KWS Manufacturing

Screw Conveyor Bulk Material Table

Tables are in alphabetical order. Click below to navigate to different sections.
Table keys and explanations are located in the Bulk Material Characteristics Section.

Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Acetylenogen (Calcium Carbide) + 1/2 70-90 30A 2.0 B4 I I II H
Adipic Acid -100M 45 30A 0.5 D3 I I III H, M, V
Alfalfa Meal -1/8 14-22 30A 0.6 B4 I I IV O, Q, V
Alfalfa Pellets -1/2 41-43 45 0.5 B4 I I II  
Alfalfa Seed -1/8 10-15 45 0.4 A1-A2-A3 I I I H
Almonds -1/2 28-30 30A 0.9 B4 I I III K
Alum, fine -1/8 45-50 30A 0.6 A1-A2-A3 I I III M, •
Alum, lumpy + 1/2 50-60 30A 1.4 B1-B2 I I II
Alumina -1/8 55-65 15 1.8 C4 III I II G, Q
Alumina, fine -100M 35 15 1.6 C4 III I II G, Q
Alumina, sized or briquette -3 65 15 2.0 C4 III I III  
Aluminate Gel (Aluminate Hydroxide) -1/8 45 30A 1.7 B4 I I III V
Aluminum Chips, dry -1/2 7-15 30A 1.2 B4 I I IV H, N
Aluminum Chips, oily -1/2 7-15 30A 0.8 B4 I I IV N, Q, V
Aluminum Hydrate (Aluminum Hydroxide) -1/2 13-20 30A 1.4 A1-A2-A3 I I III H, V
Aluminum Oxide -100M 60-120 15 1.8 C4 III I I G, H
Aluminum Ore (Bauxite) -3 75-85 15 1.8 D4 III I II  
Aluminum Silicate (Andalusite) -1/2 49 30A 0.8 C1-C2 I III III V
Aluminum Sulfate (Alum) -1/2 45-58 45 1.0 A1-A2-A3 I I II  
Ammonium Chloride, Crystalline -100M 45-52 30A 0.7 C1-C2 I III IV A, L
Ammonium Nitrate -1/8 45-62 30A 1.3 C3 I II III H, M, •
Ammonium Sulfate -1/2 45-58 30A 1.0 A1-A2-A3 I II III A, I, M, •
Antimony Powder -100M 30A 1.6 B4 II I II V, •
Apple Pomace, dry -1/2 15 30A 1.0 B4 I I IV Q, V
Arsenate of Lead (Lead Arsenate) -1/64 72 30A 1.4 A1-A2-A3 I I III G, L
Arsenic Oxide (Arsenolite) -100M 100-120 30A I III L, •
Arsenic, pulverized -100M 30 45 0.8 B4 I II L, •
Asbestos Rock, ore -3 81 15 1.2 C4 III I III L
Asbestos, shredded Fibers 20-40 30B 1.0 B4 II I IV L, P, Q
Ash, Black, ground -1/8 105 30A 2.0 A1-A2-A3 I I III  
Ashes, Coal, dry -1/2 35-45 30B 3.0 C4 II II IV Q
Ashes, Coal, dry -3 35-40 30B 2.5 C4 II II IV  
Ashes, Coal, wet -1/2 45-50 30B 3.0 D4 II II IV P
Ashes, Coal, wet -3 45-50 30B 4.0 D4 II II IV P
Asphalt, crushed -1/2 45 30A 2.0 A1-A2-A3 I I IV  
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Bagasse, dry Fibers 7-10 30A 1.5 B1-B2-B3 I I IV L, N, P, Q
Bakelite -1/8 30-45 45 1.4 A1-A2-A3 I I II  
Baking Powder -100M 40-55 30A 0.6 A2 I I III  
Baking Soda (Sodium Bicarbonate) -100M 40-55 45 0.6 A2 I I II  
Barite (Barium Sulfate) +1/2 120-180 30B 2.6 D4 II I III  
Barite, powder -100M 120-180 30B 2.0 B4 I I III G, P
Barium Carbonate -100M 72 30B 1.6 B4 I I IV L
Bark, Wood +1/2 10-20 30B 2.0 C4 I II IV N, Q
Barley, fine ground -1/8 24-38 30B 0.4 A1-A2-A3 I I III  
Barley, malted -1/2 31 30A 0.4 A1-A2-A3 I I III  
Barley, meal -1/2 28 30A 0.4 A1-A2-A3 I I III  
Barley, whole -1/8 36-48 45 0.5 A1-A2-A3 I I II H
Basalt -1/8 80-105 15 1.8 C4 III I II  
Bauxite, crushed -3 75-85 30B 2.5 D4 II I III  
Bauxite, dry, crushed -1/8 68 15 1.8 C4 I I II  
Beans, Castor, meal -1/8 35-40 30A 0.8 A1-A2-A3 I I III O
Beans, Castor, whole, shelled -1/2 36 45 0.5 A1-A2-A3 I I I O
Beans, Navy, dry -1/2 48 45 0.5 A1-A2-A3 I I I  
Beans, Navy, steeped -1/2 60 45 0.8 A1-A2-A3 I I II  
Beans, Soy -1/2 45-50 45 0.5 A2 I I I  
Beet Pulp, dry 11-16
Beet Pulp, wet 25-45
Bentonite -100M 50-60 45 0.7 B4 I I II G, P, Q
Bentonite, Crude -3 34-40 30A 1.2 B2 I I IV P
Benzene Hexachloride -100M 56 30A 0.6 A1-A2-A3 I I IV L
Blood, dried -3 35-45 30A 2.0 B4 I I IV M
Blood, dried, ground -100M 30 30A 1.0 A1-A2 I I III M
Bluestone (Copper Sulfate) -1/2 75-95 30A 1.0 B1-B2-B3 I III III
Bone Ash (Tricalcium Phosphate) -100M 40-50 30A 1.6 A1-A2 I I IV  
Boneblack -100M 20-25 45 1.5 A1-A2 I I II Q
Bonechar -1/8 27-40 30A 1.6 A1-A2 I I III  
Bonemeal -1/8 50-60 30A 1.7 B4 I I III  
Bones, crushed -3 35-50 30A 2.0 B4 I I IV  
Bones, ground -1/8 50 30A 1.7 B4 I I III  
Bones, whole Irregular 35-50 30A 3.0 B4 I I IV N
Borate of Lime -100M 60 30A 0.6 A1-A2-A3 I I III
Borax, lumps 1 1/2 to 2 55-60 30A 1.8 B4 I I III  
Borax, lumps 2 to 3 60-70 30A 2.0 B4 I I III  
Borax, fine -1/8 45-55 45 0.7 C4 I II II  
Borax, screenings -1/2 55-60 30A 1.5 B4 I I III  
Boric Acid -1/8 55 45 0.8 C4 I II II  
Boron -100M 75 15 1.0 B4 III I III  
Bran, Rice/Rye/Wheat -1/8 16-20 30A 0.5 A1-A2-A3 I I III H, Q
Braunite (Manganese Oxide) -100M 120 30B 2.0 B4 II I III  
Bread Crumbs -1/8 20-25 30A 0.6 A1-A2-A3 I I III J,K
Brewer’s Grain, spent, dry -1/2 14-30 30A 0.5 A1-A2-A3 I I IV  
Brewer’s Grain, spent, wet -1/2 55-60 30A 0.8 D3 I II IV  
Brick, ground -1/8 100-120 15 2.2 C4 III I III  
Bronze Chips -1/8 30-50 30A 2.0 B4 I I IV  
Buckwheat -1/8 37-42 45 0.4 A1-A2-A3 I I II H
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Calcine, Flour -100M 75-85 30A 0.7 A1-A2-A3 I I III  
Calcium Carbide -3 70-90 30A 2.0 B4 I I II H
Calcium Lactate -3 26-29 30A 0.6 B1-B2 I II IV K, L, P
Calcium Magnesium Carbonate + 1/2 90-100 30B 2.0 B4 II I II  
Calcium Phosphate -100M 40-50 30A 1.6 A1-A2-A3 I I IV  
Carbon, Activated, dry, fine -1/8 8-20 30A 1.2 B4 I I II K, •
Carbon Black, fine -100M 4-7 30A 0.4 A2 I I III P, Q, •
Carbon Black, pelleted -1/8 20-25 45 I I M, P, •
Carborundum* -3 100 15 3.0 C4 III I II  
Casein -1/8 36 30A 1.6 B4 I I III  
Cashew Nuts -1/2 32-37 30A 0.7 B4 I I IV  
Cast Iron, chips -1/2 130-200 30A 4.0 B4 I I IV  
Caustic Soda (Sodium Hydroxide) -1/8 88 30A 1.8 D4 I III III L, M
Caustic Soda, flakes (Sodium Hydroxide) -1/2 47 30A 1.5 D4 I III IV K, L, M, P
Celite (Diatomaceous Earth) -1/64 11-17 30B 1.6 C4 II I III G, P, Q, •
Cement, aerated (Portland) -100M 60-75 30B 1.4 B4 II I I G
Cement, clinker -3 75-95 30B 1.8 D4 II I III  
Cement, mortar -1/8 133 30A 3.0 C4 I I III K
Cement, Portland -100M 94 30B 1.4 B4 II I II G
Cerrusite (Lead Carbonate) -1/64 240-260 30A 1.0 B4 I I III G, L
Chalk, crushed -3 75-95 30A 1.9 B4 I I II P
Chalk, ground -100M 67-75 45 1.4 B4 I I II G, P, Q
Charcoal, ground -100M 18-28 30A 1.2 B4 I I IV H
Charcoal, lumps -3 18-28 30A 1.4 B4 I I IV H, K
Chips, Pulpwood +1/2 12-25 30A 1.0 B1 I I III N, Q
Chocolate Cake, pressed -3 40-45 30A 1.5 B2 I I II  
Chrome Ore -3 125-140 30B 2.5 C4 II I III  
Cinders, Blast Furnace -3 57 30B 1.9 D4 II II III  
Cinders, Coal -3 40 30B 1.8 D4 II II III  
Clay, brick, dry, fines -1/2 100-120 30B 2.0 C4 II I III  
Clay, calcined -1/8 80-100 30B 2.4 C4 II I III  
Clay, ceramic, dry, fine -100M 60-80 30A 1.5 A1-A2-A3 I I III J
Clay, dry, lumpy -3 60-75 30A 1.8 B4 I I III  
Clinker, Cement -3 75-95 30B 1.8 D4 II I III  
Clover Seed -1/8 45-48 45 0.4 A1-A2-A3 I I II H
Coal, Anthracite (Culm and River) -1/8 55-61 30A 1.0 B1-B2 I II III  
Coal, Anthracite, sized -1/2 49-61 45 1.0 B1-B2 I I II  
Coal, Bituminous, mined -3 40-60 30A 0.9 A1-A2 I I III F, H, P, Q
Coal, Bituminous, mined, sized -3 45-55 30A 1.0 A1-A2 I I III H, K, N
Coal, Bituminous, mined, slack -1/2 43-50 30A 0.9 B1-B2 I II IV H
Coal, Lignite -3 37-45 30A 1.0 B4 I II III H
Cocoa, Beans -1/2 30-45 45 0.5 A1-A2 I I II K
Cocoa, Nibs -1/2 35 45 0.5 B4 I I II  
Cocoa, Powdered -100M 30-35 30A 0.9 A2 I I IV G, P, Q
Coconut Shredded 20-22 30A 1.5 B2 I I IV  
Coffee, ground, dry -1/64 25 30A 0.6 A1-A2 I I III J
Coffee, ground, wet -1/64 35-45 30A 0.6 A1-A2 I I IV P
Coffee, soluble -1/64 19 30A 0.4 A2 I I III G,J,K,M,Q
Coffee, chaff -1/8 20 45 1.0 A1-A2 I I II G, Q
Coffee Beans, green -1/2 25-32 45 0.5 A1-A2 I I II J, K
Coffee Beans, roasted -1/2 20-30 45 0.4 A2 I I II J, K
Coke, breeze -1/2 25-35 15 1.2 C4 III I III H, Q
Coke, loose -7 25-35 15 1.2 D4 III I III H, K, N
Coke, Petrol, calcined -7 35-45 15 1.3 D4 III I III N
Compost -7 30-50 30A 1.0 C1-C2 I II IV N, P, •
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Concrete, Pre-Mix, dry -1/2 85-120 30B 3.0 C4 II I III M
Copper Ore + 1/2 120-150 30B 4.0 D4 II I III  
Copper Ore, crushed + 1/2 120-150 30B 4.0 C4 II I III  
Copper Sulfate (Bluestone) -1/2 75-95 30A 1.0 B1-B2-B3 I III III
Copperas (Ferrous Sulfate) -1/2 50-75 30A 1.0 B4 I I III M
Copra, cake, ground -1/8 40-45 30A 0.7 A1-A2-A3 I I IV C, O
Copra, cake, lumpy -3 25-30 30A 0.8 B1-B2-B3 I I III C, O
Copra, lumpy + 1/2 22 30A 1.0 B1-B2-B3 I I III C, O
Copra, meal -1/8 40-45 30A 0.7 B4 I I III C, O
Cork, granulated -1/2 12-15 30A 0.5 A1-A2-A3 I I III D, V, Q
Cork, ground -1/8 5-15 30A 0.5 A1-A2-A3 I I III D, V, Q
Corn, cleanings -1/8 20-30 30A 0.4 A1-A2-A3 I I III J, Q
Corn, cracked -1/8 40-50 45 0.7 A1-A2-A3 I I II H, J
Corn, grits -1/8 40-45 30A 0.5 A1-A2-A3 I I III H, J
Corn, steeped -3 40-60 0.8
Corn, shelled -1/2 45 45 0.4 A1-A2-A3 I I II H, V
Corn Cobs, ground -1/2 17 45 0.6 A1-A2-A3 I I II H, Q
Corn Cobs, whole Irregular 12-15 30A B1-B2 I I II H, N, •
Corn Ear -16 56 30A B1-B2 I I III H, N
Corn Fiber Feed -1/8 15-35 30A 1.5 I I III  
Corn Fiber, dewatered -1/8 10-25 30A 0.6 A1-A2-A3 I I III  
Corn Fiber, wet -1/8 15-50 30A 0.8 A1-A2-A3 I I III J, M
Corn Filter Aid -1/8 15-50 15 2.5 C4 III I III  
Corn Germ -1/8 21 30A 0.4 A1-A2-A3 I I III H, J, O, Q
Corn Germ, dewatered -1/8 30-35 30A 0.6 A1-A2-A3 I I III H, J, M
Corn Germ, dry -1/8 30-40 30A 0.5 A1-A2-A3 I I III  
Corn Germ, expanded cake -1/8 30-40 30A 2.0 A1-A2-A3 I I III  
Corn Germ, oil meal -1/8 30-35 30A 0.6 A1-A2-A3 I I III  
Corn Oil, cake -7 25 30A 0.6 A1-A2 I I IV C, O
Corn Seed -1/2 45 45 0.4 A1-A2-A3 I I II H, J, K
Corn Sugar -1/8 30-35 30A 1.0 A2 I I III H, J, M, V
Corn Sugar, crystalline, dry -1/8 25-60 30A 1.5 A2 I I III  
Corn Sugar, crystalline, wet -1/8 30-60 30A 1.5 A2 I I III  
Corn Meal -1/8 32-40 30A 0.5 A1-A2 I I III H, J, O, V
Cottonseed, cake, crushed -1/2 40-45 30A 1.0 A1-A2 I I IV C, O, V
Cottonseed, cake, lumpy -7 40-45 30A 1.0 B1-B2 I I IV C, O, V
Cottonseed, dry, delinted -1/2 22-40 45 0.6 A1-A2 I I II P, V
Cottonseed, dry, not delinted -1/2 18-25 30A 0.9 A1-A2 I I IV P, Q, V
Cottonseed, flakes -1/2 20-25 30A 0.8 A1-A2 I I III C, O, Q, V
Cottonseed, hulls -1/8 12 30A 0.9 A1-A2 I I III Q, V
Cottonseed, meal, expeller -1/8 25-30 30A 0.5 C1-C2 I I IV C, O, V
Cottonseed, meal, extracted -1/8 35-40 30A 0.5 A1-A2 I I IV C, O, V
Cottonseed, meal, dry -1/8 40 30A 0.6 A1-A2 I I III C, O, V
Cottonseed, meal, rolled -1/2 35-40 30A 0.6 A1-A2 I I IV C, O, V
Cracklings, crushed -3 40-50 30A 1.3 B1-B2-B3 I I IV C, O, V
Cryolite, dust (Kryalith) -100M 75-90 30B 2.0 B4 II I III F, G, L, V
Cryolite, lumpy (Kryalith) -16 90-110 30B 2.1 B4 II I III L, V
Cullet, fine -1/2 80-120 15 2.0 D4 III I III  
Cullet, lump -16 80-120 15 2.5 D4 III I III  
Cupric Sulfate (Copper Sulfate) -1/2 75-95 30A 1.0 B1-B2-B3 I III III
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Diatomaceous Earth (Diatomite) -1/64 11-17 30B 1.6 C4 II I III G, P, Q, •
Dicalcium Phosphate -1/64 40-50 30A 1.6 A1-A2-A3 I I III V
Disodium Phosphate -1/64 25-31 30A 0.5 C4 I I III K
Distiller’s Grain, spent, dry -1/8 30 30A 0.5 B4 I I III  
Distiller’s Grain, spent, wet -1/2 40-60 30A 0.8 C1-C2 I I IV N
Dolomite, crushed -1/2 80-100 30B 2.0 B4 II I III  
Dolomite, lumpy +1/2 90-100 30B 2.0 B4 II I III  
Earth, Loam, dry, loose -1/2 76 30B 1.2 B4 II I III  
Ebonite -1/2 63-70 30A 0.8 A1-A2-A3 I I III V
Egg, powder -1/64 16 30A 1.0 A2 I I III G, H, J, Q
Epsom Salts (Magnesium Sulfate) -1/64 40-50 30A 0.8 A1-A2-A3 I I III M, V
Ethanedioic Acid (Oxalic Acid) -1/8 60 30A 1.0 A1-A2 I III III L, M
Feldspar, ground -100M 65-80 15 2.0 B4 III I III  
Feldspar, lumps -7 90-100 15 2.0 B4 III I III  
Feldspar, powder -200M 100 30B 2.0 B4 II I III  
Feldspar, screenings -1/2 75-80 15 2.0 B4 III I III  
Ferrous Sulphate -1/2 50-75 30A 1.0 B4 I I III M
Ferrous Sulfide (Iron Sulfide), lumps -1/2 120-135 30B 2.0 A1-A2-A3 II I II V
Ferrous Sulfide (Iron Sulfide), mesh -100M 105-120 30B 2.0 A1-A2-A3 II I III V
Fish Meal -1/2 35-40 30A 1.0 A1-A2-A3 I I IV C, J, V
Fish Scraps -7 40-50 30A 1.5 B1-B2-B3 I I IV C, •
Flaxseed -1/8 43-45 30A 0.4 A1-A2-A3 I I III H, P, V
Flaxseed Cake (Linseed Cake) -7 48-50 30A 0.7 B1-B2 I I IV O
Flaxseed Meal (Linseed Meal) -1/8 25-45 30A 0.4 A1-A2 I I IV O, V
Flour, Graphite -100M 28 30A 0.5 A1-A2-A3 I I III F, G, J, V
Flour, Oat -100M 35 30A 0.5 A1-A2-A3 I I III V
Flour, Potato -200M 48 30A 0.5 A1-A2 I I III G, H, J, V
Flour, Silica -1/64 80 30B 1.5 B4 II I IV  
Flour, Soybean -1/64 25-35 30A 1.0 A1-A2-A3 I I III G, H, V
Flour, Wheat -1/64 33-40 30A 0.6 A2 I I IV F, H, J, V
Flour, Wood -1/8 16-36 30A 0.4 A1-A2 I I III H, P, Q, V
Flour Calcine -100M 75-85 30A 0.7 A1-A2-A3 I I III  
Flue Dust, Basic Oxygen Furnace -1/64 45-60 30B 3.5 C4 II I III F, G
Flue Dust, Blast Furnace -1/64 110-125 30B 3.5 C4 II I III  
Flue Dust, Boiler H, dry -1/64 30-45 30B 2.0 C4 II I III F, G
Fluorspar (Calcium Fluoride) -1/8 80-100 30B 2.0 B4 II I III  
Fluorspar, lumps -7 90-110 30B 2.0 B4 II I III  
Flyash -1/64 30-45 30B 2.0 C4 II I III G
Flyash, Coal -1/64 30-60 30B 2.0 C4 II I III G
Flyash, Fluidized Bed -1/64 60-90 30B 3.0 C4 II I III  
Foundry Sand, dry -1/8 90-110 15 1.7 C4 III I III  
Fuller’s Earth, Oil Filter, burned -1/8 40 15 2.0 C4 III I II  
Fuller’s Earth, Oil Filter, raw -1/8 35-40 30B 2.0 B4 II I II  
Fuller’s Earth, Oil Filter, spent 35% oil 60-65 15 2.0 D4 III I III I, O
Galena (Lead Sulfide) -100M 240-260 30A 1.2 B4 II I II G, L, P
Gelatin, granulated -1/8 32 30A 0.8 A2 I I III J, K, M, V
Gilsonite -1/2 37 30B 1.5 D4 II II III H, L
Glass, Batch -1/2 80-100 15 2.5 D4 III I III  
Glue, ground -1/8 40 30A 1.7 B4 II I IV M
Glue, pearl -1/2 40 30A 0.5 A1-A2-A3 I I III M
Glue, veg., powdered -1/64 40 30A 0.6 A1-A2-A3 I I IV M
Gluten Cake, wet -1/2 30-50 30A 2.5 A2 I I IV  
Gluten, Meal, dry -1/8 30-40 30A 0.6 A2 I I III J
Granite, broken +1/2 95-100 15 2.5 D4 III I II  
Granite, fine -1/2 80-90 15 2.5 C4 III I II  
Grape Pomace -3 15-20 30A 1.4 B4 I I IV M, Q, V
Graphite Flakes -1/8 40 45 0.5 A1-A2-A3 I I II F, J, V
Graphite Flour -100M 28 30A 0.5 A1-A2-A3 I I III F, G, J, V
Graphite Ore +1/2 65-75 30A 1.0 B4 I I III F
Grass Seed -1/8 10-32 30A 0.4 A2 I I III H, Q
Guano, dry -1/2 70 30A 2.0 C1-C2 I I III
Gypsum, calcined -1/8 55-60 30A 1.6 B4 I I III M
Gypsum, calcined, powdered -100M 60-80 30A 2.0 B4 I I III M
Gypsum, raw -3 70-80 30A 2.0 B4 I I II  
Green Vitriol (Ferrous Sulfate) -1/2 50-75 30B 1.0 B4 II I II  
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Hay, chopped -1/2 8-12 30A 1.6 B1-B2 I I III D, Q, •
Hexanedioic Acid (Adipic Acid) -100M 45 30A 0.5 D3 I I III H, M
Hominy -1/2 35-50 30A 0.4 A1-A2-A3 I I II J, V
Hops, spent, dry -3 35 30A 1.0 B1-B2-B3 I I III V
Hops, spent, wet -3 50-55 30A 1.5 D3 I II IV N, V
Hydroxybenzoic Acid (Salicylic Acid) -1/8 29 15 0.6 C4 III I III M
Ice, crushed -3 35-45 30A 0.4 B1-B2 I I III K, V
Ice, cubed -3 33-35 30A 0.4 A2 I I III K, V
Ice, flaked -1/2 40-45 30A 0.6 A2 I I III K, V, •
Ice, shells -3 33-35 30A 0.4 A2 I I IV K, V
Ilmenite Ore -3 140-160 15 2.0 C4 III I III  
Iron Ore -1/64 120-180 15 2.2 C4 III I III  
Iron Oxide Pigment -100M 25 30B 1.0 A1-A2-A3 II I III F, G, J
Iron Oxide, Millscale -1/2 75 30B 1.6 B4 I I III  
Kafir (Corn) -1/2 40-45 30A 0.5 C4 I I II V
Kaolin Clay -3 63 30A 2.0 B4 I I II  
Kaolin Talc -1/64 42-56 30A 2.0 B4 I I III F, G, J
Lactose -1/64 32 30A 0.6 A2 I I III H, J, M, P
Lead Arsenate -1/64 72 30A 1.4 A1-A2-A3 I I III G, L
Lead Arsenite -1/64 72 30A 1.4 A1-A2-A3 I I III G, L
Lead Carbonate -1/64 240-260 30A 1.0 B4 I I III G, L
Lead Ore -1/8 200-270 30A 1.4 C4 I I III L
Lead Ore -1/2 180-230 30B 1.4 C4 II I III L
Lead Oxide, Red Lead -100M 30-150 30A 1.2 B4 II I III G, J, L
Lead Oxide, Red Lead -200M 30-180 30A 1.2 B4 II I III F, G, J, L
Lead Sulfide -100M 240-260 30A 1.0 B4 II I III G, L, P
Lignite, air-dried -3 37-45 30A 1.0 B4 I II III H
Lime, hydrated -1/8 40 30A 0.8 B4 I I III F, G, P, V
Lime, hydrated, pulverized -1/64 32-40 30A 0.6 A1-A2 I I III F, G, P, V
Lime, unslaked -1/8 60 30A 0.6 A2 I I III P, V
Lime, pebble, unslaked -1/2 53-56 45 2.0 B1 I I II C, M
Limestone, agricultural -1/8 68 30A 2.0 B4 II I III  
Limestone, crushed +1/2 85-90 30B 2.0 B4 II I III  
Limestone, dust -1/64 55-95 30B 1.6-2.0 B4 II I IV G, Q
Limonite, ore -1/2 120 15 1.7 C4 III I IV  
Lindane (Benzene Hexachloride) -100M 56 30A 0.6 A1-A2-A3 I I IV L
Litharge (Lead Oxide) -100M 30-150 30A 1.2 B4 II I III G, J, L
Lithopone -200M 45-50 30A 1.0 A1-A2 I I III G, L
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Magnesium Chloride (Magnesite) -1/2 33 30A 1.0 A1-A2 I I IV  
Magnesium Sulfate (Epsom Salts) -1/64 40-50 30A 0.8 A1-A2-A3 I I III M
Maize -1/8 40-45 45 0.4 A1-A2-A3 I I I H
Malt, dry, ground -1/8 20-30 30A 0.5 A1-A2-A3 I I III H, J, L, Q, V
Malt, dry, whole -1/2 20-30 30A 0.5 A1-A2-A3 I I III H, V
Malt, wet or green -1/2 60-65 30A 0.4 A1-A2-A3 I I III  
Malt, meal -1/8 36-40 30A 0.4 A1-A2-A3 I I II J, V
Malt, sprouts -1/2 13-15 30A 0.4 A1-A2-A3 I I III J, V
Manganese Dioxide -100M 70-85 30A 1.5 B1-B2 I II III H, L, •
Manganese Ore +1/2 125-140 15 2.0 C4 III I III  
Manganese Oxide -100M 120 30B 2.0 B4 II I III  
Manganese Sulfate -1/2 70 15 2.4 C4 III I III  
Marble, crushed -1/8 80-95 15 2.0 C4 III I III  
Marl (Clay) + 1/2 80 30B 1.6 B4 II I III  
Meat, ground -1/4 50-55 30A 1.5 B1-B2 I II IV C, K, P, •
Meat, scraps, with bone Scraps 40 30B 1.5 D4 II I IV C, N, •
Mica, flakes -1/8 17-22 30B 1.0 B4 II I I G, N, Q, V
Mica, ground -1/8 13-15 30B 0.9 B4 II I III V
Mica, pulverized -100M 13-15 30B 1.0 B4 II I III G, V
Milk, dried, flakes -1/8 5-6 30A 0.4 A2 I I III H, J, M, Q
Milk, dried, whole -100M 20 30A 0.4 A2 I I III G, J, M P
Milk, malted -1/64 27-30 30A 0.9 A2 I I IV G, H, J, P
Milk, powdered -1/8 20-45 45 0.5 A2 I I II G, H, J
Milk, powdered, whole -1/8 20-36 30A 0.5 A2 I I III J, M, P
Milk Sugar (Lactose) -100M 32 30A 0.8 A2 I I III H, J, P
Mill Scale (Steel) Irregular 120-125 30B 3.0 C4 II II IV  
Milo, ground -1/8 32-36 30A 0.5 A1-A2-A3 I I II V
Milo, maize (Kafir) -1/8 40-45 45 0.4 A1-A2-A3 I I I H, V
Molybdenite Powder -1/8 107 30A 1.5 B4 II I II  
Monosodium Phosphate -1/8 50 30B 0.6 B4 II I III  
Mortar, wet Irregular 150 30B 3.0 C4 II II IV  
Muriate of Potash -1/8 77 15 1.8 D4 III III II  
Mustard Seed -1/8 45 45 0.4 A1-A2-A3 I I I H, V
Naphtalene Flakes -1/8 45 30A 0.7 A1-A2-A3 I I III V
Nicotinic Acid (Niacin) -1/64 35 30A 0.8 B4 I I III J
Oakite (Trisodium Phosphate) -1/8 60 30B 1.7 B4 II I II  
Oats -1/2 26 45 0.6 A1-A2-A3 I I Ii G, H, V
Oats, crimped -1/2 19-26 30A 0.5 A1-A2-A3 I I III V
Oats, crushed -1/8 22 30A 0.6 A1-A2-A3 I I IV H, Q, V
Oats, flour -100M 35 30A 0.5 A1-A2-A3 I I III V
Oats, hulls -1/8 8-12 30A 0.5 A1-A2-A3 I I III H, Q, V
Oats, rolled -1/2 19-24 30A 0.6 A1-A2-A3 I I III H, Q, V
Oleo (Margarine) Irregular 59 30A 0.4 B1-B2 I I IV C, E, J, O, P
Orange Peels, dry Irregular 15 30A 1.5 B1-B2 I I IV  
Oxalic Acid, Crystal—Ethane Diacid Crystal -1/8 60 30A 1.0 A1-A2 I III III K, M
Oyster Shells, ground -1/2 50-60 30B 2.0 B4 II II III  
Oyster Shells, whole -3 80 30B 2.5 B4 II II III N
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Paper Pulp, stock 5% 62 30A 1.5 B1-B2 I I IV N
Paper Pulp, stock 6-15% 60-62 30A 1.7 B1-B2 I I IV N
Paraffin Cake, broken -1/2 45 30A 0.6 A1-A2 I I IV E
Peanuts, meal -1/8 30 30A 0.6 A2 I I III J, V
Peanuts, clean, shelled -3 15-20 30A 0.6 B1-B2 I I III K
Peanuts, raw, uncleaned, unshelled -3 15-20 30B 0.7 C4 I I III K
Peanuts, shelled -1/2 35-45 30A 0.4 A2 I I III K, V
Peas, dried -1/2 45-50 45 0.5 A1-A2-A3 I I I H, K, V
Perlite, expanded -1/2 8-12 30B 0.6 B4 II I III  
Phosphate Disodium -1/8 50-60 30A 0.9 A1-A2 I I III  
Phosphate Acid, Fertilizer -1/8 60 45 1.4 B1-B2 I II II  
Phosphate Rock, broken + 1/2 75-85 30B 2.1 B2 II I III  
Phosphate Rock, pulverized -1/8 60 30B 1.7 B4 II I III  
Phosphate of Soda (Disodium Phosphate) -1/64 25-31 30A 0.5 C4 I I III K
Phosphate Sand, granular -1/8 90-100 15 2.0 C4 III I III  
Phosphoprotein (Casein) -1/8 36 30B 1.6 B4 II I II  
Phosphoric Acid (Phosphate Acid) -100M 60 30A 1.4 A2 I I II  
Plaster of Paris (Gypsum) -200M 60-80 30B 0.9 B4 II I III G
Polyethylene, pellets -1/8 35 30A 0.4 A2 I I III J, K
Polystyrene Beads -1/8 40 30A 0.4 A2 I I II J, K, V
Polyvinyl Chloride, pellets Irregular 20-30 30A 0.6 A2 I II IV E, J, K
Polyvinyl Chloride, powder -100M 20-30 30A 1.0 A1-A2-A3 I II IV E
Potash, dry (Muriate of Potash) -1/8 70 15 2.0 D4 III III III  
Potash, mine run (Muriate of Potash) +1/2 75 15 2.2 D4 III III III  
Potassium Carbonate -1/8 51 30B 1.0 B4 II II III  
Potassium Chloride, pellets -1/2 120-130 30A 1.6 C4 I II II M
Potassium Nitrate -1/2 76 30B 1.2 D4 II II I H, V
Potassium Nitrate -1/8 80 30B 1.2 D4 II II II H, V
Potassium Sulfate -1/8 42-48 30B 1.0 B4 II I IV P
Potato, flour -200M 48 30A 0.5 A1-A2 I I III G, H, J, V
Pumice -1/8 42-48 30B 1.6 C4 II I IV  
Pyrite, pellets -1/2 120-130 30B 2.0 C4 II I II  
Quartz -1/2 80-90 15 2.5 C4 III I II  
Quartz -100M 70-80 15 1.7 C4 III I II  
Quicklime (Lime, unslaked) -1/8 60 30A 0.6 A2 I I III P
Red Lead (Lead Oxide) -100M 30-150 30A 1.2 B4 II I III G, J, L
Rice, hulled -1/2 45-49 45 0.4 A1-A2-A3 I I II J, V
Rice, hulls -1/8 20-21 30A 0.4 A1-A2-A3 I I III H, Q
Rice, polished -1/2 30 45 0.4 A1-A2-A3 I I I J, V
Rice, rough -1/2 32-36 30A 0.6 A1-A2-A3 I I III H, V
Rice Bran -1/8 20 30A 0.4 A1-A2-A3 I I III H, Q, V
Rice Grits -1/8 42-45 30A 0.4 A1-A2-A3 I I III J, V
Rosin -1/2 65-68 30A 1.5 A1-A2-A3 I I IV K, V
Rubber, pelleted -3 50-55 30A 1.5 B1-B2-B3 I I IV  
Rubber, reclaimed, ground -1/2 23-50 30A 0.8 A1-A2-A3 I I IV V
Rye -1/8 42-48 45 0.4 A1-A2-A3 I I I H, V
Rye, bran -1/8 15-20 30A 0.4 A1-A2-A3 I I III Q, V
Rye, feed -1/8 33 30A 0.5 A1-A2-A3 I I III H, V
Rye, meal -1/8 35-40 30A 0.5 A1-A2-A3 I I III V
Rye, middlings -1/8 42 30A 0.5 A1-A2 I I III V
Rye, shorts -1/2 32-33 30A 0.5 B1-B2 I I III V
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Safflower, cake -3 50 30B 0.6 B4 II I II  
Safflower, meal -1/8 50 30A 0.6 A1-A2-A3 I I III V
Safflower Seed (Safflower) -1/8 45 45 0.4 A1-A2-A3 I I I H, V
Sal Ammoniac (Ammonium Chloride) -100M 45-52 30A 0.7 C1-C2 I III IV A, L
Salicylic Acid -1/8 29 15 0.6 C4 III I III M
Salt, dry coarse -1/2 45-60 30B 1.0 C4 II II III M, V
Salt, dry fine -1/8 70-80 30B 1.7 C4 II II III M, V
Salt Cake, dry, coarse (Sodium Sulfate) -1/8 85 30B 2.1 C4 II II III M
Salt Cake, dry, pulverized (Sodium Sulfate) -1/8 65-85 30B 1.7 C4 II II III M
Saltpeter (Potassium Nitrate) -1/2 76 30B 1.2 C4 II II I H
Sand, Dry Bank, damp -1/8 110-130 15 2.8 C4 III I IV  
Sand, Dry Bank, dry -1/8 90-110 15 1.7 C4 III I III  
Sand, Foundry, prepared -1/8 90 15 3.0 C4 III I III  
Sand, Foundry, shakeout -3 90-100 15 3.0 D4 III I III R
Sand, Silica, dry -1/8 90-100 15 2.0 C4 III I II  
Sand, Silica, resin-coated -1/8 104 15 2.0 C4 III I II  
Sand, Zircon, resin-coated -100M 115 15 2.3 C4 III I II  
Sawdust, dry -1/8 10-13 30A 1.4 A1-A2-A3 I I IV M, P
Sea-Coal -1/8 65 30B 1.0 B4 II I III  
Seed, Alfalfa -1/8 10-15 45 0.4 A1-A2-A3 I I I H
Seed, Clover -1/8 45-48 45 0.4 A1-A2-A3 I I II H
Seed, Corn -1/2 45 45 0.4 A1-A2-A3 I I II H, J, K
Seed, Grass -1/8 10-32 30A 0.4 A2 I I III H, Q
Seed, Mustard -1/8 45 45 0.4 A1-A2-A3 I I I H, V
Seed, Safflower -1/8 45 45 0.4 A1-A2-A3 I I I H, V
Seed, Sesame -1/8 27-41 30B 0.6 B4 II I II V
Seed, Sorghum (Milo or Kafir) -1/8 32-36 30A 0.5 A1-A2-A3 I I II  
Seed, Sunflower -1/2 19-38 45 0.5 A1-A2-A3 I I I V
Seed, Timothy -1/8 36 30A 0.6 B2 I I III H, Q, V
Sesame Seed -1/8 27-41 30B 0.6 B4 II I II V
Shale, crushed -1/2 85-90 30B 2.0 B4 ll I III  
Shellac, powdered or granulated -1/8 31 30A 0.6 A2 I I III J, V
Silica Flour -1/64 80 30B 1.5 B4 II I IV  
Silica Gel (Silicic Acid) -3 45 15 2.0 C4 III I III C, E, K, M
Silicon Dioxide (Quartz) -1/2 80-90 15 2.5 C4 III I II  
Slag, Blast Furnace, crushed -3 130-180 15 2.4 D4 III I III Q
Slag, Furnace, granular, dry -1/2 60-65 15 2.2 A1-A2-A3 III I III  
Slaked Lime (Lime, hydrated) -1/8 40 30A 0.8 B4 I I III F, G, P
Slate, crushed -1/2 80-90 30B 2.0 B4 II I III  
Slate, ground -1/8 82-85 30B 1.6 B4 II I III  
Sludge, Sewage, dry Irregular 40-50 30B 0.8 D4 II II IV O
Sludge, Sewage, dry, ground -1/8 45-55 30B 0.8 D4 II II IV  
Snow, fresh -1/8 5-12 30A 0.4 A2 I I IV  
Snow, packed +1/2 15-35 30A 0.8 B1 I I IV  
Soap, beads or granules -1/8 15-35 30A 0.6 A1-A2-A3 I I III K, M
Soap, chips -1/2 15-25 30A 0.6 A1-A2-A3 I I III K, M
Soap Detergent -1/8 15-50 30A 0.8 A1-A2-A3 I I III A, K
Soap Flakes -1/8 5-15 30A 0.6 A1-A2-A3 I I III K, M, P, Q
Soap Powder -1/8 20-30 30A 0.9 A1-A2-A3 I I II P
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Soapstone (Talc) -200M 40-50 30A 2.0 A1-A2-A3 I I IV G, P, Q
Soda Ash, heavy (Sodium Carbonate) -1/8 55-65 30B 1.0 B4 II I III  
Soda Ash, light (Sodium Carbonate) -1/64 20-35 30B 0.8 B4 II I III G, Q, V
Sodium Aluminate, ground -1/8 72 30B 1.0 B4 II I III  
Sodium Aluminum Sulphate -100M 75 30B 1.0 B4 II I III
Sodium Bicarbonate (Baking Soda) -100M 40-55 45 0.6 A2 I I II  
Sodium Nitrate -3 70-80 45 1.2 B1-B2 I III II H
Sodium Phosphate -1/8 50-60 30A 0.9 A1-A2 I I III  
Sodium Sulfate, dry, coarse -1/8 85 30B 2.1 C4 II II III M
Sodium Sulfate, dry, pulverized -1/8 65-85 30B 1.7 C4 II II III M
Sodium Sulfite -1/8 96 30B 1.5 B4 II I IV P
Sorghum Seed (Milo or Kafir) -1/8 32-36 30A 0.5 A1-A2-A3 I I II  
Soybean, dust -1/64 25-35 30A 2.0 A1-A2-A3 I I III G, H
Soybean, cake -1/2 40-43 30A 1.0 A1-A2-A3 I I III O, V
Soybean, cracked -1/2 30-40 30B 0.6 B4 II I III H, O, V
Soybean, flour -1/64 25-35 30A 1.0 A1-A2-A3 I I III G, H, V
Soybean, meal, cold -1/8 35-45 30A 0.6 A1-A2-A3 I I III V
Soybean, meal, hot -1/8 40 30A 0.6 D3 I II III  
Soybean, whole -1/2 45-50 30B 1.0 B4 II I II H, O
Soybean Flakes, raw -1/2 15-35 30A 0.8 A1-A2-A3 I I III Q, V
Soybean Flakes, spent -1/4 18-20 30A 0.6 A2 I I II Q, V
Starch -1/64 25-50 45 1.0 A1-A2-A3 I I I G, H, V, •
Steel Turnings (Chips), crushed -3 100-150 30B 3.0 D4 II I IV N, O
Stibium (Antimony) -100M 30A 1.6 B4 II I II
Sugar, Powdered -100M 50-60 30A 0.8 A2 I I III H, J, P,
V, •
Sugar, raw, cane -1/8 55-65 30A 1.5 A2 I I III H, J, P
Sugar, refined, granulated, dry -1/8 50-55 30A 1.0-1.2 A2 I I III H, J, M, V
Sugar, refined, granulated, wet -1/2 55-65 30A 1.4-2.0 A2 I I III P
Sugar Beet, pulp, dry -1/2 12-15 30B 0.9 B4 II I II H, •
Sugar Beet, pulp, wet -1/2 25-45 30A 1.2 A1-A2-A3 I I III H, P
Sulphur, crushed -1/2 50-60 30A 0.8 A1-A2 I I III H
Sulphur, ground -1/64 50-60 30A 0.6 A1-A2 I I II G, H
Sulphur, lumps -3 80-85 30A 0.8 D4 I I III H
Sunflower Seed -1/2 19-38 45 0.5 A1-A2-A3 I I I V
Bulk Material Maximum Particle Size (in.) Bulk Density (lbs/ft³) %
Trough Loading
Material Factor (MF) Component
/Bearing Series
Abrasive- ness Corrosive- ness Flowability Special Notes
Taconite, pellets +1/2 116-130 15 2.0 D4 III I II K
Talc -1/2 80-90 30B 0.9 B4 II I III  
Talc, powder -200M 50-60 30B 0.8 B4 II I III G, P, V
Tanbark, ground -1/8 55 30A 0.7 A1-A2-A3 I I IV
Timothy Seed -1/8 36 30A 0.6 B2 I I III H, Q, V
Titanium Dioxide (llmenite) -3 140-160 15 2.0 C4 III I III  
Tobacco, scraps -3 15-25 30A 0.8 B1-B2 I I IV Q
Tobacco, snuff -1/8 30 30A 0.9 A1-A2-A3 I I IV H, G, K, V
Tricalcium Phosphate -1/64 40-50 30A 1.6 A1-A2 I I IV  
Triple Super Phosphate -1/8 50-55 30B 2.0 C4 II III III L
Trisodium Phosphate -1/2 60 30B 1.7 B4 II I III  
Trisodium Phosphate, granular -1/8 60 30B 1.7 B4 II I III  
Trisodium Phosphate, pulverized -1/64 50 30B 1.6 B4 II I III V
Tung Nuts -3 25-30 30A 0.7 B1-B2 I I I V
Tung Nut Meats, crushed -3 28 30A 0.8 B1-B2 I I II O, V
Uintaite (Bentonite) -100M 50-60 45 0.7 B4 I I II G, P, Q
Urea Prills, Coated -1/8 43-46 45 1.2 A1-A2-A3 I I II  
Vermiculite, expanded -1/2 16 30A 0.5 A1-A2 I I III Q
Vermiculite, ore -3 80 30B 1.0 B4 II I III  
Vetch -1/8 48 30B 0.4 A1-A2-A3 II I I H, V
Vulcanite (Ebonite) -1/2 63-70 30A 0.8 A1-A2-A3 I I III  
Walnut Shells, crushed -1/8 35-45 30B 1.0 B4 II I III V
Wheat -1/2 45-48 45 0.4 A1-A2-A3 I I II H, V
Wheat, cracked -1/8 40-45 45 0.4 A1-A2-A3 I I II H, V
Wheat, germ -1/8 18-28 45 0.4 A1-A2-A3 I I II V
White Lead, dry -1/64 75-100 30B 1.0 B4 II I III G, L, V
Wood Bark +1/2 8-16 30B 1.5 B1-B2 I I IV N, Q
Wood Chips, screened -3 10-30 30A 0.6 B1-B2 I I IV N, Q
Wood Flour -1/8 16-36 30A 0.4 A1-A2 I I III H, P, Q, V
Zinc Concentrate Residue -1/8 75-80 15 1.0 C4 III I III  
Zinc Oxide, heavy -100M 30-35 30A 1.0 A1-A2 I I IV G, P
Zinc Oxide, light -100M 10-15 30A 1.0 A1-A2 I I IV G, P, Q, V