Double Disc Metallographic Grinding and Polishing Machine

For laboratories that face heavy daily metallurgical testing workloads, traditional single-wheel polishing equipment often becomes a bottleneck for sample delivery. A double disc metallographic grinding and polishing machine solves this pain point perfectly by equipping two independent working platens. Field technicians can complete coarse abrasive grinding on one plate while conducting mirror polishing on the second plate in parallel, which greatly shortens the total pretreatment cycle for batches of metal samples.

Our MP series dual-wheel polishing units integrate all standard pretreatment steps: pre-grinding, rough grinding, fine grinding, coarse polishing and high-gloss finishing. Most conventional configurations adopt one-piece high-strength ABS casing, which resists water splash, abrasive corrosion and frequent physical collision in busy lab environments. High-end upgraded versions are fitted with fiberglass housings for round-the-clock continuous operation without performance degradation. Every device is equipped with a closed water circulation pipeline, which continuously cools high-friction sample surfaces and washes away tiny abrasive residues, effectively preventing thermal deformation, edge chipping and unilateral wear on soft alloys, composite materials and precision machined components.

We have designed diversified speed and control configurations to match varied industrial standards and operating habits. Users can select fixed two-speed, stepless adjustable speed, bidirectional plate rotation, four preset constant speeds and independent dual-plate speed control. The standard working plate diameter is 203mm, with optional custom sizes of 230mm and 250mm, compatible with globally mainstream metallographic abrasive papers and polishing cloths. Each machine is delivered with a full set of standard spare parts, allowing your testing team to start specimen preparation right after equipment installation and simple commissioning.

We provide 8 mature MP series dual-disc models to match different budget ranges, daily processing volumes and standardized testing protocols:

1. MP-2 (Entry Fixed-Speed Basic Dual-Plate Model)

Cost-effective entry-level double disc metallographic grinding and polishing machine designed with differentiated fixed rotational speeds for the grinding plate and polishing plate separately. Featuring robust ABS integrated shell and intuitive knob operation, this model is widely chosen by small and medium-sized manufacturing enterprises with stable, conventional metallurgical inspection workflows and moderate daily sample quantities.

2. MP-2B (Single-Control Variable-Speed Universal Model)

As our most versatile mainstream dual-wheel polishing device, this unit supports 50–1000rpm full-range stepless speed adjustment under centralized single control. Operators can flexibly tweak rotational velocity according to the hardness of ferrous metals, non-ferrous alloys and polymer composite materials, making it a universal choice for most conventional industrial quality control laboratories.

3. MP-2CE (Dual-Plate Independent Variable Speed Control Model)

Equipped with two separate 550W drive motors, each working plate can be adjusted to an independent rotational speed without mutual interference. You can set dedicated speed parameters for rough grinding and fine polishing respectively, and even allow two operators to process different specimens on the two platens simultaneously, maximizing daily lab testing output.

4. MP-260 (Stable Fixed-Speed Dual-Wheel Bench Polisher)

Adopting dual 550W drive motors paired with fixed 300/600rpm rotational speeds, this model runs with low vibration and stable performance under long-duration continuous working conditions. Its simple mechanical structure lowers routine maintenance frequency and spare part replacement costs, ideal for regular metallurgical inspection on production lines.

5. MP-260E (Variable-Speed Bidirectional Rotation Dual-Disc Model)

The adjustable speed range covers 50rpm to 600rpm, with an optional upgrade to 1000rpm maximum speed. The forward and reverse rotating function effectively avoids unilateral abrasion and edge deformation of thin or soft specimens, delivering ultra-flat sample surfaces for failure analysis of new energy parts, electronic components and precision alloy materials.

6. MP-2D (Industrial Heavy-Duty Dual-Control Fixed-Speed Model)

Configured with two fixed rotational speeds and independent dual-plate control, this machine supports both 220V single-phase and 380V industrial voltage inputs. Developed for large-scale production workshops with heavy-load continuous operation demands, it can steadily handle high-volume batch metallurgical specimen pretreatment tasks for automotive, machinery and metallurgy industries.

7. MP-2DE (Multi-Speed Bidirectional Rotation Advanced Dual-Plate Model)

This upgraded unit integrates three core functional designs: stepless speed regulation, two fixed preset speeds and bidirectional disc rotation. Rich parameter adjustment options adapt to nearly all types of metals, alloys, ceramics and high-molecular composite materials, which is favored by material R&D laboratories with diverse sample types and strict surface processing standards.

8. MP-2S (Touchscreen Premium Four-Speed Dual-Disc Polisher)

Our top-tier dual-wheel polishing unit adopts LCD touch interactive control, with four built-in memory constant speeds plus a 50–1000rpm stepless adjustment range. The high-strength fiberglass housing ensures stable long-term operation, and the speed memory function guarantees consistent specimen surface quality for standardized lab testing procedures, widely deployed in university metallurgy labs and authoritative third-party testing institutions.

• Parallel processing on two separate working platens greatly boosts laboratory sample processing efficiency, cutting down the time spent on metallographic specimen pretreatment for batch testing tasks.
• Abundant control configurations are available, including single centralized control, dual independent drive, fixed-speed, variable-speed, bidirectional rotation and touchscreen programmable speed preset, meeting customized process requirements from multiple industries.
• Precision surface finishing treatment on each working plate thoroughly removes cutting-induced damage layers and surface burrs, ensuring scratch-free flat specimens to guarantee accurate observation of internal metallographic microstructures.
• Two housing material options are provided: corrosion-resistant ABS and wear-resistant fiberglass, with integrated molding technology to extend service life under high-frequency daily laboratory use.
• A built-in circulating water cooling and flushing system timely discharges abrasive debris and reduces frictional temperature, effectively preventing thermal deformation caused by high-speed long-time polishing.
• Complete standard accessory packages are equipped for all models, and customized working plate sizes are supported to match various specifications of mainstream global metallographic consumables.

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