HOLDING WORK Flashcards
What is a woodworking vice?
A vice that is fitted to a bench so the jaws are level with the top.
Why do pieces of material need to be held firmly and securely in most cutting and drilling operations?
To avoid damage and for safety
Why are the ‘cheeks’ of a woodworking vice made of wood?
So they can be easily replaced when worn
What is a common feature of many woodworking vices?
A quick release mechanism which overrides the screwthread and allows the jaws to be opened or closed rapidly prior to tightening
What is a metalworking vice?
It is bolted to surface of a bench and is normally fitted with ‘soft jaws’ eg aluminium
Why is a metalworking vice normally fitted with ‘soft jaws’ eg aluminium?
It prevents the hardened steel jaws damaging the work. The vices are made in cast steel and can exert a holding force of well over a tonne.
Describe a bench holdfast
Has a single leg which fits into a metal-lined hole in the top of the bench.
Tightening the screw twists the leg at an angle in the hole, and the holdfast locks solid.
When is a bench holdfast especially useful?
Where work needs to sit flat on the bench surface.
What is a bench hook used for?
Mainly for sawing wood.
How is a bench hook used?
A bench hook is held by one hand against the top stock while the bottom stock is held securely in a wood working vice.
What are machine vices designed for?
To hold work for drilling or other machining operations
Why is a machine vice especially important?
To hold the work securely since a drill, for example, will try to spin the work around
What can a machine vice on a pillar drill be held securely in position with?
A G cramp
Name the 3 types of tools you would use to fasten work together?
Sash Cramp
G Cramp
Toolmaker’s Clamp
What a sash cramps used for?
Cramping longer lengths of wood.
