About TONG DA

TONG DA PRECISION ENTERPRISE CO., LTD. was established in 1989 and has been deeply engaged in the fields of metal tube processing and special-purpose machinery manufacturing for decades.


We specialize in the research, design, manufacturing, and sales of equipment for metal tube sealing, capping, tube end forming, tube cutting, rotary cutting, grooving, beading, as well as various types of custom tube processing machinery.


With years of hands-on manufacturing experience and technical expertise, TONG DA has grown into a professional manufacturer with strengths in both tube processing and machinery development.


Our services include standard machines, customized special-purpose machines, OEM processing, and production process planning. We are committed to providing customers with stable, efficient, and industry-oriented total solutions.



Development History

In its early years, TONG DA mainly focused on steel tube OEM manufacturing and processing, primarily serving the production of bicycle tube components and fan tube components.


As market demand and industrial conditions evolved, TONG DA expanded its business based on its strong foundation in metal tube manufacturing and established two core divisions:

● Tube Machinery and Special-Purpose Machine Design & Manufacturing Division

● Special Tube Components and Metal Hardware OEM Processing Division


This development has enabled TONG DA not only to build strong machinery design capabilities, but also to apply practical processing experience to better understand customer requirements in terms of materials, dimensions, tolerances, production efficiency, and product consistency.


As a result, we are able to provide solutions that are more aligned with actual production conditions.



Core Technologies and Equipment Development

Through continuous investment in research and development, TONG DA has successfully developed a range of professional machines for high-quality and high-precision metal tube processing.


Key Equipment Developed by TONG DA

● High-speed pneumatic round tube rotary cutting machines

● Hydraulic tube roll grooving and beading machines

● Flat-type hydraulic metal tube sealing machines

● Arc-type hydraulic metal tube capping machines

● Various tube end forming machines

● Customized special-purpose equipment


Flat-Type Hydraulic Metal Tube Sealing Machine

The flat-type hydraulic metal tube sealing machine is one of TONG DA’s signature products.

At the time of its introduction, this machine transformed traditional tube end processing methods and brought greater process innovation and production stability to the market.


Arc-Type Hydraulic Metal Tube Capping Machine

Building on this technology, TONG DA further developed the arc-type hydraulic metal tube capping machine; several of our machines have since been patented in Taiwan and abroad.

This achievement reflects our continued innovation and technical advancement in the field of metal tube end forming equipment.



Products and Services

Machinery Design and Equipment Manufacturing

TONG DA’s main products include:

● Metal tube sealing machines and capping machines

● Steel tube sealing machines and end sealing machines

● Tube end forming machines

● Tube cutting machines

● Rotary cutting machines

● Grooving machines

● Beading machines

● Customized automation equipment


Based on customers’ product requirements, material characteristics, processing dimensions, and production flow, TONG DA provides machine selection recommendations and customized planning to help customers build more efficient production processes.


Metal Tube OEM Processing Services

In addition to machinery manufacturing, TONG DA also provides metal tube processing services, including:

● Tube cutting

● Flattening

● Punching

● Notch punching

● Tube sealing

● Tube capping

● End sealing

● Tube bending

● Special-shaped tube processing


By combining machinery expertise with practical processing experience, TONG DA is able to understand customer needs more comprehensively and provide integrated support from processing services to equipment implementation.



Application Industries

TONG DA’s machinery and processing technologies are widely applied across various industries and product fields, including:


1. Automotive and Motorcycle Applications

Tailgate struts | Gas springs | Gas lift rods | Hydraulic support rods | Shock absorbers | Airbag-related components | Automotive parts | Motorcycle parts


2. Consumer Products and Household Hardware Applications

Baby strollers | Beach chairs | Lounge chairs | Furniture hardware | Sanitary ware equipment


3. Industrial and Functional Product Applications

Fitness equipment | Cold sealing-related applications | Tube processing for welding and assembly


4. Medical and Special-Purpose Applications

Medical devices


TONG DA understands that different industries have different requirements for precision, strength, appearance consistency, and mass production efficiency in metal tube components.


Therefore, we are able to provide more accurate equipment recommendations and processing solutions based on each specific application.



Technical Advantages

TONG DA’s core competitiveness is built on decades of practical experience, strong technical integration capabilities, and reliable equipment quality.


1. Strong Foundation in Tube Processing

TONG DA started with real-world manufacturing and processing operations. This gives us a deep understanding of the details and challenges involved in metal tube production, allowing us to design equipment that better fits actual factory needs.


2. Independent R&D and Patented Technologies

TONG DA continues to invest in machinery research and development and has successfully developed patented sealing and capping equipment with strong market differentiation, demonstrating our technical strength.


3. Customized Equipment Capabilities

In addition to standard models, TONG DA can provide customized special-purpose machines and automation integration solutions based on customers’ workpiece characteristics, production flow, and capacity requirements.


4. Stable and Durable Equipment Quality

The first machine TONG DA built for a customer more than ten years ago is still operating today. This not only demonstrates the durability of our equipment, but also reflects our commitment to manufacturing quality and long-term customer value.


5. International Market Experience

TONG DA has manufactured a wide range of machines and exported them to more than 20 countries, accumulating extensive experience across different industries and proving our ability to serve both domestic and international customers.



Current Machine Range

  • Tube end closing machines: TD-31040 three-station, TD-31050 two-station, TD-311 automatic feeding, TD-31050 for shock absorbers, TD-21025 flat type
  • NC servo closing machine: TD-382, with the closed-end shape set by program – for mixed production and hollow stabilizer bars and torsion beams
  • Inner grooving machines: TD-627 servo and TD-61530 hydraulic, for oil grooves inside gas spring and shock absorber cylinders
  • Gas spring assembly: TD-YL506 oil filling, TD-AT155 / TD-724 press-fit & edge folding, TD-91528 lock nut, TD-738 edge folding & punching
  • Roll grooving, cutting and reducing: TD-41860, TD-42815, TD-41335, TD-42001 custom, TD-876 reducing
  • Services: contract tube processing and PLC programming / machine retrofits

See all machines on our product pages.


Certification and Markets

TONG DA machines are CE certified and sold to the USA, Germany, Turkey, the UK, India, China and other countries.


Contact



Business Philosophy

TONG DA has always upheld the values of quality, technology, integrity, and service.


Starting from the actual needs of our customers, we continuously improve machine performance and processing technologies to help customers enhance production efficiency, process stability, and product competitiveness.


We believe that truly valuable equipment is not only able to operate properly at the time of delivery, but more importantly, can continue running reliably over the long term and create lasting value for our customers.


Looking ahead, TONG DA will continue to focus on metal tube processing and special-purpose machinery manufacturing, moving toward higher efficiency, greater stability, and stronger customization capabilities, with the goal of becoming a long-term and trusted partner for our customers.



＊TONG DA reserves the right to modify technical data, design, end of delivery, color, materials, specifications and models.

Equipment Design and Manufacturing Equipment Design and Manufacturing

TONG DA designs and builds tube processing machines and custom special-purpose machines in-house in Tainan – mechanics, hydraulics, servo and PLC controls, and tooling. Every model is first used in volume on our own contract production line before it is delivered to customers.

Tube end closing machines (round-end, flat-end, CNC servo) | Inner grooving machines (servo, hydraulic) | Roll grooving machines | Tube reducing machines | Tube cutting machines | Press-fit & edge folding machines | Lock nut machines | Oil filling machines | Special-purpose machines | PLC programming & machine retrofits

See all machines

Metal Tube Processing Services Metal Tube Processing Services

As both a machine builder and a contract processor, TONG DA processes steel, stainless, aluminium and copper tubes on its own machines. When volume does not yet justify a machine, a new product needs trial runs, or your line is missing one operation, start with contract processing and decide on a machine later.

Cutting to length | End closing with or without a hole | Roll grooving & beading | Inner grooving | Reducing & tapering | Notching & punching | Flattening & oval forming | Bending

About our contract tube processing

Application Industries Application Industries

TONG DA machines and contract services are used for tubes in automotive parts, consumer products and industrial equipment. Our machines are CE certified and sold to the USA, Germany, Spain, the UK, Turkey, India, Brazil, Thailand, Japan, Korea, China and more.

Gas springs, tailgate struts & gas lifts | Shock absorbers & dampers | Stabilizer bars, torsion beams & torsion bars | Heat pipes & heat exchangers | Airbag tubes | Furniture, strollers & outdoor chairs | Motorcycle frames | Wheelchairs, crutches & mobility aids | Fitness equipment & conveyor rollers

Read our technical articles

COMPANY HISTORY

  • 2026

  • Developed a servo special-purpose machine for a European spring maker.

  • 2025

  • Renewed CE certification to the latest standard; filed multiple patents in China.

  • 2022

  • Our CNC servo machines began serving more customers overseas, and servo-controlled models became our main export line.

  • 2020

  • Helped a Japanese automotive maker develop closing equipment for suspension stabilizer bars (torsion bars); the TD-382 CNC servo tube closing machine was delivered. Its closing path is program-controlled, and we have since supplied the group's overseas plants and continue to provide servo slides and hydraulic modules as spares.

  • 2018

  • Developed integrated automatic tube end forming machines that combine several end operations – such as cutting, grooving, reducing and closing – in one machine, reducing handling and labour.

  • 2016

  • Developed a range of tailgate strut cylinder and assembly machines; helped a Middle East heat exchanger maker with tube end closing.

  • 2015

  • A stroller frame production line adopted the TD-21025 flat-end tube closing machine, replacing plastic plugs with a flat, safe tube end.

  • 2013

  • Integrated robot arms for fully automatic loading and unloading to raise production efficiency; tube end closing for motorcycle frames.

  • 2012

  • Filed a patent in China.

  • 2011

  • Filed a patent for forming oil grooves inside gas spring cylinders; supported airbag tube development.

  • 2008

  • Applied our tube closing technology to tailgate strut and gas spring cylinders and entered the gas spring machine field, exporting to the USA, Germany, Spain, Turkey, Brazil and Thailand.

  • 2007

  • Filed a Taiwan patent; built tube closing equipment for a European gas spring plant.

  • 2006

  • Filed a Taiwan patent.

  • 2004

  • Obtained CE marking to meet international and EU machinery safety requirements, laying the groundwork for exports to Europe and the Americas.

  • 2002

  • Began long-term supply of tube closing equipment and consumables to a stroller maker – a partnership of more than twenty years.

  • 2000

  • Invented the round-end hydraulic tube closing machine, which cold-spins the tube end closed in one piece with no heating and no welding, for tailgate struts, gas springs, airbags, strollers and furniture; filed patents in Taiwan and China.

  • 1991

  • Invented the flat-end hydraulic tube closing machine, which spins the tube end flat at room temperature to replace plastic plugs and welding, for strollers, lounge chairs and similar products.

  • 1990

  • Invented a high-speed pneumatic tube roll cutting machine that parts tubes with a cutting wheel, leaving no chips.

  • 1989

  • TONG DA was founded in Annan District, Tainan, starting with steel tube OEM and tube processing. We still run contract processing on our own machines today, so machine design and production experience support each other.

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