Below are given instructions on obtaining the correct bevel for making 3 in. stock hoops for heavy wheels. Fig. 1 is a side view of a stock hoop, 3 in, wide, 1 ft. in diameter at the back, and 10 in. diameter at the front. First set out the half elevation, as shown at the top part of Fig. 2: then, using G as centre, with a radins of half the diameter of the back of the hoop, strike the line A v.. From the same centre, with a radius of half the diameter of the front of the hoop, strike the inner line ae, thus obtaining a quarter plan of the part cone formed by the hoop. Divide the quarter circle as shown at B b, C c, D d, E e , also connect A and b by a cross line; this line measured across, and marked on the horizontal line from G to F, and connected to the vertical line at the top centre of the elevation, will give the diagonal line to be used in making the pattern (Fig. 3). To make this, draw a vertical line A a (Fig. 3) equal in length to the line AH in Fig. 2. With the line FJ (Fig. 2) as radius, and A (Fig. 3) as centre, describe arcs at b b (Fig. 3). With a (Fig. 3) as centre, and the distance a b (Fig. 2) as radins, cut the arcs at b b which are ou the bottom of the pattern. Then from bb, with the length of A a (Fig. 3) as radins, describe arcs at B B. Take the length A B (Fig. 2) as radins, with A (Fig. 3) as centre, cut the arcs drawn at B B, which will be points on the top of the pattern; repeat this each side of the centre until several points are found, when the points can be connected by a true sweep. Fig. 3 is the shape to which the hooping must be made before it is turned round; of course, allowance must be made for bending and welding up. When making hoops as above described, an iron mandril (as Fig. 4), known also as a sugar-loat casting, is of great assistance.

How To Make Bevelled Stock Hoops 684How To Make Bevelled Stock Hoops 685How To Make Bevelled Stock Hoops 686Making Bevelled Stock Hoops.

Fig. 4. Making Bevelled Stock Hoops.