AutoMet® 250 Grinder-Polisher

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


AutoMet 250
Part Number Voltage Request a Quote
49-7257 100 - 240VAC, 50-60Hz Request a Quote


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

Automatic Polishing Suspension Dispensing System

Silicone Carbide Grinding Paper

Diamond Polishing Suspension
Polishing cloths for AutoMet 250
Related Products

8-12in [203-305mm]
Semi-Automatic Grinder-Polisher

8-10in [203-254mm]
Semi-Automatic Grinder-Polisher

8-12in [203-305mm]
Semi-Automatic Grinder-Polisher

8-12in [203-305mm]
Manual Grinder-Polisher
Product Literature
AutoMet Sell Sheet English
AutoMet Sell Sheet
AutoMet Brochure English
AutoMet Brochure
Buehler Product Catalog
Buehler Product Catalog
Buehler Latest
Buehler Product Catalog
Buehler Product Catalog

Buehler is a division of Illinois Tool Works (ITW) and is based in Lake Bluff, Illinois. Our company’s legacy comprises groundbreaking designs including the first commercially available mounting press, the first Rockwell hardness tester and we were the first to automate polishing. This same forward-looking spirit, combined with a strong understanding of lab priorities, continues to inform how we serve our customers world-wide.

Green Practices in Metallography
Green Practices in Metallography Webinar

Sustainability is important to Buehler and its employees. We continue to challenge ourselves to reduce our environmental impact adding new programs each year and planning for continuous improvement. Our comprehensive recycling program prevents 70,000 lbs. of carboard, plastic, paper, and metals from going to our landfills. Our electricity is 100% zero emission powered by solar (33%), hydroelectric (33%), and wind (34%).

Protect your Investment
Protect your Investment

Protect your investment with Buehler’s Service Plans. Keep your lab up and running with access to wear part kits and your machine being services by one of our highly trained Service Technicians.

Properly maintaining your equipment will ensure consistent performance , minimize downtime and reduce the likelihood of costly repairs.

Optimize Your Sectioning Webinar

This webinar will focus on the Sectioning/Cutting step of material preparation for analysis: the goals of this step, our recommendations for how to avoid the potential pitfalls, and some of the solutions that Buehler offers to ensure good results and improve your process.

Quick Links
Quickly access important info or visit our E-Shop. Buehler is represented in Canada by Opti-Tech Scientific.
Buehler Literature

Visit our literature section

Buehler Tools

View our tools and training

Buehler Service

Contact Buehler Service

Buehler eShop

Visit Opti-Tech's E-Shop

Buehler an ITW Company
Buehler Products