{"id":5726,"date":"2026-08-26T03:16:00","date_gmt":"2026-08-26T07:16:00","guid":{"rendered":"https:\/\/www.semiconductorcutting.com\/?p=5726"},"modified":"2026-08-26T03:16:03","modified_gmt":"2026-08-26T07:16:03","slug":"magnet-slicing-machine","status":"publish","type":"post","link":"https:\/\/www.semiconductorcutting.com\/ko\/magnet-slicing-machine\/","title":{"rendered":"\uc790\uc11d \uc808\ub2e8\uae30 \uc120\ud0dd \uac00\uc774\ub4dc \u2014 \ub2e4\uc774\uc544\ubaac\ub4dc \uc640\uc774\uc5b4 \ud1b1\uc744 \uc774\uc6a9\ud55c NdFeB, SmCo \ubc0f \ud398\ub77c\uc774\ud2b8 \uc808\ub2e8"},"content":{"rendered":"

If you are still slicing NdFeB blocks with an ID saw, you are losing 0.6\u20131.0 mm of magnet per cut and eating a chipping rate above 3% on thin slices. A properly sized \uc790\uc11d \uc2ac\ub77c\uc774\uc2f1 \uae30\uacc4<\/strong> using diamond wire drops kerf to 0.25\u20130.40 mm and pulls chipping under 1% \u2014 that alone recovers 20\u201330% more slices per boule on a typical 200\u2013600 mm block.<\/p>\n\n\n\n

This page is the equipment hub for magnet slicing. It walks through how diamond wire saws work on sintered magnets, how to pick a machine by workpiece size and slice thickness, and where the machine choice changes for SmCo, ferrite, and motor-grade production lines.<\/p>\n\n\n\n

What Is a Magnet Slicing Machine?<\/h2>\n\n\n\n

A magnet slicing machine is a diamond wire saw configured to cut sintered permanent magnets \u2014 NdFeB, SmCo, and hard ferrite \u2014 into finished slices, blocks, or arc segments. The core cutting element is an electroplated or brazed diamond wire (typical diameter 0.18\u20130.35 mm) that runs continuously over a wire spool at 1500\u20132400 m\/min while the workpiece feeds down at 0.3\u20131.2 mm\/min.<\/p>\n\n\n\n

The reason wire saws replaced ID saws for magnet cutting is simple: sintered NdFeB is hard (Hv 550\u2013650) and brittle. ID saws concentrate cutting force on a single blade edge, so edge chipping and subsurface cracks are frequent. Wire distributes the load across dozens or hundreds of abrasive grains at the same time.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

How Diamond Wire Saw for Magnets Actually Works<\/h2>\n\n\n\n

Two wire types show up on magnet lines:<\/p>\n\n\n\n

\uc640\uc774\uc5b4 \uc720\ud615<\/th>Diameter<\/th>Life on NdFeB<\/th>\uc5d0 \uc801\ud569<\/th><\/tr><\/thead>
\uc804\uae30 \ub3c4\uae08 \ub2e4\uc774\uc544\ubaac\ub4dc<\/td>0.20\u20130.30 mm<\/td>15\u201330 km<\/td>High-volume thin slicing<\/td><\/tr>
Brazed diamond<\/td>0.30\u20130.45 mm<\/td>40\u201380 km<\/td>Thick blocks, arc segments<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Electroplated wire has finer grit and cuts faster, but wears out sooner. Brazed wire lasts longer but leaves a slightly rougher cut. On a 500 mm NdFeB block, we usually run electroplated for slices under 2 mm and brazed for blocks that will be re-machined afterward.<\/p>\n\n\n\n

One gotcha: diamond wire on magnets requires a water-based coolant with corrosion inhibitor<\/strong>. Straight water rusts the freshly cut NdFeB surface within hours, and standard oil coolants leave residue that interferes with downstream grinding. Most production lines use a 3\u20135% synthetic coolant concentration.<\/p>\n\n\n\n

If you’re weighing wire saw vs. ID saw at the process level, see our multi-wire saw vs. inner-diameter saw comparison<\/a> for the head-to-head kerf and yield numbers.<\/p>\n\n\n\n

NdFeB Wire Saw Machine Selection by Block Size<\/h2>\n\n\n\n

The single most important selection variable is block size. An oversized machine burns capital; an undersized machine chokes on throughput. Below is how we size NdFeB magnet wire saw cutting equipment by the largest block you plan to run.<\/p>\n\n\n\n

Small Blocks Under 200 mm \u2014 SOMS3-430S<\/h3>\n\n\n\n

For R&D, prototyping, or sensor-magnet production where blocks are 50\u2013180 mm, a compact oscillating wire saw is the right call. The SOMS3-430S is a single-wire oscillating machine \u2014 the wire moves back and forth in a short stroke rather than running as a continuous loop. Oscillation is slower per cut but produces very low subsurface damage, which matters when you are cutting neodymium magnet slicing wire saw workpieces that will go straight to coating without a lapping step.<\/p>\n\n\n\n

Standard Blocks 200\u2013600 mm \u2014 SOM4-630D (NdFeB Block Multi-Wire Saw)<\/h3>\n\n\n\n

This is where most production sits. A multi-wire saw slices a whole block into 50\u2013200 parallel slices in one cut cycle, driven by a single wire that wraps repeatedly around two guide rollers. The SOM4-630D handles blocks up to 630 mm long and gives you the option of 0.25\u20131.0 mm pitch depending on slice thickness. For any NdFeB block multi-wire saw application in the 200\u2013600 mm range, this is the workhorse.<\/p>\n\n\n\n

Real-world number: on a 400\u00d7100\u00d780 mm block, a SOM4-630D running at 1800 m\/min wire speed and 0.6 mm\/min feed produces roughly 65 slices in 130 minutes with 0.30 mm kerf.<\/p>\n\n\n\n

Large Blocks 600\u20131000 mm \u2014 SOM4-750D and SOM4-1000D<\/h3>\n\n\n\n

For wind turbine magnet segments and large industrial motor cores, block length runs up to 1 m. The SOM4-750D and SOM4-1000D use reinforced wire tension systems (35\u201350 N) to keep wire bow under control on long cuts. Bow control is the difference between \u00b110 \u03bcm thickness variation and \u00b140 \u03bcm \u2014 the latter fails most motor-magnet specs.<\/p>\n\n\n\n

For a broader intro to NdFeB cutting configurations across all block sizes, see our NdFeB cutting machine overview<\/a>.<\/p>\n\n\n\n

Thin Magnet Slice Cutting Machine (0.3\u20133 mm)<\/h2>\n\n\n\n

Thin slices are their own problem. Below 1 mm, the slice itself becomes flexible enough that cutting forces cause it to deflect, which shows up as tapered edges and warp. A dedicated thin magnet slice cutting machine solves this in two ways:<\/p>\n\n\n\n

    \n
  1. Higher wire speed<\/strong> \u2014 2000\u20132400 m\/min instead of the standard 1500\u20131800 m\/min, so each abrasive grain removes less material per pass<\/li>\n\n\n\n
  2. Reduced feed rate<\/strong> \u2014 0.2\u20130.4 mm\/min instead of 0.5\u20130.8 mm\/min<\/li>\n\n\n\n
  3. Rigid workpiece bonding<\/strong> \u2014 the block is bonded to a graphite or ceramic support plate before cutting, and the cut goes 0.3\u20130.5 mm into the support<\/li>\n<\/ol>\n\n\n\n

    The SOM2-600S is set up for this: high-speed spindle, precision feed axis, and a workpiece holder designed for support-plate bonding. Typical output is 0.3\u20132.0 mm NdFeB slices with \u00b15 \u03bcm thickness variation.<\/p>\n\n\n\n

    Fair warning: thin slice yield on Grade N52+ NdFeB is meaningfully lower than N42 \u2014 the higher grades are more brittle. If you’re spec’ing a line for N52 or N54 thin slices, budget for 8\u201312% scrap rate even on a well-set-up machine.<\/p>\n\n\n\n

    SmCo and Ferrite Magnet Cutting<\/h2>\n\n\n\n

    SmCo (Hv 500\u2013600) cuts similarly to NdFeB but is more thermally sensitive. Wire speeds usually drop 10\u201315% and coolant flow needs to be higher. Ferrite is much softer (Hv 480\u2013550) but very abrasive on wire \u2014 expect 40\u201350% shorter wire life than NdFeB.<\/p>\n\n\n\n

    For SmCo-specific tooling and cut parameters, see the SmCo magnet cutting machine page<\/a>.<\/p>\n\n\n\n

    Motor Magnet Slicing Equipment by Application<\/h2>\n\n\n\n

    The end application drives the machine choice more than the material grade does. Below is how motor magnet slicing equipment breaks down by end use.<\/p>\n\n\n\n

    \uc560\ud50c\ub9ac\ucf00\uc774\uc158<\/th>Typical slice size<\/th>\ubb3c\ub7c9<\/th>Recommended machine<\/th><\/tr><\/thead>
    EV traction motors<\/td>30\u00d720\u00d73 mm arc segments<\/td>\ub192\uc740<\/td>SOM4-630D or SOM4-750D<\/td><\/tr>
    Industrial servo<\/td>15\u00d710\u00d72 mm blocks<\/td>\uc911\uac04<\/td>SOM4-630D<\/td><\/tr>
    Speaker \/ audio<\/td>50\u00d750\u00d75 mm rings<\/td>\uc911\uac04<\/td>SOM4-630D<\/td><\/tr>
    Wind turbine<\/td>100\u00d730\u00d720 mm segments<\/td>Low, thick<\/td>SOM4-1000D<\/td><\/tr>
    VCM \/ sensor<\/td>5\u00d75\u00d70.5 mm thin slices<\/td>High volume, thin<\/td>SOM2-600S<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    For EV motor magnet cutting specifics \u2014 including glue-then-cut arc segment production \u2014 see our EV motor magnet manufacturing equipment page<\/a>. For wind turbine segment production, see the wind turbine magnet cutting machine page<\/a>.<\/p>\n\n\n\n

    Magnet Wafering Machine Throughput Planning<\/h2>\n\n\n\n

    For anyone planning a slicing line, throughput math matters more than single-machine specs. Here is how magnet wafering machine throughput scales in practice:<\/p>\n\n\n\n

    Single SOM4-630D, 400 mm NdFeB block, 1.0 mm slices:<\/strong><\/p>\n\n\n\n