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Home  >>  Products  >>  Dispersion  >>  Jar Mill Equipment

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.



 

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.

Unitized Jar Mills

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
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


Long Roll Jar Mills

Long roll jar mills are designed specifically for applications where space is at a premium. Available in single and multiple-tier models. Roll lengths: 36, 48, 72 inches.

Motors - Mills are furnished with motors and drives under rolls, TEFC or Explosion Proof.

  • Totally enclosed DC drive motors permit solid-state-control of roll speed. Machines have speed range of between 50 and 300 RPM
  • Rolls mounted in ball bearing pillow blocks
  • Rolls are 2-1/2" in dia. Made of long-wearing, oil, solvent and chemical-resistant Neoprene rubber; bleeds off static electricity generated by rotating jars.
  • Free-turning ball-bearing jar stops mounted at each end of drive rolls assure jars remain on rolls.
  • Jar positioners made of long-wearing polyurethane are available at extra cost for any long roll jar mill. They keep jars separated, positioned exactly. Simple to install, quickly moved to any position.
  • Three-position lateral spacing adjustment of idler roll allows mills to handle standard size 000 through No. 6 Roalox jars or round containers from 2" to 15" diameter.
  • Options: Digital Tachometers, automatic timers, and jar positioners.
  • Spare parts are available.
  • Explosion-proof model has constant speed of 290 RPM

Jar Positioner Optional Jar Positioner Jar Positioner
  1. 3-position lateral adjustment for idler roller.
  2. Free-turning ball-bearing antifriction jar stop.
  3. Lifetime lubricated and sealed ball bearing.

Technical Data
Model No. No. Tiers Roll Length Overall Dims Motor Loading HP Approx. Max Wt. Per Tier Shipping Wt.
Length Width Height
801-CVM 1 36 44-3/4 16-1/2 20-1/8 1/2 240 300
801-DVM 1 48 56-3/4 16-1/2 20-1/8 1/2 240 300
801-FVM 1 72 80-3/4 16-1/2 20-1/8 3/4 340 385

Grinding Mill Jars

Model 774 Roalox Alumina-Fortified Grinding Jars - Made of wear-resistant chemical porcelain fortified with alumina. Provide nearly 4 times the wear-life of porcelain jars. Lower silica content cuts silica contamination by more than half. High-strength, impact-resistant body minimizes chipping and breakage.
  • 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.
  • Options: Solvent-proof Solvoflex (water soluble PVA). Viton® and other materials are available for gaskets.
Roalox Alumina Grinding Jars


Typical Chemical Composition: Roalox Jars
Al2 03: 62%
Si02: 32%
Na02: 1.0%
K20: 2.5%
Ti02: 0.7-0.8%
Fe2 03: 0.4-0.5%
Ca0: <0.2%
Mg0: <1%

Technical Data for Model 774 Roalox Alumina-Fortified Grinding Jars
Jar Size Jar Volume* Approx Outside Dims (inches) Approx. Net Wt. (lbs)
Gallons Liters Diam. Jar Height Overall Ht. Mouth Opening
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
4 4.6 17.6 14-5/8 10 13 8 46
6 6.6 25.0 14-5/8 13 15 8 55
*Volumes are ±10%

 

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.
High Almina Grinding Jars


Typical Chemical Composition: High Alumina Jars
A1203: 88.5%
SiO2: 6.5%
MgO: <1.3%
Alkalis: <0.2%
Fe2O3: 0.1%
TiO2: 0.1%
Zro2: 2.8%

Technical Data for Model 773 High Alumina Grinding Jars
Jar Size Jar Volume* Approx Outside Dims (inches) Approx. Net Wt. (lbs)
Gallons Liters Diam. Jar Height Overall Ht. Mouth Opening
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
3 3.3 12.4 13 10-3/8 13-1/2 9-3/4 45.0
*Volumes are ±10%

 


Unlined Stainless Steel Grinding Jars - Available in 7 standard sizes in stainless steel, with or without internal lifter bars. Easy to use, fast cleaning. Feature wide mouths, curved inside corners.


Model 611 (without Lifter Bars) and MODEL 611L (with Lifter Bars) Unlined Steel Grinding Jars is shown in the picture.

Stainless Steel Grinding Jars

Technical Data - Unlined
Jar Size Jar Volume* Approx Outside Dims (inches) Approx. Net Wt. (lbs)
Gallons Liters Diam. Jar Height Overall Ht. Mouth Opening
00 0.3 1.0 6-1/4 4-1/4 6-1/2 3-1/2 7
0 0.5 1.8 6-1/4 4-3/4 6-3/4 3-7/8 8
1 1.3 5/0 8-1/4 6-3/4 9-3/4 5-1/2 9
2 2.3 8.7 10-1/4 7-1/4 10-1/4 6-1/2 13
3 3.4 12.8 10-1/4 10-3/4 13-1/2 6-1/2 16
4 4.6 17.6 12-1/4 10-1/4 13-1/4 8 20
6 6.6 25.0 14-1/4 10-1/2 13-1/2 8 24
*Volumes are ±5%

 


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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)
Steel Grinding Jars

Technical Data - Lined
Jar Size Jar Volume* Approx Outside Dims (inches) Approx. Net Wt. (lbs)
Gallons Liters Diam. Jar Height Overall Ht. Mouth Opening
00 0.3 1.0 6-1/4 4-1/4 6-1/2 3-1/2 8
0 0.5 1.8 6-1/4 5-1/2 7-1/2 3-1/2 10
1 1.3 5.0 8-1/4 7-3/4 10-7/8 5-1/8 11
2 2.3 8.7 10-1/4 8-1/2 11-5/8 6-1/8 14

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. Stainless Steel Discharge Cover

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. Rubber Mill Jar Gaskets

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.

Burundum Grinding Media
  • 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.

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.

Zirconia Grinding Media
  • 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.

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.


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.
Item Number Item Prices
Unitized Jar Mills
ML-755RMV/RGC Jar Mill 1/4HP DC Totally Enclosed Motor $3,748.50
ML-764AVM/RGC Jar Mill 1/4HP DC Totally Enclosed Motor 4,909.80
ML-764AVX Jar Mill 1/4HP Explosion Proof Motor 4,056.15
ML-784AVM Jar Mill 1/4HP DC Totally Enclosed Motor 4,536.00
220V / 50Hz & 3 phase motors available - call for pricing
Long Roll Jar Mills
ML-801-CVM Jar Mill 1/2 HP Motor 115/60/1 ea 50-300 RPM 4,694.97
ML-801-DVM Jar Mill 1/2 HP Totally Enclosed Motor 115/60/1 ea 50-300 RPM $5,350.48
ML-801-FVM Jar Mill 3/4 HP Explosion Proof Motor 115/60/1 ea 50-300 RPM 6,133.34
Grinding Mill Jars
ML-AF-774-B000 Model 774 Roalox Alumina Mill Jar, 0.1 Gal $348.60
ML-AF-774-B00 Model 774 Roalox Alumina Mill Jar, 0.3 Gal 563.85
ML-AF-774-B0 Model 774 Roalox Alumina Mill Jar, 0.5 Gal 631.05
ML-AF-774-A1 Model 774 Roalox Alumina Mill Jar, 1.5 Gal 1,204.35
ML-AF-774-A2 Model 774 Roalox Alumina Mill Jar, 2.2 Gal 1,460.55
ML-AF-774-A3 Model 774 Roalox Alumina Mill Jar, 3.3 Gal 1,690.50
ML-AF-774-A6 Model 774 Roalox Alumina Mill Jar, 6.6 Gal 2,945.25
ML-773-00 Model 773 Hi Alumina Grinding Jar, 0.3 Gal $1,086.75
ML-773-1 Model 773 Hi Alumina Grinding Jar, 1.5 Gal 1,635.90
ML-611-2 Model 611 Unlined Grinding Jar w/o Lift, 2.3 Gal 2,392.95
ML-611L-00 Model 611 Unlined Grinding Jar w Lift, 0.3 Gal 2,264.85
ML-612P-1 Model 612 Lined Grinding Jar (Urethane), 1.3 Gal 1,202.25
Grinding Mill Jar Accessories
ML-DC-612-2 611/612 SS Discharge Cover - 2 $246.75
ML-DC-773-3 773 SS Discharge Cover - 3 362.00
ML-DC-774-00 774 SS Discharge Cover, with Lockbar, size 00 & 0 278.25
ML-DC-774-3 774 SS Discharge Cover, with Lockbar, size 3, 4 & 6 472.50
ML-C-774B0 Mill Jar Replacement Covers for Model 774, size 00 & 0 273.00
ML-NG-774B00 00 Neoprene (NG) Rubber Mill Jar Gasket Model 774 7.35
ML-NG-774B0 0 Neoprene (NG) Rubber Mill Jar Gasket Model 774 7.35
ML-VG-774A3 3 Viton (VG) Rubber Mill Jar Gasket Model 774 303.45
ML-VG-611-2 Viton 2 and 3 Gasket Model 774 187.95
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 $94.50
ML-BGM-1/4 Burundum Grinding Media/10 lb 339.15
ML-BGM-13/16 13/16" O.D. x 13/16" Long (for dry grinding & general lab use), 18 pieces/lb 67.20
ML-AS-1/2 Alumina Spheres 1/2" 126.00
ML-AS-1-1/2 Alumina Spheres 1-1/2" 75.60
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 $298.20
ML-ZGM-1/2 1/2" Radius end cylinder, 61 pieces/lb 258.30
ML-ZGM-1/4 1/4" Radius end cylinder, 424 pieces/lb 307.65
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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