CNC Vertical Honing Machine For Hydraulic Cylinder

2MK2240 × 400 mm CNC Vertical Honing Machine

High-Precision Vertical Honing for Hydraulic Cylinders and Short Deep Bores

The 2MK2240 CNC Vertical Honing Machine is designed for high-precision honing of deep-hole components and is particularly suitable for hydraulic cylinders, spindle bores, cylinder bores, cooling holes, and other precision internal bores.

With a honing diameter range of Ø100–400 mm and a maximum honing depth of 400 mm, the machine is ideal for short and medium-length through bores where high dimensional accuracy and excellent surface finish are required.

The machine can perform both full-length honing and local honing, allowing correction of taper, ovality, and localized dimensional errors in the bore.

Key Performance

Honing diameter: Ø100–400 mm

Maximum honing depth: 400 mm

Workpiece outside diameter: Ø120–500 mm

Workpiece length: 50–400 mm

Bore accuracy: IT7–IT9

Surface roughness: Ra 0.4–1.6 μm

Honing spindle speed: 5–200 rpm, stepless

Honing stroke speed: 1–32 m/min

Maximum workpiece weight: 300 kg

Main spindle motor: 8.0 kW

Total machine power: approx. 21 kW

The above performance and application data are based on the supplied technical proposal.

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Rigid Machine Structure for Long-Term Accuracy

The machine adopts a rigid box-type structural design. The main castings-including the base, worktable, spindle head and column-are manufactured from high-strength cast iron using resin sand casting.

The castings undergo normalizing treatment after casting and again after rough machining to effectively relieve internal stresses and improve long-term dimensional and accuracy stability.

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Servo-Controlled Honing Expansion System

The servo expansion system provides precise control of the honing tool expansion.

Driven by a servo motor, precision planetary gearbox and ball screw, the system supports both:

Constant-pressure honing

Constant-amount honing

This enables stable and accurate control of the honing process and helps achieve consistent bore dimensions and surface quality.

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High-Response Reciprocating System

The spindle head is driven along the column by a servo motor, gearbox and ball screw system.

The spindle motor is mounted on the column rather than moving together with the spindle head. Power is transmitted through a synchronous belt and ball spline, reducing the moving mass and improving the dynamic response of the reciprocating system.

The machine provides a minimum reciprocating stroke of 1,200 mm, with a reciprocating speed range of 1–32 m/min.

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Efficient Coolant and Filtration System

The machine uses an external oil-supply system to deliver honing oil directly to the machining area.

The circulating honing fluid provides:

Lubrication of the honing zone

Cooling during machining

Effective removal of honing debris

The coolant system includes a coolant pump, magnetic roller filter and paper-band filtration system, with a filtration accuracy of 20 μm.

The maximum coolant flow is approximately 35 L/min, with a maximum pump head of 10 m.

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CNC Control

The machine is equipped with a GSK988 CNC system and servo drives for the major machine axes.

The configuration includes:

GSK988 CNC system

8.0 kW spindle motor

6.0 kW reciprocating-axis servo motor

2.0 kW worktable servo motor

0.75 kW honing-tool feed servo motor

2.0 kW guide-frame servo motor

Precision planetary gearbox

Linear guideways

Ball screw and ball spline transmission systems

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Flexible Workpiece Clamping

The worktable is equipped with T-slots for flexible workholding and fixture installation.

A Ø500 mm three-jaw self-centering chuck is supplied as standard, while special-purpose fixtures can be customized according to the customer's workpiece requirements.

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Main Technical Specifications

Item	Specification
Machine Model	2MK2240
Machine Type	CNC Vertical Honing Machine
Honing Diameter	Ø100–400 mm
Maximum Honing Depth	400 mm
Workpiece OD	Ø120–500 mm
Workpiece Length	50–400 mm
Bore Accuracy	IT7–IT9
Surface Roughness	Ra 0.4–1.6 μm
Reciprocating Speed	1–32 m/min
Reciprocating Stroke	≥1,200 mm
Spindle Speed	5–200 rpm, stepless
Spindle Motor	8.0 kW
Machine Load Capacity	300 kg
Total Power	Approx. 21 kW
Coolant Flow	Approx. 35 L/min
Filtration Accuracy	20 μm
Machine Weight	Approx. 8,000 kg
Overall Dimensions	Approx. 3,000 × 3,200 × 3,500 mm
CNC System	GSK988

 

Contact: Lilian Lee
Whatsapp: +8619819312517
Email: drilling@dzguanlu.com

 

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