Large-scale infrastructure projects such as industrial parks, bridges, wind energy facilities, and steel structure buildings require thousands of high-strength anchor bolts.

As critical connection components in steel structures, anchor bolts must meet strict requirements for:

• thread accuracy

• mechanical strength

• dimensional consistency

• long-term durability

To meet growing demand for large diameter fasteners, a Russian structural fastener manufacturer upgraded its production capability with a Z28-250 large thread rolling machine.

Customer Background: Growing Demand for Large Anchor Bolts

In 2025, a steel structure fastener manufacturer located in the Moscow region found us.

The company specializes in producing:

• foundation anchor bolts

• structural steel bolts

• heavy-duty threaded components

Its products are widely used in:

• industrial construction projects

• bridge structures

• energy facilities

• large steel framework installation

The company mainly produced anchor bolts ranging from:

M24 to M60

With increasing orders from large engineering projects, the existing production equipment could no longer meet production requirements.

Production Challenges: Traditional Equipment Could Not Handle Large Bolts

Before upgrading the equipment, the customer experienced several difficulties when producing large diameter anchor bolts.

1. Limited Capability for Large Diameter Threads

The existing machines struggled with:

• large bolt diameters

• coarse thread pitches

• high-strength materials

Especially during periods of concentrated project deliveries, production pressure increased significantly.

2. Unstable Thread Quality

Common problems included:

• incomplete thread profiles

• poor dimensional accuracy

• inconsistent thread surface quality

These defects increased:

• inspection requirements

• rework costs

• delivery pressure

3. Low Production Efficiency

The existing equipment required longer processing time for large bolts.

Some large orders required multiple machines working simultaneously to complete production.

The customer needed a stronger and more efficient solution.

Solution: Z28-250 Heavy Duty Hydraulic Thread Rolling Machine

After analyzing the customer's production requirements, we recommended the Z28-250 hydraulic thread rolling machine.

The machine was designed for heavy-duty thread forming applications and is suitable for producing:

• large anchor bolts

• structural steel bolts

• wind turbine foundation bolts

• large engineering fasteners

Z28-250 Thread Rolling Machine Capabilities

The Z28-250 can process workpieces with:

• Diameter range: Φ6–60 mm

• Thread pitch range: 1–6 mm

Its high-capacity hydraulic system provides stable rolling pressure during the forming process.

Why Choose Thread Rolling for Large Anchor Bolts?

Compared with traditional thread cutting, thread rolling provides several advantages.

1. Higher Thread Strength

Thread rolling forms threads through metal deformation instead of removing material.

This helps maintain the continuous fiber structure of the metal.

Benefits include:

• improved fatigue resistance

• higher mechanical strength

• better durability

This is especially important for anchor bolts used in heavy engineering projects.

2. Better Surface Quality

Rolled threads provide:

• smoother thread surfaces

• lower surface defects

• improved contact performance

This also improves the performance of later processes such as:

• galvanizing

• anti-corrosion coating

3. Higher Production Efficiency

For large-volume bolt production, thread rolling provides:

• faster processing cycles

• lower material waste

• more stable production quality

Customized Production and Factory Testing

To meet the customer's requirements, several preparations were completed before shipment.

Local Electrical Standard Adaptation

The equipment was configured according to Russian market requirements.

Adjustments included:

• electrical system compatibility

• machine configuration optimization

Sample Production Testing

Before delivery:

• customer samples were produced

• thread dimensions were inspected

• machine performance was tested

The testing confirmed that the finished bolts met the required thread specifications.

Continuous Operation Testing

The machine underwent long-duration operation testing to verify:

• hydraulic system stability

• rolling pressure consistency

• continuous production capability

Production Results After Installation

After commissioning, the customer achieved significant improvements.

Production Efficiency Increased by Approximately 45%

The new Z28-250 machine allowed the company to:

• shorten processing time

• improve production scheduling

• handle larger orders more efficiently

Product Qualification Rate Exceeded 99%

The improved machine stability resulted in:

• more consistent thread accuracy

• fewer defective products

• reduced rework

One Machine Replaced Multiple Production Steps

Previously, some large orders required two machines to complete.

After upgrading:

• one Z28-250 machine could independently complete the production requirements

This significantly improved production flexibility.

Customer Feedback

A customer representative commented:

“This equipment helped us successfully complete several large steel structure projects. Especially for wind energy projects, the production efficiency of large diameter bolts improved significantly. The machine operates reliably and has low maintenance costs.”

The company is now planning to add another large thread rolling machine to expand its production capacity for:

• wind power projects

• bridge construction

• industrial infrastructure

Applications of Z28-250 Large Thread Rolling Machine

The Z28-250 is suitable for manufacturing:

Construction Industry

• foundation anchor bolts

• steel structure bolts

• building connection bolts

Wind Energy Industry

• wind turbine foundation bolts

• tower connection fasteners

Heavy Engineering

• bridge bolts

• mining equipment fasteners

• industrial machinery components

Frequently Asked Questions

Q1: What bolts can a Z28-250 thread rolling machine produce?

The Z28-250 is suitable for producing:

• anchor bolts

• structural bolts

• large diameter threaded rods

• engineering fasteners

It is commonly used for bolt sizes up to approximately M60 depending on material and thread specifications.

Q2: Why use a large thread rolling machine for anchor bolts?

Large anchor bolts require high strength and stable thread quality.

A heavy-duty thread rolling machine provides:

• higher forming force

• better thread strength

• improved production consistency

Q3: What is the difference between thread rolling and thread cutting?

Thread rolling forms threads by material displacement, while thread cutting removes material.

Thread rolling generally provides:

• stronger threads

• better fatigue resistance

• smoother surfaces

• higher production efficiency

Q4: What industries need large diameter thread rolling machines?

Common industries include:

• wind power

• bridge construction

• steel structures

• oil and gas

• heavy equipment manufacturing

Q5: How do I choose the right thread rolling machine for large bolts?

Selection depends on:

• bolt diameter

• material strength

• thread pitch

• production volume

• required rolling force

Large engineering bolts usually require hydraulic machines with higher capacity.

Conclusion

By introducing the Z28-250 heavy-duty thread rolling machine, this Russian anchor bolt manufacturer successfully upgraded its production capability.

The equipment helped achieve:

• 45% higher production efficiency

• over 99% product qualification rate

• improved thread quality

• reduced production dependence on multiple machines

For manufacturers producing large anchor bolts and structural fasteners, selecting the right large thread rolling machine is essential for improving production efficiency and meeting demanding engineering requirements.