NK Engineering Services supplier of PCB Drilling spindles, CNC Spindles, CNC ATC Spindle Motor, Water Cooled Spindle Motor, CNC Router spindle, Milling spindles, Bangle engraving spindles

Model no. PCB-125A

The PCB-125A ATC is a machine spindle with great performance having a maximum speed of 125,000 rpm. This spindle prevails an AC motor and a front thrust system which delivers precision and stability, this makes it a supreme choice for practice in specific CNC machine tools.

The NK Spindles air-bearing offers unmatched accuracy and is engineered to pursue ultra-low error motions, stiffness, and high-speed proficiencies. These spindles are supreme choices for applications viz semiconductor manufacturing, PCB drilling, and glass grinding micro-machining of non-ferrous materials, where efficiency is of utmost need.

The spindle construction possesses ATC mechanism, and the tool collet is 3.175mm/6mm.

Application:

CNC PCB Drilling Machine
CNC Sheet Metal Drilling
CNC Mobile Tempered Glass Engraving
CNC Mobile Body and cover Engraving
CNC Glass Epoxy Engraving
CNC Denture Machine
CNC Glass grinding
Micro-machining of non-ferrous materials

Air bearings (aerostatic bearings) have a gas film (air) and utilize a thin layer of air to distinguish two surfaces in motion, removing the necessity for traditional lubricants and permitting for frictionless movement. This strategy allows the moving parts to function effortlessly and silently, without creating heat or wear, making them appropriate for applications that need precision and steadfastness, such as accurate measurement, as well as semiconductor manufacturing.

The air-bearing spindle's frictionless enables enormously particular motion and compact vibration, which makes this an ideal solution for highly precise applications like medical device assembly, semiconductor manufacturing, and optics.

Other features include high quality, improved reliability, smooth motion, and stability. These spindles are proficient in completing very complex tasks easily.

High Rotational Accuracy – Bearing air films average any surface features to a low level enabling error motions of less than 0.05 um TIR to be achieved.
Low Vibration – All air spindles are balanced to better than 0.001 gm cm.
High Dimensional Stability – Low bearing friction and water cooling enables negligible thermal growth to be achieved.
High Speeds – Again low bearing friction and the use of water cooling allow bearings to operate at extremely high surface speeds.
High Stiffness - The small clearances inherent to air bearings enables them to be designed with high static stiffness. Air bearings also enable large shaft diameters to be used which enhances the stiffness of spindle assemblies.
Increased Bearing Life – The absence of metal-metal contact ensures an unlimited bearing life provided the air supply is maintained clean and free from oil and water.
Improved Surface Finish – Due to the inherently high accuracy of rotation of air bearings and low vibration, air spindles use in machining applications can produce surfaces with mirror finishes.
Cleanliness – Not requiring any liquid lubricants air spindles are suitable for use in clean rooms.
Ease of Maintenance – Air spindles do not require servicing. Air supplies must however be maintained.

Model	PCB-125A	Speed range（ rpm）	20,000-125,000
（ V） Voltage Range	80-200	Frequency Range（ Hz）	334-2,083
Max Currency（ A）	5	Max. Power （ Kw）	1.2
Bearing Type	Air Bearing	（ Kg） Spindle Weight	4.5
No.	Parameter	Value
1	Static Run-out（ µm）	≤2.0
2	Dynamic Run-out（ µm）	≤8.0
3	Vibration（ mm/s)	≤１ .0
4	Spindle inner cone runout （ µm）	≤１ .0
5	Axial load test（ kgf）	≥22
6	Radial load test（ kgf）	10
7	Motor winding insulation grade	≥500MΩ(H Grade ）
8	Motor winding withstand voltage test	1500V/1min Withstand voltage test

9	（ Ω） Power line resistance	2.5±0.2
10	（ KΩ）Temperature sensor resistance	R≤100（ At 25℃ ）
11	（℃） Coolant temperature scope	20±2
12	Coolant pressure (MPa)	0.3≤P≤0.5
13	（ L/min） Cooling water flow	≥2.8
14	（ L/min）Cooling oil flow	≥3.0
17	(kgf/cm²) Spindle working air pressure	5.6--6.5
18	（ L/min） Air flow for spindle	88-94（ At 0.6 MPa ）

PCB Air-Bearing 125k rpm Spindle

Model no. PCB-125A

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