Product Specifications:
The document outlines detailed specifications for the MRBTNH345 3-Flute Long Taper Neck Ball End Mill models. Each model is identified by a unique code and includes parameters such as radius, neck taper angle, effective length, depth of cut, feed rate, and spindle speed, measured in millimeters. Retail prices are listed in Japanese Yen.

Design Features:
The MRBTNH345 is designed with a strong back taper and unequal flute spaces, enhancing performance on hardened steel. It features the Mugen Coating Premium for improved durability and efficiency.

Performance Comparison:
The document compares the MRBTNH345 with competitor tools, highlighting its superior tool life when used on high-hardness materials.

Recommended Milling Conditions:
A detailed table provides recommended milling conditions for various work materials, particularly hardened steels like SKD61 and SKD11. It specifies parameters such as depth of cut, feed rate, and spindle speed for different radii and taper angles.

Usage Recommendations:
Recommendations for optimal tool usage include using oil mist coolant, adjusting spindle speed and feed rate to prevent chattering, and ensuring proper coolant supply and chip disposal during deep-rib machining.

Contact Information:
Contact details for sales offices in Japan are provided, including phone and fax numbers for offices in Osaka, Nagoya, Nagano, Sendai, and Fukuoka.