Connecting rod machining

Precision That Sets Standards

Reliable connecting rod machining, from breaking off to fine boring in the micrometer range.
The right solution for every geometry and every material.

engineered to meet
the highest standards
Decades of experience, worldwide in use
The connecting rod is one of the components in the powertrain that is subjected to the highest stresses. This makes the manufacturer all the more important. With decades of experience in connecting rod machining, we supply machines that are used worldwide by leading automotive manufacturers—precise, cost-effective, and reliable in every production run. From breaking-off and fine boring to complete machining, we provide the right solution—from flexible small-batch production to high-productivity manufacturing lines.

By the way: Our machining centers aren’t just for connecting rods. We also offer customized solutions for machining a wide variety of components.

Our Approach

Your requirements set the pace. We analyze your process and product variety in detail and use this information to develop a production line that’s tailored exactly to your needs.
From the initial proposal through design to commissioning, we support you with a dedicated point of contact. Streamlined processes, clear communication, and in-depth process knowledge ensure that your system runs on schedule and quickly becomes productive.

Cracking and assembly modules

Our cracking and assembly modules are designed for breaking and assembling connecting rods in small and medium production runs. Their modular design allows for a freely configurable process sequence, using the same proven technologies found in our fully automatic rotary transfer machines. The breaking unit is the key factor in determining quality: With our high-speed breaking unit, we find the right solution for every connecting rod geometry and every material. Process monitoring can be integrated as an option.

Rotary table machines

When short cycle times and high-volume production are required, our rotary table machines are the right choice. Each machine is custom-designed for your specific process sequence, featuring modular machining units with horizontal, vertical, or inclined spindle configurations. The loading concept, which operates in parallel with active machining time, ensures short cycle times with consistently high quality while optimizing floor space requirements.

AF 400 Fine boring machine

The AF 400 is designed specifically for the semi-finishing and finishing of connecting rods. Non-overlapping feed axes and a compact axis layout without overhanging masses ensure the highest precision. Even oval and trumpet-shaped bores can be machined with freely programmable geometry. Thanks to the clamping cube concept, you can machine up to four different workpiece types without retooling—quickly, flexibly, and cost-effectively.

AC 400 Machining center

The AC 400 is a machining center with 2, 3, 4, or 5 motorized spindles, automatic tool change, and a tool magazine. Spindles with NC face turning capabilities and additional spindle rows are available as options. This allows you to combine the flexibility of a machining center with the cost-effectiveness of a system specialized for connecting rods.

FAQ

Frequently Asked Questions

Can several workpiece types be processed on one machine?

Yes. Thanks to the clamping-cube concept, up to four different workpiece types can be processed on the AF 400 without retooling, saving time and increasing flexibility.

How is quality ensured during fracture splitting?

The splitting unit is the quality-determining element of every cracking machine. With our high-speed cracking unit and optionally integrated process monitoring, you keep an eye on the quality of every single cracking operation.

What makes AST's fine-boring technology special?

Our specially developed fine-boring spindles compensate for tool wear via an adjustment mechanism. This lets you achieve machining tolerances in the micrometer range, even for oval and trumpet-shaped bores with freely programmable geometry.

From what quantity is an AST system worthwhile?

From the flexible small batch to the highly productive production line, we deliver the right concept. For small and medium quantities, our manually loaded cracking and assembly modules are ideal; for large series, fully automatic lines.

Which connecting-rod materials can be processed?

Forged and sintered connecting rods. Forged ones receive their predetermined breaking point via a laser notch, sintered ones are cracked without a laser. For every connecting-rod geometry and material, we find the right solution.

Can AST machines only process connecting rods?

No. As an individual system solution, we handle the machining of the most varied components, from gearbox and clutch housings through cylinder heads to steering knuckles. On request, several workpiece types even run on the same system.

Can complete production lines be supplied as well?

Yes. Whether a single machine or a complete line: we deliver turnkey, from engineering and design through to commissioning. You receive a ready-to-operate system from a single source.