Overview: The Neptune backspotfacer is a tool designed for creating spotfaces up to twice the diameter of a hole. It is powered by coolant through the spindle and operates using a piston mechanism. The tool is versatile, allowing for part cleaning and insert holder changes for different dimensions.

Specifications: The Neptune tool can be manufactured for a wide range of applications. It includes an emergency function where the shank separates from the holder if the insert holder fails to retract properly. All friction parts are coated with a low friction coating to ensure smooth operation.

Cutting Data: The document provides specific speed and feed rates for different materials such as steel, cast iron, and cast aluminum. For example, steel with a tensile strength of less than 450 N/mm should be operated at 50-100 m/min with a feed of 0.05-0.15 mm/rev.

Tool Specifications: The document lists various Neptune tool models with their respective part numbers, insert types, and dimensions. For instance, the NE-17,0/33,0 model uses TPMT-10T inserts and has specific dimensions for shank and holder.

Application Example: An example is provided using the NE-17,0/33,0 tool on a workpiece SS 1672 with a thickness of 33 mm and a spotface of 3 mm.

Important Notes: Coolant through the spindle is required for operation, with a minimum pressure of 3 bars and flow of 30 l/min. The insert holder should pivot freely, and lubrication and cleaning are necessary if required.

Spare Parts Kit: The document lists components included in a spare parts kit, such as links, distributor, screws, springs, axles, and nuts.

Caution: The tool should not be operated as a single flute, and feed should be reduced by at least 50% when entering a slope.