Archive for the ‘woodworking’ Category

Таble Saw Basics. part6

Понедельник, Январь 9th, 2012

If your fence has a width-of-cut scale, set it by measuring from a right blade tooth to the fence. This scale is a rough guide at best and should not be relied on except for rough work. For critical work (and most of it is) use a good steel rule to measure the exact distance the fence should be set from a tooth on the right side of the blade.
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Special Techniques Making the Rule Joint

Понедельник, Январь 9th, 2012

The rule joint is a traditional fine furniture feature used most commonly with tables having one or more drop leaves. When properly executed the joint makes for an especially attractive detail along the edges where the hinged leaves and fixed table surface meet. The design of the joint serves to effectively conceal the hinge plate whether the leaves are in the open or closed position.
The term «rule joint» is believed to have derived from the brass bound folding boxwood rules that were popular from the 1600′s on. The knuckles where these rules folded closely resembled the rule joint. By the time of the William and Mary period the rule joint was quite common.
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Special Techniques Making the Rule Joint. part 2.

Понедельник, Январь 9th, 2012

No matter which technique is used, the first and most important step is to correctly lay out the position of the joint. There are two key elements to consider: the hinge location and the coordinates of the radius. The thickness of the stock and the size of the bits or cutters can also be factored in, however for practical purposes we have assumed that the stock thickness will be in the area of 3/4 to 1 in., a range which encompasses the thicknesses of most common table-tops. Although theoretically the bit or cutter is determined by the stock thickness, we have found that matching 1.2i in. cove and round-over bits or cutters can be used to shape a nearly perfect rule joint in stock 3/4 to 1 in. thick. As shown in Fig. 1 the only difference will be a deeper shoulder on the thicker material.
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Special Techniques Making the Rule Joint. part 3.

Понедельник, Январь 9th, 2012

Fig. 3 shows a basic formula for locating and cutting a typical rule joint when the hinges are to be mortised in place, as they usually are. Distance A is one-half the knuckle diameter. Distances В and С are the radii of the joint and are, of course, equal to the bit or cutter size, which we have set at a constant 1/2; in. Distance D is the shoulder depth and corresponding lip thickness, which should not be less than 1/2, in. The critical point to know in all this technical talk is this: for the rule joint to open and close smoothly the center or pivot point of the hinge knuckle should be located near the intersecting point of radius lines В and C. In actual practice, when mounting the hinge it helps to cheat a little and install the knuckle a hair (‘/2 in.) toward the leaf side of the joint.
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