AUTOMATIC END HOLE TURNING

AUTOMATIC CUTTING & BEVELLING

The Automatic End Hole Turning Machine is a precision machining system designed for internal turning (boring) and finishing of holes at the ends of workpieces—such as pipes, shafts, cylindrical parts, and casings. It automates the process of turning the internal surface of an end bore to strict tolerances, ensuring consistent surface finish, dimensional accuracy, and concentricity.

This machine is ideal for high-volume manufacturing or applications where manual boring would be slow, inconsistent, or impractical. It combines robust mechanical design, CNC or servo control, tooling systems, and often in-process measurement to deliver reliable results with minimal operator intervention.

Key Features

Used for the synchronous processing of the spigot at both ends of the steel pipe.
The vertical and horizontal feeding of the tool is driven by hydraulic pressure, which produces smooth feeding with high precision.
The workpiece’s clamping, positioning, tool feeding and withdrawing are automatically done in sequence with high productive efficiency.
Safety & Protection Features — overcurrent protection, overload alarms, tool breakage detection, interlocks

SPECIFICATION

Processing Precision
Model	QJKA-159-2.2D-Z	QJKA-219-2.6D-Z
Spindle center height of the machine tool	900 mm	900 mm
Outer dia. of steel pipe	Ø76–Ø159 mm	Ø76–Ø219 mm
Length of steel pipe	200–2200 mm	200–2600 mm
Spigot depth	0–70 mm	0–70 mm
Moving speed of the slide	2000 mm/min	2000 mm/min
Spindle speed	350 r/min, 500 r/min	250 r/min, 390 r/min
Feeding speed	Hydraulic stepless adjustable	Hydraulic stepless adjustable
Cutting depth	0–3 mm	0–3 mm
Toolholder axial feeding graduate	0.05 mm	0.05 mm
Toolholder axial back-off repeated positioning precision	0.05 mm	0.05 mm
Main driving motor	11 kW 1450 r/min	11 kW 1450 r/min
Workpiece clamping motor	4 kW 1450 r/min	4 kW 1450 r/min
Hydraulic system pressure	2.5–4 mPa	2.5–4 mPa
Flow	25 L/min	25 L/min
Dimension (L×W×H)	5334×1120×1200 mm	5734×1120×1200 mm
Weight	5500 kg	5800 kg
Diameter tolerance of the spigots at both ends	IT8	IT8
Roughness of the cutting surface Ra	6.3–3.2 μm	6.3–3.2 μm
Spacing tolerance of the spigots at both ends	≤0.2 mm	≤0.2 mm

Processing Precision +
Model	QJKA-159-2.2D-Z	QJKA-219-2.6D-Z
Spindle center height of the machine tool	900 mm	900 mm
Outer dia. of steel pipe	Ø76–Ø159 mm	Ø76–Ø219 mm
Length of steel pipe	200–2200 mm	200–2600 mm
Spigot depth	0–70 mm	0–70 mm
Moving speed of the slide	2000 mm/min	2000 mm/min
Spindle speed	350 r/min, 500 r/min	250 r/min, 390 r/min
Feeding speed	Hydraulic stepless adjustable	Hydraulic stepless adjustable
Cutting depth	0–3 mm	0–3 mm
Toolholder axial feeding graduate	0.05 mm	0.05 mm
Toolholder axial back-off repeated positioning precision	0.05 mm	0.05 mm
Main driving motor	11 kW 1450 r/min	11 kW 1450 r/min
Workpiece clamping motor	4 kW 1450 r/min	4 kW 1450 r/min
Hydraulic system pressure	2.5–4 mPa	2.5–4 mPa
Flow	25 L/min	25 L/min
Dimension (L×W×H)	5334×1120×1200 mm	5734×1120×1200 mm
Weight	5500 kg	5800 kg
Diameter tolerance of the spigots at both ends	IT8	IT8
Roughness of the cutting surface Ra	6.3–3.2 μm	6.3–3.2 μm
Spacing tolerance of the spigots at both ends	≤0.2 mm	≤0.2 mm