Willamette Valley Rocks

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Small Sphere Machine

Covington Small Sphere Machine 382ssm


  • Dual 1/21 HP Motors
  • Automatic Grit Application
  • Spring Loaded Cutting Heads
  • Cutting Angle Adjustment
  • Powder Coated Aluminum Castings
  • Complete with Cutting Cups

The Small Sphere Machine makes spheres from 1/4" to 1" in size. Used for precision, this unit will take your work piece from a rough round shape to a perfect polished sphere. The downward slant of the cutter cups and shafts run the sphere in a continuous bath of grit eliminating the need to constantly dab grit on with a brush, and causing the grit slurry to run away from the bearings. The angle of the cuting cups can be increased as the rough corners of the sphere grind off, while a spring loaded head makes continuous adjustment unnecessary.

Unit comes complete with one (1) grit pan, instructions, product guarantee, and one pair of 1/4", 3/8", 5/8", and 7/8" cutter cups. This unit is an excellent choice for restoring marbles to original condition.


Model #382ssm -      Shipping Weight 26 lbs by FedEx             $545.00


Two Speed Bead Mill

Covington Two Speed Bead Mill 1040bm


  • 1/3 HP Motor
  • Small Portable Size
  • Mounted in a Heavy Gauge Powder Coated Steel Housing
  • Grinds up to Twenty (20) 1/2" Beads at a Time
  • Runs at Two Speeds, 380RPM & 250RPM

The Bead Mill makes beads from 5/16" to 3/4" in diameter. The 4-1/2" x 1/2" aluminum head has a 3/8" recessed ring in the ceiling which provides a trough for the beads to follow. Milling action is achieved by rotating the chamber while the head controls the beads location. The chamber head removes quickly for easy cleaning. This machine is best suited for producing beads from hard materials such as agate, jasper, and jade.

*Please note that the Bead Mill is NOT recommended for gemstone material softer than a 5 on the Mohs Scale as this machine is very aggressive.

The Two Speed Bead Mill operates at 380rpm and 250rpm. The faster speed is best suited for finishing beads after an initial grind. The slower speed reduces the abrasive action and should be used when milling softer materials such as malachite, rhodochrosite, and turquoise. These materials require light head pressure and finer abrasive grit. This unit comes complete with instructions and product guarantee.


Model #1040bm -      Shipping Weight 75 lbs by FedEx             $898.00


Single Speed Bead Mill

Covington Single Speed Bead Mill 1039bm


  • 1/3 HP Motor
  • Small Portable Size
  • Mounted in a Heavy Gauge Powder Coated Steel Housing
  • Grinds up to Twenty (20) 1/2" Beads at a Time
  • Runs at 380RPM

The Bead Mill makes beads from 5/16" to 3/4" in diameter. The 4-1/2" x 1/2" aluminum head has a 3/8" recessed ring in the ceiling which provides a trough for the beads to follow. Milling action is achieved by rotating the chamber while the head controls the beads location. The chamber head removes quickly for easy cleaning. This machine is best suited for producing beads from hard materials such as agate, jasper, and jade.

*Please note that the Bead Mill is NOT recommended for gemstone material softer than a 5 on the Mohs Scale as this machine is very aggressive.


Model #1039bm -      Shipping Weight 75 lbs by FedEx             $735.00


Sphere Machines Listed Below Do Not Ship Free - Call For Shipping Quote - 541-954-0039

Three Headed Sphere Machine

Covington Three Headed Large Sphere Machine 383tsm


Freight Item! Will Ship by Common Freight Carrier!

  • Three 1/6 HP, Heavy Duty Gear Motors
  • 161 RPM with 60 in-lbs of Torque
  • Each Motor is Independently Mounted on a Swivel Base
  • Stands 36" High with Water Tower & Grit Feed
  • Heavy Steel Frame & Guides Provide Years of Use
  • Complete with Cutting Cups
  • This item Ships by Common Freight Carrier

Covington's Three Headed Sphere Machine is capable of making spheres ranging from 2-1/2" to 10" in size. The water supply and grit dispenser are mounted so the sphere can run constantly with a fresh supply of grit and water.

All three heads are spring loaded, work independently from one another, and can quickly be adjusted with large spin handles. Unit comes complete with one (1) grit catch pan, instructions, product guarantee, and choice of one set of three (3) cast iron cutter cups.

*Please state cup size when ordering. Cup sizes available: 1", 1 3/8", 2 3/8", 3 3/8" and 4 3/8".


Model #383tsm -      Shipping Weight 255 lbs by Freight Carrier             $2,723.00


Large Sphere Machine

Covington Large Sphere Machine 381lsm


Freight Item! Will Ship by Common Freight Carrier!

  • Dual 1/3 HP Motors
  • Automatic Grit Application With Slurry Bowl
  • Spring Loaded Cutting Heads
  • Cutting Angle Adjustment
  • Shielded Arbor Shafts & Bearings
  • Large Powder Coated Metal Cabinet with Shelf
  • Complete with Cutting Cups
  • This item Ships by Common Freight Carrier

The Large Sphere Machine makes spheres ranging from 1-1/4" to 9" in size. The downward slant of the shafts run the sphere in a bath of grit, eliminating the need to constsntly dab grit on with a brush, and causing the grit slurry to run away from the bearings. The angle of the cutting cups can be increased as the rough corners of the sphere grind off. Both heads are spring loaded, so continuous adjustment is unnecessary.

This unit comes complete with two (2) 8" x 1/4" x 1" spiral polishing buffs, two (2) grit pans, instructions, product guarantee, and choice of one pair (2) of cutter cups.

*Please state cup size when ordering. Cup sizes available: 1", 1 3/8", 2 3/8", 3 3/8" and 4 3/8".


Model #381lsm -      Shipping Weight 250 lbs by Freight Carrier             $1,821.00