Thomas Wiley Mill Model 4

Thomas Wiley Mill Model 4

Thomas Wiley
  • Completely enclosed moving parts
  • Shearing action feature
  • Specially formulated knives, steel hopper and sieves
  • Versatile jar chute and beaker chute
  • Continuous duty drive unit motor
  • GMI can sharpen your knives
  • GMI can refurbish your Wiley Mill 4 to 'like NEW' condition
  • Our most popular mill - call for pricing & availability 

For more information or to place an offline order call 1-800-745-2710


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Thomas Scientific Wiley Mill Model 4 refurbished to specification
Includes mill, sieve, hopper, collection bottle, knife set.

$   Call for current pricing and availability.               Hot High Demand Item !

The Thomas Scientific Model 4 Wiley Mill is especially designed to maximize productivity, and minimize maintenance loss. Equipped with the proven Thomas Scientific shearing action, the Model 4 mills can be used for a wide variety of grinding applications. The steel-cutting edges on the knives also allow milling of a wider range of materials, including plastics. Thomas Model 4 Wiley® Cutting Mill is ideal for the sample preparation of solid biofuels according to EN 1478.  

The Model 4 is a very popular mill for plant scientists and is a mill of choice. The Model 4’s grinding chamber is equipped with the right tools to satisfy any grinding procedure. The knives have specially formulated, stainless steel inlaid edges for durability and optimal cutting. The steel hopper attached on top of the grinding chamber also has an enameled exterior finish with a sliding plate at the base to show the hopper controls feeding rate. 

The Thomas Model 4 Wiley® Mill features a versatile jar chute threaded to take standard Mason glass jars, up to 2 qt. (1.8 L) capacity. The jars permit observation of the finished product, as well as storage of samples. The beaker chute comes without a spout, and spring-loaded runners hold it securely against the adapter plate to prevent sample loss. Part of its rugged design, the Model 4 drive unit motor is a continuous duty, enclosed ball-bearing type, equipped with thermal overload cutout and needing no lubrication for years. Its safety switch prevents operation when the chamber is open. 

Call us today for pricing and availability on a Thomas Wiley Mill 4 !      Have one for sale?
GMI would love to buy it from you for cash!  

Rotor Speed800 rpm at 60 Hz or 667 rpm at 50 Hz
Sample Volume50 to 1,000 g
Milling Chamber Diameter7 3/4 in, 141 cu. in
Sample Input2 1/4 in
Hopper Dimensions4 1/2 top internal diameter
2 1/4 throat internal diameter
8 1/2 depth
Clearance Below Chute140 mm
Jar Chute CapacityUp to 1.8 L standard Mason glass jars
Beaker Chute Dimensions105 mm depth
146 mm deep
Beaker Chute Capacity1,200 mL stainless steel beakers
Overall Width15 inch
Overall Diameter24 inch
Overall Height28 inch
Shipping Weight371 lbs
Net Weight301 lbs
Power Requirements8.4 amps on 115 V, 4.2 amps on 230 V
GMI Certified Service means:
  • Healthy operation of your instrument
  • Helping to ensure the quality of your results
  • Lowering cost of ownership through multilple service agreement options
  • Prolonging instrument serviceable life
  • Safe Operation of your equipment
  • Minimizing downtime increases productivity and minimizes revenue loss
  • Instrument Evaluation Services
  • Contract Refurbishing
  • Relocation Services
  • Equipment Finder Service
  • Training Courses
  • Depot Repair
  • Instrument Decommisioning & Disposal Services
Service Agreements

Preventative Maintenance Visit
('tune up', including cleaning, lubrication, and adjustments)
1 Service Visit
Service Visit 1PM
1 Service Visit
1 2
Parts and Labor    

Discounted Parts
Discounted Labor (As needed)

Lab Equipment Replacement Parts & Accessories

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Apart from our meticulous inspection processes, GMI’s available warranties and multi-year service agreements guarantee customer satisfaction - no need to go through frustrating and time-consuming product returns!
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