About: Jig borer

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The jig borer is a type of machine tool invented at the end of World War I to enable the quick and precise location of hole centers. It was invented independently in Switzerland and the United States. It resembles a specialized species of milling machine that provides tool and die makers with a higher degree of positioning precision (repeatability) and accuracy than those provided by general machines. Although capable of light milling, a jig borer is more suited to highly accurate drilling, boring, and reaming, where the quill or headstock does not see the significant side loading that it would with mill work. The result is a machine designed more for location accuracy than heavy material removal.

Attributes	Values
rdf:type	software yago:WikicatMachineTools yago:Artifact100021939 yago:Device103183080 yago:Instrumentality103575240 yago:Machine103699975 yago:MachineTool103702248 yago:Object100002684 yago:PhysicalEntity100001930 yago:Whole100003553
rdfs:label	Machine à pointer (fr) Jig borer (en)
rdfs:comment	La machine à pointer a pour but de situer matériellement, avec une très grande précision, l’emplacement d’un point défini par ses coordonnées polaires ou rectangulaires. (fr) The jig borer is a type of machine tool invented at the end of World War I to enable the quick and precise location of hole centers. It was invented independently in Switzerland and the United States. It resembles a specialized species of milling machine that provides tool and die makers with a higher degree of positioning precision (repeatability) and accuracy than those provided by general machines. Although capable of light milling, a jig borer is more suited to highly accurate drilling, boring, and reaming, where the quill or headstock does not see the significant side loading that it would with mill work. The result is a machine designed more for location accuracy than heavy material removal. (en)
dcterms:subject	Machine tools Hole making
Wikipage page ID	7008837 (xsd:integer)
Wikipage revision ID	1102403230 (xsd:integer)
Link from a Wikipage to another Wikipage	Numerical control Micrometer Tool and die maker Machine tool Computer-aided design Computer-aided manufacturing Franklin D. Jones Leadscrew Jig (tool) Jig grinder Machine tools Hole making Milling machine Marking out CNC dbr:Moore_Special_Tool_Company
sameAs	Jig borer Jig borer Jig borer Jig borer Jig borer
dbp:wikiPageUsesTemplate	dbt:Convert dbt:Reflist dbt:Sfnp dbt:Short_description dbt:Metalworking_navbox dbt:Machine_and_metalworking_tools
has abstract	The jig borer is a type of machine tool invented at the end of World War I to enable the quick and precise location of hole centers. It was invented independently in Switzerland and the United States. It resembles a specialized species of milling machine that provides tool and die makers with a higher degree of positioning precision (repeatability) and accuracy than those provided by general machines. Although capable of light milling, a jig borer is more suited to highly accurate drilling, boring, and reaming, where the quill or headstock does not see the significant side loading that it would with mill work. The result is a machine designed more for location accuracy than heavy material removal. A typical jig borer has a work table of around 400 by 200 millimetres (15.7 in × 7.9 in) which can be moved using large handwheels (with micrometer-style readouts and verniers) on particularly carefully made shafts with a strong degree of gearing; this allows positions to be set on the two axes to an accuracy of 0.0001 inches (2.5 μm). It is generally used to enlarge to a precise size smaller holes drilled with less accurate machinery in approximately the correct place (ie with the small hole strictly within the area to be bored out for the large hole). Jig borers are limited to working materials that are still soft enough to be bored. Often a jig is hardened; for a jig borer this requires the material to be bored first and then hardened, which may introduce distortion. Consequently the jig grinder was developed as a machine with the precision of the jig borer, but capable of working materials in their hardened state. (en) La machine à pointer a pour but de situer matériellement, avec une très grande précision, l’emplacement d’un point défini par ses coordonnées polaires ou rectangulaires. (fr)
gold:hypernym	Equipment
prov:wasDerivedFrom	wikipedia-en:Jig_borer?oldid=1102403230&ns=0
page length (characters) of wiki page	4778 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Jig_borer
is Link from a Wikipage to another Wikipage of	Pratt & Whitney Measurement Systems Machine tool Machine tool builder Wayne Moore (swimmer) Jig (tool) Jig grinder Job shop Boring (manufacturing) Milling (machining)
is foaf:primaryTopic of	wikipedia-en:Jig_borer

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