HB OPT | Precision Transmission Components & Custom Machined Parts

About HB OPT

HB OPT is a leading manufacturer of precision transmission components with over 20 years of experience in custom design and industrial part production. Based in Shijiazhuang, China, we serve clients across the globe with high-quality, cost-effective solutions for power transmission systems.

330+ Employees

Including 20 engineers and 25 QC specialists

In-House Manufacturing

All processes from casting to finishing

Strong Casting Capacity

3 melting furnaces, 2 sand molding lines, 1 lost foam line

Competitive Pricing

High-level quality at mid-level prices

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Our Product Range

From standard pulleys to fully customized transmission components, HB OPT delivers precision-engineered parts for diverse industrial applications.

Taper Bore V-Belt Pulleys

Available in SPZ, SPA, SPB, SPC series. Ideal for high-torque transmission with easy installation.

• Steel & Cast Iron options
• Taper bore with locking device
• Precision balanced

HTD Taper Bore Timing Pulleys

5M, 8M, 14M pitch options. Designed for synchronous drive systems.

• HTD 3M to HTD 20M
• Taper bore for secure fit
• High wear resistance

Stock Bore V-Belt Pulleys

Ready-to-install pulleys in SPZ, SPA, SPB, SPC profiles.

• Standard bore sizes
• High tensile strength
• Corrosion-resistant finish

Customized Components

CNC-machined parts from your drawings, models, or samples.

• CNC milling & turning
• Metals, plastics, composites
• One-off to high-volume

Taper Bore Sprockets

06B to 24B series. Perfect for chain drive systems requiring secure mounting.

• Taper bore with bushing
• High fatigue resistance
• Precision tooth profile

Motor Mountings & Rails

Adjustable motor bases and slider rails for alignment and tensioning.

• Heavy-duty construction
• Smooth linear motion
• Corrosion-protected

Locking Device Pulleys

Secure shaft connection without keyways. Ideal for frequent maintenance.

• No keyway stress
• Easy installation/removal
• High torque transmission

Pilot Bore Timing Pulleys

Precision pilot bore for accurate alignment in timing belt systems.

• HTD, STD, T series
• Balanced for high speed
• Durable surface finish

Shaft Couplings

Flexible and rigid couplings for power transmission alignment.

• Misalignment compensation
• High torsional stiffness
• Maintenance-free options

Agricultural Components

Durable parts designed for farm machinery and outdoor use.

• Weather-resistant
• High impact strength
• Extended service life

Finished Bore Sprockets

Ready-to-mount sprockets with precision bore finishing.

• Tight tolerance bore
• Keyed & keyless options
• High wear resistance

Multi-Wedged V-Belt Pulleys

Efficient power transfer with reduced slippage and compact design.

• High power density
• Low vibration
• Long belt life

View Full Catalog

Why Choose HB OPT?

We combine decades of engineering expertise with advanced manufacturing to deliver reliable, high-performance transmission components.

Quality Assured

25 dedicated QC personnel and full in-house inspection capabilities ensure every part meets strict standards.

Fast Delivery

Streamlined production and logistics ensure on-time delivery, even for custom orders.

Engineering Support

20 experienced engineers available to assist with design, selection, and optimization.

Cost-Effective

High-quality manufacturing at competitive prices due to efficient in-house processes.

Frequently Asked Questions

How do I select the right pulley for my application?

Start by determining the belt type (V-belt, timing belt), pitch diameter, number of grooves, and bore size. Our engineers can assist with selection based on your power transmission requirements.

Can you manufacture custom parts from my drawings?

Yes, we specialize in custom machining from customer-provided drawings, 3D models, or physical samples. We support CNC milling, turning, grinding, and drilling across various materials.

What materials do you work with?

We process steel, cast iron, aluminum, brass, plastics, and composite materials depending on application requirements for strength, weight, and corrosion resistance.

What is the lead time for custom orders?

Typical lead time is 15-30 days depending on complexity and quantity. We provide updates throughout production and can expedite when needed.

Do you provide quality certification?

Yes, we offer material certifications, dimensional inspection reports, and can comply with ISO or customer-specific quality documentation requirements.

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Precision Transmission Components for Industrial Excellence