Technical Data Sheet of the Grinder Used: Brown & Sharpe 618 Micromaster

Brand: Brown & Sharpe
Model: 618 Micromaster
Type: Grinding
Condition: Used
Price: On request

1. General Description

The Brown & Sharpe 618 Micromaster grinding machine is a precision machine designed for flat surface grinding operations. This model is known for its accuracy and reliability. It is equipped with a magnetic chuck and automatic hydraulic feed on two axes, allowing efficient and accurate grinding operations. The machine is ideal for industrial applications requiring high-quality surfaces and tight tolerances.

2. Main Components

• Structure and Base: Built with a sturdy cast iron base to ensure stability and reduce vibrations. The base is designed to maintain accuracy even under heavy loads.
• Magnetic Table: Grinding table with magnetic clamping system to fix the work pieces. The surface of the magnetic chuck is designed to ensure a secure grip and a stable work surface.
• Advancement System: Automatic hydraulic advancement on two axes:
  • Longitudinal Axis (X): Movement along the length of the grinding plane.
  • Transverse (Y) Axis: Lateral movement for precise positioning of the work piece.
• Grinding Wheel: Equipped with an abrasive wheel mounted on a spindle that rotates at high speed to perform grinding.
• Motor and Transmission: Electric motor that powers the grinding wheel and feed mechanisms.

3. Technical Characteristics

• Magnetic Platen Dimensions: Specific platen dimensions should be verified with the manufacturer or in the manual. Typically, the 618 model has a bed size consistent with its name (618 indicates a bed size of 6 x 18 inches, or approximately 150 x 460 mm).
• Hydraulic advancement: Automatic on longitudinal (X) and transversal (Y) axes. It allows precise and constant adjustments during the grinding process.
• Wheel Speed: Variable wheel speed to adapt to different materials and types of grinding.
• Accuracy: High precision with very tight tolerances, ideal for applications requiring perfectly ground surfaces.

4. Formulas and Parameters of Optimal Use

• Grinding Speed ​​(v): Determined by the speed of the grinding wheel and the characteristics of the material. Formula for the peripheral speed of the grinding wheel:
  v=π×D×N1000v = \frac{\pi \times D \times N}{1000}
  $v$ $=$ 1000 π × D × N ​Where

  • DD $D$ = Diameter of the grinding wheel in mm
  • NN $N$ = Wheel rotation speed in rpm

• Feed (F): The optimal feed must be adjusted according to the material and the required tolerance.
  F=LTF = \frac{L}{T}
  $F$ $=$ T L ​Where

  • LL $L$ = Feed length in mm
  • TT $T$ = Time in seconds

• Grinding Depth (P): Determined by machine capacity and tolerances. The grinding depth must be controlled to avoid excessive wear of the grinding wheel.

5. Workable Materials

The Brown & Sharpe 618 Micromaster grinding is suitable for processing a variety of materials, including:

• Metals: Steel, aluminium, copper, brass.
• Alloys: Various metal alloys that require high precision surfaces.
• Hard Materials: Composites, ceramics, reinforced materials.

6. Maintenance

• Lubrication: Check and maintain lubricant levels for feed mechanisms and grinding wheel. Apply lubricant regularly according to manufacturer's specifications.
• Cleaning: Clean the magnetic chuck and machine regularly to remove chips and dust that could affect accuracy and efficiency.
• Inspection of the Wheel: Inspect the wheel for signs of wear and replace if necessary. Make sure it is well balanced to avoid vibrations.
• Adjustment and Calibration: Periodically check and adjust the axles and hydraulic system to maintain machine accuracy.

7. Verification of used cars

• Functionality: Test the grinding to ensure that all systems (hydraulic feed, magnetic chuck, grinding wheel) are working correctly and without problems.
• Condition of Components: Inspect the machine for any signs of wear or damage on major components, such as the grinding wheel, feed mechanisms, and magnetic chuck.
• Accuracy: Verify the accuracy of the grinding with measurements and tests on test pieces to ensure that it meets the required tolerances.
• Documentation: Check the presence and completeness of the use and maintenance manual. This document is essential for the operation and maintenance of the machine.

8. Sectors of Use

• Manufacturing Industry: For grinding flat surfaces of mechanical components and precision parts.
• Aerospace Sector: For the machining of aeronautical components that require high precision surfaces.
• Automotive Sector: For the production of automotive parts that require precise finishes and tight tolerances.

9. Why Buy Used

• Lower Cost: Purchasing a used grinder like the Brown & Sharpe 618 Micromaster can offer significant savings over a new machine while still maintaining high performance.
• Reliability: Well-maintained grindings continue to provide high-precision results even after years of use.
• Immediate Availability: Buying used reduces waiting times and guarantees immediate availability of the machine.

Note: For further details and to arrange a viewing or test drive of the machine, please contact the seller.

USED ​​GRINDING. USED ​​BROWN & SHARPE 618 MICROMASTER GRINDING MACHINE. 2-AXIS MAGNETIC TABLE, automatic hydraulic advancement on both long and transversal strokes. PRICE ON REQUEST.