The 80 ton C-frame press, which is the sharpest line of transition to the "heavyweight" class in the metalworking and manufacturing sector, goes beyond being an ordinary workshop machine and forms the heart of integrated production lines. These machines, which not only apply a strong pressing force but also work with a zero-defect principle in heavy tonnage sheet cutting, forming, and complex sheet bending operations, are the number one choice in the production of automotive chassis side members, white goods exterior panels, and defense industry components.

As Karmaksan Machine, we have been taking traditional press logic one step further since 1988, designing our 80-ton capacity machines to be fully integrated into Industry 4.0 and factory automation systems. Going beyond standard cutting, we offer our customers a perfect balance of ram structure and motor torque even in the deep drawing press operations where businesses struggle the most.

Progressive Dies and Full Automation Compatibility

The era of obtaining a single piece with a single stroke in modern industry is rapidly closing. Now, the coil sheet entering from one end of the die must be punched, bent, and formed simultaneously inside the machine and come out from the other end as a finished product. The molds that perform these complex operations are called "progressive dies." Our 80-ton workbenches are designed as a complete progressive die press. Thanks to the expanded T-slotted work table, you can easily mount your meters-long molds at once.

We do not only attach molds, but we can easily couple our machine to coil unwinders, straighteners, and automatic feeder press lines. Our advanced PLC screens process the signals coming from the driver systems instantly, synchronizing the driving of the sheet into the die with millimetric steps. Thanks to this top-level eccentric press automation, the production speed in your factory multiplies while your scrap rates drop to almost zero.

Double Pitman Architecture and Ram Balancing

As the tonnage increases and the die area expands, the load on the press ram begins to move away from the center. In standard single-pitman machines, heavy pressures applied to the corners of the die disrupt the balance of the ram over time and cause the guides to wear out. Karmaksan engineering successfully applies the double pitman press infrastructure at a critical stage like 80 tons, depending on customer demand and die width. Distributing the power equally to the ram surface from two different points makes axial shifting (offset loading) impossible.

In addition, the ram balancing cylinders (pneumatic balance cylinders) we have integrated into the system to take the extra load that the heavier ram mass puts on the crankshaft enable the machine to work much more vibration-free, silently, and by drawing lower motor current. These cylinders directly double the life of the brake system.

Unshakeable Body: Vibration Damping Technology

The impact of an 80-ton force hitting the mold more than 50 times a minute creates a severe seismic vibration on the floor and the machine body. If your machine cannot dampen this vibration correctly, the angles in your industrial metal bending processes will constantly deviate. Karmaksan 80-ton models are produced with a steel construction body (C-frame) welded from extra-thick sheets, whose stress has been relieved by special processes, instead of standard casting. The machine literally locks itself to the ground, absorbs the vibration within itself, and does not reflect it onto the mold.

Outstanding Technical Equipment of Our 80-Ton Models

• Advanced Pneumatic Clutch (Clutch/Brake): Air pressure clutch that stops heavy tonnage instantly with millisecond response time and fully meets CE (European) occupational safety norms.
• PLC Supported Smart Panel: Central touch brain where you can manage production quantity, fault detection, maintenance time warnings, and driver integrations from a single screen.
• Central Automatic Lubrication Unit: A system that automatically lubricates all moving parts in millimetric doses, including double connecting rods, crankshaft, and prismatic V-guides.
• Hydraulic Fuse (Overload Protection): Hydraulic safety fuse that instantly relieves pressure in case of incorrect sheet feeding, preventing the breaking of the machine and your mold worth millions.

Revision and Modernization in Heavy Tonnage Presses

Machines of 80 tons and above are among the most expensive investments of a factory. If you have an old machine with a mechanical clutch, constantly breaking down or not getting approval from occupational safety inspectors, scrapping it should be your last option. As Karmaksan, we provide brand-independent professional revision services for the entire heavy industry machinery park.

We dismantle your old mechanical presses, grind their bearings, renew their crankshafts, and most importantly, we integrate new generation pneumatic clutches and PLC safety automation into your machine. With press revision costs that are highly economical compared to purchasing a new machine, we restore your old workbench to a performance that complies with current occupational health laws and is far superior to its initial efficiency.

To have a detailed technical discussion about our 80-ton eccentric presses that will add automation power to your production and extend the life of your molds, and about our advantageous direct manufacturing prices, you can visit our contact page. Also, by writing to us from the WhatsApp button in the lower right corner of the page, you can immediately request a quote for factory-specific automation solutions.