01 - The MF480 Minifan and everything necessary for assembly.
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02 - The Minifan comes with 2.5mm screws, however, most brushless motors require 3mm mounting screws as shown below. Do not purchase longer screws as they may hit the rotor inside the motor.
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03 - The fan can be balanced using strips of electrical tape. Only vinyl tape should be used as other tapes can dry out or are adversely affected by heat and humidity. The CA is applied with toothpicks to secure the tape once the fan is balanced.
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04 - An alternate method of balancing would be to use clear silicon.
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05 - Loktite is used to secure the screws. While the photo shows blue Loktite, Green Loktite is preferred as it does not attack and dissolve the plastic shroud.
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06 - A good quality prop balancer is recommended. Magnetic balancers have also been used.
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07 - The Wemotec Mini Fan 480 ducted fan assembly out of the package.
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08 - The fan includes an Intake Ring, which is normally not used with internal fan installations.
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09 - The Minifan Shroud/Stator Assembly provides mounts for the motor.
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10 - The Minifan Rotor...which is the fan unit itself. It is normal to see a small chunk of plastic removed around the center, which is part of the molding process.
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11 - The rear of the Fan. This side faces the motor and shroud.
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12 - The Minifan parts pack includes a Center Hub, Hub Screw, Motor Ring, 3mm Shaft Adapter, Shaft Washers, Fan Nut, Set Screws for the Shaft Adapter, Set Screw Wrench and two 2.5mm Motor Mounting Screws.
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13 - A Torch Set or another method of sufficiently heating the Shaft Adapter may be required.
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14 - The Shaft Adapter is slightly undersized for a tight fit and some motors may require it be heated to slip over the motor shaft.
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15 - The Shaft Adapter is shown bottomed out on the motor shaft.
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16 - A set screw is installed in one hole of the Adapter.
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17 - The set screw is tightened just enough to add friction when moving the Adapter up and down the shaft.
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18 - The motor is installed in the Fan Shroud.
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19 - The Fan Rotor is temporarily placed over the Shaft.
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20 - While pushing with your finger and thumb to keep the Fan Rotor bottomed out against the Shaft Adapter, pull both pieces out until the fan stops rubbing against the shroud.
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21 - The Pencil shows where the Fan Rotor needs to clear the Shroud around the motor mount area so it doesn't rub.
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22 - The Fan Rotor is then carefully removed without disturbing the position of the Shaft Adapter.
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23 - Fan Rotor is completely removed from the Shaft.
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24 - The Motor is then removed from the Shroud. Note the spacing that now exists between the motor and back of the Shaft Adapter. This is what was performed during the last few steps.
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25 - Loktite is applied to the set screws that are used to secure the Shaft Adapter.
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26 - Set screws are installed. Although the photo shows only the Shaft Adapter, the second screw should be added and tightened while still on the motor shaft.
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27 - It is important to clean up all excess blue Loktite as it can attack the plastic shroud. Green "plastic safe" Loktite is preferred.
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28 - The Shaft Adapter is installed on the shaft with the correct clearance from the motor.
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29 - The motor is temporarily installed in the Fan Shroud.
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30 - The pencil is used to mark the screw holes for mounting the motor. Note it can be difficult to start the screws as the motor holes are right against the outside of the mounting slots.
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31 - A toothpick is used to apply Loktite to the motor.
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32 - Loktite is applied to the threads in the motor holes you previously marked with a pencil.
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33 - Excess Loktite must been completely cleaned from the motor surface.
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34 - 3mm x 6mm screws are used to mount the brushless motor. DO NOT APPLY Loktite to these screws!
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35 - The Motor Ring that was supplied with the Fan may need sanding to fit the motor.
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36 - The ring is slipped over the rear of the motor.
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37 - The Motor Ring is used to keep the rear of the motor aligned in the Shroud so the motor isn't cocked or skewed to one side of the housing.
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38 - The motor is then installed in the Shroud's motor housing.
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39 - The 3mm motor mount screws are installed.
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40 - Both screws are installed, then tightened.
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41 - The motor is now permanently installed in the Fan Shroud. Make sure it appears centered.
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42 - The Fan Rotor is checked for balance and the lighter side, which is on top is marked with a pencil.
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43 - A strip of black electrical tape is cut and used to add weight on the light side. The tape cannot be more than 3/8" long or it will extend into the angled outer rim at the back of the rotor. This angled area must be kept clear as it recesses over the motor housing when the Rotor is installed.
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44 - Pencil shows where the tape is installed, up against the side of a molded rib. You can use wider pieces of tape if needed or you can stack two pieces to get proper balance.
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45 - The Fan Rotor is checked once again for balance. The pencil shows the location of the tape.
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46 - Once balancing has been completed, use a toothpick to apply a drop of thin CA to the tape to hold it's edges in place.
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47 - A good photo showing the outline of the tape used to balance.
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48 - The Fan Rotor is checked for final balance before installation.
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49 - The Shroud with motor is ready for fan installation.
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50 - The Fan Rotor is installed over the Shaft Adapter.
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51 - The Fan Rotor is shown installed.
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52 - Next, the supplied Washer is installed over the Shaft Adapter.
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53 - The Retainer Nut is installed on the Shaft Adapter.
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54 - There are several methods that can be used to tighten the Retainer Nut. One method is to use two additional nuts as shown and lock them at the tip of the shaft Adapter, then use a wrench to tighten the Retainer Nut.
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55 - Another method is to cut a screwdriver slot dead center in the Shaft Adapter as shown.
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56 - The slot has been cut to about 3/16" deep. The paper towel is used to prevent shavings from entering the motor.
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57 - A screwdriver is used in the slot that was just cut to hold the Shaft Adapter so it doesn't spin while the Retainer Nut is tightened.
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58 - The Retainer Nut is shown installed.
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installed. 59 - If you wish to use the Rotor Hub, you can install it now. It is a tight fit and needs to be pressed in place over the lip in the Rotor. Please note that some installations require you leave the Hub off and that installation of the hub may require re-balancing. For these reasons, it is not often used.
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60 - The supplied screw is used to secure the Hub to the Shaft Adapter. Loktite can be used on the threads at the center of the shaft adapter, but keep the screw dry.
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61 - Tighten the screw well, but do not over tighten as you may cause it to excessively recess in the tapered mount, which can cause the screw to "pop" through the center of the Hub during use.
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62 - The Hub Screw is shown installed.
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63 - Side view of the completed fan assembly.
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64 - The Wemotec Minifan 480 Completed Assembly.
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