This tool has been made by me in 6" and 9" forms as drawn.
The accuracy of the component produced is only as good as the accuracy of the 1" hole pitch distances and the parallelism relative to the 1/2" datum dimensions therefore I suggest the holes are spot drilled through a new’ish No 1 strip with it securely clamped to the bars using either mole grips or toolmakers clamps with reference to the 1/4" dimensions at the ends and top (Right on drawing)
All methods and sizes used to make all
parts are as described and any deviation there from
will be at the makers discretion.
Note A - Shim - same thickness as the
plate to be bent, fitted to one block
only. To ensure parallelism when a component is being ‘operated’ upon.
Fix with double sided adhesive tape or super glue for ease of use.
* Note B -The 3" dimension allows for clearance to the edge of the Vice jaws when the tool is in use.
Note C - dotted line through refers to the 1/2" wide No.1 strip used as the spot drill template on both bars or the minimum bar stock material size which on my examples is as follows:
1/2" square B.M.S. (Bright mild steel)
2 x 6" lengths
1" x 1/2" as drawn B.M.S. 2 x 9" lengths
HOLES - Depth _" Ref This dimension is applicable and important on the short version or any using 1/2" square material. It should be drilled 1/2" deep + 1/16" ? 0
If the 9" version is made the 6 holes
may be drilled through as Mechanical strength will not be affected.
Two or three Ø4 silver steel locating pegs are required. These should be fitted to the end and centre holes of the plate when in position for what I call ‘ouching’
The 3" dimension refers only to the holding
area when gripped in the Vice. The plate is sandwiched between the two
tool bars and the exposed area of the plate is ‘dressed’ down to the top
of the bars with a fairly heavy plastic headed hammer and mine are
usually finally flattened with a piece of 1/2" x 1/4" B.M.S. flat.
NOTE - Use second hand parts as you will
definitely need to re-paint !
Use a G cramp on the exposed bars to prevent
opening after ‘sandwiching’ when the work piece is being worked on.
