Tools and Holding Devices

Tools and Holding Devicesg Tools
Word	Meaning	Context	More Information
"A" - clamp	"A" shaped clamping device.	"A" - clamp	These clamps are versatile and easy to use. They use a cam powered action. They prevent twisting of workpieces.
angle plate	Angle plate is used in layout work and in setting up the work piece for drilling or milling at a 90 degree to the table.	Angle plates are a common layout accessory.	Angle plate / layout
"C" - clamp	"C" shaped clamping device.	Clamping devices are used by the operator for safe handling and ease of operation.	Using "C" - clamps workpieces can be fastened to angle plates for layout operations. "C" - clamps are available from 1 to 16 inches.
center punch	Center punch is used to enlarge prick punch holes.	Center punch has an included point angle of 90 degrees.	Center punches are used to mark the workpiece prior to machining operations such as drilling and should not be used in place of a layout punch.
dividers	Dividers transfer distances directly from the rule to the work and are used to scribe equally spaced divisions. They are also used to scribe arcs and circles.	Dividers are available in various sizes.	Dividers are usually set to rules. Similar to a pencil compass, it consists of two sharp points. Points may be lightly honed for sharpness.
drill vise	Drill vise is a holding device used for clamping most workpieces while drilling.	One of the most commonly used work-holding devices is also called a drill press vise.	The vises provide the quickest and most efficient set up method for parallel work. Available in many sizes.
gooseneck clamp	Gooseneck is a hold down device used to fasten a work piece to a table.	The measuring surfaces are lapped and polished to 200 milionths of an inch.	The gooseneck clamp allows the top of the clamping bolt to be positioned below the surface to be machined.
hermaphrodite caliper	Hermaphrodite caliper locates and scribes lines in a work piece parallel to its side.	The hermaphrodite caliper can also be used to lay out the center of round stock.	Available in many sizes. Reversible for inside lines. It consists of two legs, one sharp point and the other leg is a hook.
Kant-Twist clamp	Kant-Twist clamp is a heavy duty clamping devices.	Clamping devices are used for safe handling and ease of operation.	Kant-Twist clamps weight approximately half as much as comparable C-clamps. They are superior to standard C-clamps. They eliminate distortion and twisting action.
laying out	Laying out or lay-out is the operation of transferring reference marks from a blueprint to the work piece.	The information measured and transferred must be accurate. An error in layout will result in an error in the finished part.	Accurate workmanship depends upon the ability to use the proper instruments and gages for measuring precisely.
parallel clamp	A parallel clamp is a low reach heavy duty clamping device, also known as machinist or toolmakers' clamp.	Toolmakers' parallel clamp	Clamping devices are used for safe handling and ease of operation. Stronger and smaller than a C-clamp.
prick punch	Prick punch is used lightly mark the location of holes.	The prick punch has an included point angle of 30 degree.	The prick punch is the only punch that should be used in layout. It is used to preserve the location of a layout mark while doing minimum damage to the work piece.
scriber	Scriber is a sharp, pointed tool used to draw straight sharp lines.	A scriber is used with a square rule or straight-edge for drawing straight lines. This is particularly important when laying out.	The pocket scriber can be reversed in the handle for safety. Available with carbide or hardened steel point.
step blocks	Step blocks help to support the work piece.	The height of the work piece determines the correct step block on which a clamp can be placed to secure the work piece.	Step blocks are extremely useful clamping aids. They are used in conjuction with gooseneck, "U" - clamps and strap clamps.
T-bolt	Head has a T-shape and is used to fasten work to the table.	T-slot bolt	T-bolts are used on milling machines tables and faceplates. The heads of the T-bolts often fit the slots on the drill press tables.
trammel	Trammel measures between two points and scribes circles or arcs that are too large for dividers.	Trammel	Trammel points can be attached to a bar and set to circle dimensions or they may be clamped directly by rule graduations.
transfer punch	Transfer punch used to transfer holes of any diameter from 1/16th to 2 inches.	Transfer punch set	Transfer punch can be used with any shape of hole-round rectangular, square, elongated, or tear-shaped materials up to 2 inches or 50 mm thick.
"U" - clamp	"U" shaped device for holding down a work piece. It has a continuous slot.	Clamping devices are used for safe handling and ease of operation.	One advantage of the "U" - clamp is that it can be removed without taking the nut off the T-bolt.
V-blocks	V-blocks hold round stock for layout work.	Round work pieces can be securely fastened in a set of V-blocks.	To prevent the shaft from bending under cutting pressure a V-block and screw jack can be used to support the shaft.

Source: http://precision-machining.wikispaces.com/file/view/Tools+and+Holding+Devices+Vocab.doc

Web site to visit: http://precision-machining.wikispaces.com

Author of the text: indicated on the source document of the above text

If you are the author of the text above and you not agree to share your knowledge for teaching, research, scholarship (for fair use as indicated in the United States copyrigh low) please send us an e-mail and we will remove your text quickly. Fair use is a limitation and exception to the exclusive right granted by copyright law to the author of a creative work. In United States copyright law, fair use is a doctrine that permits limited use of copyrighted material without acquiring permission from the rights holders. Examples of fair use include commentary, search engines, criticism, news reporting, research, teaching, library archiving and scholarship. It provides for the legal, unlicensed citation or incorporation of copyrighted material in another author's work under a four-factor balancing test. (source: http://en.wikipedia.org/wiki/Fair_use)

The information of medicine and health contained in the site are of a general nature and purpose which is purely informative and for this reason may not replace in any case, the council of a doctor or a qualified entity legally to the profession.

Tools and Holding Devices

The texts are the property of their respective authors and we thank them for giving us the opportunity to share for free to students, teachers and users of the Web their texts will used only for illustrative educational and scientific purposes only.

All the information in our site are given for nonprofit educational purposes