Product Overview
This document provides technical specifications and recommended usage conditions for two types of 3-flute ball end mills: the MSBH345 for hardened steel and the MSB345 for general use. Both products feature a unique 3-flute design and unequal flute spacing to minimize chattering and enhance machining efficiency.

Specifications
The document lists detailed specifications for each product, including ball radius, length of cut, diameter, neck taper angle, shank diameter, overall length, and retail price. The MSBH345 is designed for high hardness materials, while the MSB345 is for general use. The specifications are provided in a tabular format with measurements in millimeters and prices in Japanese Yen.

Recommended Milling Conditions
The document includes recommended milling conditions for various work materials such as carbon steels, alloy steels, and hardened steels. It specifies the depth of cut, feed rate, and spindle speed for different ball radii. The conditions are tailored to the material type and are presented in tables for easy reference.

Usage Notes
Several important notes are provided regarding the use of these tools:

• Depth of cut is divided into axial (ap) and radial (ae) components.
• Oil mist coolant is recommended for optimal performance.
• Spindle speed and feed rate should be adjusted proportionally.
• Adjustments may be necessary based on the machine's rigidity and the depth of cut.
• The standard overhang length is 4 to 5 times the diameter; adjustments are needed if exceeded.

Contact Information
The document provides contact details for the company's main office in Tokyo and several regional offices across Japan, including Osaka, Nagoya, Nagano, Sendai, and Fukuoka.