Mantle for GP100 Series Cone Crusher

C (Coarse): ~500–520 kg | M (Medium): ~460–480 kg | F (Fine): ~410–430 kg | EF (Extra Fine): ~380–400 kg. Manageable for single electric hoist (1t–2t SWL) on NW portable plants or stationary platforms.

The GP100 head cone backing volume is moderate. You need 25 – 35 liters (6.5 – 9 gallons) of two-component epoxy backing (Metso KrushMore, ESCOBACK 6000, Copps K-Back). Order a "GP100 Mantle Backing Kit" (typically 1–2 x 25L pails). Critical: Ensure the head cone spherical seat is perfectly clean, dry, and free of old backing residue before pouring.

The GP100 uses a Hydraulic Lock Nut (typically single-stage, ~M85/M90 thread). Clean & Blue-Match: Head cone seat & mantle bore must show >95% contact (Prussian Blue check). Lubricate: Copper/graphite anti-seize on threads only (never on spherical seat). Seat: Run nut down until mantle seats fully (verify zero gap at spherical seat with 0.03mm feeler). Pressurize: Apply hydraulic pressure to Metso Spec (Typically 250–300 bar / 3,600–4,350 psi). Use calibrated gauge. Lock: Engage mechanical locking set screws/pins per manual. Re-pressure Checks: MANDATORY at 2 hrs, 24 hrs, and 72 hrs. The long stroke generates high cyclic thermal loads that relax the nut.

Manufactured Sand circuits feed 100% crushed, high-silica, angular fines at high tonnage. This creates a "sandblasting" sliding abrasion + high compression environment. Standard Mn18Cr2 work-hardens too slowly (requires impact/strain) and wears via micro-cutting. TiC Composite provides instant 550–600 BHN hardness via dispersed Titanium Carbides, resisting the sliding abrasion of fines in the parallel zone. Life increase is typically 2.5x–3x, turning a 2-week liner into a 6–8 week liner on the constraint crusher.

Absolutely not. Catastrophic failure guaranteed. GP Mantle: Steep head angle (~50-55°), long parallel zone, constant stroke geometry. HP Bowl: Shallow cavity angle, shorter parallel zone, pivot-point geometry. Result: Immediate mechanical interference (mantle hits bowl liner), zero crushing action, destroyed threads/seats, massive safety hazard (tramp iron ejection). GP Mantle ONLY pairs with GP Bowl Liner.

1) Feed Distribution (NW Portable #1 Cause): Feed chute worn/misaligned, feeding 80% on one side. Fix: Rebuild chute liners, install static/rotating feed distributor. 2) Countershaft Bushing Wear: Excessive radial clearance (> 2.5–3mm) lets eccentric "whip", lifting mantle one side per revolution. Fix: Replace bronze bushings before new mantle. 3) Head Cone Seat Damage: Previous mantle spun/fretted the seat. Fix: Machine/Blue-match head cone seat to >95% contact. 4) Hydraulic Nut Pressure Loss: Nut backing off allows mantle to shift. Fix: Strict 2h/24h/72h re-pressure protocol.

Change at the FIRST of these limits (Matched Set Policy): Parallel Zone / Heel Thickness < 20–25 mm (0.8–1.0"). CSS Drift > 3 mm wider than target setting. Product Flakiness Index > 12–15% (loss of parallel zone geometry). Throughput Drop > 10% (profile worn to "hourglass"). Visual: Radial cracks in lower 1/3 (thermal fatigue) or severe gouging/pitting. GOLDEN RULE: On GP Series, ALWAYS change Mantle & Bowl Liner as a matched set. The steep cavity geometry amplifies "step wear" mismatch. Running new Mantle on worn Bowl (or vice versa) destroys the new liner in < 40% of normal life.