The G0704/WMD20 style machines have well known problems with their power-trains. Gears stripping, motors burning out, drive boards blowing - all create a very unreliable machine. If you plan on CNCing your machine, or just want to do a lot of work, a replacement motor is a must! Going to a belt drive greatly improves the aesthetics of using the machine, making it much quieter while increasing the RPM.
This belt drive & motor combo are designed to be simple & compact, while retaining the quill drive function. You can also use the existing motor cover. New Quill & Spindle bearings are recommended for lower friction running.
Quill Drive: Replace with Nachi Shielded 6007ZZE & 6209ZZE.
R8/MT3 Spindle: Replace with 7007 & 7005 angular contact bearings (requires bearing spacer)
MT2 Spindle: Replace with 2x 7005 angular contact bearings (requires bearing spacer)
The belt drive should be compatible with the
SPG 2217-lll LV
Busy Bee CX600
May Also fit Optimum BF20, Titan TM25V Style machines - check diagram below.
The Adlee AM370-H is a compact brushless DC motor, ideal for
small milling machines & lathes. In use it has shown to provide very stable
RPM - even under load. The lack of carbon brushes virtually eliminates maintenance.
In practice it has a virtually unlimited duty at 1000 watts
(based on 20c ambient temp).
Motor & Drive Features:
- 370 Watt Rated / 1110 watt max (with 300% Over current).
- 6000rpm Speed, 1.96Nm Torque
- Taps to M6 x 1.00 with no reduction, M8 x 1.25 with 2:1 reduction
- Mach 3 compatible - works with most speed control boards (CNC4PC C6, HommanDesigns Digispeed)
- Fully programmable settings (Accel, Decel, P gain, I gain)
- Monitoring features - commanded RPM, actual RPM, amperage draw.
- Built in protection features - Motor & drive over heat, over voltage, over current, stall (overload).
- 200-240v only (not dual voltage).
Powertronic BLDC motor series
BL2 Driver Manual Download
Max Power / Stall Testing
Shipping is $149NZD to the USA, Canada, UK, Western Europe. $75 to Australia. Please email for quotations to other countries.
The motor is only 370watts! How is that useful!?!?
A: The motor is "rated"
for 370watts 100% duty, in 40c (104F) heat. This is an extreme environment - In practice, the motor & driver
have 300% over-current capability and can easily draw over 1000 watts when called
upon (1110w max), for hours on end! It's thermally protected and will cut-out at 100c.
great pal, but I need some video evidence!
A: Sure! Please see the
How powerful are these motors at low RPM?
A: Please see the Power/Speed
chart in the pictures below. This graph was achieved by manually stalling the
motor at various RPM, then backing off the load. It's not supplied by
the manufacturer! It shows the actual wattage drawn when pushed the
limit. The torque output is very constant - it will produce 1.96nm at 300rpm, up to 6000rpm.
Is the motor suitable for power tapping?
A: Yes! Acceleration
& deceleration are adjustable and make for quick reversing. With no pulley
reduction, the motor can tap to M6, or with a 2:1 reduction it can tap M8 holes (in aluminium).
It could tap larger holes with further reduction to increase torque.
How do I know if the available power will be enough for my tools/machine etc...
A: There's a lot of variables
to that question, but all testing was done using a 12mm Roughing cutter with
full cutting width in 6061 Alu and a 2:1 Reduction ratio.
Generally the motor would be close to its limits at about a 12-12.5mm depth
of cut, and feedrate of 330mm/min, removing 49 cubic/cm a min. With standard
4 flute endmills (HSS or Carbide), it could achieve approx 33 cubic/cm per min.
With a 1:1 ratio, the cutting depth would need to be halved,
but the feed rate doubled (cutter dependent). The sharpness of the tool, cutting
rake, flute angles & other factors vary considerably, so its best to experiment
with your tools to establish baseline performance.
Q: Can the motor
& drive be sold separately?
A: No sorry, they're
only available as a matched set.
the driver unit power other Brushless motors?
A: It's very unlikely
- while all brushless motors work on the same principle, other features limit
interoperability such as hall sensor spacing/timing, motor operating voltage,
temperature sensor monitoring (not all brushless motors have built in temp sensors).
This driver is specifically designed for the supplied motor and its inherent
features. It will not function without all signals present.
Installed on a Weiss WMD20LV Mill/Drill