Page:Practical Treatise on Milling and Milling Machines.djvu/178

172 Cutting Teeth in Rack, Using Rack Cutting and Indexing Attachments

The method of cutting a steel rack, using the rack cutting and indexing attachments described in Chapter V, is clearly shown in this illustration.

The rack is fastened in the vise of the attachment, and the teeth are indexed by the indexing attachment.

The automatic transverse table feed is used and the direction of cut is from the back of the rack toward the front, that is, against the direction in which the cutter rotates. Oil is used as a lubricant.