Achieve More Efficient Machining
MPI’s Double Rare Earth Round Chuck is a high-performance, power-free workholding solution designed to deliver exceptional magnetic clamping force and deeper flux penetration for demanding grinding and turning of large or thick round ferrous workpieces. Utilizing two stacked circuits of high-energy rare earth magnets, this advanced chuck provides greater holding strength and uniform clamping across the entire face, minimizing part vibration and movement even under aggressive cuts. Its robust, sealed construction resists coolant and swarf intrusion, ensuring reliability in toolrooms and high-production machining environments where precision, repeatability, and safety are paramount.
Benefits of the Double Rare Earth Round Chuck From Magnetic Products, Inc
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Double Rare Earth Magnet Circuits
Twice the magnetic power and deeper field reach compared to standard single-circuit chucks.
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Exceptional Clamping Force
Ideal for large-diameter, thick, or heavy round parts requiring high holding torque.
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Uniform Pole Configuration
Consistent magnetic flux ensures minimal part deflection and excellent surface finish.
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Power-Free Operation
The permanent magnet design needs no electricity and has fail-safe holding even in power loss.
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Manual On/Off Switching
Simple lever or wrench-controlled switching for quick engagement and clean part release.
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Sealed Heavy-Duty Build
Withstands harsh grinding fluids, chips, and abrasive swarf.
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Supports Heavy-Duty Grinding & Turning
Designed for deep cuts, roughing passes, and precision finishing alike.
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Reduces Fixture Complexity
Replaces multiple mechanical clamps, improving setup time and operator safety.
Double Rare Earth Round Chuck Product Details
Due to the top plate with radial poles, the MPI Double Rare Earth permanent chuck is primarily designed for turning and grinding round and ring-shaped workpieces. The advantage is the possibility to machine the front, inner, and outer diameter of the workpiece in one operation.
Install
Secure the Double Rare Earth Round Chuck to your rotary table, surface grinder, or vertical turning lathe.
Place Workpiece
Center the large, round or ring-shaped ferrous part directly on the chuck face.
Engage Magnetic Hold
Use the switch lever or hex key to rotate the internal mechanism, aligning both rare earth magnet circuits. This activates a deep, strong magnetic field.
Clamp
The magnetic force penetrates deep into thick parts, locking them firmly against the chuck with uniform pressure across the face.
Machine
Carry out heavy grinding or turning operations with reduced part shifting, vibration, or chatter risk.
Release
When finished, rotate the switch back to OFF to collapse the magnetic field.
Unload
Remove the workpiece easily — no residual magnetism remains.
Double Rare Earth Round Chuck Specification Table
US Customary Units
| MODEL # | DIAMETER (IN.) | HEIGHT (IN.) | CENTER T-SLOT DIAMETER (IN.) | INNER LOCK DIAMETER (IN.) | OUTER LOCK DIAMETER (IN.) | WEIGHT (LBS.) |
|---|---|---|---|---|---|---|
| RC-130-REN | 5 | 2.2 | 0.59 | - | 3.9 | 11 |
| RC-150-REN | 6 | 2.2 | 0.59 | 3.15 | 4.7 | 16 |
| RC-200-REN | 8 | 2.2 | 0.59 | 3.15 | 4.7 | 16 |
Compatibility Check - Double Rare Earth Round Chuck Installations
MPI Double Rare Earth Round Chuck Ideal for Heavy Rotary Surface Grinding
MPI Double Rare Earth Round Chuck for Turning or Facing Large Round Parts on Vertical Lathes or Rotary Tables
MPI Double Rare Earth Round Chuck for High-Accuracy Production Grinding Where Secure Clamping is Critical