Hacksaw blade mainly made by three materials which are based on the cutting. The three materials are.
High Speed Steel
Carbon Alloy Steel
- Hacksaw blade could be made of carbon steel (Fully hardened saw teeth and back of blade is soft) available in wide variety of combination of width, set, pitch and thickness.
- High speed steel and bimetallic high speed steel used for high production and sawing operations. It is wear is very less and it can withstand much more heat. These blades are can cut faster, longer and more accurately.
- Carbon alloy steel (both teeth and back being hardened). Higher tension is permitted when increased tensile strength and thus the cutting accuracy is greatly improved and it is suited to contour sawing.
Cutting fluids are three types they are.
- Synthetic Cutting fluids
- Straight oils
- Soluble oils
Synthetic Cutting fluids:
The synthetic fluids are used at high speed cutting which are avoiding the heat from tool. The coolant covers and makes contact with the entire area of cut to remove maximum heat.
Straight oils are mineral oils. Straight oil has a high lubricity than heat dissipation. The straight oils are used at very tough materials cut at slow speeds. In the straight oils usually sulphur and other additives are added.
Soluble oils are mineral oils mix readily with water and the mixture has both lubricity and heat dissipating and cooling qualities.
Why cutting fluids are using
Cutting fluids are essential using in the hacksawing.
- Remove heat to prevent softening the cutting edges of the saw tooth.
- Reduce friction between chips and saw teeth while during the cutting operation.
- Cutting fluids are clear the chips away from the work piece.
- Cutting fluids are increasing the productivity and tool wear life and cutting efficiency.