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Views: 0 Author: Site Editor Publish Time: 2026-04-03 Origin: Site
9000 W CNC Spindle Motor
9.0KW Air Cooled Spindle Motor
Model：SPF-9.0
Price: Check price on Holry Spindle Contact
Cooling: Air
Collet: ER32
Voltage: 220V , 380V
Speed: up to 18000 RPM
9000 W CNC Spindle Motor
13.5KW Air Cooled Spindle Motor
Model：SPF-13.5
Price: Check price on Holry Spindle Contact
Cooling: Air
Collet: ER40
Voltage: 220V , 380V
Speed: up to 18000 RPM
9000 W CNC Spindle Motor
7.5KW Air Cooled Spindle Motor
Model：SPF-7.5/SPFB-7.5
Price: Check price on Holry Spindle Contact
Cooling: Air
Collet: ER32
Voltage: 220V , 380V
Speed: up to 24000/18000 RPM
9000 W CNC Spindle Motor
6.0KW Air Cooled Spindle Motor
Model：SPF-6.0/SPFB-6.0
Price: Check price on Holry Spindle Contact
Cooling: Air
Collet: ER32
Voltage: 220V , 380V
Speed: up to 24000/18000 RPM
9000 W CNC Spindle Motor
4.5KW Air Cooled Spindle Motor
Model：SPF-4.5/SPFB-4.5
Price: Check price on Holry Spindle Contact
Cooling: Air
Collet: ER32
Voltage: 220V , 380V
Speed: up to 24000/18000 RPM
9000 W CNC Spindle Motor
0.8KW Air Cooled Spindle Motor
Model：SPF-0.8-65
Price: Check price on Holry Spindle Contact
Cooling: Air
Collet: ER11
Voltage: 110V , 220V
Speed: up to 24000 RPM
9000 W CNC Spindle Motor
2.2KW Air Cooled Spindle Motor
Model：SPF-2.2/SPFB-2.2
Price: Check price on Holry Spindle Contact
Cooling: Air
Collet: ER20
Voltage: 220V , 380V
Speed: up to 24000/18000 RPM
Holry spindle is a high-quality 2200KW CNC spindle well suited for more advanced CNC work. The increased power of this spindle means you can use it to engrave a wide variety of different materials, including wood, plastic, PVC, copper, brass, and aluminum.
In this CNC router spindle motor kit, you get the 2.2KW water-cooled spindle itself, a 2.2KW VFD inverter, an 80mm clamp mount, thirteen ER20 collets ranging from 1mm to 13mm, a water pump, a 10m hose and 10 bits ranging from 0.8-3mm.
This is a very powerful yet efficient spindle that remains quiet while in operation. It uses advanced dynamic balance technology to reduce noise and improve stability, and it’s also very durable, with upgraded steel bearings that extend the working life, with the manufacturer claiming this spindle can operate for 8 hours a day for two years before needing to be replaced.
The CNC spindle is the core rotating component of a CNC machine tool, precisely controlled by the CNC system to drive the tool or workpiece to rotate at high speed, enabling machining operations such as cutting, milling, drilling, and grinding. It is often referred to as the "heart" of the machine tool.
Providing power: The rotational speed and torque required for cutting output directly determine the machining efficiency.
Guaranteed accuracy: Its rotational accuracy, rigidity, and stability directly determine the dimensional accuracy and surface finish of the workpiece.
Execution actions: Under the command of the numerical control system, it can achieve stepless speed change, directional precise stopping, automatic tool change, and realize complex machining processes.
Main spindle body: A hollow shaft made of high-strength alloy steel, with a tool/workpiece clamped at the front end.
Bearing system: Supports the spindle and determines its speed, accuracy, and lifespan (commonly used are angular contact bearings and ceramic bearings).
Drive system: Provides rotational power (motor + transmission mechanism).
Lubrication and cooling system: It dissipates heat and reduces wear during high-speed operation, ensuring thermal stability.
Clamping device: such as BT/SK/CAT tool shank interfaces, used for clamping tools.
Sensing and Control: Integrated encoder for feedback of speed and position, enabling closed-loop control.
1.Belt driven spindle：The motor is located externally and drives the spindle to rotate through a belt. The advantages are cheap, simple structure, and easy maintenance. The disadvantages are poor high-speed performance, high noise, and average accuracy. Suitable for economical CNC lathes, ordinary milling machines, and medium low speed machining.
2.Gear spindle (gear transmission spindle)：Variable speed by motor and gearbox, with high torque. The advantage is low-speed high torque, suitable for heavy cutting. The disadvantages are poor high-speed performance, high vibration, and noise. Suitable for CNC lathes, heavy-duty cutting, and rough machining.
3.Electric spindle (direct drive spindle)：The motor rotor is directly mounted on the main shaft, without belts or gears. The advantages are extremely high speed, high precision, low vibration, and fast response. The disadvantages are high cost and complex maintenance. Suitable for machining centers, engraving and milling machines, high-speed precision carving, mold processing, and the 3C industry.
4.Direct spindle (coupling direct connection)：The motor is directly connected to the main shaft through a coupling, between the belt main shaft and the electric main shaft. The advantages are simple structure, higher rotational speed than belts, and better accuracy. Suitable for mid-range machining centers and general CNC milling machines.
1.Low speed high torque spindle：Low speed and high torque. Used for heavy cutting, rough machining of cast iron and steel parts, and CNC lathe spindles.
2.High speed precision spindle：Rotational speed 6000-15000 rpm. Used for general machining centers and mold roughing and semi precision.
3.High speed electric spindle：The rotational speed is 18000-60000 rpm or even higher. Used for precision carving, high gloss processing, aluminum alloy processing, and PCB drilling.
4.Ultra precision spindle (air/liquid floating)：Air floating spindle, static pressure bearing spindle. The advantages are almost no wear and extremely high rotational accuracy. Suitable for optical processing, ultra precision grinding machines, and semiconductor equipment.
1. Rolling bearing spindle: angular contact ball bearing, cylindrical roller bearing. The most common, with good rigidity and moderate cost.
2. Hydrostatic Spindle: Supported by an oil film, it has high precision and long service life. Mostly used for grinding machines and precision lathes.
3. Gas static pressure spindle (air floating spindle): supported by gas film, ultra high speed, ultra precision. Mostly used for carving and milling, high gloss, and micro hole processing.
1.CNC lathe spindle: mostly gear/belt/direct connection, emphasizing torque
2.Machining center spindle: electric spindle or direct spindle
3.Carving and milling machine/precision carving machine: high-speed electric spindle
4.Grinding machine spindle: precision bearing spindle or dynamic static pressure spindle
When selecting a spindle for CNC equipment, the first step is to consider the actual processing materials and process requirements. When processing hard materials such as steel and cast iron, more emphasis is placed on the torque and rigidity of the spindle to ensure heavy cutting ability.
The rotational accuracy of the spindle directly affects the dimensional accuracy and surface quality of the workpiece. In precision machining scenarios, the requirements for radial runout and axial displacement are more stringent, and a comprehensive judgment based on bearing type and structural rigidity is needed.
Cooling and lubrication methods are also crucial. High speed running spindles usually require reliable water cooling or oil air lubrication to control temperature rise, reduce thermal deformation, and ensure stability during long-term processing.
In addition, it is necessary to consider the durability, maintenance cost, and service life of the spindle. When the working environment is harsh and there is a lot of dust, a structure with stronger sealing and anti-interference properties should be selected.
When choosing the cooling method for CNC spindles, the main factors to consider are the processing time, speed, heat generation, and environmental requirements.
The air-cooled spindle relies on the active heat dissipation of the fan, which has a simple structure, lower cost, and is more convenient to install and maintain. It is less prone to water leakage and condensation problems, making it suitable for short-term processing, low-speed low-power scenarios, such as small precision carving, intermittent processing, or situations where the environment is relatively humid and there is concern about water circuit failures. However, during high-speed continuous processing for a long time, the heat dissipation capacity is limited, which can easily lead to excessive spindle temperature rise, affecting accuracy and lifespan.
The water-cooled spindle takes away heat through circulating water flow, with a much higher heat dissipation efficiency than air cooling. It can effectively control the spindle temperature, reduce thermal deformation, and operate more stably. It is particularly suitable for high-speed, high-power, and long-term continuous cutting conditions, such as mold processing, aluminum mass production, etc. However, it requires a matching water-cooled machine or water tank, more complex pipeline layout, higher cost, and also needs to pay attention to anti freezing, anti scaling, and waterproof leakage, with higher requirements for use and maintenance. Generally speaking, air cooling is more economical and practical for low-speed light load and intermittent processing, while water cooling is necessary for high-speed heavy load and long-term continuous processing to ensure accuracy and spindle durability.
1.ER elastic chuck
model | Clamping range (mm) | typical use |
| ER8 | 0.5–5 | Micro carving, small hole drilling |
| ER11 | 1–7 | 800W-1.5kW spindle, small tool |
| ER16 | 1–10 | 1.5kW -2.2kW spindle, conventional milling and drilling |
| ER20 | 1–13 | 2.2kW -3.7kW spindle, small and medium-sized cutting tools |
| ER25 | 1–16 | 3.7kW -5.5kW spindle, universal machining |
| ER32 | 1–20 | 5.5kW -7.5kW spindle, multi-purpose |
| ER40 | 2–26 | Heavy duty milling, large-diameter cutting tools |
| ER50 | 12–34 | Heavy cutting, large aperture machining |
2.BT/HSK knife handle system
BT tool holder: Common models BT30 (mini machine), BT40 (universal vertical lathe), BT50 (heavy cutting), compatible with ER11-ER40 chuck, with a maximum speed of about 15000 rpm, suitable for conventional milling and drilling, and batch processing.
HSK tool holder: Common models HSK32E, HSK40E, HSK63A, HSK100A, compatible with ER16-ER40 chuck, with a speed of up to 40000 rpm+, suitable for high-speed precision carving, mold processing, and five axis machine tools.
3.Mohs taper chuck
Used for drilling machines, lathes, or vertical drilling, distinguished by Mohs number , the larger the number, the larger the clamping aperture, suitable for drill bits, reamers, and taper shank tools, with strong rigidity and impact resistance, suitable for heavy drilling and deep hole machining.
CNC spindle manufacturing is based on materials and heat treatment, ensuring dimensional and positional accuracy through precision machining, achieving high-speed stability through dynamic balancing and assembly, and finally forming a complete manufacturing chain from blank to finished product through detection and thermal compensation locking performance.
In the spindle industry, it generally refers to spindle running in, also known as running in, running in, and testing.
Simply put, after the spindle is assembled, it is powered on without load and allowed to continuously rotate from low speed to high speed for a period of time. The internal bearings, seals, lubrication, rotor, and other components are 'run in place' while testing stability.
In CNC spindles, speed and torque are a pair of core performance indicators, which are usually inversely proportional and directly determine what machining the spindle is suitable for.
Rotational speed refers to the number of revolutions per minute of the spindle, measured in r/min. The higher the rotational speed, the more suitable it is for precision machining and high-speed cutting, such as milling aluminum alloys, acrylic, and small tools, which can achieve better surface smoothness and improve feed efficiency. However, excessive rotational speed often leads to a decrease in torque, making it difficult to perform deep cutting.
Torque represents the rotational torque of the spindle, reflecting the strength of the spindle. The greater the torque, the stronger the spindle's ability to resist cutting resistance, making it more suitable for heavy cutting and deep cutting of hard materials such as steel and cast iron. It can ensure stable cutting without stuffiness or cutting, but high torque usually requires lower speeds to achieve.
Size
Installation flange diameter and length: These are the core dimensions connected to the machine head, such as common flange specifications such as 65mm, 80mm, 100mm, 125mm, etc. They must be perfectly matched with the spindle seat hole position of the machine tool, otherwise they cannot be fixed or the concentricity deviation is too large.
Extension length: That is, the distance from the front end of the spindle to the flange, which will affect the Z-axis stroke, machining depth, and whether it will interfere with the workpiece. If it is too long, it will reduce rigidity, and if it is too short, it may cause tool collision or insufficient machining range.
Chuck interface size：For example, ER11, ER16, ER20, ER25, ER32, etc. determine the maximum diameter of the tool that can be clamped and are directly related to the front nut and claw structure.
Conical hole size: Interface sizes such as BT30, BT40, BT50, or HSK63A are critical dimensions that match the tool holder, affecting tool changing, rigidity, and load-bearing capacity.
Getting to know the types of CNC machining tools
Walk into any machine shop and you'll see the same core lineup of cutting tools doing most of the heavy lifting. Each one has its own comfort zone, some rip through aluminum like it's butter, some live for fine finishing passes, and some exist purely to drill holes all day without complaining.
1. Milling tools (for milling machines/machining centers)
2. Drilling tools
3. Thread machining tools
4. Turning tools (for CNC lathes)
1.High Speed Steel HSS:Cheap and resilient, suitable for low-speed and small batch production.
2.Hard alloy (tungsten steel):High hardness, high temperature resistance, CNC mainstream.
3.Coated cutting tools (TiN, TiCN, AlTiN, etc.):Wear resistant, long lifespan, suitable for high-speed machining.
4.Ceramic/CBN/Diamond Cutting Tools:Superhard material, used for high hardness steel, cast iron, and non-ferrous metals.
1.Integral cutting tools: integral hard alloy milling cutters, drill bits.
2.Machine clamped cutting tools: blade interchangeable, low cost, suitable for large quantities.
3.Abandoned blade: commonly used in turning tools and face milling cutters.
