MP-2M Touch Screen Metallographic Sample Grinding and Polishing Machine

The MP-2M is a double-disc metallographic sample grinding and polishing machine that can be worked by two operators at the same time. It is designed for the pre-grinding, grinding and polishing operations that prepare a mounted specimen for microscopic examination, and it is an indispensable piece of equipment for any laboratory that makes its own metallographic samples.

The speed of the machine is adjusted by a frequency converter, so any speed between 50 and 1000 r/min can be set directly rather than being limited to fixed steps. That wider speed range is what gives the MP-2M applicability across soft and hard materials, from aluminium and copper alloys through to tool steels and hard coatings.

Technical Specifications

Variable speed by frequency converter

Grinding and polishing need different speeds for different materials: a slower disc prevents smearing and edge rounding on soft metals, while a faster disc removes the deformed layer more quickly on hard materials. Because the MP-2M sets its speed with a frequency converter, any value from 50 to 1000 r/min can be dialled in directly, so the operator can match the disc speed to the specimen instead of compromising. The machine is equipped with a cooling device that cools the sample during pre-grinding, preventing the metallographic structure from being destroyed by overheating – the same principle that protects a specimen during sectioning.

Double-disc, two-operator design

Two discs and the ability to serve two operators at once double the throughput of the machine in a busy laboratory without taking up twice the floor space. A typical preparation sequence uses silicon carbide paper for grinding, then diamond suspensions from 9 um down to 0.25 um, and finishes with 0.05 um colloidal silica for a mirror surface; the MP-2M provides a stable, controllable platform for that sequence. Consumables such as paper and cloth are quick to change, so the time between samples stays short.

Applications

The MP-2M is an ideal sample-preparation machine for factories, research institutes and the laboratories of colleges and universities. Mounted samples from a press such as the XQ-2B or ZXQ-5 are ground and polished on the MP-2M and then examined on a metallographic microscope or tested on a hardness tester. Its compact footprint, low weight and simple operation make it easy to place in a shared teaching or quality-control laboratory.

Frequently Asked Questions

What is the MP-2M used for?
It is a metallographic grinding and polishing machine used for the pre-grinding, grinding and polishing of mounted specimens so that the true microstructure can be observed under a microscope.

What is the disc size and speed of the MP-2M?
The throwing plate is 200 mm in diameter and the speed is continuously adjustable from 50 to 1000 r/min by a frequency converter, so any value in that range can be set directly.

Can the MP-2M be used by two people at once?
Yes. The MP-2M is a double-disc machine designed to be operated by two people at the same time, which doubles the sample-preparation capacity in a busy laboratory.

Why does the MP-2M have a cooling device?
The cooling device cools the sample during pre-grinding so that the metallographic structure is not destroyed by overheating, which keeps the prepared surface representative of the real material.

Which machines are used around the MP-2M?
Samples are usually mounted first on a press such as the XQ-2B or ZXQ-5, ground and polished on the MP-2M, and then examined on a metallographic microscope or tested on a hardness tester.

Related Products & Pages

• Metallographic Sample Preparation
• P-2T Metallographic Grinding and Polishing Machine
• MPS-2B Metallographic Sample Grinding and Polishing Machine
• Metallographic Hardness Testing

About CHENJI & Support

CHENJI is the brand of Jinan Chenji International Trade Co., Ltd. (Shandong, China), a manufacturer and exporter of material testing machines since 2014, with in-house quality control plus third-party inspection by SGS or Bureau Veritas. The company holds ISO 9001 certification (626024QH073R1) and is a Bureau Veritas audited supplier (MIC-ASR2451820). Testing machines are normally supplied with a calibration certificate valid for 12 months and traceable to national force standards, and our engineers help you select the machine, fixtures and accessories for your specimen and method.

Every quotation is prepared against the standard you test to, so the delivered machine matches the test method rather than only the headline capacity. Spare parts, consumables and calibration support are available after delivery, and machines can be produced to OEM or ODM requirements when a customer drawing or specification is provided.

Selecting and Verifying a Testing Machine

Choosing a machine is a matter of matching capacity to the specimen and the method, not of buying the largest frame. A 1000 kN machine is not suitable for a sample that needs 1 N of force; capacity selection follows the specimen and the standard, and the force measuring system should be verified per ISO 7500-1 or ASTM E4 on a regular schedule. Load cells are commonly supplied as class 0.5 or class 1, which means the indicated force stays within ±0.5% or ±1% of the true force.

Test results are only comparable when they are quoted together with the standard, the specimen geometry, the test speed and the force measurement class. We are glad to review your test method and specimen so that the machine, fixtures and accessories are correctly specified before you order.

Request a Quotation

Tell CHENJI the materials and throughput you need, and we will confirm the MP-2M configuration, discs and consumables for a quotation.

Email annie@chenjitester.com or call / WhatsApp +86 158 5311 1612.