Motor Assembly

 

For 2010 model onwards

Due to the lack of supply of Fasco motors we have opted for standard supply of DC motors from the automotive industry

Motor Basics

Right - the inside of one of our motors - clearly shown is one of the two sealed ball race bearings + the brush gear which is located at the rear of the motor.

These motors are used in the automotive industry which is a much larger market than 5" gauge engine manufacturers. As such there should never be a supply issue as we have seen on many previous occassions.

Preparing the Motor

Due to the close proximity of the motor to the axle you will need to slightly modify the motors mounting ring.

Grind or file a groove as per the picture on the left. What you need to do is remove the raised lip of the exisitng mounting ring to allow the axle to pass.

The cut in the picture was made with a grinding disk and has just caught a bit too much.
Cut the three motor mount tags down using a saw or tin snips to leave only the 5mm hole.
Before fitting the motor in to the mount you will need to fit the oilite bearings to the mount. To do this we recommend using Loctite 603 bearing fit. This is oil tollerant and stands a better chance of fixing the beaings.
  • Using a round file clean out the inner faces of the beairng holes. Mainly do this to remove the slag from the laser cutting process rather than removing metal.
  • Degrease the outside of the oilite bearings and the outer face of the mount using a solvent and a clean rag.
  • Apply bearing fit to the outer face of the oilite bearing and insert the first bearing.
  • Before the Loctite sets, slide an axle through the fitted bearing and through the hole for the second. Use the axle to centre the bearing.
  • If you cannot ge the axle through the second hole remove the oilite bearing and ease the hole.
  • Now insert the second bearing by sliding it along the the axle. This method helps align the bearings in the mount. If you are having problems getting the bearing to fit, open the mounting hole up slightly with a file.
  • Remove the axle and allow the bearing fit to set.
The motor mounts shown differ as they are now supplied with a drop piece at the gear end which offers protection of the nylon gear.

Do not mount the motor at this stage.
We now supply the motors with the metal gear pre fitted. Should you wish to mount your own please note the following -
  • The gear should be 1.5mm off of the shoulder before cutting the spindle down.(width of a 6mm washer)
  • Clean spindle with clean solvent and burr the spidle with a hacksaw to help adhesion of the bearing fit
  • Clean spur gear with solvent and scratch up inner surface.
  • Do not let bearing fit run down the spindle and go towards the motor.

We can supply the gear un bored with shoulder which could be machined to provide grub or pin fixing.

 

 

OLD FASCO MOTOR CONSTRUCTION - pre 2010 models

 

 To take pressure off of the motor by clamping the spindle end in a vice and cut down the outer face of the gear with a hacksaw. Support the motor while cutting and be careful not to drop it as you cut.

Clean the end of the gear and spindle with a file and make sure there are not sharp or rough pieces sticking out
To help support the motor while drilling, stand it on three of the axle guides - as shown in the picture to the right. This will support the motor and keep it level while you drill.

If you don't have a pillar drill, then try and drill at the correct angle. Cheap pillar drills are around the £40 at most DIY superstores and are a very good investment. Once you buy one you will wonder how you ever managed without it.

Keeping the spacer between the motor and the gear, drill a 1.5 mm hole down between the spindle and the gear (as diagram below) to a depth of about 6mm.

Hold the metal gear while you drill to stop it turning on the motor spindle.

 

Once drilled remove the gear, clean and apply thread lock to gear and spindle. Leave the spacer on the motor slide the gear back onto the spindle. Line up the two halves of the 1.5 mm hole and insert a 1.5 mm pin. Make sure this pin goes in the full depth of your hole. Do not drive it in hard as you may damage the motor. The best 1.5 mm pin is the shaft of the 1.5 mm drill bit. Stick the back end of the drill bit in the hole and using a pair of pliers snap it off as close to the gear as possible.