ZPG-300 Automatic Polishing Machine for Metallography | Horizontal Vibration, 99H Timer, 300mm Disc

‌ZPG-300: The “Set-and-Forget” Polisher Metallographers Swear By‌

Manual polishing ruining your SEM prep? The ‌ZPG-300 Automatic Polishing Machine‌ is a metallographer’s dream: it handles ‌batch polishing‌ of 22-45mm samples with ‌zero embedded abrasives‌ or deformation layers. Designed for labs that need ASTM/E3-compliant finishes, this machine uses ‌horizontal vibration‌ and ‌smart frequency adjustment (25-400Hz)‌ to polish alloys, ceramics, or composites flawlessly – no PhD required. Load your mounted specimens, set the timer (up to 99 hours), and let the ZPG-300’s ABS-enclosed system do the rest. Walk away. Come back to lab-ready samples.

‌Key Benefits :‌

• ‌Horizontal Vibration‌: Maximizes cloth contact for ‌damage-free polishing‌ (no rips, tears, or "orange peel" surfaces).
• ‌Auto Frequency Adjustment‌: Smartly adapts to materials – soft aluminum or hardened steel.
• ‌Batch Processing‌: Polish 20+ Φ22mm microsamples or 6-8 Φ45mm cores in one load.
• ‌ABS Dust Cover‌: Monitor progress through the transparent lid; keeps labs clean.
• ‌Plug-and-Play Setup‌: Pre-calibrated – start polishing in 5 minutes.

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‌Technical Specs Table ‌

‌Parameter‌	‌ZPG-300 Specifications‌
‌Polishing Disc‌	300mm diameter (fits standard cloths)
‌Sample Capacity‌	Φ22mm, Φ30mm, Φ45mm
‌Frequency Range‌	25-400Hz (auto-adjusted per material)
‌Voltage Range‌	50-90V (precise intensity control)
‌Max. Timer‌	99 hours 99 minutes (unattended runs)
‌Power‌	220V, 1.5kW (energy-efficient)
‌Dimensions‌	450×565×400mm (compact bench fit)
‌Weight‌	90kg (vibration-dampened stability)
‌Certifications‌	CE, ISO9001
‌Shipping‌	‌5-8 days worldwide‌, 1 MOQ

ZPG-300 Vibratory Polishing Machine is designed for reaching the high quality polishing and reducing the equipment dependence on staff skills. It uses a spring plate and a magnetic motor to produce vibration in the upper and lower directions. The spring plate between the polishing disc and the vibrating body is angled so that the sample can move circularly in the disc. The operation is simple and the applicability is wide. It can be applied to almost all kinds of materials. The polishing time can be arbitrarily set up according to the sample state, and the polishing area is wide which would not generate damage layer and deformation layer. It can effectively remove and avoid the characteristics of floating, embedded and plastic rheological defects. Unlike traditional vibratory polishing machines, ZPG-300 can make horizontal vibration and maximum increase the contact time with the polishing cloth. Once the user has set the program, the sample will automatically start vibratory polishing in the disc. Besides, many pieces of samples can be placed at one time, which greatly improves the work efficiency, and the external transparent dust cover can ensure the cleanness of the polishing disc. The whole machine is made of ABS material. The appearance is novel and beautiful, and the vibration frequency can be adjusted automatically with the working voltage. This machine is not suitable for the polishing of the workpiece with special rough surface, it takes too long time, but it is still the best choice of fine polishing machine.

Main Parameters:

Polishing Disc Diameter	300mm
Polishing Cloth Diameter	300mm
Power	220V, 1.5kw
Voltage Range	50-90V
Frequency Range	25-400Hz, automatic adjusted
Max. Setup Time	99 Hours 99 Minutes
Sample Holding Diameter	Φ22mm, Φ30mm, Φ45mm
Dimension	450×565×400mm
Net Weight	90kg