Radial Pole Round Permanent Magnetic Chuck Specifications:
Model: MP-NR Series
Use:
Clamping for grinding and turning of ring-shaped workpieces
Features:
Max. magnetic clamping force up to 180 N/cm²
Concentric grooves simplify the centring of workpiece
Centre through hole is available on request for workpiece
T-slots available on request for pole extensions allowing 3 sided access in single set-up
Multi-Pole Circular Chuck Series
Rotary electromagnetic and electro-permanent chucks are made in radial pole multi-coil design for use in hard turning and free-state grinding. The radial pole design is recommended for holding circular workpieces such as rings and discs.
Most radial pole chucks come with t-slots, but tapped holes are also available for mounting tooling.
The smaller chucks have four or six poles, while the larger chucks use a ten or twelve-pole design.
Electromagnetic and electro-permanent designs
Radial pole, multi-coil design
Applications
Application workholding
Magnetic Workholding
Industries
Fabrication & Welding
Automotive Manufacturing
Appliance Manufacturing
Furniture Manufacturing
Equipment Manufacturing
Frequently Asked Questions (FAQ)
Q1: What is the difference between permanent magnetic chucks and electromagnetic chucks?
A: Permanent magnetic chucks use high-strength permanent magnets and require no continuous power supply, offering consistent holding force without electricity consumption. They are more energy-efficient and maintenance-free compared to electromagnetic systems that need constant power input.
Q2: What is the maximum holding force of your permanent magnetic chucks?
A: Our permanent magnetic chucks provide a holding force up to 180 N/cm². The actual holding force may vary depending on the workpiece material, surface condition, and contact area. Our technical team can help determine the optimal configuration for your specific application.
Q3: Can permanent magnetic chucks be used for wet grinding operations?
A: Yes, our permanent magnetic chucks feature IP67-rated waterproof construction, making them ideal for wet grinding applications. The sealed design prevents coolant infiltration and ensures reliable performance in wet machining environments.
Q4: What materials can be held by permanent magnetic chucks?
A: Permanent magnetic chucks are designed to hold ferromagnetic materials such as steel, iron, and nickel alloys. The holding force depends on the material’s magnetic permeability and carbon content. Non-ferrous materials like aluminum, brass, or stainless steel (depending on grade) may require additional fixturing solutions.
Q5: How long does the magnetic force last in a permanent magnetic chuck?
A: Our permanent magnetic chucks are designed to maintain their magnetic force for decades with proper use and maintenance. The high-quality magnetic materials used in construction ensure minimal force degradation over time. Regular inspection and proper handling will help maintain optimal performance throughout the chuck’s lifetime. Circular Standard Electro-permanent Magnet Chuck
| NR-100 | 100 (3.94) | 60 (2.36) | 60 (2.36) | 85 (3.35) | 16 (0.63) | 4 | 6 | 4 (0.16) | 3.3 kg / 7.26 Ib |
| NR-130 | 130 (5.12) | 60 (2.36) | 50 (1.97) | 100 (3.94) | 20 (0.79) | 4 | 6 | 4 (0.16) | 6 kg / 13 Ib |
| NR-150 | 150 (5.91) | 60 (2.36) | 90 (3.54) | 115 (4.53) | 20 (0.79) | 4 | 8 | 4 (0.16) | 8 kg / 18 Ib |
| NR-160 | 160 (6.30) | 60 (2.36) | 120 (4.72) | 140 (5.51) | 20 (0.79) | 4 | 8 | 4 (0.16) | 10 kg / 22 Ib |
| NR-200 | 200 (7.87) | 60 (2.36) | 160 (6.30) | 180 (7.09) | 28 (1.10) | 4 | 8 | 4 (0.16) | 14 kg / 31 Ib |
| NR-250 | 250 (9.84) | 60 (2.36) | 200 (7.87) | 230 (9.06) | 32 (1.26) | 4 | 10 | 4 (0.16) | 23 kg / 51 Ib |
| NR-300 | 300 (11.81) | 80 (3.15) | 250 (9.84) | 270 (10.63) | 40 (1.57) | 7 | 12 | 4 (0.16) | 43 kg / 95 Ib |
| NR-320 | 320 (12.60) | 80 (3.15) | 250 (9.84) | 270 (10.63) | 40 (1.57) | 6 | 12 | 4 (0.16) | 50 kg / 110 Ib |
| NR-350 | 350 (13.78) | 80 (3.15) | 250 (9.84) | 280 (11.02) | 40 (1.57) | 6 | 12 | 4 (0.16) | 59 kg / 130 Ib |
| NR-400 | 400 (15.75) | 80 (3.15) | 200 (7.87) | 260 (10.24) / 340 (13.39) | 55 (2.17) | 12 | 10 | 6 (1.81) | 78 kg / 172 Ib |
| NR-500 | 500 (19.69) | 95 (3.74) | 200 (7.87) | 300 (11.81) / 400 (15.75) | 60 (2.36) | 12 | 10 | 8 (0.31) | 146 kg / 321 Ib |
| NR-600 | 600 (23.62) | 95 (3.74) | 250 (9.84) | 350 (13.78) / 450 (17.72) | 90 (3.54) | 12 | 10 | 8 (0.31) | 210 kg / 462 Ib |
Unit: mm(in)
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