625 CNC Spindle Series

The versatile and reliable 625DIN40 delivers governed constant high speeds under load – 30,000 to 65,000 RPM, < 0.55 HP (0.41 kW). Speed up your cycle times and reduce tool breakage with the compact 625 Series. Ideal for mold making, milling, and finishing with small tools up to 1/4” / 6 mm capacity. Only 2 moving parts and air circulation over the bearings, resulting in no heat. Get the reliability of direct-drive milling with no duty cycle and no thermal expansion. Selectable rear or side air feed.

625DIN40 Specifications
Speed30,000 RPM40,000 RPM50,000 RPM65,000 RPM
Power Rating0.4 HP (0.3 kW)0.45 HP (0.34 kW)0.5 HP (0.37 kW)0.55 HP (0.41 kW)
Inlet Air Pressure90 psi (6.2 bar)
Air Consumption Idle12 CFM (5.66 L/s)14 CFM (6.61 L/s)16 CFM (7.55 L/s)
Air Consumption Working Flow11 CFM (5.19 L/s) - 20 CFM (9.44 L/s)
Air Hoses and Fittings Minimum Size6 mm internal diameter
Sound LevelLess Than 78 dBA
Max Shank CapacityER11 UP - 1/4” (6 mm)
Spindle Weight81.6 oz (2.31 kg)

Add These High Speed Spindles to Your CNC for 5 X Faster Production

Retrofit Any CNC with High Speed

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.

625DIN40 Dimensions

625DIN40 Dimensional Drawing
All fittings, couplings, and hoses must have a minimum of 6 mm internal diameter.
625DIN40 Dimensions
A0.87” (22 mm) C6.42” (163 mm)
BØ 2.24” (57 mm)D9.09” (231 mm)
625DIN40 Dimensions
A0.87” (22 mm)
BØ 2.24” (57 mm)
C6.42” (163 mm)
D9.09” (231 mm)


Included Equipment

625DIN40 Spindle
Combo Filter Extractor
ER11 UP Collet System (1/4” or 6 mm)
Collet Wrenches
Air Hose
Plug (For alternate air inlet not in use.)
Coolant Guard
Carrying case

Standard Equipment

ER11 UP collet system (1/4” or 6 mm collet). 3/4” or 20 mm 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 10 mm O.D. - 6.5 mm I.D. (order by foot)16508
Hose & Fitting - 10 mm O.D. - 6.5 mm I.D. - 12’30043

Automatically Tool Change on your CNC

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.

Toolchanger Mounting Assembly Collar and Block

Screw In Mounting Block

Toolchanger Mounting Assembly Two Piece Ring and Block

Two Piece Ring and Block

Toolchanger Mounting Assembly Drill Tap

Drill Tap

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.

TMA Assembly Includes

  1.  Mounting block or ring assembly
  2. Spindle manifold collar with adjustable height connector to block

Auto Tool Change your Air Turbine Spindle® with the Tool Changer Mounting Assembly

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


M4S Micro Demo - 40,000 RPM, 20 IPM in 45HRc on HAAS

Haas CNC Main Spindle v. The Air Turbine CNC Spindle

CNC Spindle Milling Steel at 5000 mm/min on DMG Mori at 50,000 rpm and 0.76 hp

50,000 RPM CNC Spindle on Hermle Engraves Aluminum Elephant

C/T Reduced by 25 Minutes with 50,000 rpm! Pocketing Brass with Air Turbine CNC Milling Spindles!

Steel Milling at 2,600 mm/min - Reduce your Cycle Times with the Air Turbine Pneumatic Spindle

Engraving at 65,000 RPM on Haas VF9 CNC by Air Turbine Spindles®

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].