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HTC with Sub-Spindle

DN Solutions (formerly Doosan Machine Tools) will introduce the PUMA 3100LSY in booth 338900 at IMTS 2022. This new addition to the company's family of horizontal turning centers expands the capabilities of the line by incorporating a sub-spindle into the design.

DN Solutions customers played a significant role in the development of the new model. Their feedback indicated the need for a sizable HTC that is versatile enough to make a complete part (and groups of parts) for defense work, aerospace, oil and gas, compressors and conveyor components.

"In general, the PUMA 3100LSY is ideal for any shop that is doing longer shaft work that requires machining on both ends of the shaft and turning in the middle," said Jim Shiner, Vice President of Sales and Marketing at DN Solutions America.

The PUMA 3100LSY has a 3,000 RPM, 40 HP (30 kW) main spindle and a 30 HP (22 kW) sub-spindle, with the distance between the two being 63.58" (1,615 mm). The sub-spindle enables the complete machining of parts in one set-up. The programmable C-axis on the main and sub-spindle is paired with a BMT-65 live tooling turret that houses 12 tools and runs 5,000 RPM with a 10 HP motor. This design allows milling, drilling and tapping on the back side of parts. Both spindles are temperature controlled for better thermal stability.

The beltless integral sub-spindle delivers speed of 4,000 RPM for smooth vibration-free operation. Maximum spindle torque is 441 ft-lbs. (9,599 Nm). The spindle is supported by angular contact bearings in the front and cylindrical roller bearings in the rear.

The PUMA 3100LSY has a maximum turning diameter of 16.53" (420 mm) and a maximum length of 50.6", with a maximum chuck size of 15" (381 mm) on the main spindle and 12" (305mm) on the sub-spindle. A 12" (305 mm) chuck on the main spindle and 10" (254 mm) chuck on the sub-spindle is standard. The sub-spindle can be synchronized with the main spindle at speeds up to 4,000 RPM for on-the-fly part transfer. Parts can be automatically ejected into the standard parts catcher and onto the parts conveyor.

High-speed turret indexing and ultra-fast rapid traverse rates on the PUMA 3100LSY minimize noncutting time. Mill-drill capability and Y-axis with a full C-axis sub-spindle reduce the need for secondary operations, eliminating additional set-up and handling costs.

The PUMA 3100LSY comes standard with the latest version of the FANUC 0i Plus control, which enhances operating convenience by incorporating common-design buttons and layout. It features improved file management, a new modern look and a user interface that is more readily accepted by the up-and-coming workforce.

For more information contact:

DN Solutions

19A Chapin Road

Pine Brook, NJ 07058


IMTS South Building, Level 3

Booth 338900

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