Polymagnet Catalog

Polymagnet
Part Number: 1000318
Pairs with: 1000318
Overview

Align Polymagnets are engineered with a selective pattern that gives them a stronger holding force and unique alignment characteristics compared to conventional magnets. Standard magnets typically do not align with any level of precision when attaching to each other. These Align Polymagnets are designed provide a high holding force when aligned and very little attractive force when out of alignment. As these magnet approach alignment they provide a positive force toward the alignment position. This allows products and systems to be engineered with alignment behaviors that give them a unique user experience. These Polymagnets also have a high shear resistance along their long axis. Align Polymagnets exhibit a tightly controlled magnetic field that minimizes interference with sensitive devices. For more details visit www.polymagnet.com/blog/align.

Magnet Size and Material Specifications:
Shape Type:
Rectangle - 1/4 inch x 1/16 inch
Dimensional Tolerances:
0.005 inch
Weight:
0.008074 lbs
Material:
NdFeB
Magnet Grade:
N40
Coating:
Ni-Cu-Ni
Temperature Rating:
176° F
Application Notes

These Align Polymagnets provide superior linear alignment attributes compared to conventional magnets over their working range. A pair of 1000318 Polymagnets demonstrates a strong force toward their alignment position when offset on their long axis. These magnets can be used to align and attach components or accessories. By using multiple pairs in different arrangements the components can be made reversible or restricted to a particular orientation. Because of their alignment and shear resistance attributes these magnets can be used to transfer a linear force across a gap. The alignment force as a function of lateral offset can be seen in the graph below at a separation distance of 1.5mm.

When two 1000318 Polymagnets are laterally offset their attractive force decreases while their centering force increases. The magnets will have minor detents and a relatively low holding force when they are offset. This feature can be incorporated into a system to give feedback to the user during an assembly process.

The primary magnet face is marked with a circular polarity mark during production as shown in the Polymagnet CAD drawing linked below. The markings must be aligned and facing each other in the application for proper performance.

The holding strength for these Polymagnets can be enhanced in many applications by using a thin steel shunt directly against the back of the Polymagnet, and this shunt will also help limit stray fields from the magnet.

Polymagnet attachment forces for various targets
Magnet to target gap (inch)
0.010 thick steel (pounds)
0.031 thick steel (pounds)
0.250 thick steel (pounds)
1000318 to CMR 1000318
0.000
3.680
7.630
8.262
4.193
0.002
3.489
7.012
7.706
3.941
0.004
3.334
6.376
6.962
3.721
0.006
3.195
5.816
6.335
3.525
0.008
3.062
5.355
5.816
3.354
Polymagnet 1000318 vs Conventional Magnet on steel
Polymagnet 1000318 to Polymagnet 1000318 vs Conventional (Magnet on Magnet)


Polymagnet 1000318 Force vs. Displacement
Notes on Performance Data
The performance information provided in this data sheet is derived from test or simulation results of directly comparable magnets of the same size and grade under consistent conditions. The magnets are tested under controlled environmental conditions. Unconstrained application testing may give lower forces due to the magnet tilting or shifting away from target during engagement and disengagement.
Customization Options
Polymagnets can be engineered to optimize behaviors and forces for specific applications. Different holding forces as well as alignment characteristics and release behaviors are also available as options. This typically involves varying the size, shape, and grade of the magnet in addition to the custom engineering of the Polymagnet pattern. Visit www.polymagnet.com/blog/custom for more details.
Patent Information