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Bridge Mills Offer Large Part Machining Capacity

"Johnford DMC LH Series double-column moving table bridge mills join the expansive lineup of Johnford double column and sliding double column machining centers, bringing capacity and affordability to large part machining," said an Absolute Machine Tools spokesperson. The LH series features 110" (2,800 mm) in Y and 122" (3,100 mm) to 244" (6,100 mm) in X in 39.4" (1 m) increments. Standard Z-axis travel is 32" with 42" and 60" optionally available.

Johnford double columns are created from massive Meehanite iron castings. These bridge mills have a long base casting with complete support of the table over the full X-axis travel, allowing large loads to be machined. The Y and Z axes hold fixed loads at all times while the X-axis carries the only dynamic load, allowing for tight machining and tight tolerances during high-speed machining operations. Because there is no table overhang, X-axis pitch and yaw are eliminated. The spindle centerline-to-column distance is minimized, offering further rigidity. The machine's heavily ribbed cast iron construction provides long tool life and part surface finish. The combination of complete surround table guarding with twin screw-type conveyors and a caterpillar conveyor promote complete chip removal with little manual cleaning. Additionally, Finite Element Analysis (FEA) is used to design each bridge mill, simulating the effects of real-world conditions, including vibration, heat, fluid flow and other physical impacts.

The DMC-3100LH, 4100LH, 5100LH and 6100LH all feature rigid box ways in Y and Z and Schneeberger roller ways in X for high load carrying capacity. Heavy duty 35 HP (50 HP opt.) 2-speed gearbox driven spindles provide heavy cutting power and torque. The standard 40 tool ATC (60, 80, 120 opt.) provide fast tool changes.

The DMC LH Series is available in numerous customizable configurations, including extended Z-axis travels, fully automatic five face head changing, and full 5-axis. A variety of options are available to tailor the machines to specific applications such as aerospace and mold/die. FANUC, Mitsubishi, Siemens, Heidenhain and Fagor controls are available based on customer preference.

For more information contact:

Courtney Ortner

Absolute Machine Tools, Inc.

7420 Industrial Parkway

Lorain, OH 44053

800-852-7825 / 440-960-6911

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