The spur center is a very important part of the lathe. It should be shaped so it will enter the wood easily and hold securely. The one shown in Fig. 297 is a good design. The center point should be a separate piece and should be easily removed for sharpening or replacing.

Fig. 297. Spur Center.

The point should be of steel, but not necessarily tempered.

In placing the spur center in position in the arbor, do not drive it with a hammer or a mallet, for the pressure against it in placing the wood between the centers will be sufficient to force it tight enough to not slip while in use.

The spur center should be removed by driving a key, made for this purpose, into a hole in the side of the arbor and against the end of the center. Some centers have a square part and are removed by using a wrench.

Some lathes are supplied with several spur centers, but for all ordinary turning, one is sufficient.