Our Crankshaft grinders by Robbi are used for grinding journals and crank pins to remove material and refurbish this vital engine part and expensive-to-replace unit. Usually done when rebuilding an engine, crankshaft grinding also improves engine performance.
In every high-functioning engine is a finely crafted crankshaft. Through the connecting rods, the crankshaft transfers power from the piston movement from linear to rotational. This harnessed power is used by most conventional cars, diesel marine engines, locomotive internal combustion engines, large compressors, and other heavy-duty machinery.
Our crankshaft grinders are suitable for single-piece runs and for production lots.
Robbi Crankshaft Grinders
Robbi offers a line of crankshaft grinders that includes their heavy-duty industrial line. These machines are designed for high accuracy and efficient operations using workheads with 4-way cross-slides and an advanced locking system for quick crankshaft centering.
With lifetime superior accuracy and dependability, these one-piece cast iron constructed machines also deliver various configurable options to make the machine tool work best for how you need it.
- Wheel Head: The wheel head is coated with anti-friction material and bathed in adjustable bearings to allow free movement and minimize wear on the machine
- Hydraulic Controls: Increase setup and grinding speed with the rapid hydraulic wheel head and table.
- Work Heads: With only two keys for all shifting, centering, and clamping operations indexed chucks easily change from chucks to centers and rotate 360 degrees.
Standard Line of Crankshaft Grinders
Ecotech Machine Tool offers four convention crankshaft grinding machines.
Industrial Line of Crankshaft Grinding Machines
We also offer four industrial line machines, with an option for CNC in the Rex 400 machine model.
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General Information
About The Robbi Group
Robbi is an industrial machine manufacturer based out of Italy and since 1936. Robbi uses materials and high-quality components to deliver the utmost precision. Most of their mechanical components are created in their machine shop.
Their company mission is to design and manufacture precision machine tools, technologically advanced, reliable, safe, easy to use, and “tailor-made” for each customer.
Frequently Asked Questions
What are the primary benefits of using Robbi Rex crankshaft grinders?
These machines utilize a heavy-duty, one-piece cast iron construction to ensure lifetime accuracy and dependability. Efficiency is maximized through work heads featuring 4-way cross slides and an advanced locking system, allowing for rapid and precise crankshaft centering. Additionally, anti-friction sideways and oil-bathed precision bearings minimize mechanical wear.
Which crankshaft models are available for industrial and semi-automatic operations?
The product line ranges from the compact Rex 1200 to the large-scale Rex 6000. While the standard series includes models like the Rex 1500 and 1800, the industrial models, specifically the Rex 2700 and Rex 3100, can be configured as semi-automatic versions featuring Siemens touch screen control panels for intuitive programming.
What is the maximum workpiece capacity for the Robbi Rex series?
Capacity varies significantly across the range to accommodate different engine sizes. The distance between centers starts at 1320 mm for the Rex 1200 and extends up to 6000 mm for the Rex 6000. Grinding diameters range from 180 mm on smaller units to 500 mm on heavy-duty industrial models.
What standard equipment is included with a Robbi Rex grinding machine?
Each machine is supplied with a comprehensive kit for immediate operation, including two self-centering chucks, a cooling installation with a tank, and a set of steel splash guards. Essential precision tools are also provided, such as a V-square for centering crankpins, an eccentricity control device, and a wheel balancing mandrel.
How does the semi-automatic system improve the grinding process?
The semi-automatic versions utilize a Siemens TP 700 operator panel to program plunge and pass rectification cycles parametrically. The system includes automatic stop functionality at programmed quotas and grinding wheel dressing with automatic compensation. Optional direct-reading systems allow for real-time work quota monitoring and progress control via in-process measuring devices.
What customization and support services does Ecotech Machine Tool provide?
We specialize in tailor-made solutions, offering initial consultancy to optimize the machine for specific production processes. Support includes tailored operational and maintenance training, a dedicated spare parts program for both current and older models, and teleassistance for CNC machines to provide real-time programming support and troubleshooting.
Machine Model Technical Comparison Chart
| Model | Distance Between Centers | Height of Centers Over Table | |
|---|---|---|---|
Rex 1500 |  | ||
Rex 1800 |  | ||
Rex 1800 RM | | ||
Rex 2200 L |  | ||
Rex 2200 RM | | ||
Rex 3100 |  | ||
Rex 4000 CNC |  | ||
Rex 6000 |  |
