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Question #: 14563

Question: What is the minimum RPM for the 2.2kW spindle?

Current Solution

Spindles with 2 poles, which is typically for these types of spindles will have a minimum RPM of 6000 RPM or 100Hz; however, I would not run the spindle below 15000 RPM or 250Hz to give a safety factor and no damage will occur.

If you have a 4 pole spindle, then much lower RPMs can be achieved, and with higher torque than a 2 pole spindle. The 4 pole spindle will require more power than 2 pole spindles and will not be able to achieve as high maximum RPMs.

Respond:

Other Possible Solutions to this Question

  • What is the rpm range of the 2.2kw spindle and inverter?

    The VFD is capable of a maximum of 400 Hz frequency. That converts to 24,000 RPM for the spindle. The minimum frequency is 100 Hz which is 6000 RPM.

    Click the link to respond:
    What is the rpm range of the 2.2kw spindle and inverter?

  • What is the warranty on your 2.2KW spindle

    We honor a one year warranty on most parts like main machine components, structural parts, mechanical parts and some electronic parts including spindles.

    Click the link to respond:
    What is the warranty on your 2.2KW spindle

  • What is the HP of the 2.2KW spindle

    The 2.2kW spindle outputs approximately 3 HP (Horse Power).

    Click the link to respond:
    What is the HP of the 2.2KW spindle

  • What are the noise levels of the 1.5 Kw and 2.2Kw spindles?

    The noise level of the 1.5 kW and the 2.2 kW are very similar. The noise level is considerably quieter than typical routers. I am going to add sound db levels to this FAQ a bit later.

    Additional Information:
    The db (decibels) reading for the spindle is 70 and an 890 Porter Cable router (a lower powered tool than the spindle) measured 90 db. Both measurements were taken in the same environment and measured at the same distance from the tool.

    Additional Information:
    Practically silent. The inverter makes more noise!

    Additional Information:
    Practically silent. The inverter makes more noise!

    Click the link to respond:
    What are the noise levels of the 1.5 Kw and 2.2Kw spindles?

  • what is the packing list for the laser/spindle combo head

    The laser/spindle combo head includes the following major items:

    Spindle components:
    - The Spindle and VFD (Variable Frequency Drive) also called an inverter.

    Laser components:
    - 40 watt laser tube.
    - Laser nozzle with laser focus lens (20 mm).
    - nozzle tube fitting with 36 inches of silicone tubing.
    - 40 watt laser power supply.
    - Potentiometer (panel mount) to adjust laser intensity.
    - Toggle switch (on/off SPST - Single Pole Single Throw).
    - Air pump to provide air assist to keep debris out of the nozzle.

    Structure and hardware:
    - All structural parts to form the z-axis rail support and mounts for the spindle and laser tube/nozzle, vacuum hose and dust shoe
    - 1/2" - 10 TPI 5 starts lead screw (2 turns per inch).
    - Many screws/nuts/cross dowels.
    - Dust shoe with installed strip brush.
    - Aluminum angle to serve as rail.

    Click the link to respond:
    what is the packing list for the laser/spindle combo head

  • What is a normal max operating temperature for a 2.2kw water cooled spindle?

    I don't know the exact temperature, but the spindle actually needs to get to a relatively high temperature for normal operation and to protect the bearings. IF I find better information from our supplier, I will add this information to this answer.

    Click the link to respond:
    What is a normal max operating temperature for a 2.2kw water cooled spindle?

  • What size collet can the 2.2kW spindle use?

    All of our spindles come standard with a 1/4" collet. The 2.2kw, and 4.0kw, can be upgraded to a 1/2" collet with a separate purchase.

    Click the link to respond:
    What size collet can the 2.2kW spindle use?

  • What collet size comes with the 2.2kw spindle?

    All of our spindles come standard with a 1/4" collet. The 2.2kw, and 4.0kw, can be upgraded to a 1/2" collet with a separate purchase.

    Click the link to respond:
    What collet size comes with the 2.2kw spindle?

  • on the 2.2Kw water cooled spindle, what is the cooling port thread type and size?

    It is an M8 metric size on the port going into the spindle, and a 1/4" compression on the other side.

    Is the M8 port a M8x1.25 or M8x1?

    If you are referring to the book build, use a chamfer bit that is large enough to create a chamfer for most of the edge of the 3/4" thickness of the board, but still has a sliver of space for the bearing on which to ride.

    Additional Information:
    Mine is M8x1mm. I replaced the stock fitting with a brass hose barb and used "steel wire reinforced vacuum hose" with a 1/4" ID because it resists kinking and collapsing.

    Click the link to respond:
    on the 2.2Kw water cooled spindle, what is the cooling port thread type and size?

  • What is the liquid input and output barb size on your 2.2kw water cooled spindle?

    The spindle water inlet and outlet fittings are 1/4 Inside Diameter and 3/8 Outside Diameter.

    You can find the silicone tubes here:
    https://buildyourcnc.com/item/pneumatic-hydraulic-silicone-tubing

    This fitting will connect to the pump (1/2" male to 1/4" female):
    https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Female-to-Male

    And this fitting will provide a reduced barbed size (1/4") for the tube:
    https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Barbed-to-Male

    Click the link to respond:
    What is the liquid input and output barb size on your 2.2kw water cooled spindle?

  • What is the Greenbull average power consumption in conjunction with 2.2KW spindle?

    You can determine you overall CNC machine current consumption be adding your spindle power plus your CNC motion power and the power that your computer requires.

    the formula to understand the current of each component is watts = volts x current, or W = V * I, or with some algebra, Current (I) = Watts (W) / Volts (V)

    For example:

    Spindle:
    The 2.2 kW = 2200 watts and you can find the current by taking the input voltage of 220 volt and get the current using the above formula: 2200 W / 220 V = 10 A (Amps)

    CNC motion electronics:
    The power supply that comes with our machines is generally 8.8 A

    Computer:
    The computer that you use to control the CNC machine will have a specific wattage. Let's say the watts is 500: 500 W / 110 V = 4.5 A

    Add them up: 10 A + 8.8 A + 4.5 A = 23.3 Amps

    Click the link to respond:
    What is the Greenbull average power consumption in conjunction with 2.2KW spindle?

  • Is there a recommended break in process for a 2.2kw water cooled spindle?

    A break in process, I'm guessing means if the spindle needs to be turned off for some reason? If so, then no. The water cooled spindle can be run constantly. We run our spindle for very long periods of time.

    Click the link to respond:
    Is there a recommended break in process for a 2.2kw water cooled spindle?

  • LENGTH OF THE BRUSH STRIP FOR SPINDLE 2.2KW

    The total length of the brush strip for a 2.2kW spindle would be 17 1/4" inches.

    Additional Information:
    20

    Click the link to respond:
    LENGTH OF THE BRUSH STRIP FOR SPINDLE 2.2KW

  • Can you tell me what gauge wire is needed for limits switches and the spindle?

    The hookup wires you will need is 22 to 24 AWG stranded and shielded for the wiring of the limit switches and E_Stop. Our kit customers select various places for these switches, so we don't supply the wiring. If you don't use shielded cable, you will need to change the debounce setting in Mach3 (if that is the control program you are using).

    We typically use 14 AWG stranded wire for the VFD to Spindle (U, V, W) connections.

    Click the link to respond:
    Can you tell me what gauge wire is needed for limits switches and the spindle?

  • how do you wire the 2.2kw spindle and vfd for 110 single phase

    You can find the wiring diagram for the 2.2kW spindle and, follow through instructions here.
    https://www.buildyourcnc.com/item/spindle-inverter-2!2kw-spindle-novfd#prettyPhoto/8/

    Additional Information:


    Additional Information:
    wiring diagram at spindle top


    Additional Information:

    Click the link to respond:
    how do you wire the 2.2kw spindle and vfd for 110 single phase

  • Your 2.2kw spindle w/inverter is out of stock for 110v, do you anticipate on offering these soon?

    We may deprecate these units as we had too many issues with them.

    Click the link to respond:
    Your 2.2kw spindle w/inverter is out of stock for 110v, do you anticipate on offering these soon?

  • Do you sell the cooling solution for the liquid cooled spindle 2.2kw.

    We are going to add a cooling solution very soon to the website. I am awaiting inventory of Fan and Radiators.

    The cooling units that we will be offering are the ones shown in the two pictures here:
    https://www.buildyourcnc.com/images/greenbullv2-2-800.JPG
    https://www.buildyourcnc.com/images/greenbullv2-4-800.JPG

    The fan/radiator is covered up a little bit in the first picture by the vacuum hose.

    Click the link to respond:
    Do you sell the cooling solution for the liquid cooled spindle 2.2kw.

  • I would like to know what the lowest rpm that can be acheived with the 2.2kw spindle and inverter and still have enough torque to drill

    According to the supplier of the 2.2 kW spindle, the safest operating speed for the spindle is 6000 RPM. The supplier also stated that theoretically, the spindle can operate from 0 to 24,000 RPM. I am continuing a dialog with the supplier to delve deeper into understanding the configurations and ramifications of such configurations for operations outside of the safe boundaries into the "theoretical" ranges.

    Additional Information:
    20

    Click the link to respond:
    I would like to know what the lowest rpm that can be acheived with the 2.2kw spindle and inverter and still have enough torque to drill

  • Is the 2.2kW spindle available in an ER20 collet option?

    the 2.2kW spindle uses the ER20 collet by default. The ER20 collets can accept shanks as small as about 1mm all the way up to 9/16 inches or 13mm.

    Click the link to respond:
    Is the 2.2kW spindle available in an ER20 collet option?