Kyocera OTM86121 Indexable Chamfer End Mill 1 in

Product Description

The KYOCERA OTM86121 is an indexable chamfer end mill designed for facing and chamfering operations on milling machines. It accepts XPMT 15T3.. style inserts and holds two inserts simultaneously, secured by screw clamping. The tool features a 1 inch cutting diameter, a 15 degree lead angle, and a 0.564 inch maximum depth of cut. With an overall length of 3.15 inches and a 0.75 inch whistle notch shank, it is built for rigid setup in standard milling chucks and toolholders. This tool is installed and run by machinists and tool-and-die professionals in production and job-shop environments.

This chamfer end mill is suited for right-hand milling applications where chamfering or facing operations are required. The CM series toolholder style makes it compatible with standard CM-style setups. The whistle notch shank provides positive drive and pull-out resistance in typical end mill holders. It is appropriate for use on vertical and horizontal machining centers as well as manual knee mills in both production and maintenance machining contexts.

Key Features

• 1 inch cutting diameter with a 15 degree lead angle for controlled chamfer geometry
• Accepts 2 XPMT 15T3.. series inserts secured by screw clamping
• 0.564 inch maximum depth of cut for substantial chamfer passes
• 0.75 inch whistle notch shank for positive retention in end mill holders
• Right-hand cutting direction compatible with standard spindle rotation
• CM series toolholder style with 3.15 inch overall length
• No coolant-through — designed for external coolant or dry cutting applications

Compatibility

Compatible insert size codes include XPMT 15T304, XPMT 15T308, XPMT 15T316, XPMT 15T324, XPMT 15T331, and XPMT 15T364. Designed for use with CM series toolholders. Fits standard 0.75 inch end mill holders with whistle notch drive.

Installation Notes

This tool is installed by machinists in CNC or manual milling setups. Always power down and lock out the spindle before changing inserts or mounting the tool in the holder. Verify insert seating and screw torque per the insert manufacturer guidelines before engaging a cut. Confirm shank engagement depth in the holder meets minimum requirements to prevent pull-out under cutting loads.