Tools and Holding Devices

Text-based version

Tools and Holding Devicesg Tools
More Information
"A" - clamp "A" shaped clamping device.

Image of "A" clamp

"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.

Image of angle plate

Angle plates are a common layout accessory.

Image of angle plate

Angle plate / layout

"C" - clamp "C" shaped clamping device.

Image of "C" clamp

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.

Image of center punch

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 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.

Image of divider

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.

Image of drill vise

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.

Image of gooseneck clamp

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.

Image of hermaphrodite caliper

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.

Image of Kant-Twist clamp

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.

Image of parallel 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.

Image of prick punch

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.

Image of scriber

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.

Image of step blocks

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.

Image of T-bolt

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.

Image of 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.

Image of transfer punch

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.

Image of

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.

Image of V-blocks

Round work pieces can be securely fastened in a set of V-blocks.

Image 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.