HSK40E ATC Spindle Motors
HSK40E ATC spindle options for high-speed precision machining
HSK40E automatic tool change spindle motors for high-speed precision machining, available in 100 mm and 125 mm body sizes across the current Model C range.
Available specifications
Power
3.0 kW, 3.5 kW, 5.5 kW, 7.5 kW
Body
100mm, 125mm
Cooling
Water
Tool holder
HSK40E
Spindle selection
Compare HSK40E ATC Spindle Motors configurations (4)
Review power, body diameter, cooling method, and series differences before requesting a quote.
Configuration summary
Compare by specification
- Model C (4)
- 100mm (2)
- 125mm (2)
- 3.0 kW (1)
- 3.5 kW (1)
- 5.5 kW (1)
- 7.5 kW (1)
Selection guide
How to Choose an HSK40E ATC Spindle Motor
HSK40E interface: built for high-speed precision
HSK40E uses a hollow-shank taper with dual contact (taper + flange face) that maintains rigidity at high RPM where BT30 interfaces can lose contact. The design reduces tool runout and improves surface finish repeatability, making it the preferred choice for precision mould work, fine engraving, and high-speed aluminium finishing.
100 mm body diameter
100 mm body spindles support 3.0 kW to 3.5 kW power ratings. They are lighter and well-suited for Z-axis assemblies with moderate load, higher RPM applications, precision engraving, and fine surface finishing on aluminium and plastics.
125 mm body diameter
125 mm body spindles support 5.5 kW to 7.5 kW. The larger body provides higher rigidity and better heat dissipation for continuous precision cutting, deeper passes, and heavier tool loads in production environments.
Key integration parameters
- HSK40E tool holders: Use only HSK40E-compatible holders with correct hollow-shank geometry. Confirm clamping mechanism and drawbar force specification.
- Pneumatic supply: Clean, dry compressed air for tool release. Confirm pressure, flow rate, and FRL filtration setup.
- Water cooling: All Model C spindles are water-cooled. Size the closed-loop chiller for your duty cycle and ambient temperature range.
- VFD matching: Confirm voltage (220V or 380V), rated current, and maximum frequency. A vector-drive VFD with encoder feedback is recommended for tight speed holding.
- Dynamic balance: Model C spindles are balanced to G1 or better. For sub-micron runout applications, request the balancing certificate.
Information to prepare before requesting a quote
- CNC machine model and Z-axis travel
- Available voltage and frequency
- Target material and typical depth of cut
- Tool holder interface preference and magazine type
- Required runout tolerance and balancing grade
- Destination country for shipping and voltage confirmation
Related technical guides
Plan your spindle integration
Integration FAQ
Frequently Asked Questions
What makes HSK40E different from BT30 for ATC spindles?
HSK40E uses a hollow-shank taper with dual contact (taper + flange) for higher rigidity at speed and better repeatability. It is preferred for high-speed precision machining, fine surface finishes, and applications where tool runout must stay below 3 micron.
Should I choose a 100 mm or 125 mm HSK40E spindle body?
100 mm body suits 3.0-3.5 kW lighter spindle carriers and high-RPM profiling. 125 mm body supports 5.5-7.5 kW with better rigidity for deeper cuts and continuous precision work. Match the body diameter to your Z-axis mounting pattern and target material.
What cooling and air supply does an HSK40E spindle require?
All Model C HSK40E spindles are water-cooled and need a closed-loop chiller sized for your duty cycle. Tool change requires clean, dry compressed air at the specified pressure. Confirm FRL filtration, chiller capacity, and sensor wiring before first run.
Which VFD and voltage do I need for an HSK40E spindle motor?
Model C spindles are available in 220V and 380V configurations. Match the VFD to spindle power (kW), rated current, and maximum frequency (typically 800 Hz or higher). Use a vector-drive VFD with encoder feedback when speed holding tolerance is tight.
Can I use standard BT30 tool holders with an HSK40E spindle?
No. HSK40E requires HSK40E-compatible tool holders with the correct hollow-shank geometry and clamping mechanism. Using BT30 holders in an HSK40E spindle will damage both the holder and the spindle taper.
What dynamic balancing grade should I expect on an HSK40E spindle?
Model C HSK40E spindles are balanced to G1 or better at rated speed. For ultra-precision applications, request the specific balancing report and confirm the runout measurement protocol during quotation.