welding-rotary-table.64640/

I have another project that has a lot of round bits to weld so it made sense to make one. This is my slightly more complicated re-mix of Rays concept.


The table is 6" x .5" steel. Slots are sized for a 1/4" nut across the flats. No need to make special nuts. Slots were machined on the CNC mill. I had to get creative on holding a 6" disc in a 4" vise.

20180428_113209.png 20180428_113815.png


Main shaft, bearing block, taper roller bearing and retainer/ground commutator.

20180428_114415.png


Main shaft is pressed into the table. No welds.

20180428_120106.png


The base is made from 11 ga. steel sheet. I had my local supplier cut them to size for me. Cost me $13 out the door. 12v power supply and speed control are mounted to 1" x 1/8" flat and then to threaded stand-offs welded to the underside of the base top. There is a anti-rotation bracket attached to the motor gearbox with a slot that engages a 1/4" dowel pin which is pressed into the bearing block. A set screw secures the gearbox shaft to the main shaft. The motor/gearbox are only supported by the shaft.

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The stand is made from 1" square tube and 3/8" x 2" steel flat. The table can be set from 0 - 90 degrees in 15 degree increments.

20180430_161752.png


Adapter for a 5" 3-jaw chuck

20180502_204332.png


Painted, wired up and ready to go. I did the table ground a little different than RayC. I used 3 strands of 1/4" copper ground strap which wraps around the shaft retainer and is tensioned with a spring. There is a ground lug for the welder ground clamp on the bottom strip that holds the power cable gland and the 2-pin foot switch connector. I also added an adjustable hand support system.

20180515_165319.png 20180515_173029.png 20180515_173037.png 20180515_173058.png 20180515_173859.png 20180515_173916.png 20180515_174102.png
 

vocatexas

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#2
NICE WORK! I like it!
 

Ray C

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#3
Man, I wish I had one like that!

Very nice!
 

BROCKWOOD

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#4
Very inspiring!
 

RandyM

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#5
:cheer::cheer::cheer:

Very professional.
 
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#6
Super clean work
 

brino

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#7
Fantastic Build!

Thanks for sharing this.
-brino
 

Billh51

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#8
Well thought out and nicely executed. Fantastic build, congrats.
 

Silverbullet

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#9
Nice build. Looks good and a clean set up .
 

zmotorsports

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#10
Very nicely done.

You'll love having a welding positioner.

Mike
 

Downunder Bob

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#12
Very nice, I know my circular welds would be neater if I had one, but at this stage I can't justify the time.
 

FOMOGO

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#14
Great job, will be a real asset in the shop. Mike
 

NCjeeper

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#15
Well done.
 
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