Magnet Slicing Machines — Complete Selection Guide

Permanent magnet manufacturing relies on block tiling: small sintered NdFeB blocks (typically 30×30×10 to 60×40×15 mm) are glued together with epoxy adhesive into long bars matching the machine's load tray length. Multiple bars are stacked and arranged to fill the entire load tray volume, then sliced as a single workpiece. After cutting, the adhesive is dissolved or melted to release thousands of individual magnet wafers.

The industry standard is a thermosetting epoxy resin with good cutting-fluid resistance during slicing and a clean release method (typically thermal at 80–150°C, or solvent-based for special grades). The adhesive layer is kept thin (0.05–0.1 mm) to minimize tiling losses. Bond strength must hold during slicing but release cleanly without leaving residue on the magnet faces.

Because load tray capacity drives monthly output, not block size. A larger load tray means more blocks per cycle, which means more wafers per day. A small machine designed for "small blocks" misses the point — your magnet blocks are already small. The question is how many you can tile into the machine at once. For volume production, larger trays (SOM4-630D and up) deliver far better ROI than small machines, regardless of your input block size.

Yes, but with adjusted parameters and diamond wire. NdFeB and Ferrite share similar Mohs hardness (5–6 and 4–4.5) and can run on the same wire grade at adjusted feed rates. SmCo is harder and more brittle — we recommend a finer wire grit and slower feed, ideally on the oscillating SOMS3-430S to reduce edge micro-cracking.

SOM2-600S supports slices down to 0,3 mm, suitable for VCM (voice coil motor) magnets and sensor applications. Going below 0.3 mm typically requires post-cut grinding rather than as-cut precision. For ultra-thin requirements, plan for downstream double-sided lapping to achieve ±0.02 mm thickness tolerance.

For a fully tile-loaded SOM4-630D dual station with 2 mm slicing and 0.28 mm operating kerf: 8–10 hours per cycle, producing ~5,600 wafers per cycle. Higher-grade NdFeB (N48 and above) takes 10–20% longer due to higher coercivity and density. Thinner slices (under 1 mm) also extend cycle time slightly — and the kerf-to-slice ratio becomes the dominant yield driver: at 0.5 mm slice with 0.28 mm kerf, material utilization drops to ~64%.

For standard NdFeB slicing (2–10 mm pitch): 0.20–0.25 mm wire diameter with diamond grit size #800–#1000. For thin slicing under 1 mm: 0.15–0.18 mm wire with finer grit #1500–#2000 to minimize kerf loss. Brazed diamond wire is strongly preferred over electroplated for tiled magnet production due to 3–5× longer wire life — particularly important when cutting through adhesive layers between blocks.

Yes. We have guided multiple Baotou-cluster customers through ID-to-multi-wire migration. The transition typically includes: parameter mapping from your existing ID saw process, block-tiling training (often new to teams used to single-block ID sawing), parallel-running validation, operator training (2–3 days on-site), and ROI documentation showing payback period (typically 8–18 months depending on volume).

Yes. Vimfun offers free sample cutting. Send us your standard production blocks (typically 5–20 pcs of 30×30×10 mm or your actual size). We'll tile, slice, document all process parameters, and ship the sliced wafers back for your inspection. Sample turnaround is normally 1–2 weeks.