In hydraulic and pneumatic systems, the reliability of a tube fitting connection depends heavily on the quality of ferrule pre-assembly. Whether you work in a fixed workshop or perform field maintenance, choosing the right pre-assembly tool is critical. Kuncheng offers two distinctly different solutions: the KC-A01 Electric Cutting Ring Pre-assembly Flaring Machine and the KC-A02 Manual Cutting Ring Pre-assembly Flaring Machine. Both process steel tubes with outside diameters from 6 mm to 42 mm, yet they serve different operating environments and user needs. Understanding each one's strengths helps you make an informed decision that maximizes efficiency, quality, and cost-effectiveness.
For manufacturers with stable power supply who need consistent, high-speed output, the KC-A01 electric ferrule pre-assembly machine is the ideal choice. This electro-hydraulic unit combines pre-assembly and flaring functions in one device, significantly reducing labor time and human error compared with manual work. Its hydraulic unit, driven by a 380 V / 50 Hz power supply, delivers repeatable and precise pre-assembly results. The machine is equipped with a pressure gauge and a pressure-adjustment knob, allowing the operator to fine-tune pressure based on tube material and diameter. For softer materials such as copper tubing, pressure can be lowered appropriately to prevent deformation.
High-volume production lines that need to pre-assemble hundreds of fittings every day.
Workshops with skilled operators who can switch quickly between tube diameters by manually changing the pre-assembly dies (sleeve and backstop).
Applications demanding high consistency, such as automotive, aerospace, and industrial machinery hydraulic systems.
Specifications: Weight 65 kg · Dimensions 54 × 49 × 26 cm · Bench-top footprint · One-button start · Sleeves made of imported die steel with backstops featuring relief grooves for long service life and reliable performance.
When the job site moves away from the workshop — construction sites, shipyards, remote pipeline repairs, or any environment without reliable power — the KC-A02 manual ferrule pre-assembly machine becomes indispensable. This portable unit integrates the hydraulic power unit with a manual pump, requiring no external power source. At only 35 kg and 35 × 72 × 31 cm, it easily fits in a vehicle or a toolbox.
KC-A02 fills the gap between traditional bench-vise manual pre-assembly tools and the electric KC-A01. Compared with purely hand-tightening, it greatly reduces physical effort — especially for large-diameter steel tubes (up to 42 mm) — while delivering pre-assembly quality comparable to the electric unit. The manual pump lets the operator control pressure step by step, ensuring the ferrule seats correctly without over-tightening. This is particularly valuable in field repairs where a torque wrench may not be available.
Emergency repairs of hydraulic systems in mining, agricultural, or construction equipment.
Hydraulic pipeline installation on ships and offshore platforms where power outlets are scarce.
Small-batch, multi-variety, mobile work where flexibility and portability matter more than raw single-cycle speed.
Training in vocational schools, where students can learn the basics of ferrule pre-assembly with no electrical hazard.
Both machines share the same die system (sleeve and backstop) and are compatible with standard 24° compression-fitting ferrule dies. They also support 37° flaring — simply fit the corresponding flaring die block and flaring die.
Power availability: With stable 380 V power, KC-A01 delivers higher productivity; without it, KC-A02 is the only option.
Volume demand: For highly repetitive, large-batch tasks, the electric unit's automatic cycle saves time and reduces operator fatigue; for occasional or field work, the manual unit is more cost-effective.
Portability: KC-A02's lightweight design and cord-free operation make it the first choice for mobile service teams.
Kuncheng's KC-A01 and KC-A02 are not competitors but complementary tools that together cover the full spectrum of ferrule pre-assembly needs. By understanding the specific scenarios each excels in, you can optimize your hydraulic tube-processing workflow — whether in a fixed workshop or out in the field. Both machines uphold Kuncheng's commitment to quality, using imported die steel and professional heat treatment to ensure durability and precision.
