Horizontal Boring Machine Explained

The horizontal boring machine is the most widely used type of boring machine.

Horizontal Boring Machine

The horizontal boring machine is primarily used for hole machining with an accuracy of up to IT7. It can not only expand the holes that have been cast or machined on the workpiece but also mill planes, drill, machine the outer circumferences of the end faces and flanges, and cut threads.

This machine is mainly employed in single-piece small batch production and repair workshops. The machined hole’s roundness error should not exceed 5 μm, and the surface roughness should range from Ra 0.63 to 1.25 μm.

The main parameter of the horizontal boring machine is the diameter of the main shaft.

Structure and composition

The boring machine has a horizontal spindle arrangement and the headstock moves vertically along the front pillar rail.

When operating a horizontal boring machine, the tool is fixed onto a spindle, mast or flat disk. The spindle box enables the necessary speed and feed, while the tool can be moved vertically up and down the front column guide rail.

The workpiece is secured onto the workbench, and the table can be moved longitudinally and horizontally by using the sliding seat and upper sliding seat. The table can also be rotated to the desired angle around the circular guide rail of the sliding seat, which makes it versatile for various processing conditions.

When the mast is long, the tailstock on the rear pillar can be used to support one end of the workpiece, thus increasing its stiffness.

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In order to process large holes in the workpiece or long boxes, some horizontal boring machines double the lateral stroke of the table. They also increase the width of the main guide rail of the bed, and utilize an auxiliary rail to enhance the rigidity of the sliding seat.


The appearance is beautiful and the overall layout is well-coordinated. The bed, column, and sliding seat are all rectangular rails with excellent stability. Moreover, the guide rail utilizes refrigeration hardening and high wear resistance for enhanced durability.

In addition, the digital synchronization display is intuitive and accurate, which can effectively improve work efficiency and reduce costs.

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