lo Nov., 191 1.] 



Farm Blacksmithiiig. 



19 



FARM BLACKSMITHING. 



{Cuntinucd from fagc 689.) 



George Baxter, Instructor in Blacksmii/u)ig, Working Men's College, 



Melbourne. 



F RG T X G — ( c ontinued) . 



Bending Bars. 



When it is desired to bend a pieie of iron or steel at a r^iven point, 

 for instance, in the case of wall-lirackets, pole-clips, &l., it is essential 

 that the heat be confined to that part only. To do this in the fire alone 

 would, in nearly all cases, be impossible, on account of the heated part 

 being longer than necessary, due to the spreading of the fire and to the 

 conductivity of the metal. 



To obtain the correct length of heated iron to make a neat bend with 

 a minimum of labour, the metal should be rai.sed to bright red ; .and, after 

 removal from the fire, taken to the cooling tub where it should be cooled 

 off on each side of the mark, leaving the length of heat eriual to alwut 

 one and a half times the thickness of the bar. 



^ 



31. BRACKET FOR SHELF. 



32. FORK TOOL. 



l'"ig. 31 shows a bracket lor a shell, where each arm is 6 in. long 

 and the metal \\ in. x \ in. The iron should be cut off to the length, 

 which in this case would be ni in. — the di.stance from each end to the 

 centre of lx;nd. The position of the benrl is now marked with a centre 

 jAuich and, after healing and cooling as stated above, it is quickly taken to 

 the anvil and bent <)\er the edge with a hammer ; or it may be grippt'd 

 in tiie vice .md ])ulleil to the angle required ; or. instead of the vice, in 

 ./ fork tool (Fig. 32). 



\\\ bending bv this method, the success depends largely (tn (|ui(kness 

 .'tfter leaving tiie fire. If the part which is to form the corner is allowed 

 to get black it will not bend at the exact spot, and as such a small portion 

 of the b.ir is leli hi)! it is .videiit that it would s(N)n cool out by the he;i' 

 i)ping conducted to the colder portion of the bar. 



A pole-clip (Fig. 33) is a little more difficult to make on account of 

 there fieing tour bends, the position of each of which is imi)ortant to the 

 result. If one l)e made according to the dimcnsiens s!iown on the sketch, 

 the renuired si/e of inm would be 2 in. x \ in. 



