600W Electric Trike

Step 5 The seat and its fixing

This part I will be explaining making the seat mount for a standard school chair. The chair had two tubes that went across the underneath that I could use for a simple mount to be welded to. The mount has several holes that bolts go through into the main frame for adjustment.

Tools:

- Automatic Hacksaw/ normal hacksaw
- Scriber
- Steel Rule
- Engineer’s square
- File
- Pillar drill/ bench mounted hand drill
- Centre punch
- Movable vice
- Drill bits
- Ball pein hammer
- MIG welder
- Small G clamps
- Bench vice
- Welding equipment

1. Mark out length angle iron according to your chair with scriber and measurement tools
2. Cut with hacksaw in the bench vice
3. File off burring for good finish and for no sharp edges
4. Mark out hole destinations for the bolts that keep the seat coming off the trike with measurement tools and centre punch.
5. Mount in vice clamps and drill out required holes with smaller pilot holes for accuracy. Then drill out fully.
6. The hard bit is getting the holes aligned with the holes that will be drilled in the main frame tube. Again these need to be measured and centre punch carefully, pilot holed then drilled fully. Test the mount in the frame and see if the holes work with the bolts. If its hard getting them DON'T wack them in with a hammer. Use a round file to adjust the holes so that you can slide the bolts in nicely without ruining the threads!

7. The mount needs to be welded to the bottom of the seat. Use your head and get clamp the mount to the seat for welding. Tack weld then fully weld the mount, CHECK that it still fits when you've tacked welded. ALSO before welding make sure any paint on the seat tubes is filed/ sanded off for a neater weld.

DONE!