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WMW Niles DH 250

Relieve Turning Lathe NILES DH 250/4
(Specialized relieving and profiling lathe)

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The NILES DH 250/4 is a precision relieve turning lathe designed for the efficient execution of profile turning, relieving, and finishing operations on cylindrical parts up to 250 mm diameter. Manufactured by NILES, a reputable German machine tool builder, this machine combines rigid mechanical construction with smooth motion control to deliver consistent results in demanding workshop environments.

This machine is ideally suited for toolrooms, repair shops, and manufacturing facilities where relief turning of tools and components is required. Its sturdy built-in relieving device ensures high accuracy and repeatability for profiling tasks, including operations that cannot be performed easily on standard lathes.

The faceplate diameter of 250 mm accommodates a wide range of workpieces up to 250 mm in turning diameter, with a turning length of 630 mm. Workpieces are securely positioned on the well-designed center system, featuring a center height of 270 mm over bed parallels and a center width of 900 mm. The machine’s removable chuck plate and Morse taper No. 5 mount provide flexibility for different holding and tooling options.

The lathe’s spindle offers an infinitely variable speed range from 28 to 450 rpm, driven by a robust 4 kW spindle motor, allowing precise speed selection for both rough and finish relieving cuts. The built-in quill is 80 mm in diameter with a maximum stroke of 16 mm, enabling controlled profiling movements.

The NILES DH 250/4 is supported by its factory documentation, making it straightforward to integrate into industrial workflows and maintenance routines. The overall construction — approximately 2750 mm in length, 2975 mm in width, and 1100 mm in height — reflects its stable and durable design.

Key Features:
*Relief turning lathe for specialized profiling operations
*Maximum turning diameter: 250 mm
*Turning length up to 630 mm
*Faceplate diameter: 250 mm
*Center height: 270 mm
*Infinitely variable spindle speed: 28 – 450 rpm
*Spindle drive power: 4 kW
*Quill diameter: 80 mm, stroke 16 mm
*Morse taper No. 5 spindle mount
*Heavy industrial construction with factory documentation

Typical Applications:
*Relieving and profiling cylindrical components
*Tool relief turning and finish profiling
*Small series specialized machining
*Maintenance and toolroom work