Specialist tools Flashcards
Marking gauge- properties, advantages and disadvantages
Used to mark a thin line into wood to map where to cut via a pin.
Its more accurate than a pencil and ruler and can switch from faces seamlessly as the stock is at a set distance.
The pin has to be sharp and can become dull.
Cutting gauge- properties, advantages and disadvantages
Used to cut a thin line into wood to map where to cut via a knife.
Its more accurate than a pencil and ruler and can switch from faces seamlessly as the stock is at a set distance. Cutting across a wood grain is better with a knife than a pin.
The knife has to be sharp and can become dull.
Mortise gauge- properties and advantages
Used to mark two thin parallel lines to map out where the chisel should remove the wood for the mortise tenon joint.
Creates two parallel lines the exact size of the chisel by moving the thumbscrew adjustment.
Odd leg calliper- properties and advantages
Used to find the centre of a circle or to mark a parallel line to the edge of a material.
Has a sharp point on the end so pencil isn’t needed and can set to desired distance. Also stiff so distance wont change.
Internal and external callipers- properties and advantages
They have curved edges facing inwards to measure internally and straight edges to measure externally/ thickness of the material.
Accurate and easy to use.
Set squares- properties, advantages and disadvantages
2 types- 30, 60, 90 OR 45, 45, 90.
Can get 30, 45 ,60 and 90 degrees angles.
Made from plastic normally so not as sturdy.
Try squares properties and disadvantages
Used to mark out right angles between a length and width.
They are only accurate on thee internal sides.
Engineers square- properties and advantages
Used to mark out right angles between a length and width.
Accurate on both external and internal sides.
Mitre square- properties and advantages
used to measure 45 and 135 degree angles.
Can make accurate joints.
Micrometer- properties, advantages and disadvantages
To measure wires to 0.01mm.
Very accurate, reproduceable results and integrated scales.
Expensive and limited range.
Vernier callipers- properties, advantages and disadvantages
To measure the internal and external size of an object to 0.01mm.
Very accurate and can do both internal and external measurements.
Can be difficult to determine which lines match up on a manual one.
Densitometer- properties
Measures transparency/ the amount of photons that can pass through the material from the light source to the photoelectric cell.
Dividers- properties and advantages
Used to mark sections the same every time but setting a distance.
Uses a pin so is more accurate than a pencil as it scores into the material.
Jigs- properties and advantages
To make multiples of the exact same without the need to mark out every time.
The same end result every time and is very accurate.
Fixtures- properties, advantages and disadvantages
Used to hold the workpiece steady and in a fixed position.
Stops the piece moving to make the cut or drilling process more accurate.
