Thomas willey laboratory knife mill model 4

What is for sale: Thomas willey laboratory knife mill model 4

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We are selling a Thomas Willey Laboratory Mill model 4. Designed specifically for the reduction of analytical laboratory samples
• 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
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 such temperature rise, 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 through-put 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: 41/2” top internal diamter x 21/4” throat internal diameter x 81/2” depth.
Sieves: 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.
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.