United Grinding Technologies Inc.
The CT550 is a compact machine for mediumsized workpieces with up to three inline grinding spindles

Higher Precision for Internal Grinding, with Shorter Cycle Times

Oct. 31, 2012
Cylindrical grinding for medium-sized workpieces High-rigidity machine bed Small parts, tough materials

With the recent addition of the Studer CT internal cylindrical grinding machine series, United Grinding Technologies Inc. has increased substantially the ID grinding capabilities of its product line. In regard to internal grinding of chucking components, the Studer CT550 sets new standards. By addressing machine shops’ need for greater precision, better surface quality, and high metal removal rates, UGT claims it has set a new standard with the CT550 CNC internal/universal cylindrical grinder: It works more quickly and precisely, and is applicable in a broader range of operations, with production options that make it cost-effective.

United Grinding Technologies is the North American arm of the Körber-Schleifring Group and supplier of such machine brands as Blohm, EWAG, Jung, Mägerle, Mikrosa, Schaudt, Studer, and Walter, is a well-recognized expert in grinding technology.

“By saving on auxiliary times, the CT550 considerably shortens the cycle times of the grinding process,” stated UGT.

The CT550 is a compact machine for medium-sized workpieces with up to three in-line grinding spindles.  The modular and flexible arrangement of spindles enables optimal dimensioning of the machine, ranging from the manufacture of individual parts as well as large-scale production.  This machine also supports integrated and autonomous loading system

The Granitan S103 machine bed provides a very solid and thermally stable CT550.  This cast material is metallurgically formulated for optimal grinding conditions.  Thus, the machine bed provides an integrated guide system that’s stable enough to absorb the high forces that occur during grinding. 

Thanks to its thermal behavior, UGT explained, the machine bed of the CT550 largely equalizes brief variations in temperature – so that the machine operates with consistently high precision even with changing ambient temperatures.  Its high rigidity and superior damping provide the basic conditions for good surface quality on ground parts and long service life for grinding wheels.

Studer’s CT550 is ideal for small- to medium-sized internal cylindrical grinding applications, such as die plates, spring collets, tool holding fixtures, hydraulic components, and thread-ring gauges composed of hard materials like tool steel, carbide, ceramics and glass.

Three in-line modular spindles provide flexibility and optimal dimensioning.  The diameter of the high-frequency (HF) spindle ranges form 80 to 120 mm.  The belt-driven spindle diameter is 80 mm. The external grinding wheel has a diameter of 305 mm. Axes travels are 520 mm (X) and 250 mm (Z). The manual B-axis setting angle is +1˚/-1˚. 

The workhead speed is 1,200 rpm, maximum. Load on the spindle nose, 100 kg. Center height above the table is 1,500 mm.

The maximum part length is 650 mm, while the grinding length is 150 mm.

The machine uses the Fanuc 31i-A control platform, which is intuitive and user friendly.

United Grinding universal, external and internal grinders are supported by s team of grinding specialists and technicians who have practical experience with more than 10,000 machine installations, and access to a worldwide support and service network.

About the Author

Robert Brooks | Content Director

Robert Brooks has been a business-to-business reporter, writer, editor, and columnist for more than 20 years, specializing in the primary metal and basic manufacturing industries. His work has covered a wide range of topics, including process technology, resource development, material selection, product design, workforce development, and industrial market strategies, among others. Currently, he specializes in subjects related to metal component and product design, development, and manufacturing — including castings, forgings, machined parts, and fabrications.

Brooks is a graduate of Kenyon College (B.A. English, Political Science) and Emory University (M.A. English.)