Order the 2.2kW Water Cooled Spindle and Inverter Combo for more efficient, quieter CNC routing. Ships from USA. Warranty and Support available.
We have tested spindles from many manufacturers and this spindle and VFD (Variable Frequency Drive) is the best one we have found. This spindle has four (4) bearings. Having four bearings in your spindle is very important and will maintain the precision and extend the life of the spindle. If you're planning on purchasing a spindle from eBay, or other source, keep in mind that support will be limited.
We support our spindles! They are shipped from the United States. We can support the spindles with the years of experience we have been dealing with these spindles and we have searched really hard for the right spindle and VFD.
There is a connection to the spindle for power. Three of the four connections are used which connect to the internal coils that make the spindle spin. The fourth connection is not connected (NC).
Spindles need to be cooled and this spindle uses water for this purpose. More importantly, this aspect of water cooling does not allow air movement to cool the spindle (as opposed to routers that move air through the router to cool by convection). Water cools the spindle using conduction (heat transfer through contact). This is important because, as opposed to air movement, water cooling will not blow the dust all over the shop, and the dust and chips left over by the milling and cutting process can be removed with a dust collector or vacuum.
The ports for the water cooling tubes or hose is located at the back of the spindle. The port fitting will accept a tube or hose that has a 1/4" (.25 inch) inside diameter and an outside diameter of 3/8" (.375 inch). Either port can be used for in or out. It's just important that the water flow through the body of the spindle.
The sound level from a spindle is extremely low as compared to routers. In fact, the sound from a spindle is quieter than the actual cutting and milling action from the end mill, and much quieter than a router.
The spindle comes with a 1/4" (.25 inch) collet, which is the measure of the bore (inside diameter) inside which the shank of the end mill is inserted. the collet fits into the shaft where the collet taper matches the shaft taper. When the collet is inserted into this taper and the collet nut is tightened down, the collet squeezes around the shank of the end mill (helped by the way the collet is made with all of the sliced sections surrounding the collet). You will need two wrenches to tighten the collet nut onto the collet. Watch the video on the proper technique of loosening and tightening.
Spindles required the use of a VFD (Variable Frequency Drive) to function. These VFDs are also called spindle inverters. The VFD takes the power from the wall and creates a frequency with voltage and current to spin the spindle. The frequency can be controlled to control the RPM of the spindle.
The VFD has a potentiometer to adjust the speed or RPM, but the RPM of the spindle can also be adjusted automatically from the control software. The VFD has a screen that shows many aspects of the condition or current status of the spindle including RPM or frequency, spindle rotation direction, any faults or errors that may be occuring and much more. Every aspect of the spindle can be controlled by the VFD and the VFD can also be programmed (setting can be configured).
The VFD controls the spindles torque and commanded speed using PID control (Proportional Integral Derivative) that makes sure the spindle has the current and torque it needs to maintain the RPM under various load conditions. Routers are not able to do this and will exhibit a reduction in RPM (getting bogged down) when additional load is put on the router, like trying to cut deep into material.
Controlling the VFD can be done manually, or can be completely controlled using control software like Mach3 and LinuxCNC. The face of the VFD contains buttons for Run, Mode, Reverse/Jog, Stop.Reset, Enter and various arrow buttons to browse and set various functions through the menu.
The VFD contains many terminals connections for wiring the spindle to the VFD, wiring the controller (computer or other contolling device) to the VFD and wiring the VFD to the wall outlet for mains power.
The spindle, by itself, weighs 10.93 lbs.
2.2kW Spindle 110V or 220V
Inverter (VFD) 110V or 220V
Collet: ER20 1/4"
Collet Size for 2.2kW Spindle: ER20
Spindle Diameter: 80mm