Haimer A63.140.3/8Z.00 Shrink-fit Holder HSK63A 3/8 Inch

Product Description

The HAIMER A63.140.3/8Z.00 is a shrink-fit tool holder adapter designed for precision CNC machining applications. It features an HSK63A taper shank and accepts a 0.375-inch (3/8 inch) tool bore. The adapter measures 4.3543 inches in overall length with a projection of 3.3465 inches and a nose diameter of 0.9449 inches. Balanced to 25,000 RPM, it is suited for high-speed machining where runout and dynamic balance are critical. Machinists and CNC setup technicians install this adapter in machining centers requiring HSK63A interface tooling. It is a Series Basic design without through-coolant capability.

This adapter is used in vertical and horizontal machining centers equipped with HSK63A spindle interfaces. The 0.375-inch bore accommodates standard 3/8-inch shank cutting tools including end mills, drills, and reamers held by induction shrink-fit methods. With a clamping depth of 1.6535 inches, the adapter provides substantial tool engagement for secure, repeatable clamping. It is appropriate for production shops, tool rooms, and precision manufacturing environments where tight tolerances and high spindle speeds are routine requirements.

Key Features

• HSK63A taper shank for positive, high-speed spindle connection
• 0.375-inch (3/8 inch) bore diameter for standard shank tooling
• Balanced to 25,000 RPM for high-speed machining compatibility
• 3.3465-inch projection and 0.9449-inch nose diameter for clearance in tight workholding setups
• 1.6535-inch clamping depth provides strong tool engagement in shrink-fit bore
• Series Basic designation - no through-coolant port

Compatibility

Designed as an OEM-style shrink-fit tool holder adapter for machining centers equipped with an HSK63A spindle interface accepting 0.375-inch shank cutting tools.

Installation Notes

Installation requires an induction shrink-fit heating unit rated for the holder bore diameter and material; never use an open flame to expand the bore. Power down the machining center and follow the spindle manufacturer lockout procedure before seating or removing the holder. Verify the taper and spindle bore are clean and free of chips before inserting the HSK63A shank. Allow the holder to cool completely and reach ambient temperature before measuring runout or returning the spindle to service.