Four toothed-wheel circular cutters

Made:
1839 in Manchester
maker:
John George Bodmer

Four toothed-wheel circular steel cutters, or milling tools, patented by John George Bodmer (Patent No. 8070) in 1839. The cutters have teeth very similar to those of a saw or file, but shaped to the profile of the spaces between the teeth of the wheel to be cut. This made them very difficult to sharpen, and for gear-cutting purposes 'hobbing' became more widely established practice, patented by Joseph Whitworth in 1835.

Details

Category:
Hand and Machine Tools
Object Number:
1857-5
Materials:
steel (metal)
type:
four toothed-wheel circular steel cutters, patented by j.g. bodmer, 1839.
credit:
Bodmer, R.

Parts

Part of a group of four toothed-wheel cutters

Part of a group of four toothed-wheel cutters

part of a group of four toothed-wheel cutters

Object Number:
1857-5/1
type:
cutter
Part of a group of four toothed-wheel cutters

Part of a group of four toothed-wheel cutters

part of a group of four toothed-wheel cutters

Object Number:
1857-5/2
type:
cutter