Henry James Original Frame and Fork Building Jig

Key Features and Benefits:

Clamp Blocks:

The Jig comes with 3 Clamp Blocks. The blocks have saddles in each edge for different tube diameters:

The Top Tube Block accepts 1", 1 1/8", 1 1/4", and 1 1/2" (25.4, 28.6, 31.8, 38.1 mm.) tubes
The Down Tube Block accepts 1 1/8", 1.1811", 1 1/4", and 1 3/8" (28.6, 30, 31.8, 35 mm.) tubes
The Seat Tube Block accepts 1 1/8", 1 1/4", and 7/8" (28.6, 31.8, 22.2 mm.) tubes

The frame tubes are held 2" (50.8 mm) clear of the Main Jig PLate, giving excellent access.

Compact Jig Plate Design:

The Henry James Universal Frame Jig is still based on a .75" (19mm) thick aluminum plate. The compact design means that you have easy access to all the joints. Lugged frames can be completely constructed in the Jig. The Jig is designed to work equally well for steel, aluminum, and titanium frames. The Jig is designed to allow many approaches to frame construction. The complete Jig weighs 65 pounds (30kg). The Jig is designed to mount on a Frame Repair Stand made by Park Tool . This is a big advantage over other frame jigs that require expensive special mounting devices.

For Lugged, Fillet Brazed (Lugless), and Welded Frame Construction:

The Henry James Original Frame Jig works for all these frame joint technologies. The compact design provides plenty of access for any technique. For lugged construction, the frame can be completely assembled in the Jig. For Fillet brazed & welded construction, the Jig is typically used as a tacking jig. This is not a limit of the Jig, but is due to the nature of the joining method. A major advantage of the Henry James Jig is that it does not rely on how accurately the tubing is cut and mitered when setting up the Jig. Competitive jigs can rely on the tube lengths and miter angles. The problem is that if there are small errors, you will tend to move the tubes around until they fit, and the geometry will not be what you intended. With the Henry James Jig, you set up the Jig without relying on how well the tubes are cut and mitered. Then you install the tubes. If anything is too tight or too loose, you see it. Now you check to determine whether you made the mistake in cutting the tubes or setting up the Jig. You correct the error, and assemble the frame with confidence.
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Jig Plates:

The Jig Plates are made from Cast Aluminum Tooling Plate, an alloy designed for dimensional stability and resistance to warpage. These Plates are Blanchard ground flat on both sides. This ensures a long lived and accurate Jig.
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Park Stand Information:

The Clamp Head must be the old style 110-3C or the new 110-5C design. These clamps use a threaded toggle link to adjust the clamping force. This allows you to rotate the Jig to the desired position while you work. The Clamp heads with the self-adjusting spring mechanism do not work with our Jig. You gain several advantages with our mounting approach: You most liklely already have a Park Stand. The Park Head is designed so you can orient the Jig vertically, and also tip it horizontal, like a table top. (This makes it easy to set up the Clamp Blocks.) | BACK |

Using Jig for Different Joining Methods:

Welding & fillet brazing require that gravity be used to assist in making the bead or fillet. To go all around a joint requires rotating the joint 360°. Thus welders always tack weld the frame in the Jig and then move over to a welding table. Fillet brazers first brass braze the joints, but do not build up the fillets, in the Jig and then free braze the fillets (usually in a Park repair stand.)

Plumbing for purging gas can be added to use the Jig for Titanium construction.

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