The Proteus Framebuilding Book - Proteus Bicycles

Recommendations

Info

column, without filing the end, you will need a way to make surethe crown remains at the right place on the column. Should thecolumn protrude beyond the crown you can always file the excessoff. Never recess the column into the crown because this will substantiallyweaken the joint. The fit between the two pieces shouldbe such that they can be put together and taken apart by hand andat the same time have as little play as possible. Now you areready to set up for brazing. If you filed your steering columnplace the column in a vise thread side down, thick walled side up.Be careful not to hurt the threads. Now put a coating of flux onthe inside of the crown and on the outside of the column, (SeeFig. 2) and assemble the pieces. Using this set up the crown willFill brass hereass comes out hereFig. 2
emain in the right place and you can use gravity to your advantageto help flow the braze material through the crown. Heat your crownon one side until most of the area around the steering column ishot enough. Usually this is when the flux on the top and bottom ofthe crown begins to turn watery. Feed the brass or silver in fromthe top and, using a stroking motion, bring it down to bottom ofthe crown. Keep adding braze material until it runs out from thebottom of the crown. This way you are assured of having completelyfilled the joint. Work your way from the center to the sides ofthe crown using the stroking motion downvyard . Thendo the sameprocedure on the other side of the crown. Allow the assembly tocool slowly, avoiding drafts.If your steering column did not need filing, use the same procedureexcept lay the assembly on the side. If you try to do thesame procedure as on the filed column, you may find that the crownwill slide down the column as you heat it. Another alternative isto pin the crown in place. To do this, position the crown as Idescribed previously. Then drill a hole through the crown and intothe steering column. Put a nail in the hole and this will hold thecrown in place while you braze. On crowns that do not have predrilledbrake holes the pin hole should be drilled where the brakehole is finally drilled, leaving a cleaner looking piece. Any excessbraze material, flux, or protrusion of the steering column should beremoved now.The next step is to attach the drop outs to the fork blades.First;, having decided on the rake, you will either leave the bladethe way it is, or cut off enough to make the correct rake. Be carefulnot to cut off so much that the fork blades will be too short.55
Page 1:
7PROTEUS DESIGN INC.THE PROTEUSFRAM
Page 5:
I would like to thank the following
Page 9:
Painting''Metal Preparation 77Apply
Page 12 and 13:
Just get ones with metric, or Engli
Page 14 and 15: ,It is not necessary to use differe
Page 16 and 17: .frame more responsive and less ene
Page 18 and 19: The other consideration, clearance,
Page 20 and 21: Thisthe axle center to the ground.
Page 22 and 23: connecting the center of the bottom
Page 24 and 25: Roadgauge of tubing. Most sets avai
Page 26 and 27: efore any damage will occur. So eve
Page 28: The first miter you will work on is
Page 31 and 32: the bottom bracket shell and hold t
Page 33: Preparing the LugsThe next step is
Page 36 and 37: CenterlineFig. 3If possible, use so
Page 38 and 39: area where the clamp was. Turn the
Page 40 and 41: .8the frame will have cooled enough
Page 42 and 43: .touch anything. You don't have to
Page 44 and 45: kept in mind. First, the style of j
Page 46 and 47: The dropout may be able to swing a
Page 48 and 49: Using the scribe marks as a guide,
Page 50 and 51: Gently remove the wheel. Don't worr
Page 52 and 53: and bend the dropout to correct the
Page 54: that you are ruining your frame. Th
Page 58: .Use a small round file for this. T
Page 61 and 62: crushed. At this point the end shou
Page 63: especially true with silver, which
Page 68 and 69: .is much easier to work on them whe
Page 71 and 72: the board. (See Fig. 5B.)Lay the st
Page 73 and 74: Fixing the 2" x 4" axle assembly to
Page 75 and 76: Correct blade angle ,. WrongangleFi
Page 77 and 78: the right and left measurements are
Page 79 and 80: ItLots of points, you may want to s
Page 81 and 82: the lugs and fork crown. For final
Page 83 and 84: PointsNext, using a curved or large
Page 85 and 86: frame. Two popular styles are domed
Page 87 and 88: IPaintingrub your fingers over all
Page 90 and 91: .necessary to use small pieces of s
Page 92 and 93: Fig 2
Page 94 and 95: .wascomplete.Applying the PrimerA p
Page 96 and 97: .ofthink it'd be clean. Chances are
Page 98 and 99: a similar method. At- this point it
Page 100 and 101: To..only exposed a few tiny spots o
Page 102 and 103: Peoplepaint to give a bright, shiny
Page 104 and 105: OneAcrylic.and the frame can be bui
Page 106 and 107: the frame members apart. The diffic
Page 108 and 109: \bottom bracket or the seat tube ou
Page 110 and 111: Seat & Chain Stays 4 piecesFork Col
Page 112: Proteus Design framebuilders are pr
show all

The Proteus Framebuilding Book - Proteus Bicycles

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?