| Primary & Secondary Sizers | Primary / secondary; inward-rotating twin rolls; hydraulic product-size adjustment | Typical recommended reduction ratio 4:1; legacy published selection range: roll diameter approximately 508–1,524 mm, roll width approximately 1,219–3,658 mm | Tooth profile, segment arrangement, roll width, gap, rotation and drive interfaces |
| Tertiary Sizers | Tertiary; outward-rotating rolls; crushing between toothed rolls and adjustable sizing combs | Typical recommended reduction ratio 4:1; roll diameter, width and product size selected for the project | Alloy-steel segments, sizing combs, roll barrels, spherical roller bearings and twin drives |
| Mineral Sizers | Primary / secondary crushing of hard rock and clay-bearing ore; inward-rotating rolls; optional breaker bar | Published maximum feed 1,200 mm, reduced to approximately 300 mm; adjustable roll spacing | Crushing hammers, replaceable segments, breaker bar, liners, removal mechanism and twin drives |
| Fine-Grinding Sizers | Low-capacity, test or tertiary / quaternary fine crushing; inward rotation, reversible, twin drives | Fixed or fluid couplings; shafts adjust forward/backward to compensate wear; no single published fixed model table | Segments or hardfaced roll surfaces, symmetrical bolted liners, bearing housings, gearboxes and couplings |
| Sampling Sizers / Roll Crushers | Sampling and low-capacity service; Mini-Sizers and small double-roll crushers | Compact configurations of larger sizers / double-roll crushers; roll gap and tooth profile jointly control product size | Roll bodies, tooth profiles, bearings, gearboxes, seals and project interfaces |