Hacksaws

Introduction

Hack sawing is a process of cutting metals to size. It uses a long blade mounted in a bow-shaped frame. Cutting takes place using a reciprocating, or back-and-forth motion.

Types of hacksaw frames

There are two types of hacksaw frames:
1- Solid hacksaw frame.
2- Adjustable hacksaw frame.

Hacksaw blade pitch

1- Coarse pitch teeth:
has 14-18 teeth/25 mm.
2- Medium pitch teeth:
has 18-24 teeth/25 mm.
3-Fine pitch teeth:
has 24-32 teeth/25 mm.

Blade setting

1- Alternate set:
The teeth are arranged alternately.
2-Wave set:
the teeth are arranged in
a wave form.

Cutting with the hacksaw

1- Hold the hacksaw properly at an angle of 30 degrees.
2- When cutting, let your body sway ahead and back with each stroke.
3- Apply pressure on the forward stroke, which is the cutting stroke.
4- Use the entire length of the blade in each cutting stroke.
5- The usual cutting speed is from 40 to 50 strokes per minute.