Mac Motor Wind
Front 12T, 10T and 8T motors are temporarily unavailable and cannot be ordered. A new version will be ready and is expected to arrive within June until possibly mid-July (comment made 10/06/2016).
The Front Wheel version of the mac motor is quite tight to the fork on the non-disc side of the motor. Please refer to the drawings listed below to confirm the motor outline will match your fork.
The Mac Motor is a High Power, High Torque, Geared Hub Motor intended for Spoked Bicycle wheels from 16” to 700C. Rated Output power is typically between 500 to 1000W depending upon the motor winding selected and the operating voltage. An internal 5:1 planetary gear with clutch is implemented. New stronger Composite Gears are now standard on the 500W motors to ensure a long trouble free life. The gear reduction allows the motor to spin at a higher and more efficient rpm greatly improving the starting torque and hill climbing ability when compared with comparable Direct-Drive motors, whilst also being smaller and lighter than a comparable DD motor. The clutch offers minimal drag when not under power. Unlike the majority of geared motors on the market, the Mac 500W is built for the high power demands of the US market, not the highly restricted EU market. The slower wound versions could still be used and stay within the EU speed limit, for those requiring more hill climbing ability than the typical 250W motors can offer.
The Mac motor uses a 32 magnet, 16 pole motor unlike the vast majority of Geared motors on the Market which use an 8 pole motor. This further improves torque, but does mean that the electrical rpm or commutation frequency is higher than typical geared motors and much higher than Direct-Drive motors, so some care with controller selection is required. The available space for the disk is a little limited at 15mm between the side casing and the inner face of the disk, so some care when selecting a suitable caliper is required or some spacing of the disk away from the side cover and possibly modification of the caliper mounting may be required for some models of disk brake caliper. The Mac 500W rear motor allows both disk brake and 7 speed freewheel to be used on the standard 135mm dropout, which many of the small 250W geared motors cannot achieve. The front 500W Mac motor is now available with disc brake and is compatible with standard 100mm fork dropout.
There is now an upgraded version of the Mac Rear 500/1000W motor (not available for the Front Mac) with double 2mm^2 phase wire and a temperature sensor installed. The temperature sensor produces a DC Voltage referenced to the hall sensor gnd and proportional to the temperature, 0.5V = 50degC, 1V = 100degC. The new version of the upgrade motor also includes an upgraded stator which offers improved efficiency across the whole operating band and also extends the max operating rpm. This is the reason why we now only offer the upgrade motor in the fastest 6T winding.
The 500W Mac motor is recommended for use at 36V or 48V with recommended controller limit of 25-30A but this is really dependent upon the application and the motor winding that is used. For further info on suitable matching of Motor and Controller please refer to the kits section. We do recommend our Infineon EB3 controllers to ensure plug and play connections with good functionality. The slower wound motors such as 12 or 10T will work well with the 6 fet, but the 9 fet is recommended for the 8T and possibly the 12 fet for the high speed 6 T if they are used with wheels larger than 20″.
Below are the outline drawings for both front and rear Mac motors. Please note the limited space (approx 15mm) for disc brake caliper and also the small space between the non-disc side of the front motor to the dropout. Please ensure they motor is compatible before you purchase.
Mac 500W Front Motor outline drawing (with disc):
Mac 500W Rear Motor outline drawing:
6 turn high speed motor – 400rpm loaded at 36V
8 turn standard motor – 320rpm loaded at 36V
10 turn torque motor – 255rpm loaded at 36V
12 turn low speed extra torque motor – 200rpm loaded at 36V
Accepts disk brake and 7 speed freewheel with standard 135mm rear dropout.
As a guideline you can expect approximately the following real world speeds for the above windings on 12S LiFePO4 battery pack (approximately 38V under load) in a 26″ rim on the flat, no pedaling with a rider plus bike weight of approximately 130kg total (286pounds):
6T – 45kph (28mph)
8T – 39kph (24mph)
10T – 32kph (20mph)
12T – 25kph (15mph)
Spoke Radius – 172mm
Weight – 4.3kg
Black Paint Finish