Custom CNC Machined Steel Pulley with Black Electrophoretic Coating – Precision

Product Specification

This CNC-machined steel pulley is a robust and precision-engineered component designed for mechanical power transmission, lifting mechanisms, and load-handling systems. Manufactured from high-strength steel and finished with a durable black electrophoretic coating, it offers excellent corrosion resistance, smooth operation, and aesthetic appeal.

The pulley features a central through-hole for mounting onto a shaft or axle, as well as a symmetrical groove between two rounded flanges, allowing it to securely guide rope, wire, or chain during operation.

Key Features

• Material: High-strength carbon or alloy steel

• Manufacturing Method: High-precision CNC milling & turning

• Surface Finish:

  • Black electrophoretic coating (e-coating)

  • Anti-rust, wear-resistant, and smooth to the touch

  • Semi-gloss appearance for a professional, finished look

• Structure:

  • Dual-disc design with rounded outer edges

  • Smooth groove between discs to hold rope, belt, or chain

  • Center bore (through-hole) for shaft mounting (bore size customizable)

• Groove Design:

  • Optimized profile to reduce rope slippage and wear

  • Smooth inner surfaces to minimize friction during rotation

• Precision Fit:

  • Balanced geometry for stable rotation at high speeds

  • Tight dimensional tolerances for integration with other assemblies

Typical Applications

This pulley is suitable for a wide range of mechanical systems, including:

• Lifting devices (hoists, cranes, winches)

• Conveyor systems

• Fitness equipment (cable machines)

• Elevators and dumbwaiters

• Industrial automation

• Agricultural machinery

• Marine rigging systems

Its durable finish, precision groove, and load-bearing capacity make it ideal for both indoor and outdoor environments.

Manufacturing Capabilities

We offer full OEM CNC machining services for steel pulleys and transmission components:

➤ CNC Machining

• Multi-axis CNC milling and turning

• Tolerances: ±0.01 mm or better

• Balanced rotational parts with concentricity control

• Custom groove profiles (V-groove, U-groove, flat, multi-groove)

➤ Drilling & Boring

• Accurate center bore machining

• Chamfering, countersinking, and keyway cutting (optional)

➤ Surface Finishing

• Black electrophoretic coating (e-coating)

  • Uniform film thickness

  • Excellent anti-corrosion performance

  • Environmentally friendly process

• Optional: zinc plating, powder coating, phosphate treatment

➤ Assembly & Support

• Pulley with bearing assembly

• Shaft keyways, set screws, or bushing integration

• Labeling or laser engraving on request

Quality Assurance

We follow strict ISO 9001:2015 certified processes with:

• CMM and concentricity inspection

• Go/No-Go gauges for shaft bores and threads

• Coating thickness and adhesion testing

• Full documentation, including material certs and inspection reports

Customization Options

We provide custom design and OEM production tailored to your system:

• Groove shape and depth customization (for chain, rope, belt)

• Bore diameter, tolerance, and surface finish options

• Flange diameter and thickness according to load requirements

• Integrated bushings, bearings, or fastening holes

• Engraved logos, serial numbers, or part IDs

Why Choose Us

• Over 20 years of experience in CNC pulley and transmission part manufacturing

• Specialization in load-bearing and rotating components

• Flexible order quantities from prototype to mass production

• Rapid sampling and consistent lead times

• Engineering support from design review to full-scale production

Contact Us

Looking for a reliable and high-precision steel pulley manufacturer?

Get in touch today for:

• Fast quotes (within 24 hours)

• Technical advice or design optimization

• Sample orders or batch manufacturing

• Export-ready documentation and global delivery

Let us help you power your motion systems with precision-engineered pulleys.