High-strength bolts are critical components in industries such as bridge construction, steel structures, wind power equipment, mining machinery, and large industrial projects.

As infrastructure development continues to grow, manufacturers are facing increasing demand for:

• larger diameter bolts

• higher strength fasteners

• more reliable thread quality

• stable mass production capability

A Russian steel manufacturer recently upgraded its production capability by installing a 650 kN hydraulic thread rolling machine to manufacture high-strength threaded components for demanding engineering applications.

Customer Background: Demand for Large High-Strength Fasteners

In 2025, a steel manufacturing company from St. Petersburg, Russia contacted us.

The company specializes in producing:

• bridge connection bolts

• structural steel fasteners

• heavy-duty threaded components

• customized fasteners for large engineering projects

With increasing orders from infrastructure and industrial customers, the company needed to improve its internal production capability.

However, their existing equipment faced limitations when processing high-strength steel materials.

Production Challenge: Insufficient Rolling Force for High Hardness Materials

Before purchasing the hydraulic thread rolling machine, the customer experienced several production problems.

1. Insufficient Rolling Pressure

When processing high-strength steel and large diameter workpieces, conventional equipment often struggled to provide enough forming force.

This resulted in:

• incomplete thread profiles

• unstable thread dimensions

• inconsistent product quality

2. Limited Capability for Large Thread Sizes

The customer required equipment capable of producing:

• large diameter threads

• large pitch threads

• high-strength fasteners

Traditional machines could not consistently meet these requirements.

3. Dependence on External Suppliers

Some oversized threaded components had to be outsourced to third-party suppliers.

This increased:

• production lead time

• manufacturing costs

• supply chain uncertainty

The company needed a reliable solution to bring more production in-house.

Solution: 650 kN Hydraulic Thread Rolling Machine

After analyzing the customer's requirements, we recommended a 650 kN hydraulic thread rolling machine.

The machine was selected because of its:

• high rolling force capacity

• strong hydraulic drive system

• stable operation under heavy loads

• ability to process high-strength steel materials

Compared with conventional mechanical thread rolling equipment, hydraulic thread rolling machines provide greater forming force and better control when producing large and difficult-to-process threads.

Applications of the 650 kN Hydraulic Thread Rolling Machine

The equipment is especially suitable for manufacturing:

Bridge Construction Bolts

Bridge bolts require:

• high strength

• excellent fatigue resistance

• stable thread accuracy

Rolled threads provide better mechanical properties compared with traditional cutting threads because the material fibers remain continuous.

Wind Turbine Bolts

Wind turbine fasteners operate under:

• heavy loads

• repeated vibration

• changing environmental conditions

High-quality rolled threads help improve reliability and service life.

Mining Equipment Connectors

Mining machinery requires large fasteners capable of handling:

• impact loads

• high stress conditions

• harsh working environments

Heavy-duty thread rolling machines are suitable for producing these components.

Manufacturing and Testing Process

Before delivery, the hydraulic thread rolling machine was customized according to the customer's production requirements.

The machine underwent multiple inspection procedures, including:

Machine Performance Testing

Checking:

• hydraulic system stability

• rolling pressure accuracy

• operating performance

Thread Quality Testing

Finished workpieces were inspected for:

• thread accuracy

• surface finish

• dimensional consistency

The test results confirmed that the produced threads met the customer's technical requirements.

Production Results After Installation

After the 650 kN hydraulic thread rolling machine was put into operation, the customer achieved significant improvements.

Production Efficiency Increased by More Than 40%

The new equipment allowed the company to:

• shorten production time

• reduce outsourcing requirements

• improve delivery capability

Internal Production Capability Improved

Previously, some large threaded components needed to be purchased from external suppliers.

After installation:

• more products could be manufactured internally

• production scheduling became more flexible

• delivery time was reduced

Improved Thread Performance

Compared with cut threads, rolled threads provide advantages including:

• higher fatigue resistance

• improved surface hardness

• better surface finish

• stronger thread performance

These advantages are especially important for high-strength bolts used in critical engineering projects.

Customer Feedback

The customer commented:

“The 650 kN hydraulic thread rolling machine solved our long-term challenge of producing large high-strength bolts. The equipment operates reliably and helps us take on more engineering projects.”

Following successful operation, the customer included hydraulic thread rolling machines in its long-term equipment purchasing plan and is preparing to expand its high-strength fastener production capacity.

Why Choose a Hydraulic Thread Rolling Machine for Large Bolts?

For manufacturers producing large and high-strength fasteners, hydraulic thread rolling machines offer several advantages:

Higher Forming Force

Hydraulic systems can provide greater rolling pressure for:

• large diameter bolts

• high hardness materials

• difficult thread profiles

Better Thread Quality

Thread rolling creates threads through material deformation instead of cutting.

Benefits include:

• stronger thread structure

• improved surface quality

• longer fatigue life

Stable Mass Production

A properly configured hydraulic thread rolling machine can provide:

• consistent thread accuracy

• repeatable production quality

• reduced material waste

Frequently Asked Questions

Q1: What materials can a 650 kN hydraulic thread rolling machine process?

A 650 kN hydraulic thread rolling machine is commonly used for high-strength steel, alloy steel, and other materials requiring high forming pressure.

Q2: What products can be made with a heavy-duty thread rolling machine?

Typical applications include:

• high-strength bolts

• bridge bolts

• anchor bolts

• wind turbine bolts

• mining equipment fasteners

• industrial threaded components

Q3: Why use thread rolling instead of thread cutting for high-strength bolts?

Thread rolling improves thread strength because it forms the thread through plastic deformation while maintaining the material's fiber structure.

Advantages include:

• higher fatigue resistance

• better surface finish

• improved durability

Q4: How do I select the correct hydraulic thread rolling machine?

Selection depends on:

• workpiece diameter

• thread type

• material hardness

• required rolling force

• production volume

Large engineering bolts usually require machines with higher rolling force capacity.

Conclusion

The installation of a 650 kN hydraulic thread rolling machine helped this Russian steel manufacturer overcome limitations in high-strength bolt production.

By increasing rolling force capacity and improving thread quality control, the company achieved:

• higher production efficiency

• reduced dependence on suppliers

• improved manufacturing flexibility

For manufacturers producing large bolts and heavy-duty fasteners, selecting the correct hydraulic thread rolling equipment is essential for maintaining competitive production capability.