Permanent Rotary Magnetic Chucks With Radial Poles 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
permanent rotary magnetic chucks are radial poles with neodymium (rare earth) magnet material designed for holding rings and bearing races, as well as solid rounds. This chuck comes standard without a center hole. An optional through hole can be provided upon request.
Magnetized with Neodymium (rare earth) magnet material
Radial poles ideal for holding rounds
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. Round Electro-permanent Magnetic Chuck for Grinding of Disc Shaped Workpieces
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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