625LHSK-A63 50mm

Extended Barrel Series

Integration of the popular HSK-A63 tool holder into the 625S spindle housing delivers constant high speed with ultra-low vibration and improves accuracy and rigidity. The powerful 625LHSK-A63 (50mm) is designed for close workpiece operations and machines with very short z-axis travel. The 625LHSK-A63 (50mm) delivers patented constant governed high speed operation under load up to 0.50 hp / 0.37 kW at 30,000, 40,000 or 50,000 rpm. At these high speeds, tool coatings achieve the required temperatures to extend endmill life saving money as well as accelerating production. Air Turbine Spindles® patented constant governed high-speed operation under load cuts faster and cleaner – speeding up cycle times and achieving major savings. Faster cutting with small end mills and drills, finishing or polishing with super accuracy. High-speed cutting improves finish quality and accuracy with a fast light pass of your tool. No Duty Cycle.

625LHSK-A63 50mm Specifications
Speed RPM30,00040,00050,000
Power Rating hp (Kw)0.40 (0.30)0.45 (0.34)0.50 (0.37)
Inlet Air Pressure90 PSI (6.2 Bar)
Air Consumption Idle cfm (l/s)10.5 (4.9)11 (5.2)11 (5.2)
Air Consumption Working Flow (l/s)11 (5.2) - 20 (9.4)
Sound LevelLess Than 78 dBA
Max Shank CapacityER 11 - 1/4” (6mm)
Spindle Weight84 oz (2.38 kg)

A 1.00” (25mm)
B 1.00” (25mm)
C 2.25” (57mm)
D 2.16” (55mm)
E 6.97” (177mm)
F 8.03” (204mm)
Accessories Models Part #
High Flow Filter / Regulator / Extractor 30008
Tube 10mm O.D. – 6.5mm I.D. (order by foot) 16508
Hose & Fitting – 10mm O.D. – 6.5mm I.D. – 12’ 30043

Spindle, combo filter extractor (p/n #30008), collet, wrenches, hose and fittings, plug (for alternate air inlet not in use), and carrying case. ER 11 collet system (1/4” or 6mm collet standard – other sizes optional). Oil-free 90 psi / 6.2 bar, clean, dry air supply required.

Accessories Models Part #
High Flow Filter / Regulator / Extractor 30008
Tube 10mm O.D. – 6.5mm I.D. (order by foot) 16508
Hose & Fitting – 10mm O.D. – 6.5mm I.D. – 12’ 30043

We retrofit any CNC machine to mill at a constant high speed 24/7 – so any CNC can be a high-speed machine. This includes, but isn’t limited to DMG MORI, Haas, Fanuc Robodrill, Doosan, Hermle, Hurco, GROB, Brother Okuma, Makino and Mazak. Easy installation using selectable air feed inlets – choose side inlet NPT / Stop Block or center through shank/tool holder air feed. HSK, CAT, BT, and DIN Toolholder options are available. Learn more about Air Turbine Spindles on your CNC Machine by visiting their page at the links below.

Block and Collar on the Automatic Tool Changer Assembly

Automatically load Air Turbine Spindles® in CNC machines with our patented wrap-around Toolchanger Mounting Assembly (TMA). This option allows CNC tool-changers to automatically load/unload our family of high-speed precision spindles using a proprietary collar system and mounting block or ring around the CNC spindle integrated to the right side of the CNC spindle in minutes.

Mounting blocks or rings compatible with Haas, Hurco, Doosan, Robodrill, Hardinge, DMG, Brother, Okuma, and all other CNC’s are available. We are accustomed to developing custom solutions for any CNC. A Universal Block can be provided for drilling your CNC screw positions. Installation Kits are available. The TMA block remains on the CNC spindle for normal tool changes, even if not using the Air Turbine Spindles™ as it will not interfere when using the main spindle.

ER11- 1/4″ ER11- 6mm
Speed RPM Part # Speed RPM Part #
30,000 65060 30,000 65061
40,000 65062 40,000 65063
50,000 65064 50,000 65065


Aluminum Milling at 2000 mm/min on DMG DMU 80 T by Air Turbine Spindles® 50,000 rpm, 0.37 kW 625LHSK 50mm

Brass Milling on Hermle C42U by Air Turbine Spindles® 50,000 rpm, 0.45 hp 625LHSK-A63

Aluminum Milling on Hurco VCX600i 625L 50mm

HRC 45 Steel Milling on Hermle C32 by Air Turbine Spindles® 50,000 rpm, 0.45 hp 625L 50mm

Service & Support

Support is always available from our technical team in the USA, Germany and Mexico. Repair Service is available in Florida and Munich.

Call our factory technicians at +1-561-994-0500 or email us at [email protected].