Question
Download Solution PDFIn 25 TPI hacksaw blades, the distance between two adjacent teeth is _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Hacksaw frame:
- A hacksaw frame is used along with a blade to cut metals of different sections and is specified by the type and maximum length of the blade that can be fixed.
- A hacksaw blade is made of either low-alloy steel (LA) or high-speed steel (HSS), and is available in standard lengths of 250 mm and 300 mm.
Pitch of the blade:
- The distance between adjacent teeth is known as the ‘pitch’ of the blade.
- We know that, 1 inch = 25.4 mm
- In 25 TPI (teeth per inch length) hacksaw blades, i.e. in 25.4 mm, 25 teeth of hacksaw are available.
- Therefore, Pitch = 25/25 = 1 mm
- The Hacksaw blade pitch to cut conduit and other thin tubes is 0.8 mm.
- For tool steel, high carbon, high-speed steel, etc. use a 1.4 mm pitch.
- For angle iron, brass tubing, copper, iron pipe, etc. use a 1 mm pitch blade.
Pitch =
|
Classification |
Pitch |
|
Coarse |
1.8 mm |
|
Medium |
1.4 mm & 1 mm |
|
Fine |
0.8 mm |
|
Pitch |
Type of set |
|
0.8 mm |
Wave set |
|
1 mm |
Wave set or staggered set |
|
Over 1 mm |
staggered set |
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