Difference between revisions of "Early Milling Machines"
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The Wikipedia entry for [https://en.wikipedia.org/wiki/Milling_(machining) Milling (machining)] is recommended as a good source on the history of the development of milling machines. There is no point in duplicating the information presented, so this entry will be limited to some lesser-known aspects of the milling of metals. | The Wikipedia entry for [https://en.wikipedia.org/wiki/Milling_(machining) Milling (machining)] is recommended as a good source on the history of the development of milling machines. There is no point in duplicating the information presented, so this entry will be limited to some lesser-known aspects of the milling of metals. | ||
[[James Nasmyth]] wrote about a machine he built c.1830 to mill the faces of small hexagon nuts. [[Richard Roberts]] developed self-acting machines on a commercial basis to machine hexagonal and other multi-faceted components, and these were sometimes described as 'polygon machines'. They were made by firms in which Roberts was involved, namely [[Sharp, Roberts and Co]] (early 1840s), [[Sharp Brothers and Co]] (early 1850s): see [[Directory of Manchester and Salford, 1853. p33-37]], [[Roberts and Dobinson]](early 1850s). | [[James Nasmyth]] wrote about a machine he built c.1830 to mill the faces of small hexagon nuts. [[Richard Roberts]] developed self-acting machines on a commercial basis to machine hexagonal and other multi-faceted components, and these were sometimes described as 'polygon machines'. They were made by firms in which Roberts was involved, namely [[Sharp, Roberts and Co]] (early 1840s), [[Sharp Brothers and Co]] (early 1850s): see [[Directory of Manchester and Salford, 1853. p33-37]], [[Roberts and Dobinson]] (early 1850s). | ||
Richard Roberts was undertaking milling on a larger scale by 1839, when American visitor William C. Davol described Roberts's 'Cutting Engine for cutting locomotive Engine cranks, the cutter was made by having a cast Iron wheel about 18 inches in Diameter 3 1/2 to 4 In wide with cavitys cut in the edge about 3 In deep to 5/8 wide set 3 In apartround the face of the wheel to receive the steel cutters which was ruther wider than the wheel and ground sharp on three sides.'<ref>'Life and Inventions of Richard Roberts 1789-1864' by Rev. Dr. Richard L. Hills, Landmark Publishing Ltd, 2002</ref> | Richard Roberts was undertaking milling on a larger scale by 1839, when American visitor William C. Davol described Roberts's '''Cutting Engine for cutting locomotive Engine cranks, the cutter was made by having a cast Iron wheel about 18 inches in Diameter 3 1/2 to 4 In wide with cavitys cut in the edge about 3 In deep to 5/8 wide set 3 In apartround the face of the wheel to receive the steel cutters which was ruther wider than the wheel and ground sharp on three sides.'''<ref>'Life and Inventions of Richard Roberts 1789-1864' by Rev. Dr. Richard L. Hills, Landmark Publishing Ltd, 2002</ref> | ||
A number of British firms produced machines for cutting keyways and slots for cotters using rotating cutters. These were commonly called slot drilling machines. They were effectively vertical milling machines, but their makers did not develop them to increase their versatility. [[Sharp, Stewart and Co]] started making them in the mid 1850s to Sharp and Furnival's patent of 1855. An accurate large scale model from c.1857 is/was on display at the Musee des Arts et Metiers in Paris. The [[London Science Museum|Science Museum]] have a sample workpiece produced on one of these machines. Photo [https://collection.sciencemuseum.org.uk/objects/co46442 here]. | A number of British firms produced machines for cutting keyways and slots for cotters using rotating cutters. These were commonly called slot drilling machines. They were effectively vertical milling machines, but their makers did not develop them to increase their versatility. [[Sharp, Stewart and Co]] started making them in the mid 1850s to Sharp and Furnival's patent of 1855. An accurate large scale model from c.1857 is/was on display at the Musee des Arts et Metiers in Paris. The [[London Science Museum|Science Museum]] have a sample workpiece produced on one of these machines. Photo [https://collection.sciencemuseum.org.uk/objects/co46442 here]. | ||
Revision as of 10:19, 6 February 2019
The Wikipedia entry for Milling (machining) is recommended as a good source on the history of the development of milling machines. There is no point in duplicating the information presented, so this entry will be limited to some lesser-known aspects of the milling of metals.
James Nasmyth wrote about a machine he built c.1830 to mill the faces of small hexagon nuts. Richard Roberts developed self-acting machines on a commercial basis to machine hexagonal and other multi-faceted components, and these were sometimes described as 'polygon machines'. They were made by firms in which Roberts was involved, namely Sharp, Roberts and Co (early 1840s), Sharp Brothers and Co (early 1850s): see Directory of Manchester and Salford, 1853. p33-37, Roberts and Dobinson (early 1850s).
Richard Roberts was undertaking milling on a larger scale by 1839, when American visitor William C. Davol described Roberts's Cutting Engine for cutting locomotive Engine cranks, the cutter was made by having a cast Iron wheel about 18 inches in Diameter 3 1/2 to 4 In wide with cavitys cut in the edge about 3 In deep to 5/8 wide set 3 In apartround the face of the wheel to receive the steel cutters which was ruther wider than the wheel and ground sharp on three sides.[1]
A number of British firms produced machines for cutting keyways and slots for cotters using rotating cutters. These were commonly called slot drilling machines. They were effectively vertical milling machines, but their makers did not develop them to increase their versatility. Sharp, Stewart and Co started making them in the mid 1850s to Sharp and Furnival's patent of 1855. An accurate large scale model from c.1857 is/was on display at the Musee des Arts et Metiers in Paris. The Science Museum have a sample workpiece produced on one of these machines. Photo here.
See Also
Sources of Information
- ↑ 'Life and Inventions of Richard Roberts 1789-1864' by Rev. Dr. Richard L. Hills, Landmark Publishing Ltd, 2002