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"For brass or other soft metals there may be used with advantage a twist drill as shown. The cutting edges of the drill are ground straight and in line with the body of the drill for a distance of 0.03 to 0.06 in. = 0.8 to 1.6 mm. This prevents the breaking of the drill when it goes through the work—piece." —Grimshaw, 1902

Twist Drills for Brass

"For brass or other soft metals there may be used with advantage a twist drill as shown. The cutting…

This old Persian jar is made with a repousse copper technique. It is a metalworking technique shaped by hammering from the reverse side.

Old Persian Jar

This old Persian jar is made with a repousse copper technique. It is a metalworking technique shaped…

A face plate for milling on a lathe. The circular blades used for milling can be adjusted by using loosening or tightening the nuts for different cuts.

Relieving Milling Cutters Lathe

A face plate for milling on a lathe. The circular blades used for milling can be adjusted by using loosening…

A marking gauge is used in woodworking and metalworking to mark out lines for cutting or other operations. In metalworking it can be known as a scratch gauge. The purpose of the gauge is to scribe a line parallel to a reference edge or surface. It is used in joinery and sheetmetal operations.

Marking Gauge

A marking gauge is used in woodworking and metalworking to mark out lines for cutting or other operations.…

A stepped hole punch tool used to make holes in metal plates. The plate (B) is placed under the grip (K), and the hole is made by pushing (G) to the metal to the desired diameter determined by the steps.

Stepped Hole Punch Tool

A stepped hole punch tool used to make holes in metal plates. The plate (B) is placed under the grip…