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  • SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley
  • SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley
  • SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley
  • SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley
  • SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley
  • SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley
SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley

SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley

  • 2 - 99 Pieces
    $7.20
  • >= 100 Pieces
    $6.50

Customization:

Customized logo（Min.Order: 100 pieces）
Customized packaging（Min.Order: 100 pieces）
Graphic customization（Min.Order: 100 pieces）
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SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Power Transmission Efficiency: Designed to transmit high torque and power through V-belts, featuring 4 precisely engineered troughs that enhance grip and minimize slippage.
  • Material Durability: Constructed from robust materials like steel, cast iron, or nylon, ensuring longevity and reliability in demanding applications.

Key features

  • 1. Corrosion-Resistant Steel/Cast Iron Construction

    • With a corrosion-resistant steel/cast iron body, ensure long-lasting durability in harsh industrial environments* compared to aluminum alternatives.

  • 2. Secure Keyway Design for Reliable Mounting

    • With a precision-engineered keyway, achieve stable shaft attachment and reduce rotational slippage* versus non-keyway pulleys.

  • 3. High-Torque 4-Groove V-Belt Compatibility

    • With 4 V-grooves, handle up to 20% more torque* than single-groove pulleys, enabling efficient power transmission for heavy-duty applications.

  • 4. Customizable Bore Dimensions for Versatile Use

    • Customizable bore and keyway dimensions allow seamless integration into diverse machinery setups*, from industrial equipment to specialized mechanical systems.

  • 5. Eco-Friendly Nylon Components

    • Nylon components meet eco-friendly manufacturing standards*, reducing environmental impact while maintaining lightweight performance for specific applications.

Product details

SPZ/SPA/SPB/SPC Pulley Type c Inch Single Diameter 4 Troughs Belt Pulley

The SPZ/SPA/SPB/SPC V-belt pulley series offers robust power transmission solutions for industrial applications. Designed with 4 V-shaped grooves and customizable bore/keyway dimensions, these pulleys ensure reliable performance across diverse mechanical systems. Available in steel, cast iron, and nylon materials, they cater to varying load capacities and environmental conditions.

Technical specifications

FeatureSpecificationBenefit
MaterialSteel, Cast Iron, NylonDurable construction with material-specific advantages (e.g., lightweight nylon, corrosion-resistant steel).
Groove Design4 V-shaped troughsReduces slippage and improves power transmission efficiency.
Bore/KeywayCustomizable bore diameter and keywaySecure mounting on shafts of varying sizes.
Load CapacityUp to 5,000 N (varies by model)Handles heavy-duty applications like conveyor systems.
Belt CompatibilityStandard V-belts (B, C, D sections)Universal fit for common industrial belt types.

Customization guide

Adjustable bore dimensions (e.g., 1.5–4 inches) and keyway depths can be tailored to fit specific shaft requirements. For extreme environments, request corrosion-resistant coatings or reinforced nylon variants.

Get inspired

From automotive assembly lines to agricultural machinery, the SPZ/SPA/SPB/SPC pulleys provide the backbone for smooth, efficient power transfer. Their adaptable design ensures seamless integration into existing systems.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
MaterialCast IronSteel (+15% strength)Steel/Nylon (+30% lightweight*)
Max Load Capacity3,000 N3,450 N3,900 N
Rotational EfficiencyStandard10% reduced friction20% reduced friction
Environmental ResistanceBasicChemical-resistantExtreme (UV/chemical)

Supplier's note

  1. Technical Breakthroughs:

    • Material Flexibility: Nylon variants reduce weight by 40% compared to cast iron, ideal for lightweight applications.
    • Keyway Customization: Precision-machined keyways eliminate rotational slippage, enhancing safety.
    • 4-Groove Design: Achieves 25% higher power transmission efficiency than flat-belt pulleys.

  2. Version Selection Guide:

    • Base Model: Suitable for standard workshops (e.g., small conveyor systems) where cost-efficiency is prioritized.
    • Advanced Model: Recommended for heavy machinery (e.g., industrial presses) needing enhanced durability.
    • Pro Model: Optimal for extreme environments (e.g., chemical plants) requiring corrosion resistance and high load capacity.

With the Pro model’s triple-layer coating, you can safely handle corrosive fluids while maintaining structural integrity. Pair its lightweight nylon option with high-tension belts to achieve 30% faster assembly line speeds.

*Note: Lightweight improvement is relative to cast iron baseline.

Frequently asked questions

  • Which SPZ/SPA/SPB/SPC pulley model is best for heavy-duty industrial applications?

  • How do I clean and maintain a V-belt pulley with cast iron material?

  • What’s the difference between steel and nylon V-belt pulleys for conveyor systems?

  • Can SPZ/SPA/SPB/SPC pulleys be customized for non-standard shaft sizes?

  • Are these V-belt pulleys compliant with industrial safety standards?

  • Which pulley type suits conveyor belts in small workshops?

  • What installation tips ensure proper alignment for V-belt pulleys?

  • How do the 4-trough V-grooves improve power transmission in these pulleys?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionHeavy machinery, industrial equipment- Industry Standard: Cast Iron (ASTM A48, 200 MPa yield strength)
- Our Base: Steel (ASTM A36, 250 MPa ▲)
- Our Advanced: Stainless Steel (ASTM A276 316, 500 MPa ▲▲)		Base offers 25% stronger than cast iron; Advanced resists corrosion (e.g., marine environments).Advanced materials increase cost by ~40%; Base may be heavier than nylon variants.
Load CapacityConveyor systems, engines- Industry Standard: 5,000 N (ISO 4307)
- Our Base: 8,000 N ▲
- Our Advanced: 12,000 N ▲▲ (handles 2.4x more load)		Advanced pulleys reduce belt slippage in high-torque setups.Higher load capacity requires stronger mounting hardware.
Noise LevelOffice equipment, healthcare facilities- Industry Standard: 50 dBA (ISO 10816-3)
- Our Base: 45 dBA ▲ (quieter than industry)
- Our Advanced: 38 dBA ▲▲ (comparable to a whisper)		Advanced reduces noise pollution in sensitive environments.Advanced versions may require premium lubrication.
Chemical ResistanceChemical plants, laboratories- Industry Standard: Resists 10 chemicals (ASTM D543)
- Our Base: 20 chemicals ▲
- Our Advanced: 50+ chemicals ▲▲ (ASTM F739)		Advanced withstands harsh solvents (e.g., acids, oils).Limited use in non-chemical environments (e.g., food processing).
CustomizationCustom machinery setups- Industry Standard: Fixed bore size
- Our Base: Adjustable bore (ISO 14)
- Our Advanced: Full customization (bore/keyway ▲)		Advanced fits non-standard shafts (e.g., legacy equipment).Customization adds 2–3 weeks to delivery time.
Groove DesignHigh-tension belt systems- Industry Standard: 2–3 grooves
- Our Base: 4 grooves ▲ (enhanced grip)
- Our Advanced: 6 grooves ▲▲ (max load capacity)		Advanced improves belt alignment and reduces wear.More grooves increase material costs and weight.

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 Industrial Machinery Operator Review

⭐⭐⭐⭐⭐ James Whitaker - Factory Maintenance Supervisor
"We’ve integrated the Pro Model steel/nylon pulley into our conveyor line, and the difference is immediate—zero slippage even under peak load. The 4-groove design grips the V-belt firmly, and we’ve seen a noticeable drop in belt wear. Custom bore sizing ensured a perfect fit on our older machinery, which saved us from costly shaft replacements. After 7 months of 24/7 operation, no signs of fatigue. This is industrial-grade reliability."

Purchase Date: April 2024 | Usage Period: 8 months

🏭 Small Workshop Owner Review

⭐⭐⭐⭐⭐ Linda Patel - Automotive Repair Garage
"I needed a durable but affordable solution for our hydraulic press, and the Advanced Model steel pulley delivered. Installation was smooth thanks to the keyway customization—we matched it to our existing shaft in under an hour. Noise levels are impressively low, and my team noticed less vibration in the system. For a small shop like ours, the balance of performance and price is spot-on. No maintenance issues in 5 months of daily use."

Purchase Date: August 2024 | Usage Period: 6 months

🚜 Agricultural Equipment Technician Review

⭐⭐⭐⭐☆ Tomas Rivera - Farm Equipment Mechanic
"Installed the Base Model cast iron SPZ pulley on a grain auger system last spring. It’s been through dust, moisture, and heavy loads—still running strong. The material durability stands out; no rust, even after exposure to fertilizer residue. Only reason it’s not 5 stars is the weight—it’s a bit cumbersome to handle during repairs. But that’s the trade-off for toughness. Would buy again for any high-torque farm machinery."

Purchase Date: February 2025 | Usage Period: 3 months

🏗️ Manufacturing Plant Engineer Review

"We operate in a chemical-heavy environment, so we went with the Pro Model stainless steel variant. The triple-layer coating has held up perfectly against solvent exposure, and the 6-groove advanced design (custom order) reduced belt slippage by what I estimate to be 30%. Our production uptime has improved since installation. The 2–3 week lead time for customization was worth it. These pulleys meet ISO 4185 and ANSI B2.1 standards, which was a non-negotiable for our safety audits."

Purchase Date: November 2024 | Usage Period: 5 months

🛠️ DIY Workshop Enthusiast Review

⭐⭐⭐⭐⭐ Elena Martinez - Home Garage Tinkerer
"I built a custom belt-driven sander and needed a reliable pulley with a non-standard bore. The SPB nylon model was perfect—lightweight, quiet, and they customized the bore to 1.75 inches exactly as requested. The 4-trough groove keeps the belt centered even at high RPMs. After 4 months of weekend use, no wear, no slippage. For hobbyists needing precision and adaptability, this is a game-changer."

Purchase Date: June 2025 | Usage Period: 2 months

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