High Pressure Grinding Rolls

High-pressure particle-bed comminution. Roll surface studs and tyres carry extreme compressive loads; cemented carbide studs are a key wear-life consideration.

Equipment Section View

High Pressure Grinding Rolls cutaway part location diagram

HPGR units use a fixed and floating roll, bearings, hydraulic loading, frame and feed/discharge. Wear narrative focuses on tyre–stud–edge–cheek structure and respects hard stops such as HYBRIDUR ≠ WC grade.

Equipment Parts

Part Identification and Technical Details

Tyres/surfaces, studs, edge protection, cheek plates and chute liners are principal; structure and material families only—numeric hard stops apply.

Individual parts

Individual and Maintenance Parts

Roll Surface / Tyre

Roll Surface / Roller Tyre

Material families: Mn-steel tyre / alloy body + WC-family studs / hardfaced forged / compound-cast tyre (OEM route—not a single grade)
Technical requirements: Separate tyre vs reusable shaft; file studs, edge parts and cheek plates apart. Remaining thickness, missing studs, scrap diameter, life and torque stay stop-fields.

Studs / Roll Studs

Stud / Roller Stud

Material families: WC-Co cemented carbide (family level; commercial grade only with install/maker data)
Technical requirements: Confirm stud size/tip/geometry and hole fit; hardness, Co, grain, TRS and life stay stop-fields.

Edge Guard

Edge Protection / Edge Liner

Material Options: High-chromium white iron, cemented carbide composites or hardfaced steel
Technical Requirements: High-chromium cast iron: commonly app; Control edge chipping and wear from material bypass. Confirm hardness, tensile strength and other numerical properties against a material specification, manufacturer data or approved project record before publishing.

Side Guard

Cheek Plate / Side Liner

Material Options: High-chromium white iron, bimetallic composite plate or NM450/NM500
Technical Requirements: Wear-resistant steel; Consider impact resistance and ease of replacement. Confirm hardness, tensile strength and other numerical properties against a material specification, manufacturer data or approved project record before publishing.

Feed Chute Liner

Material Options: NM450/NM500, bimetallic composite liners or high-chromium cast iron
Technical Requirements: Consider tough wear-resistant steel for heavy feed impact and high-chromium composite liners where erosion predominates.

Discharge Chute Liners

Discharge Chute Liner

Material Options: NM400—NM500, ceramic-rubber composite panels or bimetallic liners
Technical Requirements: Address erosion by compacted material and buildup, and provide for sectional replacement.

Bearing / Bearing Seal

Material Options: GCr15/100Cr6 bearing steel; NBR, HNBR or FKM seals
Technical Requirements: Retain material family and verification items; Confirm hardness, tensile strength and other numerical properties against a material specification, manufacturer data or approved project record before publishing.

Hydraulic Cylinder Seal

Material Options: Polyurethane primary seals with NBR/FKM secondary seals
Technical Requirements: Retain material family and verification items; Confirm hardness, tensile strength and other numerical properties against a material specification, manufacturer data or approved project record before publishing.

Scraper / Cleaner

Material Options: Wear-resistant polyurethane, wear-resistant rubber or hardfaced steel scrapers
Technical Requirements: Retain material family and verification items; Confirm hardness, tensile strength and other numerical properties against a material specification, manufacturer data or approved project record before publishing.

Frame Liners

Press Frame Liner

Material Options: NM400/NM450/NM500 or bimetallic wear plate
Technical Requirements: Use removable sections to protect the underlying frame. Confirm hardness, tensile strength and other numerical properties against a material specification, manufacturer data or approved project record before publishing.

Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, drawing and measured dimensions before ordering or manufacture.

Tyre / stud / edge structure (2026-10-31 · hard stops applied)

Shaft and shrink-fitted tyre may be separate; WC-family studs with autogenous ore bed between studs (Köppern public layer).
Mn-steel tyres (e.g. HRC8/800 context) stay at manganese family—do not invent Mn13/Mn18.
Edge: WC dovetail inserts ≠ HYBRIDUR; HYBRIDUR is a HIP PM edge-system name, not a WC commercial grade.
Polysius: hardfaced forged / compound-cast tyre / studded roll are separate routes.
Hard stop: no WC commercial grade/Co/grain/hardness/TRS, remaining tyre thickness, missing-stud counts, scrap diameter, life or torque on the parameter table.

HPGR / HRC model-contrast notes (2026-11-01 · B3)

HPGR is a technology class—not a tyre/stud material proof.
HRC™ 8 / HRC™ 800: public manganese-steel tyre + split-shaft tyre-change narrative; digits are not spacing variants; tyre interchange not proven here.
HRC™ Series may describe studded WC surfaces at series level—must not override the HRC8/800 manganese notes or map model-by-model.
HRC™ 3000: published install-case context, not proof every 2026 config is on sale.
HRC™e: product family with replaceable edge blocks/bolts/flanges; do not invent “e” onto legacy numeric models.
Hard stop: no one-material family rewrite; tyres, studs, edge blocks and feed wear parts are separate objects; grades/hardness/life stay off the parameter table; HYBRIDUR ≠ WC commercial grade.