Cone Crusher Suppliers - Shenyang Shilong Mechanical Manufacturing CO.,Ltd.

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No.19-1 9A 204, Econmic and Technology Development Area, Shenyang,China.

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slm@chinaslm.net

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+8615840301386

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+86-24-31123242

Flywheel of jaw crusher

The flywheel is a key energy-storage and transmission component in jaw crushers, mounted on the eccentric shaft to balance load fluctuations, store energy, and ensure stable operation via its rotational inertia. It is typically disc-shaped with a shaft hole (matching the eccentric shaft) and pulley grooves, made of gray cast iron (HT250/HT300) or ductile iron (QT450-10/QT500-7) depending on load requirements. Its manufacturing involves casting (sand casting with mold preparation, melting/pouring at 1380–1450°C, heat treatment for stress relief), machining (rough/semi-finishing of outer circles, inner holes, and pulley grooves, followed by precision grinding to achieve H7 tolerance and Ra ≤1.6μm surface roughness), and dynamic balancing (G6.3 grade to ensure residual unbalance ≤10g·cm). Quality control includes material inspection (chemical composition and mechanical properties), casting defect detection (MT/UT for cracks/porosity), machining precision checks (dimensional/geometric tolerances), and final dynamic balance verification. These measures ensure the flywheel’s reliability in high-speed rotation, with a service life of 8–10 years, critical for crusher stability.

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jaw crusher bearing block

The bearing block, a key component in jaw crushers, supports the eccentric shaft via bearings, enduring radial/axial loads. Constructed from QT500-7/HT350/ZG35SiMn, it comprises a bearing body with a precision bore (H7 tolerance), mounting flange, sealing grooves, and radial ribs. Manufacturing involves ductile iron casting (1350–1420°C pouring) with spheroidization, followed by precision machining (bore Ra ≤1.6 μm) and surface treatment. Quality control includes spheroidization checks (≥80%), dimensional inspection (coaxiality ≤0.05 mm), and load testing (1.5× rated load, deformation ≤0.05 mm). Critical for stable eccentric shaft operation, it ensures 3–5 years of service with proper lubrication, safeguarding bearing life and crusher efficiency.

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Jaw Crusher swing Jaws

The swing jaw is a core load-bearing component of jaw crushers, driving the swing jaw plate to reciprocate via connection to the eccentric shaft (upper) and toggle plate (lower). Structurally, it comprises a box-shaped main body, bearing seat, toggle plate seat, and reinforcing ribs, typically made of high-strength cast steel (e.g., ZG35CrMo). Its manufacturing involves resin sand casting (1520–1580°C pouring) followed by normalizing and tempering (hardness 180–230 HBW). Machining includes precision milling of key faces, boring/grinding of bearing seats (IT6 tolerance, Ra ≤0.8μm), and fitting of wear-resistant liners. Quality control covers material testing (chemical composition, impact energy ≥30J), UT/MT for defects, dimensional checks (parallelism, perpendicularity), and assembly trials. With a 5–10 year service life, it ensures stable crushing under high loads

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Jaw Crusher eccentric Shafts

The eccentric shaft, a core component of jaw crushers, converts rotational motion into the swing jaw's reciprocation via its eccentric structure, comprising main/eccentric shaft necks, a shaft body, and transition fillets. Made of high-strength alloys (e.g., 40CrNiMo), it undergoes forging (or casting for small models), precision machining (grinding to IT6 tolerance), and heat treatment (quenching/tempering) for strength (tensile strength ≥800 MPa). Quality control includes material composition checks, UT/MT for internal/surface defects, and dynamic balance testing (residual unbalance ≤10 g·cm). With a 5–8 year service life, it ensures stable crusher operation under high loads.

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jaw crusher side plate

The side plates are key load-bearing components in jaw crushers, connecting the front and rear walls to support the eccentric shaft bearings and withstand lateral forces. Constructed from ZG35CrMo/Q355D, they feature a plate body, bearing housing bores (coaxiality ≤0.05 mm), optional guide chutes, reinforcement ribs, and flange connections. Manufacturing involves cast steel casting (1500–1540°C pouring) with normalizing+tempering, followed by precision machining (Ra ≤1.6 μm for bearing bores) and surface coating. Quality control includes MT/UT for defects, hardness testing (220–260 HBW), and assembly trials ensuring ≤0.05 mm coaxiality. With a 5–8 year service life, they ensure stable crusher operation by maintaining structural rigidity and precise component alignment.

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Jaw Crusher swing Jaw Plates

The swing jaw plate is a key wear-resistant component in jaw crushers, working with the fixed jaw plate to crush materials via reciprocal movement. Structurally, it includes a toothed working surface, mounting holes, and reinforcing edges, typically made of high manganese steel (ZGMn13) for toughness and wear resistance. Its manufacturing involves sand casting (1400–1450°C pouring) followed by water quenching to form an austenitic structure, with machining to ensure tooth precision and mounting accuracy. Quality control covers chemical composition, impact toughness, casting defects, and dimensional accuracy. With a 3–6 month service life, it ensures efficient crushing through its design and material properties.

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