This document discusses different types of boring machines used to enlarge holes through turning operations. It describes horizontal boring machines, vertical boring machines, precision boring machines, and jig boring machines. Key components of boring machines are also identified, including the bed, floor plate, base, table, column, head stock, end supporting column, and cross rail. A jig boring machine is highlighted as a precision machine used for boring accurate holes at proper center-to-center distances within a tolerance of 0.0025mm.

1. MAHA BARATHIO ENGINEERING
COLLEGE,
CHINASALEM TK.,VILLUPURAM DT.,
Pre pared by:-
l.NARAYANAN,M.E.,
ASST. PROFESSOR
Dept. of mechanical Engg

2. BORING MACHINE
• When internal surface
of a hollow part is
turned, a single point
cutting tool is used for
enlarging a hole, the
operation is called
BORING
• The bar on which
single point tool is
mounted is called
BORING BAR

3. Types of Boring Machines
(a) Horizontal Boring Machine ( HBM )
1. Table type HBM
2. Planer type HBM
3. Floor Type HBM
4. Multiple Spindle HBM
(b). Vertical Boring Machine ( VBM )
1. Single Column VBM
2. Double Column VBM
(c)Precision boring machine
(d)Jig boring machine

4. Table type
Horizontal Boring Machine ( HBM )

6. Components of a Boring Machine
• Bed
• Floor Plate
• Base
• Table
• Column
• Head Stock
• End Supporting Column
• Cross Rail

7. Planer type HBM

8. Floor Type HBM

9. Multiple Spindle HBM

10. Double Column VBM

11. JIG
BORING
MACHINE

12. It is a precision boring machine
used for boring accurate holes
at proper center-to-center
distances.
A machine produced in holes of
within the range of 0.0025mm.
JIG BORING MACHINE

13. JIG
BORING
MACHINE