THE ERICKSON BT30HPVTTHT14075M CHUCK END MILL HOLDER FEATURES A CAT30 TAPER. THIS TOOLING COMPONENT HAS AN OVERALL LENGTH (OAL) OF 5.75 INCHES AND A PROJECTION OF 2.88 INCHES. THE BORE OUTSIDE DIAMETER (OD) IS 1.08 INCHES, AND THE BORE INSIDE DIAMETER (ID) IS 0.57 INCHES. THE HOLDER IS RATED FOR A MAXIMUM ROTATION SPEED (MAX RPM) OF 15,000.