Edm Bearings

About Edm Bearings

EDM 624 and 625 Bearings refer to specific types of miniature bearings used in Electrical Discharge Machining (EDM) or in EDM-related equipment. These bearings are designed to handle the high-precision requirements of EDM processes and are commonly found in EDM machines where precise motion control is needed.

Key Features and Specifications of EDM 624 and 625 Bearings:

1. Bearing Types:

   • 624 Bearing and 625 Bearing refer to specific sizes in the miniature ball bearing category. These bearings are commonly used in machines like EDM wire machines, sinker EDMs, and other precision tools where low friction and accurate rotational motion are required.

2. Size:

   • 624 Bearing typically has an inner diameter of 4mm, an outer diameter of 13mm, and a width of 5mm.
   • 625 Bearing is slightly larger with an inner diameter of 5mm, an outer diameter of 16mm, and a width of 5mm.
   • These sizes make them well-suited for applications where compact dimensions are necessary, such as in spindles or rotating parts of EDM machines.

3. Material:

   • EDM 624 and 625 bearings are usually made from high-quality steel for durability and precision. Some bearings may feature stainless steel or ceramic materials depending on the applications requirements, particularly in environments with high levels of heat or corrosion.

4. Ball Bearing Construction:

   • Both 624 and 625 bearings are typically ball bearings, meaning they use balls as the rolling elements between the inner and outer rings. This construction minimizes friction and wear, providing smooth rotational movement for the machine components they are installed in.
   • The design also allows for the reduction of radial and axial loads, helping maintain the precision of the machine components.

5. Precision and Tolerances:

   • EDM applications require high-precision bearings to ensure that small movements and delicate machining processes are carried out without any vibrations or irregularities.
   • These bearings typically come with ABEC 1, ABEC 3, or ABEC 5 tolerances, with ABEC 5 offering the highest precision. The tighter the tolerance, the better the bearing's ability to maintain accuracy at high rotational speeds.

6. Lubrication:

   • Bearings used in EDM machines, including 624 and 625 bearings, may come pre-lubricated or require grease or oil lubrication to reduce friction. In some EDM systems, dry lubrication or sealed bearings may be used to maintain cleanliness in the machining area and avoid contamination from dielectric fluids or debris.

Engineered for Precision and Durability

EDM Bearings are meticulously designed to meet the exacting standards of wire cut machines. Their high precision (P5/P6) and robust stainless-steel construction ensure reliability during long-term, high-speed operations. The bearings offer a very low vibration level, reducing maintenance needs and extending equipment lifespan in rigorous machining environments.


Versatile Sizing and Superior Protection

Available in a range of outer diameters (10-50mm) and inner diameters (3-20mm), these bearings accommodate both standard and custom requirements. Each unit is pre-lubricated with premium grease and packaged securely in box or pouch packing, providing immediate protection against corrosion and ensuring lasting smoothness and performance.