Old School Chopper Frame Fabrication - Knucklebuster

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Figure 5 Welding supply shops also sell a host of measuring devices and tools specifically designed to be used on tubing but in most cases all we really ever need to know is where the surface centerline is on any given piece of tubing. Before going much further I have to apologize for the poor quality of the pictures and the total mess in the garage which makes it hard to see things but I'm using our second tier camera as we can't find the good one and the garage/shop looks like it's going to be used for storage for at least another month before I can get the tools and benches unpacked. One thing is for certain though and that is if I can work on a frame in this cramped space you probably can as well. Looking at our lower frame rails again take a gander at Figure 6 below.
Figure 6 In this shot I've propped-up the down tube at pretty close to the actual installed angle and even though the vantage point is off-center you can see how the upward bend in the rear portion of the rail, at the bottom of the image, lays in a true straight up and down plane and not canted to the left or right. It's almost impossible to make this bend correctly unless your bender is level and plumb. Figure 7 shows this lower rail in position. Note that we haven't trimmed off the excess tubing heading out past the location of the axle plate and we haven't bent another tube to replace the pigeon-toed rail on the opposite of the frame.
Page 1 and 2: Old School Chopper Frame Fabricatio
Page 3 and 4: 1. Steering head. Also called the s
Page 5 and 6: Figure Error! Bookmark not defined.
Page 11 and 12: Figure 11 This cross member sets th
Page 15 and 16: Figure 15 Figure 15 shows the end r
Page 17 and 18: Figure 17 There is a corresponding
Page 19 and 20: Figure 19 I call this area of the f
Page 21 and 22: Figure 23 The slope angle of the 'r
Page 23 and 24: In Figure 3 we can see the two tube
Page 25 and 26: Figure 1 shows the basic components
Page 27 and 28: an eighth of an inch clearance betw
Page 29 and 30: Figure 6 In Figure 6 we've deepened
Page 31 and 32: Figure 2 if you look closely you ca
Page 33: angle finder. It explains is easy t
Page 37 and 38: In case you're interested I messed
Page 39 and 40: Figure 3 Figure 3 depicts a plate t
Page 41 and 42: Figure 7 Figure 7 is another 'boxed
Page 43 and 44: Regardless of the style or type of
Page 45 and 46: Figure 13 At this point all you nee
Page 47 and 48: Figure 1 You'll no doubt realize th
Page 49 and 50: Figure 4 Actually the plate will be
Page 51 and 52: If you're building a frame without
Page 53 and 54: Figure 5 Now that the plates are in
Page 55 and 56: Figure 2 Clean the notch up slightl
Page 57 and 58: Figure 5 The frame in Figure 5 is o
Page 59 and 60: Figure 7 The tube in Figure 7 above
Page 62 and 63: We'll now begin doing the detail wo
Page 64 and 65: The charge has been removed from th
Page 66 and 67: Some people have reported problems
Page 68 and 69: Steering Necks For some unexplained
Page 70: Figure Error! Bookmark not defined.

Old School Chopper Frame Fabrication - Knucklebuster

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