Precision lapping machine BM4 series

stationaryfor hard materials

Product overview
The BM400 / BM400-R is a professional lapping machine designed for finishing profiled hard-metal inserts. The machine combines a fixed mechanical aluminium table (400×70 mm) for secure mechanical clamping with a high-power open-field magnetic chuck to provide strong holding force during lapping operations. The BM400-R variant adds a carriage-run shortening switch and an external tank with pump as standard for improved process control.

Key technical features

• Automatic grinding-wheel down-feed unit with automatic stop at preset level
• Tilting head for grinding hollow/concave surfaces
• Carriage driven by chain for robust translational movement
• Guides protected by replaceable hardened and ground steel strips
• Fixed aluminium mechanical table (400×70 mm) for mechanical fixing and mounting of magnetic plates
• BM400-R specific: switch for shortening carriage run; external tank with pump supplied as standard
• Coolant system supplied (external tank on BM400-R)

Application and advantages
The BM400 / BM400-R is intended for manufacturers requiring repeatable, accurate finishing of profiled hard-metal inserts. The combined mechanical table and open-field magnetic chuck ensure secure clamping and stable processing, supporting consistent surface quality and dimensional repeatability. The BM400-R option enhances flexibility for short-stroke operations and external coolant management.

Options and accessories

• Base/stand
• Diamond grinding wheels (D46, D15)
• Magnetic plates for hard-metal tools (400×70×20 mm or 200×70×20 mm)
• Protective bellows for guides
• Full range of accessories available to expand functionality and process control

Technical specifications

• Models: BM400 and BM400-R (short-stroke variant)
• Machine type: professional lapping/finishing machine for profiled hard-metal inserts
• Chuck/table: fixed mechanical aluminium table (400×70 mm) combined with high-power open-field magnetic chuck
• Feed: automatic grinding-wheel down-feed with automatic stop at preset level
• Head: tilting head for hollow/concave grinding
• Carriage: chain-driven carriage; guides with replaceable hardened steel strips
• BM400-R: switch for shortening carriage run; external coolant tank with pump included
• Options: base, diamond wheels, magnetic plates 400×70×20 or 200×70×20 mm, protective bellows, other accessories on request