Chapter X: =cutting Tools for Lathes.=

=Principles= governing the shapes of lathe tools 254
=Diamond-pointed=, or front tool 254
=Principles= governing use of tools 254
Front rake and clearance of front tools 254
Influence of the height of a tool upon its clearance and
keenness 255
Tools with side rake in various directions 256
The effect of side rake 256
The angle of clearance in lathe tools 257
Variation of clearance from different rates of feed and
diameters of work 257
=Round-nosed= tools 258
=Utmost Duty= of cutting tools 258
Judging the quantity of the tool from the shape of its cutting 259
=Square-nosed= tools 260
The height of lathe tools 260
Side tools for lathe work 261
Cutting-off or grooving tools 262
Facing tools or knife tools 262
Spring tools 263
=Brass Work=, front tools for 264
Side tools for 264
=Threading= tools 264
Internal threading tools 264
The length of threading tools 265
The level of threading tools 265
Gauges for threading tools 266
Setting threading tools 266
Circular threading tools 267
Threading tool holders 267
=Chasers= 268
Chaser holders 268
Setting chasers 268
=Square Threads=, clearance of tools for 269
Diameter at the roots of threads 269
Cutting coarse pitch square threads 269
Dies for finishing square threads 269
=Tool Holders= for outside work 270
For circular cutters 272
Swiveled 273
Combined tool holders and cutting-off tools 273
=Power Required= to drive cutting tools 273