Raising Hammer — The Specialised Tool of Hollowware Formation
Raising Hammer — The Specialised Tool of Hollowware Formation
A cross-peen or rounded-face hammer used to stretch sheet metal into walled vessels
A raising hammer is the specialised metalsmithing hammer used in the technique of raising — the formation of three-dimensional hollow vessels (bowls, cups, vases) from flat sheet metal by progressive hammer-forming over a stake. The hammer typically has a cross-peen or rounded-face geometry, weighs 200 to 400 grams, and is finished with a polished face that minimises marking on the work surface during forming.
Hammer geometry
The classical raising hammer has a cross-peen — a wedge-shaped striking face oriented perpendicular to the handle — that concentrates the force of each blow along a narrow line. This concentrated impact stretches and thins the metal locally, building the vertical wall of the vessel by pushing material outward and upward against the supporting stake. Some raising hammers have rounded faces rather than cross-peens for use in specific stages of the work, particularly the early shaping rounds before the wall geometry is established.
The hammer face is polished to mirror finish; any imperfection on the face transfers to the work surface as a corresponding mark. A working smith maintains the hammer faces with regular polishing and protects them from damage when not in use. Hammers used for the final planishing stages — refining the surface after raising — are even more carefully maintained, since the planished surface is often the visible finished surface of the piece.
Use in the raising process
The smith holds the work over the stake and strikes with the raising hammer in a controlled spiral pattern from the centre of the disc outward. Each blow stretches the metal in a small zone immediately under the impact point; thousands of overlapping blows accumulate to raise the wall of the vessel from the original flat disc. The pattern of blows is methodical rather than random; an experienced smith works in regular concentric rounds, advancing slightly with each round and returning to anneal periodically as the work-hardened metal loses malleability.
The hammer weight matters: too light and the smith must strike too many times to achieve significant deformation; too heavy and the smith fatigues quickly and loses control. The 200-to-400-gram range covers most raising work, with lighter hammers used for fine work in thin gauge and heavier hammers for substantial vessels in heavier gauge.
Related hammers in the silversmithing kit
The raising hammer is one of several specialised hammers used in silversmithing. Sinking hammers (similar in geometry but used for sinking rather than raising), planishing hammers (with very flat, polished faces for surface refinement), forming mallets (in wood or rawhide for shaping without marking), chasing hammers (lighter, with broad faces for striking chasing tools rather than the work directly), and various forging hammers occupy distinct positions in a working smith's kit.
A serious silversmithing studio accumulates many hammers over years of work, with subtle variations in face geometry, weight, and balance optimised for specific tasks and individual preference. The hammers are often handed down through apprentice-master relationships and represent a significant capital and traditional investment in the craft.
Selection and care
Quality raising hammers are typically forged from high-carbon tool steel and heat-treated to provide hardness in the face combined with toughness in the body. The handle is conventionally hickory or ash, fitted to the head with a wedge and finished by the smith to the preferred grip profile. Mass-produced commercial raising hammers are available from major tool suppliers; the finest examples are made by specialist toolsmiths and command prices commensurate with their craftsmanship and longevity.
Maintenance involves keeping the face polished, the handle sound and tight in the eye, and the hammer protected from corrosion and damage when not in use. A working smith inspects hammers regularly and re-polishes faces as needed; a damaged or marked face transfers its imperfections to every subsequent piece worked with the hammer until corrected.