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Clausing 8520 Milling Machine
Mods and use of the machine
Album by chris case. Photos by chris case. 1 - 12 of 12 Total. 127 Visits.
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Riser for adding 4" of height to machine. Top view showing "shelfs" along sides, needed to support the clamp plate that keeps the turret head from turning.

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Bottom view of riser, 4" tall. made from 6x6x.188 square tube. Bolt pattern is 5" OC l/r, 5 1/8 fore and aft. Maybe 1/4" wall would work?

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Partially assembled.

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View shows that clamp plate.

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Power Feed using wheel chair motor. Notice the lever to our right, that engages/disengages an internal freewheel system.

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Pully and belt on screw shaft. You can see the mod to the housing- ID bored out for pully, and lower edges milled away for belt room.

Screw thrust is handled by the left end, so there is more room for mods to the right end.


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Micro swithch mounted to wheel chair motor. Actuated by a roll pin through engage/disengage shaft.

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Switch cover milled out of 1" thick UHMWP. Lever to disengage motor is shown in 'engaged' position. I plan on replacing the lever with a bright knob.

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Finito. Enclosure on pedestal is for the ac -> DC power supply. Hand cut louvers

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Oops, I forgot to leave tabs to screw the cover onto the swithc/PWD enclosure, so black tape will do for now.

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Speed knob, L/Right switch, and on/off for the AC line incoming.

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Final operating speeds are from about 1 inch per minute to 10 ipm for rapid traverse, controlled with the speed knob.

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