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Thomas Model 4 Wiley® Mill

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The Thomas Model 4 Wiley® Mill is ideal for the sample preparation of solid biofuels according to EN 14780.

  • Official Methods of Analysis AOAC 922
  • Moving parts are totally enclosed
  • 7 3/4” diameter milling chamber - 141 cu. in.
  • 2 1/4” diameter sample input
  • 50 to 1,000 gram sample volume
  • Single speed - 800 rpm at 60 Hz or 667 rpm at 50 Hz
  • All steel construction

Shearing Action: The four adjustable hard tool steel knives are bolted to a removable rotor. These knives work against six stationary knives bolted into the frame. The shearing action tends to avoid changes in the sample due to temperature increase, moisture loss, liquefaction, contamination, etc. caused by crushing and abrasion methods. The clearance of opposing knives is precisely adjusted for shearing clearance. Each stationary knife is independently adjustable. The fan effect of knives provides increased throughput and quick clearing of the chamber.

Grinding Chamber: The steel chamber measures 197 mm inside diameter x 76 mm deep. The hinged, heavy steel plate door provides full access to the chamber for cleaning. The clamping bolt with handwheel seals door against mill face. The neoprene shaft seal at rear of chamber prevents lubricant from seeping in while also protecting the ball bearings of the rotor shaft from sample dust.

Knives: The inlaid edges are specially formulated tool steel, tempered and hardened for durability and optimal cutting. Knife body is made of softer steel to absorb shocks and minimize breakage. Stainless steel knives are also available for milling corrosive materials.

Hopper: Steel hopper with enameled exterior finish is mounted to the top of grinding chamber with two thumbscrews. Capacity is approximately 550 mL . Includes a tight-fitting lid. Sliding stainless steel plate at base of hopper controls feeding rate. Dimensions: 4 1/2” top internal diamter x 2 1/4” throat internal diameter x 8 1/2” depth.

Sieves: 316 Stainless steel, curved round-hole screens are shaped to fit against the top of the delivery chute block so that samples cannot enter chute without passing through the screen. The chute block is released by two handwheels for easy interchanging of sieves.

Receivers: Adapter chutes slide into a spring-loaded holder beneath the chute block to collect product in a glass jar or stainless steel beaker. The two chutes included with the mill can be interchanged without opening mill door. Clearance below chute is 140 mm to base of bench models, permitting the use of standard receivers even if mill is placed back from edge of bench. Clearance below chute of stand mounted mills is 495 mm.

Jar Chute: Threaded to take standard Mason glass jars, up to 2 qt. (1.8 L) capacity. Jars permit observation of finished product, as well as affording convenience for storage of samples. A bag or sack can be tied on in place of the jar.

Beaker Chute: 105 mm i.d. x 146 mm deep, without spout. Spring-loaded runners hold turned rim of beaker securely against adapter plate to prevent sample loss, while allowing easy removal of beaker. Takes 1,200 mL stainless steel beaker (1527C25).

Drive Unit: Mounted in enameled steel housing directly behind the grinding chamber. Motor is a 1 hp, continuous duty, enclosed ball-bearing type, equipped with thermal overload cutout and needing no lubrication for years. Safety switch prevents operation when the chamber is open. Provides rotor speed of 800 rpm at 60 Hz and 667 rpm at 50 Hz. Pulley drive uses a 16 mm V-belt.

Models With Floor Stand

  • Heavy channel stock steel construction
  • Smooth rolling casters
  • Accessory shelf

Welded, rugged steel construction guarantees years of reliable use. Stand is mounted on four independent locking, smooth-rolling casters for easy mobility and transport. Accessory shelf is constructed of heavy aluminum and includes rubber mat. Overall dimensions  (W x D x H, in.): 20 x 26 x 49;  shelf dimensions (W x D x H, in): 13.8 x 15.9 x 1.8.

All Model 4 Mills (benchtop & floor stand models) include jar and beaker chutes, three sieves (1/2, 1 and 2 mm), one stainless steel beaker (1527C25), three 1 pint (0.47 L) glass jars (6176B12), and set of wrenches.

These mills were originally designed for grinding fertilizer materials, animal hair, hoofs, etc. The hard, tool steel cutting edges on the knives allow milling of a wider range of materials, including plastics, animal feed, bones, cables, cardboard, electronic scrap, feed pellets, foils, food, leather, material mixtures, non-ferrous metals, paper, pharmaceutical products, refuse derived fuels, rubber, waste, wood and so much more.

New Model Enhancements:

  • Redesigned enclosure to reduce dust from entering the machine enclosure
  • Sieves are now to be 316 stainless steel with optional certification of sieve hole size (must be requested at time of order)
  • Added rotational mass for improved cutting capabilities
  • Rigging eye hook included for ease of machine placement and relocation
  • Sounded dampening foam included on inside of enclosure top designed to reduce machine/motor noise
  • Redesigned rotating cutting head for ease of removal

Click here for a free pre-purchase sample processing test.

Milling Chamber Diameter:7.75" (141 cu. in.)
Sample Input Diameter:2.25"
Sample Volume:50 to 1,000 grams
Milling Speed:800 rpm at 60 Hz or
667 rpm at 50 Hz
Hopper Dimensions:4.5" top internal dia.
2.25" throat internal dia.
8.5" depth
Overall Dimensions:22 x 26 x 49" (W x D x H)
Stand Shelf Space width (in front of mill):24.388"
Stand Shelf Space length (NOT including the additional space in front of the mill):14.15"

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Product Detail
Thomas No.
1188Y47
Also known as: 930TSM4TUS
Description
Model 4 Wiley Mill, 115V, 50/60Hz
list price/quantitytotal
$0.00
Thomas No.
1188Y48
Also known as: 930TSM4TEU
Description
Model 4 Wiley Mill, 230V, 50/60Hz
list price/quantitytotal
$0.00
Thomas No.
1188Y51
Also known as: 930TSM4CUS
Description
Model 4 Wiley Mill, w/ Floor Stand, 115V, 50/60Hz
list price/quantitytotal
$0.00
Thomas No.
1188Y52
Also known as: 930TSM4CEU
Description
Model 4 Wiley Mill, w/ Floor Stand, 230V, 50/60Hz
list price/quantitytotal
$0.00
Thomas No.
1188Y54
Also known as: 930M4STC
Description
Floor Stand
list price/quantitytotal
$0.00
Thomas No.
1188Y56
Also known as: 930M4S304C
Description
304 Stainless Steel Stand
list price/quantitytotal
$0.00
Thomas No.
1157G62
Also known as: 930M4S316C
Description
316 Stainless Steel Stand
list price/quantitytotal
$0.00
Thomas No.
1157G71
Also known as: 930M4STHFH
Description
High Flow Hopper
list price/quantitytotal
$0.00
Thomas No.
1188Y58
Also known as: 930M460MESH
Description
60 Mesh Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1188Y59
Also known as: 930M4S05MM
Description
0.5mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1188Y60
Also known as: 930M4S1MM
Description
1mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1188Y61
Also known as: 930M4S2MM
Description
2mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1188Y62
Also known as: 930M4S3MM
Description
3mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1188Y63
Also known as: 930M4S4MM
Description
4mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1188Y64
Also known as: 930M4S5MM
Description
5mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1188Y65
Also known as: 930M4S6MM
Description
6mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1157G60
Also known as: 930M4S7MM
Description
7mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1157G61
Also known as: 930M4S8MM
Description
8mm Stainless Steel 316 Sieve
list price/quantitytotal
$0.00
Thomas No.
1157G63
Also known as: 930M4RCHST
Description
Replacement Rotating Cutter Head
list price/quantitytotal
$0.00
Thomas No.
1157G64
Also known as: 930M4RCHSS
Description
Stainless Steel Replacement Rotating Cutter Head
list price/quantitytotal
$0.00
Thomas No.
1157G65
Also known as: 930M4KTS4
Description
Replacement Rotating Blade Set (4)
list price/quantitytotal
$0.00
Thomas No.
1157G66
Also known as: 930M4KSS4
Description
Stainless Steel Replacement Rotating Blade Set (4)
list price/quantitytotal
$0.00
Thomas No.
1157G67
Also known as: 930M4KTS6
Description
Stationary Replacement Blades (6)
list price/quantitytotal
$0.00
Thomas No.
1157G68
Also known as: 930M4KSS6
Description
Stainless Steel Stationary Replacement Blades (6)
list price/quantitytotal
$0.00
Thomas No.
1157G70
Also known as: 930M4KTC4
Description
Stainless Steel Rotating Blade Set with Tungsten Carbide Insert (4)
list price/quantitytotal
$0.00
Thomas No.
1157G73
Also known as: 930M4BH
Description
Beaker Holder
list price/quantitytotal
$0.00
Thomas No.
1157G74
Also known as: 930M4JH
Description
Mason Jar Holder
list price/quantitytotal
$0.00
Thomas No.
1157G75
Also known as: 930M4WJH
Description
Wide Mouth Mason Jar Holder for Kerr/Ball Wide Mouth Jars
list price/quantitytotal
$0.00
Thomas No.
1157G69
Also known as: 930M4WP
Description
Wooden Plunger
list price/quantitytotal
$0.00
Thomas No.
1157G76
Also known as: 930M4TP
Description
PTFE Plunger
list price/quantitytotal
$0.00
Thomas No.
22A00N930
Description
Door Kit Wiley Mill 4 Upgrade. Features an improved design with enhanced fittings and gaskets for a tighter seal. For use on models built prior to December 12th, 2022 and serial numbers prior to C248313000.
list price/quantitytotal
$0.00
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