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Clausing 8520 Vertical Knee Mill — 110V — 5.625" Riser — Duluth - $3,250 (Duluth)
condition:
excellent
make / manufacturer:
Clausing
model name / number:
8520
size / dimensions:
70x40x36"
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Compact American-made vertical knee mill. Excellent alternative to a full-size Bridgeport for smaller shops, basements, and garages.
S/N 545. Early production, believed late 1950s.
110V / single phase.
SPINDLE NOSE - MT2
DRAW BAR - 3/8-16 UNC
SPINDLE SPEEDS (RPM):
180, show contact info , 1900, 3250
TABLE SIZE - 6" x 24"
TRAVEL:
X — 15"
Y — 5"
Z / Knee — 11.375" (Hand crank included, or use an 18mm 12-pt socket w/ drill for powered knee adjustment)
Quill — 3" (Rapid-Feed Lever + Fine-Feed Handwheel)
SPINDLE TO TABLE:
OE standard machine: 0" - 11.625"
This machine (w/ 5.625" Riser): 2.5" - 17.375"
SPINDLE TO COLUMN = 2.125"-8.5"
T-SLOTS:
Top of Table = 9/16"
Front of Table = 1/4"
RUNOUT / BACKLASH:
~.001" spindle runout
~.025" X/Y backlash
INCLUDED:
-OE Clausing cabinet/stand
-Custom 5.625" turret/head riser
-Full MT2 collet set
-MT2 drill chuck (~1/16–5/8")
-MT2 slitting saw arbor
-MT2 TCMT insert fly cutter
-MT2 to MT1 Adapter
-OE 3" Atlas M1-300 swivel vise
-Cool Vintage #270 brass asset tag
-Assorted HSS Endmills
5.625" RISER: Most significant upgrade to this machine. Increases max spindle-to-table clearance from 11.625" OE to 17.375" measured. Substantially more room for taller work, tooling, boring and rotary setups.
3" Atlas M1-300 swivel vise is functional tho visibly rough. Previous rookie drilling was repaired where practical — included.
This is a fine, compact American-made knee mill that breaks down easily into manageable assemblies for transport/reassembly. Excellent for basements, garages or any small-shop / hobby setup.
$3,250
OPTIONAL:
6" rotary table + 8" 3-jaw chuck w/ backing plate, as pictured — $400
Palmgren 4" milling/swivel vise, as pictured — $300
On-site inspection/demonstration available. Local pickup only (55806). See less