Sphere Machines and Bead Mills
Covington Bead Mills
Covington Bead Mills do not produce perfectly round beads, but they do make excellent nuggets and freeform shapes. The closer one preforms the material before using the bead mill, the closer the finished product will be to your desired shape.
Covington Bead Mills make beads from 5/16" to 3/4"
in diameter. The amazing machine will accommodate up to twenty 1/2" beads
at a time. Polishing must be accomplished in a tumbler. We suggest a vibratory
style tumbler. You can check out vibratory tumblers on our Tumblingmachines.com
website.
Rough material must be cubed slightly larger than
the finished size before inserting into the Covington Bead Mill. Silicon Carbide
grits are used to shape the rough into round shapes. Different types of material
requires different grits, milling times, etc. So, a bit of experimenting is necessary
to get uniform results.
Model 1039 is a single speed machine and
Model 1040 has two speeds (250 RPM and 380 RPM). The single speed on the Model
1039 does not allow proper preforming of material softer than Moh's 5. The slower
speed of the Model 1040 allows better control for preforming soft material and
for finer grits on hard material.
 |
The aluminum milling head (circular piece on top) is held down with the straight bar (in back) and two weights shown in front. The workpieces are then ground/rotated between the milling head and rotating bead chamber. |
Covington
Model 1039 and Model 1040 Bead Mills |
Item |
List Price
| Our
Price |
Model 1039
Single Speed Bead Mill |
$950.00
|
$775.00
|
Model 1040 Two Speed Bead Mill |
$1100.00
|
$895.00
|
BC1039 Extra 5" Aluminum Bead Chamber |
$175.00
|
$157.00
|
MH1039 Extra 5" Aluminum Milling Head |
$45.00
|
$40.50
|
Covington Model 382 Small Sphere Machine
Closeup of cutting cups with marble. |
Even though this is called the "Small
Sphere Machine", this is a heavy duty piece of equipment.
It makes spheres from 1/4" to 1" (6.3mm to 25.4mm) in
diameter. The Covington Little Sphere Machine has the following
features:
- 1/18
HP motor
- 2 Heads
- Automatic Grit Application
- Spring Loaded Heads (so constant adjustment is not needed)
-
Ajustable Cutting Angle
- Grit Pan
- Instructions
- Set of 1/4", 3/8", 5/8" and 7/8" cups
|
Covington
Model 382 Small Sphere Machine
|
Item
|
List Price
|
Our
Price |
Model 382 Small Sphere Machine |
$650.00
|
$565.00
|
Extra
Cutting Cups for Model 382 Small Sphere Machine
|
Item
|
Our
Price |
SSM001 Pair of 1/4" Cups |
$5.00/pair |
SSM002 Pair of 3/8" Cups |
$5.50/pair |
SSM003 Pair of 5/8" Cups |
$6.00/pair |
SSM004 Pair of 7/8" Cups |
$6.50/pair |
SSM005 Pair of Each Size Cups (1/4, 3/8, 5/8 & 7/8") |
$20.50/pair |
Covington Model 381 Large
Sphere Machine
 |
This is a industrial
grade machine for producing large spheres. It makes spheres from 1-1/4" to
9" in diameter. The Covington Large Sphere Machine has the following features:
- 1/3 HP motor
- 2 Heads
- Automatic
Grit application with slurry bowl
- Shielding for Arbor and Bearings
- Metal
Cabinet with Shelf
- Spring Loaded Heads (so constant adjustment is
not needed)
- Ajustable Cutting Angle
- 2 Grit Pans
- Instructions
- Choice of size of one pairCutting Cups.
Please
include Cup Size when ordering.
- 2 Polishing Buffs.
|
Covington
Model 381 Large Sphere Machine |
Item
|
List Price
| Our
Price |
Model 381
Large Sphere Machine |
$2,300.00
|
$1,919.00
|
Extra
Cutting Cups for Model 381 Large Sphere Machine |
Item
|
List Price
|
Our
Price |
LSM201 Pair of 1"
Cutting Cups for spheres from 1-1/4" to 2" |
$24.00/pair
|
$21.60/pair
|
LSM202 Pair of 1-3/8" Cutting Cups for spheres
from 2" to 3" |
$28.00/pair
|
$25.95/pair |
LSM203 Pair of 2-3/8" Cutting Cups for spheres
from 3" to 5" |
$34.00/pair
|
$30.95/pair |
LSM204 Pair of 3-3/8" Cutting Cups for spheres
from 5" to 7" |
$46.00/pair
|
$42.95/pair |
LSM205 Pair of 4-3/8" Cutting Cups for spheres
from 7" to 9" |
$56.00/pair
|
$51.95/pair |
PTS381 Set of two Shaft Adapters to use 3/4" Standard Pipe Reducers |
$42.50/pair
|
$38.25/pair
|
Covington
Model 383 Three Headed Sphere Machine
 |
Covington's Model
383 Three Headed Sphere Machine is easy to use. The three head system grinds faster
than a standard two head configuration. It makes spheres from 2-1/2" to 10"
in diameter. The Covington Three Headed Sphere Machine has the following features:
- 1/6 HP motor
- 3 Heads
- Automatic
Grit Application
- Spring Loaded Heads (so constant adjustment is
not needed)
- Easy-to-Use Handles for Quick Ajustments
-
Grit Pan
- Choice of size of 3 Cutting Cups. Please
include Cup Size when ordering.
- Instructions
- Heavy Duty Steel Frame
|
Covington
Three Headed Sphere Machine |
Item
| List Price |
Our Price |
Model 383 Three Headed Sphere Machine |
$3,300.00
|
$2,799.00
|
Extra
Cutting Cups for Model 383 Three Headed Sphere Machine |
Item |
List Price
|
Our Price |
LSM301 Set of three 1" Cutting Cups for spheres
from 1-1/4" to 2" |
$33.00/three
|
$30.95/three |
LSM302 Set of three 1-3/8" Cutting Cups for spheres
from 2" to 3" |
$40.50/three
|
$38.95/three |
LSM303 Set of three 2-3/8" Cutting Cups for spheres
from 3" to 5" |
$49.50/three
|
$46.95/three |
LSM304 Set of three 3-3/8" Cutting Cups for spheres
from 5" to 7" |
$67.50/three
|
$62.95/three |
LSM305 Set of three 4-3/8" Cutting Cups for spheres
from 7" to 9" |
$81.00/three
|
$77.95/three |
PTA383 Set of three Shaft Adapters to use 3/4" Standard Pipe Reducers |
$52.50/three
|
$49.00/three |
4" Diamond
Cutting Cups (come with 3/4" National Pipe Thread)
To adapt these Diamond Cutting Cups to Covington sphere machines use the PTA383 shaft adatpters for the Model 383 sphere machine and PTS381 shaft adapters for the Model 381 sphere machine. (Listed above.)
|
Item |
List Price
|
Our Price
|
DC4405 40/50 Grit SINTERED 4" Cutting Cups |
$125.00 each
|
$115.00/each
|
DC4112 100/120 Grit SINTERED 4" Cutting Cups |
$125.00 each
|
$115.00/each
|
DC4182 180/200 Grit SINTERED 4" Cutting Cups |
$125.00 each
|
$115.00/each
|
DC4100 100 Grit RESIN BOND 4" Cutting Cups |
$60.00/each
|
$55.00/each
|
DC4220 220 Grit RESIN BOND 4" Cutting Cups |
$60.00/each
|
$55.00/each
|
DC4320 320 Grit RESIN BOND 4" Cutting Cups |
$60.00/each
|
$55.00/each
|
DC4600 600 Grit RESIN BOND 4" Cutting Cups |
$60.00/each
|
$55.00/each
|
DC4120 1200 Grit RESIN BOND 4" Cutting Cups |
$60.00/each
|
$55.00/each
|
4-Step Grit Kit
This kit provides all the grit
and polishing powder needed to produce a fine polish on
most slabs and geodes.
Our kit includes one pound
of each:
- 60/90 Coarse Silicon Carbide Grit
- 120/200 Medium-Coarse
Silicon Carbide Grit
- 400 & Finer Medium Silicon Carbide Grit
- .75 lbs of Old Miser Prepolish Fine Silicon Carbide Grit
- Covington Tumbler Polish
4-Step Grit Kit
|
Item | Price |
60/90, 120/200, 400, Old Miser Prepolish, Tumbler Polish
|
$27.00
|
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