What is the maximum belt speed this 200mm pulley can handle?

The maximum recommended belt speed for this pulley is 30 m/s, based on the cast iron material and dynamic balance grade G6.3 per ISO 1940. At higher speeds, vibration and centrifugal forces increase, potentially causing belt slip or bearing wear. For continuous operation above 25 m/s, we recommend dynamic balancing to G2.5 and verifying that the belt and shaft alignment are within 0.05mm. Always consult the belt manufacturer's speed rating as well, since belt construction limits may be lower than the pulley's capability.

How do I install this pulley on a 50mm shaft correctly?

Installation requires a clean 50mm shaft with a 14mm keyway. First, inspect the shaft for burrs or wear; the pulley bore tolerance is H7, so the shaft should be h6 for a proper fit. Apply a thin film of anti-seize compound to the shaft, then slide the pulley on without forcing—use a soft mallet if necessary. Install the key and tighten the set screw (if provided) to 45 Nm. Check radial runout with a dial indicator; it should not exceed 0.1mm. Misalignment will cause uneven belt wear and vibration, so verify alignment with a straightedge or laser tool before tensioning the belt.

What maintenance does this pulley require to achieve its full service life?

Inspect the pulley every 500 operating hours or monthly, whichever comes first. Check for groove wear using a profile gauge; replace the pulley if the groove width exceeds the original by 0.5mm or if there are visible cracks. Clean the groove with a wire brush to remove debris. Lubricate the shaft and keyway with a lithium-based grease every 2000 hours to prevent fretting corrosion. Recheck belt tension and alignment after the first 50 hours of operation and then every 500 hours. Under normal conditions, the pulley should last 5–7 years; abrasive environments may reduce this to 3–4 years, so more frequent inspections are advised.

Pulley

200mm Cast Iron Pulley with 1500kg Load Capacity for Heavy-Duty Conveyors

This industrial pulley is a 200mm outer diameter, 50mm bore cast iron (GG25) component engineered for continuous operation in conveyor systems, cranes, and lifting equipment. The 1500kg load capacity and V-belt SPB groove profile make it suitable for transferring torque in bulk material handling, mining, and manufacturing lines.

Load Capacity

1500kg

Material

Cast Iron GG25

Groove Profile

V-belt type SPB

Surface Finish

Phosphated and painted

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How Does a 200mm Cast Iron Pulley Perform in Continuous Conveyor Applications?

The 200mm outer diameter and 50mm bore define this pulley's role in power transmission systems. With a load capacity of 1500kg, it is designed for medium-to-heavy duty cycles where belts must maintain tension without deformation. The V-belt SPB groove profile accommodates standard SPB belts, ensuring proper wedging action and torque transfer. Cast iron GG25 (gray iron with 250 MPa tensile strength) provides excellent vibration damping and resistance to wear, making this pulley suitable for applications with frequent start-stop cycles or uneven loads. The 50mm bore fits standard shafts, and the phosphated surface treatment adds a layer of corrosion resistance for humid or mildly corrosive environments.

Typical industries include bulk material handling (conveyors for aggregate, grain, or packaged goods), overhead cranes and hoists, and industrial machinery such as crushers and mixers. In these settings, the pulley must endure continuous rotation, often 8–16 hours per day, without excessive belt wear or groove deformation. The 1500kg load rating is derived from static and dynamic tests under radial loads; it assumes proper belt tension and alignment. Unlike smaller pulleys in the same series (e.g., 100mm or 150mm), this 200mm model offers higher torque capacity and reduced belt bending stress, which extends belt life in high-power drives.

Compared to lightweight pulleys made from aluminum or stamped steel, this cast iron unit is heavier (approximately 8.5kg) but provides superior durability and heat dissipation. The solid construction resists cracking under shock loads, and the machined groove maintains dimensional accuracy over thousands of operating hours. For system designers, the key differentiator is the balance between load capacity and installation footprint: the 200mm diameter fits standard conveyor frame spacing while delivering 1500kg capacity, avoiding the need for larger, more expensive pulleys. This makes it a practical choice for retrofits and new builds where space is constrained but reliability is non-negotiable.

GG25 cast iron with 250 MPa tensile strength and 180–220 HB hardness for wear resistance.
Precision-machined SPB groove with tolerance ±0.1mm for proper belt seating and reduced slip.
Phosphated and painted finish passing 48-hour salt spray test (ASTM B117) for corrosion protection.

Core Technical Characteristics and Quantified Advantages

STEP 1

GG25 Cast Iron Construction with 250 MPa Tensile Strength

The pulley body is cast from GG25 gray iron, which offers a tensile strength of 250 MPa and Brinell hardness of 180–220 HB. This material provides excellent damping capacity, reducing vibration transmission to bearings and shafts by up to 30% compared to steel pulleys. The cast iron also resists wear from abrasive dust and particles common in mining and aggregate conveyors, extending groove life by 2–3 times versus aluminum alternatives.

STEP 2

Precision-Machined SPB Groove with ±0.1mm Tolerance

The V-belt groove is machined to SPB profile with a tolerance of ±0.1mm on groove width and angle. This ensures the belt seats properly, minimizing slippage and energy loss. Proper groove geometry also reduces belt edge wear, contributing to longer belt life. Each pulley is inspected with go/no-go gauges to verify groove dimensions before shipment, meeting ISO 4183 standards for V-belt drives.

STEP 3

1500kg Load Capacity for Heavy-Duty Cycles

Rated for a radial load of 1500kg under continuous operation, this pulley is suitable for conveyor systems handling bulk materials, crane hoists, and industrial machinery. The load rating is based on static and dynamic tests with a safety factor of 2.5. The 50mm bore and keyway (14mm wide) transmit torque reliably without shaft deformation, even during frequent start-stop cycles.

STEP 4

Phosphated and Painted Finish for Corrosion Resistance

The pulley undergoes phosphating followed by a protective paint coating, providing corrosion resistance that passes a 48-hour salt spray test per ASTM B117. This finish is suitable for indoor installations and sheltered outdoor environments with moderate humidity. The coating also reduces surface friction, helping to shed dust and debris that could otherwise accumulate in the groove and cause belt misalignment.