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Jar Mills and Grinding Media |
Unitized jar mills, long jar mills, grinding mill jars, grinding media and a host of additional equipment to meet your milling, grinding and blending needs. |
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Unitized Jar Mills
U.S. Stoneware’s unitized jar mills are engineered for economy, compactness and mobility. Assured reliability results from all welded steel frames, powerful roller chain drives, and pillow blocks with cartridge-type permanently sealed ball bearings for efficient operation.
All jar mills are built with special no-creep roll design. One roll is convex, the other is concave. Jars stay centered, won’t work off rolls. No clamping or fastening of jar is required. Three-position adjustment securely mounts idler roll, yet it can be quickly changed to handle standard size 000 through No. 2 Roalox jars or other round containers 2" to 9" in diameter. Rolls are 2" in diameter and made of long-wearing, oil, solvent and chemical-resistant Neoprene rubber; they bleed off static electricity generated by rotating jars. Spare parts are available from stock.
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Model 755
- Motor is 1/3 HP, TEFC-DC, 115V / 60Hz single phase (220V / 50Hz also available, call for pricing)
- Options: Digital tach & timer (DC only), Roll guard cover automatically included with 755RMV
- Totally enclosed DC drive motors permit solid-state control of roll speed. Machines have speed range of between 20 and 300 RPM.
Models 764
- Totally enclosed DC drive motors permit solid-state control of roll speed. Machines have speed range of between 20 and 300 RPM.
- Motor is 1/4 HP, 115V / 60Hz single phase, (220V / 50Hz also available, call for pricing)
- Options: Digital tach & timer (Not available on Explosion Proof Models).
- Explosion-proof motors, roll guard (roll guard cover automatically included with 764AVM)
- 764AVM is a two-jar capaciy unit
Model 784
- Totally enclosed DC drive motors permit solid-state control of roll speed. Machines have speed range of between 20 and 300 RPM.
- Designed with sheet metal pans under each tier of rollers. Pans contain jar contents should spillage or breakage occur.
- Motors is 115V / 60Hz single phase, (220V / 50Hz also available, call for pricing)
- Options: Digital tach & timer (Not available on Explosion Proof Models).
- Explosion-proof motors
- 784AVM is a two-jar capacity unit
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The machines as shown do not comply with OSHA Regulation 1910-212 (a) (4), Barrels, Containers and Drums. It is the user’s responsibility to supply equipment as may be required by OSHA for a particular operation. |
Technical Data |
Model No. |
No. Tiers |
Max # Jars |
Overall Dims Motor |
Loading HP |
Approx. Max Wt. |
Shipping Wt. |
Length |
Width |
Height |
755RMV |
1 |
1 |
17-3/4 |
11-1/4 |
13-3/4 |
1/4 |
60 |
70 |
764AVM |
1 |
2 |
30-1/4 |
12-3/4 |
15-3/4 |
1/4 |
75 |
90 |
784AVM |
2 |
2 |
20-1/4 |
12-1/8 |
34-3/8 |
1/4 |
60 |
130 |
Long Roll Jar Mills
Grinding Mill Jars
These ceramic jar bodies have been formulated to provide about 4 times the wear rate of our competitors porcelain jars. Lower silica content cuts silica contamination by more than half. High-strength, impact-resistant composition minimizes chipping and breakage.
Model 774 Roalox Alumina-Fortified Grinding Jars
- Made of wear-resistant chemical porcelain fortified with alumina
- Positive lid locking bar and hand wheel for quick, easy opening and closing
- Precision ground cover and gasket seat assure leakproof fit
- Wide mouths for fast emptying, cleaning, loading
- Gaskets are oil, solvent and chemical-resistant Neoprene rubber
- Inside surfaces are unglazed
Model 773 High Alumina Grinding Jars
- Same design features as Roalox mill jars
- Ultra-high fired ceramic body composed primarily of high-grade aluminum oxide
- Extremely high abrasion resistance, long service life, negligible contamination factor
- Recommended where silica contamination must be held to an absolute minimum
- Polyurethane-coated body minimized breakage
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Technical Data |
Jar Size |
Jar Volume* |
Approx Outside Dims (inches) |
Approx. Net Wt. (lbs) |
Gallons |
Liters |
Diam. |
Jar Height |
Overall Ht. |
Mouth Opening |
774 High Roalox Alumina Grinding Jars |
000 |
0.1 |
0.3 |
3-3/8 |
4-3/8 |
5-1/2 |
1-1/4 |
1 |
00 |
0.3 |
1.0 |
5-1/2 |
5-1/2 |
6-3/4 |
2-3/4 |
5 |
0 |
0.5 |
1.8 |
5-7/8 |
7-1/4 |
8-3/4 |
2-3/4 |
7 |
1 |
1.5 |
5.6 |
8-7/8 |
8-1/2 |
11-1/2 |
5-1/4 |
21 |
2 |
2.2 |
8.3 |
10-3/8 |
9-1/2 |
12 |
5-1/4 |
23 |
3 |
3.3 |
12.4 |
12-3/8 |
10 |
13 |
8 |
35 |
6 |
6.6 |
25.0 |
14-5/8 |
13 |
15 |
8 |
55 |
773 High Alumina Grinding Jars |
00 |
0.3 |
1.0 |
6-3/8 |
5-3/8 |
7 |
3-11/16 |
5.5 |
1 |
1.5 |
5.6 |
9-1/2 |
8-1/2 |
12-1/4 |
7-1/8 |
23.0 |
*Volumes are ±10%
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Model 611 Unlined Stainless Steel Grinding Jars
- Stainless steel, with or without internal lifter bars
- Easy to use
- Fast cleaning
- Wide mouths
- Curved inside corners
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Model 612 Lined Steel Grinding Jars
- All sizes have quick-change snap-in liners. This feature is especially significant when varied materials are milled and cross contamination must be avoided
- Using a separate liner for each material protects the product, saves clean-up time, reduces number of jars required. Note: Cover liners are not snap-in; a different cover is needed for use with each liner
- Jars are carbon steel
- Buna-N,EPDM, Low-Ash rubber, Neoprene, and Polyurethane liners are available
- Model 612A (Low Ash), 612B (Buna-N), 612E (EPDM), 612N (Neoprene), 612P (Polyurethane) Lined Steel Grinding Jars (Specify Lining)
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Technical Data |
Jar Size |
Jar Volume* |
Approx Outside Dims (inches) |
Approx. Net Wt. (lbs) |
Gallons |
Liters |
Diam. |
Jar Height |
Overall Ht. |
Mouth Opening |
611 Unlined Stainless Steel Grinding Jars |
00 |
0.3 |
1.0 |
6-1/4 |
4-1/4 |
6-1/2 |
3-1/2 |
7 |
2 |
2.3 |
8.7 |
10-1/4 |
7-1/4 |
10-1/4 |
6-1/2 |
13 |
612 Lined Steel Grinding Jars |
1 |
1.3 |
5.0 |
8-1/4 |
7-3/4 |
10-7/8 |
5-1/8 |
11 |
*Volumes are ±5% |
Grinding Mill Jars Accessories
Stainless Steel Discharge Covers - Discharge covers are made of stainless steel with a lip for convenient pouring. Grinding media is retained while product is drawn off. Available for all jars except size 000. When ordering, specify size and jar model on which cover will be used. |
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Mill Jar Gaskets & Jar Replacement Covers / 774 - The extra-wide mouths speed emptying, cleaning and loading, jar sizes 1 through 6 are designated Model 774A and have the metal collar and locking bar shown. A slightly different method of securing the lid is used on sizes 000, 00 and 0 (designated Model 774B), which have a hook bar without the metal collar, as illustrated. |
Rubber Mill Jar Gaskets / 774 - The extra-wide mouths speed emptying, cleaning and loading, jar sizes 1 through 6 are designated Model 774A and have the metal collar and locking bar shown. A slightly different method of securing the lid is used on sizes 000, 00 and 0 (designated Model 774B), which have a hook bar without the metal collar, as illustrated. |
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Grinding Media
Burundum® Cylindrical Grinding Media - High-density, ultra-high fired Burundum® is the ideal medium for wet or dry milling. High specific gravity and cylindrical shape give it greater weight per volume, more contacts per mill revolution, greater area of attrition, with each contact. Result: faster, finer grinding or dispersion, often cutting milling time in half.
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- Long wearing, non-contaminizing grinding.
- Tough, hard, non-porous surface is chip-resistant, easily cleaned and unaffected by most acids or alkalies.
- Non-conductive, non-magnetic, with excellent resistance to mechanical and thermal shock.
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Zirconia Grinding Media - Zirconia grinding media mills twice as fast as equivalently sized alumina media with only 1/2 the media weight loss and only 1/3 the wear (weight loss) of the grinding jar - with accompanying reduced batch contamination. Available in radius end cylinders, with length equal to their outside diameters.
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- 1.6 times denser than high alumina.
- Hard, non-porous surface, chip resistant, easily cleaned.
- Unaffected by most alkalies and acid.
- Non-conductive, non-magnetic, excellent resistance to mechanical and thermal shock.
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High Density Alumina Spheres- These hard, impervious spheres, which are heavier than porcelain, mill faster with negligible silica contamination. Wear and chip resistant. Easy to clean.
- Hard, tough, non-porous, chip-resistant surface.
- Unaffected by most acids or alkalies.
- Non-conductive, non-magnetic, resistant to mechanical and thermal shock. Beads available.
Note: With a specific gravity of 3.4 the charging factor of high density alumina balls is approx. 6-1/2 lbs./gallon
* Specialty grinding media & dispersion bead media available. |
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Technical Data |
Diameter |
Pieces/lb |
1/2" |
150 |
1-1/2" |
5 |
Sold in 10 lb increments - Prices on Request |
Prices
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Prices subject to change Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only Export orders require quotations - click here for a quote For more info call us 1-800-762-2478 or 954-946-9454. |
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Item Number |
Item |
Prices |
Unitized Jar Mills |
ML-755RMV/RGC |
Unitized Jar Mill Model 755 |
$4,011.00 |
ML-764AVM/RGC |
Unitized Jar Mill Model 764 |
5,253.00 |
ML-764AVX |
Unitized Jar Mill Model 764 Explosion Proof Motor |
4,218.00 |
ML-784AVM |
Unitized Jar Mill Model 784 |
4,672.00 |
220V / 50Hz & 3 phase motors available - call for pricing |
Long Roll Jar Mills |
ML-801-CVM |
Long Jar Mill Roll Lenth 36 |
5,211.00 |
ML-801-DVM |
Long Jar Mill Roll Length 48 |
5,511.00 |
ML-801-FVM |
Long Jar Mill Roll Length 72 Explosion Proof Motor |
6,747.00 |
Grinding Mill Jars |
ML-AF-774-B000 |
Model 774 Roalox Alumina Mill Jar, 0.1 Gal |
370.00 |
ML-AF-774-B00 |
Model 774 Roalox Alumina Mill Jar, 0.3 Gal |
598.00 |
ML-AF-774-B0 |
Model 774 Roalox Alumina Mill Jar, 0.5 Gal |
669.00 |
ML-AF-774-A1 |
Model 774 Roalox Alumina Mill Jar, 1.5 Gal |
1,240.00 |
ML-AF-774-A2 |
Model 774 Roalox Alumina Mill Jar, 2.2 Gal |
1,548.00 |
ML-AF-774-A3 |
Model 774 Roalox Alumina Mill Jar, 3.3 Gal |
1,792.00 |
ML-AF-774-A6 |
Model 774 Roalox Alumina Mill Jar, 6.6 Gal |
3,122.00 |
ML-773-00 |
Model 773 Hi Alumina Grinding Jar, 0.3 Gal |
1,152.00 |
ML-773-1 |
Model 773 Hi Alumina Grinding Jar, 1.5 Gal |
1,734.00 |
ML-611-2 |
Model 611 Unlined Grinding Jar w/o Lift, 2.3 Gal |
2,632.00 |
ML-611L-00 |
Model 611 Unlined Grinding Jar w Lift, 0.3 Gal |
2,800.00 |
ML-612P-1 |
Model 612 Lined Grinding Jar (Urethane), 1.3 Gal |
1,322.00 |
Grinding Mill Jar Accessories |
ML-DC-612-2 |
611/612 SS Discharge Cover - 2 |
262.00 |
ML-DC-773-3 |
773 SS Discharge Cover - 3 |
398.00 |
ML-DC-774-00 |
774 SS Discharge Cover, with Lockbar, size 00 & 0 |
295.00 |
ML-DC-774-3 |
774 SS Discharge Cover, with Lockbar, size 3, 4 & 6 |
501.00 |
ML-C-774B0 |
Mill Jar Replacement Covers for Model 774, size 00 & 0 |
289.00 |
ML-NG-774B00 |
00 Neoprene (NG) Rubber Mill Jar Gasket Model 774 |
9.00 |
ML-NG-774B0 |
0 Neoprene (NG) Rubber Mill Jar Gasket Model 774 |
9.00 |
ML-VG-774A3 |
3 Viton (VG) Rubber Mill Jar Gasket Model 774 |
319.00 |
ML-VG-611-2 |
Viton 2 and 3 Gasket Model 774 |
197.00 |
Gaskets available for 611& 773 jars - call for pricing |
Grinding Media |
ML-BGM-1/2 |
1/2" O.D. x 1/2" Long (for rapid dispersion of liquid-based systems), 94 pieces/lb |
P.O.R. |
ML-BGM-1/4 |
Burundum Grinding Media/10 lb |
P.O.R. |
ML-BGM-13/16 |
13/16" O.D. x 13/16" Long (for dry grinding & general lab use), 18 pieces/lb |
P.O.R. |
ML-AS-1/2 |
Alumina Spheres 1/2" |
P.O.R. |
ML-AS-1-1/2 |
Alumina Spheres 1-1/2" |
P.O.R. |
Price Per 10lbs - (Piece count is approximate)
Note: With a specific gravity of 3.42, the charging factor of Burundum (pounds of media to be used per gallon of total jar capacity to give a 50% media charge) is approximately 9 pounds/gallon. |
ML-ZGM-3/8 |
3/8" Radius end cylinder, 141 pieces/lb |
P.O.R. |
ML-ZGM-1/2 |
1/2" Radius end cylinder, 61 pieces/lb |
P.O.R. |
ML-ZGM-1/4 |
1/4" Radius end cylinder, 424 pieces/lb |
P.O.R. |
Price Per 5lbs - (Piece count is approximate)
NOTE: With specific gravity of 5.5, the charging factor of zirconia is approximately 9 lbs./gallon. When scaling up from lab mills to larger production units, it is suggested the same size media be used. |
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