. Canadian foundryman (1918). and is cut 8 threads to the inch, thethread having a sharp cutting edgewhich will cut easily into the wood. For small work fastening to the faceplate with wood screws is not necessary,but for larger work where the centrescrew is not enough support for the job,a combination of the tapered centre BFig. 19 and a face plate as shown in sec-tion in the diagram Fig. 23 can be used,A representing the work to be turned. When using this chuck the work willhave to be centred first and the woodscrews fastening it to the face plate driv-en in and taken out while the face plat
. Canadian foundryman (1918). and is cut 8 threads to the inch, thethread having a sharp cutting edgewhich will cut easily into the wood. For small work fastening to the faceplate with wood screws is not necessary,but for larger work where the centrescrew is not enough support for the job,a combination of the tapered centre BFig. 19 and a face plate as shown in sec-tion in the diagram Fig. 23 can be used,A representing the work to be turned. When using this chuck the work willhave to be centred first and the woodscrews fastening it to the face plate driv-en in and taken out while the face plateis on the mandrel. Fig. 21 shows a screw-centre chuck which has given good ser-vice; the part A is of brass and thecentre screw has a square head which is 18 CANADIAN FOUNDRYMAN soldered into a hole bored into the brassface. Behind the face is a hexagonalshoulder to facilitate removing the workwhile fastened to the centre face plate with a tapered shank to. mm^m \
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Keywords: ., bookcentury1900, bookdecade1910, booksubjec, booksubjectfoundries
