POUNDING TOOLS

POUNDING TOOLS

•          Come with different types, weight, hammer and mallet and each with a very specific use.

•          Before using pounding tools make sure wear appropriate eye and face protection, make sure handle is secure and good condition, inspect any damage that affect safety and any other abnormalities.

•          To prevent marring the work, make sure keep the face of hammer or mallet smooth and free from dent.           

PARTS OF HAMMER

                         BALL PEEN HAMMERS

•          often referred to as the toolmakers or machinists hammer.

•          made in a variety of sizes.

•          used for forming, shaping and bending metal.

has a flat face and ball shaped end not be used to drive a nail

CROSS/STRAIGHT PEIN HAMMER

•          Similar to the ball peen hammer except that the peen is wedged shaped instead of hemispherical.

•          Cross peen hammer wedge is positioned perpendicular to the handle and straight peen hammer, wedge is parallel to the handle.

•          Used to start bends and straighten rolled edges.

CLAW HAMMER

•          Slightly crowned on the face for nail driving control and has a set of claws opposite the face.

•          Head of claw hammer is typically hardened, more brittle and easy for chipping.

•          Claws hammer should not used on hardened steel parts.

SLEDGE HAMMERS

•          Have two flat faces.

•          Sized according to weight of head without of head.

•          Used whenever a lot of heavy pounding force is needed, such as driving stakes

BODY HAMMERS

•          Also known as blandishing hammers.

•          Have two large smooth faces.

•          light weight.

•          Used to removed small dents, smooth or stretch sheet metal.

MALLETS

•          Two types: soft-faced and hard plastic tipped

•          Soft-faced: forming and shaping soft    aluminum alloy

PUNCHES

•          Not a pounding tools, made of tool steel

•          Used as variety of job from marking metal to driving out pins, used to indent material.

PUNCHES

•          Precaution when using punches

                         -      always wear eye and face protection when using punches

                         -      always using punch holder when hard blow is required to minimize the chance of injury.

                         -      shank end of punch must have a crowned shaped in order to minimize the chance of splitting or chipping

•          There are 4 types of punches.

PRICK PUNCH

•          Small sharp pointed punch.

•          Used to transfer dimensions and location on to metal.

•          Should be used with small hammer for marking follow marked with centre punch.

CENTRE PUNCH

•          Similar to prick punch but slightly thicker in diameter.

•          The point of centre punch is ground to an angle about 60° to provide an indentation that is approx. the cutting angle of drill.

•          General two type

–        1.     solid centre punch

–        2.     automatic centre punches                 

                                                    

PIN PUNCH

•          Commonly used for removing rivet from tight holes.

•          Has a flat tip and uniform shank and available in several different sizes

STARTING PUNCH

•          Flat face and taper outward to the shank.

•          Used to aid in driving bolts and pins from their hole.

TRANSFER PUNCH

•          Used to mark rivet holes when using an original template to lay out new skin pattern.

•          Diameter of shank is same as original rivet hole

•          Made of solid steel and automatic punches.

3. Holding tools

•          Made in many shape and sizes

•          Purposes as well as holding and gripping small articles in situations where it may be inconvenient to use hands.

SLIP-JOINT PLIERS

•          Length from 4 to more than 9 inches.

•          6 inch. Most commonly used.

•          Double hole design allows jaw to work in 2 position by increasing the range of the material to be gripped.

•          Should never used to turn nut which will round of the nut corner.

INTERLOCKING-JOINT PLIERS

•          Commonly called water pump pliers.

•          Used to tighten packing gland nut around water pump shaft.

•          Available in length around 5 inches to 20 inches.

•          Have a several curved grooves that make up a series of interlocking joint

VICE-GRIP PLIERS

•          Adjusted by rotating a knurled screw located in the handle.

•          Design to hold pipes, cut wire, pinch of hoses.

•          Should not use for wrench because these pliers provide very powerful clamping force.

•          Come in a variety of lengths and jaw styles.

DUCKBILL PLIERS

•          Long-handed, flat-nose

•          Typically used to twist and remove safety wire.

•          Long handle enable to grip wire while it is being twisted.

NEEDLE NOSE PLIERS

•          Come in variety of shapes and sizes with spring loaded open / closed, long thin jaws bent at right angle to the handle.

•          For electrical and electronic work.

•          Typically small enough to grip and hold small components and wires.

SAFETY WIRE PLIERS

•          Combination feature of diagonals with duckbill.

•          Built in with special twister into the handle.

•          Used to secure bolt heads or nuts with safety wire.

http://www.ziddu.com/download/21169765/tekmek.docx.html