Relief-turning lathe

WMW Niles DH 250

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

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.
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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