--- title: AutoMet 250 Grinder Polisher Membrane url: https://www.buehler.com/ca/products/grinding-and-polishing/grinder-polishers/automet-250-grinder-polisher-membrane/ date: 2021-10-11T16:05:36+00:00 modified: 2025-07-10T14:09:55+00:00 lang: en_CA --- # AutoMet 250 Grinder Polisher Membrane # AutoMet® 250 Grinder-Polisher [![AutoMet® 250 Pro Grinder-Polisher](https://buehler.com/ca/wp-content/uploads/sites/3/2021/10/AutoMet-250_Front_Black-600x600-1.png)AutoMet® 250 Pro Grinder-Polisher](https://buehler.com/ca/wp-content/uploads/sites/3/2021/10/AutoMet-250_Front_Black-600x600-1.png)[![AutoMet® Bowl Liner](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-Bowl-Liner_3.jpg)AutoMet® Bowl Liner](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-Bowl-Liner_3.jpg)[![AutoMet® Grinder-Polisher Series](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-Series_7.jpg)AutoMet® Grinder-Polisher Series](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-Series_7.jpg)[![AutoMet®](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-Water-Running_8.jpg)AutoMet®](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-Water-Running_8.jpg)[![AutoMet® CarbiMet](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-CarbiMet_15.jpg)AutoMet® CarbiMet](https://buehler.com/ca/wp-content/uploads/sites/3/2023/11/AutoMet-CarbiMet_15.jpg) ## AutoMet 250 ### Semi-Automatic Grinder-Polisher The AutoMet 250 semi-automatic grinder-polisher machine is compatible with a maximum 10in \[254mm\] platen and is ideal for high volume environments. This robust machine produces highly reliable results and features a simple to use membrane panel for consistent control over your surface finish. Combine with premium CarbiMet grinding paper and MetaDi diamond suspension fluid for an unparalleled surface finish. #### AutoMet 250 Benefits Simple Operation - Simple membrane control panel for ease of setting up your process - Easy to load sample holders - Utilize Apex S and Magnetic platen systems to change grinding discs and polishing cloths quickly - Rinse and Spin cleaning feature for the cloth and bowl Process Flexibility and Consistency - Power head has single force mode for faster setup and central force mode for consistent removal and polishing - Automated polishing with up to 5 Burst diamond dispensing units for increased consistency and control over how much suspension is used; flow rate controlled from the burst unit Ideal for High Volume and Large Sample size - Great for samples up to 1.5in / 40mm in diameter - Compatible with medium volume sample holders - 1hp \[0.75kW\] motor for higher volume processing Ordering | AutoMet 250 | | | | --- | --- | --- | | Part Number | Voltage | Request a Quote | | 49-7257 | 100 - 240VAC, 50-60Hz | [Request a Quote](https://buehler.com/ca/buehler-request-a-quote-canada.php?pn=49-7257) | Specifications | AutoMet 250 | | | --- | --- | | Machine Power | 100-240VAC, 50/60Hz, 1 phase | | Motor Power | 1Hp \[750W\] | | Platen Diameter | 8in \[203mm\], 10in \[254mm\] | | Platen Wheel Speed | 10-500rpm in 10rpm increments | | Wheel Direction | Clockwise or Counter-Clockwise | | Water Supply Hose | 0.25in \[6mm\] OD tube | | Water Supply Pressure | 40-100psi \[25-60bar\] | | Base Power Usage | 1.1kW, 9.6/4.8A @ 115/230VAC | | Base & Head Power Usage | 1.73kW, 15/7.5A @ 115/230VAC | | Membrane Control Panel for 250 | Three 3-digit LED displays, 14 status LED’s; Units: Metric or Imperial | | Base Sound Rating (1.5ft, 0.5m)distance no load | 59.5dB @ 100rpm | | Base & Head Sound Rating | 61.5dB @ 100/30rpm | | Weight | 170lbs \[77kg\] | | Compliance | CE; EC applicable directives | | Specifications | Power Head | | Machine Power | 0.156Hp \[116W\] | | Speed | 30-60rpm in 10rpm increments | | Central Specimen Force | 5-60 lbs \[20-260N\] | | Single Specimen Force | 1-10 lbs \[5-45N\] | | Central Force Specimen Capacity | 1in, 1.25in, 1.5in, 25mm, 30mm, 40mm and large or irregular specimens | | Single Force Specimen Capacity | 1in, 1.25in, 1.5in, 25mm, 30mm, 40mm | | Air Supply Hose | 0.25in \[6mm\] OD tube | | Air Supply Pressure | 35psi \[2.4bar\] | | Power Usage | 630W, 5.5/2.7A @ 115/230VAC | | Weight | 70 lbs \[32kg\] | | Compliance CE; | EC applicable directives | ##### Consumables and Accessories [![Burst Dispensing System](https://buehler.com/ca/wp-content/uploads/sites/3/2021/10/Burst_Stadium-150x150.png)](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/burst-dispensing-system/) [Burst Dispensing System](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/burst-dispensing-system/) Automatic Polishing Suspension Dispensing System [![CarbiMet Abrasive Discs](https://buehler.com/ca/wp-content/uploads/sites/3/2021/10/30080080_1_CarbiMet2AbrasiveDiscsPlainBacked.png)](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/silicon-carbide-grinding-papers/) [CarbiMet](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/silicon-carbide-grinding-papers/) Silicone Carbide Grinding Paper [![MetaDi Diamond Suspension](https://buehler.com/ca/wp-content/uploads/sites/3/2021/10/406530_1_MetaDiDiamondSuspension.png)](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/diamond-suspensions-and-paste/) [MetaDi](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/diamond-suspensions-and-paste/) Diamond Polishing Suspension [![Polishing Cloths](https://buehler.com/ca/wp-content/uploads/sites/3/2021/10/162002_1_PolishingCloths.png)](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/polishing-cloths/) [Polishing Cloths](https://buehler.com/ca/products/grinding-and-polishing/accessories-and-consumables/polishing-cloths/) Polishing cloths for AutoMet 250 ###### Related Products [![AutoMet® 300 Pro Grinder-Polisher](https://buehler.com/ca/wp-content/uploads/sites/3/2023/07/AutoMet-300-Pro_Front-600x600-1.png)](https://buehler.com/ca/products/grinding-and-polishing/grinder-polishers/automet-300-pro-grinder-polisher-touch-screen-programmable-pcb/) [AutoMet® Pro 300](https://buehler.com/ca/products/grinding-and-polishing/grinder-polishers/automet-300-pro-grinder-polisher-touch-screen-programmable-pcb/) 8-12in \[203-305mm\] Semi-Automatic Grinder-Polisher [![AutoMet® 250 Pro 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