#STUD EXTRACTOR PDF#
#STUD EXTRACTOR PORTABLE#

#STUD EXTRACTOR PORTABLE#

B25- HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS.229920000638 styrene acrylonitrile Polymers 0.000 description 1.238000006011 modification reaction Methods 0.000 description 1.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Elmer M Doan filed Critical Elmer M Doan Priority to US436595A priority Critical patent/US1815500A/en Application granted granted Critical Publication of US1815500A publication Critical patent/US1815500A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US436595A Inventor Elmer M Doan Original Assignee Elmer M Doan Priority date (The priority date is an assumption and is not a legal conclusion.

#STUD EXTRACTOR PDF#

Another tool for a stuck nut on a bolt, but not a screw, is a nut splitter.- Google Patents US1815500A - Stud extractorĭownload PDF Info Publication number US1815500A US1815500A US436595A US43659530A US1815500A US 1815500 A US1815500 A US 1815500A US 436595 A US436595 A US 436595A US 43659530 A US43659530 A US 43659530A US 1815500 A US1815500 A US 1815500A Authority US United States Prior art keywords shank body member stud conical jaws Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. These flutes or grooves grip the rounded nut from the outside, rather than being driven into the hollowed out screw shaft and taking hold of it internally as a screw extractor would.

A tool analogous to a screw extractor, but for removing a seized or rounded off nut from a bolt, would be a nut extractor, which has tapered, spiral flutes like a screw extractor, but located internally in the tool, not externally. A screw extractor would not be used to remove a bolt because it is not threaded into the parts.

While screws thread into parts, bolts are used to join two non-threaded parts, typically using a nut. While screws are often colloquially referred to as bolts, they are not the same. This size is often non-standard for most drill sets, requiring a dedicated drill bit to be supplied with the kit. These work well, but have the drawback of requiring the pilot hole to be drilled to a precise size. A further form is a parallel fluted extractor, with no taper at all and thus no wedging. Straight fluted extractors have less wedging effect than tapered screw extractors, so have less tendency to lock the screws into place. The nuts can then be turned with a wrench to remove the screw. The appropriate special nut is then attached to the end of the extractor. The extractor is then hammered into the hole with a brass hammer, because a steel hammer is more likely to cause the extractor to break. The screw is drilled out with the appropriate drill and drill bushing. Straight fluted extractors may come in a kit that also has associated drills, drill bushings, and special nuts, or be sold individually.