Iscar 3101938 Indexable Square-shoulder End Mill

Product Description

The ISCAR 3101938 is an indexable square-shoulder end mill from the Heli2000 series, designed for precision milling operations in demanding shop environments. It features a 1-1/4 inch cutting diameter and a maximum depth of cut of 0.394 inches, with a 90-degree lead angle that produces true square shoulders in a single pass. The tool body is solid carbide construction with four flute positions, each secured by a screw-clamping insert holding method. The Weldon flat shank measures 3/4 inch in diameter and 2.3 inches in length, providing positive drive and resistance to pullout under heavy milling loads. Overall length is 3-1/2 inches. Licensed machinists and CNC operators working in aerospace, general metalworking, and precision part production are the primary users of this toolholder.

This end mill is suited for square-shoulder face milling, slotting, and ramping operations on machining centers and CNC mills. The Heli2000 platform accommodates a maximum ramping angle of 3 degrees. It accepts AP..1003.. and HM90 AP..1003.. insert styles, including APCR, APCT, APKR, APKT, APKW, HM90APCT, HM90APKT, and HM90APKW 1003 inserts, giving shops flexibility to run different insert grades and geometries depending on workpiece material and surface finish requirements. The positive rake design reduces cutting forces and supports higher feed rates on ferrous and non-ferrous materials.

Key Features

• 1-1/4 inch cutting diameter with 90-degree lead angle for true square-shoulder profiles
• Maximum depth of cut: 0.394 inches per pass
• 4-insert positions with screw-clamp holding for secure, repeatable indexing
• Weldon flat shank (3/4 inch diameter) resists rotational pullout during heavy cuts
• Positive rake geometry reduces cutting forces and supports aggressive feed rates
• Coolant-through: not available on this body; external coolant application required
• Manufactured to AS 9100, ISO 9001:2008, ISO 14001:2004, ISO 50001, and OHSAS 18001:2007 standards

Compatibility

Compatible insert styles include AP..1003.. and HM90 AP..1003.. series: APCR, APCT, APKR, APKT, APKW, HM90APCT, HM90APKT, and HM90APKW 1003. Toolholder catalog reference: HM90 E90A-D1.25-4-W.75.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Before mounting or indexing inserts, shut down the spindle and confirm the machine is in a locked-out, zero-energy state per OSHA lockout/tagout procedures. Torque insert screws using the correct ISCAR torx key to the manufacturer-specified value listed in the Heli2000 tooling catalog — do not estimate by feel. Verify shank runout and axial seating in the holder before resuming cutting operations.