Design and Plans
Manufacturing Spreadsheet

Main Frame Worksheet

Part/Assembly Name Quantity per Chair Material
Sequence #
Manufacturing Sequence Equipment Used
Top/Down Tube 2 Steel Tubing 1 Cut to rough length Tubing Cutter
2 Bend Tubing Bender
3 Miter end Mill
4 Cut to finished length Tubing Cutter
Bottom/Back Tube 2 Steel Tubing 1 Cut to Rough Length Tubing Cutter
2 Bend Tubing Bender
3 Miter end Mill
4 Cut to finished length Tubing Cutter
Side Tube 2 Steel Tubing 1 Cut to length Tubing Cutter
2 Miter ends Mill
End Caps 4 Delrin or Nylon 1 Machine Lathe
Axle Plate 2 Steel Plate 1 Cut stock to size Band Saw
2 Drill holes Mill or Drill Press
Caster Plate 2 Steel Plate 1 Cut stock Band Saw
2 Mill to size Mill
3 Drill holes Mill or Drill Press
Crossbrace Bracket 4 Steel Plate 1 Cut stock Band Saw
2 Miter Mill
3 Drill & bore Mill
Seat Gusset 2 Steel Plate 1 Cut stock Band Saw
2 Mill to size Mill
Seat Bracket 4 Steel Plate 1 Cut stock Band Saw
2 Mill to size Mill
Main Frame Assembly 1 Place top/down tube, bottom/back tube & side tube in jig Custom Built Jigs and Welding or Brazing Equipment
2 Braze or weld all joints
3 Locate caster plate in jig
4 Braze or weld all joints
5 Locate seat gusset in jig
6 Braze or weld all joints
7 Locate crossbrace brackets in jig
8 Braze or weld all joints
9 Locate seat brackets in jig
10 Braze or weld all joints
Chair Assembly Main Frame Caster Assembly Crossbrace Assembly Footrest Assembly