660 CNC Spindle Series

The 660JS (3/4” / 20mm Straight Shank) is ideal for heavier duty applications and milling hard materials in corners. The 660 features a higher governed constant speed at 50,000 rpm and even higher power at 0.94 hp (0.70 kW). Our proprietary governor-controlled turbine maintains rated high speed optimizing tool performance and life. Air Turbine Spindles® direct-drive turbine operates with very low vibration and no heat in 24/7 operation. As a result the 660 mills faster in all materials, including tool steel, titanium and ceramics reducing cycle times dramatically. For long life milling in hard materials this robust 660 Series is equipped with quadruple air-cooled angular contact bearings.

Economical consumption of air results from our governor adjusting cfm airflow to the minimum required to maintain high speed. With 2µ precision in its Ultra-Precision Collet ER 11 the 660 is also very precise. Selectable rear or side air feed on each spindle. Automatic Loading from the magazine on all machines.

660JS Specifications
Speed RPM50,000
Power Rating hp (Kw)0.94 (0.70)
Inlet Air Pressure90 PSI (6.2 Bar)
Air Consumption Idle cfm (l/s)14 (6.61)
Air Consumption Working Flow (l/s)14 (6.61) - 35 (16.52)
Sound LevelLess Than 78 dBA
Max Shank CapacityER 11 - 1/4” (6mm)
Spindle Weight65.8 oz (1.95 kg)

660JS Dimensions

660JS Dimensional Drawing
660JS Dimensions
A0.87” (22mm)
B3.23” (82mm)
C5.79” (147mm)
D7.76” (197mm)
E1.62" (41mm)


Included Equipment

Combo Filter Extractor (p/n #30008)
Plug (for alternate air inlet not in use)
Carrying Case

Standard Equipment

ER 11 collet system (1/4” or 6mm collet standard – other sizes optional). 3/4” or 20mm shank standard (Metric Shank comes with metric collet, Inch Shank with inch collet). Oil-free 90 psi / 6.2 bar, clean, dry air supply required.

Accessories ModelsPart #
High Flow Filter / Regulator / Extractor30008
Tube 12mm O.D. - 8mm I.D. (order by foot)16509
Hose & Fitting - 12mm O.D. - 8mm I.D. - 12’30045

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.

ER11- 1/4"ER11- 6mm
Speed RPMPart #Speed RPMPart #


High Speed Precision CNC Milling Spindle on your CNC

Service & Support

Support is always available from our technical team in the USA and Germany. Repair Service is available in Florida and Munich. Call our factory technicians at +1-561-994-0500 or email us at [email protected].