Grinding Hole Diameter: φ40–φ100mm · Effective Grinding Depth: 900mm · Max. Workpiece Swing: φ400mm

The MX-2018 is a high-end internal grinding machine with a marble–steel bed and triple-head system for precise internal, center bore, and end-face grinding in one setup. Featuring Siemens CNC, linear motors, and automation, it delivers micrometer-level accuracy and efficient production for both small batches and high volumes.

MX-2018 Series

Regular maintenance

Spare parts supply

On-site installation service

Customized design

Key Features

● Stable & Rigid Machine Structure: Constructed with a cast steel frame and marble base, the machine offers superior damping and thermal stability, ensuring consistent machining accuracy even during extended or high-speed operations.

● 3-in-1 Compound Grinding System: Integrates three grinding heads—internal, center hole, and end-face—into a single setup. Equipped with German GMN bearings, the system enables high-speed internal grinding alongside precise OD and face finishing.

● High-Precision Linear Motion: Utilizes direct-drive linear motors and high-resolution encoders for backlash-free movement, delivering ±0.001 mm positioning accuracy for ultra-precise operations.

● Fully Automated Workflow: Robotic loading and unloading, combined with Siemens CNC control, supports 24/7 production with minimal manual input and ensures consistent quality across high-volume manufacturing runs.

● Advanced Grinding Wheels & Dressing: Employs CBN wheels for small bore applications and ceramic wheels for OD and face grinding, while a diamond dressing disc maintains sharp and accurate wheel profiles throughout production.

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Recommended Configurations

● Workpiece Spindle & Clamping: Servo/variable frequency motor, pneumatic/hydraulic fixtures, centers or centerless support, optional cooling

● Feeding & Motion System: Servo motor, ball screw, precision rails, gap compensation

● Wheel Dressing System: Internal wheel dresser (single-point/roller/diamond), automatic cycle setting

● Cooling & Chip Removal: Cooling circulation, adjustable nozzles, filtration (magnetic separator + paper filter), chip conveyor

● Control & Automation: HMI touch screen, automatic loading/unloading

● Measurement & Compensation: Contact/laser probe, rotary encoder/displacement sensor

● Safety & Protection: Enclosed cover, interlock system, emergency stop, wheel protection, spark/dust protection

● Accessories & Options: Workpiece positioning stand, internal fixture, lighting, non-standard fixtures

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Application Case

● Client: Hydraulic Valve Manufacturer – Japan

● Component: Internal face and center bore of hydraulic sleeves (Ø8 mm × 28 mm)

● Setup: MX-2018 with robotic loader, CBN grinding head, GMN internal spindle

● Results: • Tolerance Held: ≤ ±1.5 μm roundness, ≤ 0.003 mm coaxiality • Cycle Time: 38 seconds per part (including full 3-surface grinding)

● Operator Feedback: “This machine completely eliminated our need for post-process correction. With one clamp and three surfaces done, we’ve halved our grinding floor space and doubled part consistency.”

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Specifications	Unit	MX-2018
Grinding diameter	mm	3-20
Max.grinding depth	mm	20
Max.clamping diameter of workpiece	mm	30
Max.movement of worktable(axis Z)	mm	250
Max.movement of wheelhead(axis X)	mm	680
Moving speed of worktable(axis Z)	m/min	0-20
Moving speed of worktable(axis Y)	m/min	0-20
Resolution of axis Z	mm	0.0001
Resolution of axis X	mm	0.0001
Rotating speed of work spindle	r/min	0-4000
Swivel angle of the workhead	°	±1
Positional accuracy	mm	±0.0025
Relocation accuracy	mm	±0.0015
Max.speed of bore spindle	r/min	105000
Max.power of bore spindle	KW	2
Max.speed of OD spindle	r/min	3000
Max.power of OD spindle	KW	10
Roundness of bore	mm	0.0005
Cylindricity of bore	mm	0.001
Size deviation of bore	mm	±0.002
Roundness of OD	mm	0.001
Vertical deviation between OD and end face	mm	0.0015
Size deviation of OD	mm	0.008
Coaxiality of ID and OD	mm	0.0015
Parallel deviation between internal end face and datum end face	mm	0.01
Thickness deviation of internal end face	mm	±0.01
Roughness	μm	Ra0.1
Machine size	mm	2250×1700×2000
Total weight of machine	Kg	5500

MN CATALOG.pdf

Frequently Asked Questions

1、I only have part drawings. Can you recommend a suitable internal cylindrical grinding machine?

Absolutely! Minnuo has an experienced pre-sales technical team. As long as you provide the part drawings, whether it's for internal hole machining with an internal cylindrical grinding machine or a customized model with combined functions, we can recommend a single machine within 10 minutes. For solutions involving multiple machines, a complete proposal will be provided within 5 working days.

2、Can I customize a CNC internal cylindrical grinding machine to match my process requirements?

Yes. I can customize a CNC internal cylindrical grinding machine based on workpiece size, accuracy requirements, automation level, and more—including spindle type, grinding wheel configuration, automatic loading/unloading system, and cooling system—so it fully matches my on-site production needs.

3、3.How is the quality of your internal cylindrical grinding machines guaranteed?

We are equipped with multiple high-end international machining centers, ensuring that all key components of the internal cylindrical grinding machine have high precision and consistency. Each machine is fully tested before delivery and comes with a detailed quality inspection report.

4、What is the typical delivery time?

For standard models, we have inventory available for fast delivery. For customized internal cylindrical grinding machines, the delivery time is generally 30–45 working days. We will confirm the exact timeline based on the complexity of the order.

5、Do you support full machine customization?

Yes. Whether it’s the control system, machine bed design, grinding range, or sheet metal guarding, I can fully customize the internal cylindrical grinding machine based on my specific needs. You also offer combined solutions like internal and external cylindrical grinding machines in a single setup.

6、What types of workpieces are suitable for an internal bore grinding machine?

An internal bore grinding machine is mainly used for machining internal holes of parts such as sleeves, gear bores, bearing inner rings, and hydraulic components. You can use it to achieve high-precision grinding of inner bores, stepped holes, tapered holes, and more. It is widely applied in industries like automotive, hydraulics, and mold manufacturing.

7、What level of accuracy can a high precision internal grinding machine achieve?

Our high precision internal grinding machine can consistently achieve machining accuracy within 2μm, and some high-end models can reach below 1μm in a temperature-controlled workshop. If I have high requirements for roundness or coaxiality, I can also choose optional in-process measuring systems and active dressing units.

8、Is it complicated to maintain an internal cylindrical grinding machine during use?

Not at all. You only need to regularly check the lubrication oil, grinding wheel wear, spindle operation status, and whether the cooling system is functioning properly. Our internal cylindrical grinding machine is designed with a compact structure and easy maintenance in mind. We also provide maintenance manuals and training services to help you complete daily upkeep with ease.