Horizontal Machining Center features integral drive spindle.

Press Release Summary:

With X, Y, Z axis of 35.4 x 31.5 x 40.1 in., Model a81M is suited for large diameter boring and face milling on stainless steel, titanium, inconel, ductile iron, cast iron, and CGI. It offers tool-to-tool time of 1.7 sec, chip-to-chip time of 4.2 sec, and Accel/Decel ranges from 4.4-3.8 sec at 8,000 rpm. Employing standard CAT 5-taper toolholder, integral drive spindle provides 744 lb-ft peak torque. Pallet measures 25 in. and handles workloads up to 10,800 lb.

Original Press Release:

Makino a81M Provides High Torque and High Thrust

With Fast Integral Drive Spindle

MASON, OH - December, 2005 - Makino's a81M horizontal machining center has been developed for the machining of tough and hard materials. It is ideally suited for large diameter boring and face milling on such challenging materials as stainless steel, titanium, titanium alloys, inconel, ductile iron, cast iron and CGI (compacted graphite iron).

The unique, high-torque and high-thrust spindle on the a81M provides unparalleled productivity and reliability for a machine of this type, which helps customers reduce costs from its manufacturing operations. It has a quick tool-to-tool time of only 1.7 seconds, with a similarly brisk chip-to-chip time of 4.2 seconds.

The a81M has significant application in general machining and production machining. Such specific industries as aerospace, diesel engine, construction equipment, oil field components and pump and compressor manufacturing will all benefit from the a81M.

The a81M is particularly suited for long reach and large diameter boring operations which require a great deal of torque, particularly at low rpm. For applications such as tapping, where a significant amount of spindle stopping, starting and reversal occurs, the Makino high-torque spindle on the a81M is significantly faster and has less idle time.

Integral Drive Spindle
The integral drive spindle of the Makino a81 greatly outperforms all other spindles on the market due to the nature of its efficient design, which provides significantly higher torque at a low rpm. This proprietary design combines the optimum blend of speed and superior rigidity necessary to take aggressive cuts.

Other high torque spindles utilize a geared-type head. Such design intrinsically causes a loss of significant power that further drops spindle efficiency, which can slow down the spindle performance and adversely affect cycle times. The built-in motor method used in the a81M also provides an advantage against vibration as compared with the gear-type.

The Makino high-torque, integral drive spindle employs a standard CAT 50-taper toolholder, with an HSK-A100 option. The spindle on the a81M has an available 744 foot pounds (1,009 Nm) peak torque rating.

The a81M spindle has no corresponding loss of acceleration and deceleration. The quick acc/dec ranges are from 4.4 seconds to 3.8 seconds at 8,000 rpm.

To match that torque, the spindle employs 50 hp from 2,000 to 5,000 rpm. This duty rating and continuous output of the Makino spindle lends itself to difficult cutting .

a81M Features
The Makino a81M has an X-, Y- and Z-axis of 35.4 x 31.5 x 40.1 inches (900 x 800 x 1,020 mm). It has a rapid feed rate and cutting feed rate of 1,420 IPM (36 m/min) in X- and Z-axis and a 1,182 IPM (30 m/min) in Y-axis. It has a 25 inch pallet (630 mm) able to handle workloads of up to 10, 800 pounds (4,900 Kg).

The thrust capacity of the a81M has 25 percent more axes thrust than the previous a81 machine. The center trough hinged conveyor provides for fast and effective chip evacuation, and it has a 40-tool ATC as standard.

No one will do more to lower machining costs than Makino, a global provider of advanced machining technology and application support for the metalcutting and die/mold industries. Makino manufacturing and service centers are located in the United States, Japan, Germany, Singapore, Italy, France, Korea, Taiwan, Turkey, China, Mexico, Brazil, and India, and are supported by a worldwide distributor network. For more information call 1.800.552.3288, or visit Makino on the Web at www.makino.com.

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