Page 1422 - All Industrial Tool Supply | General Catalog

Magnets & Technical Information • MAGNETIC TOOLING
1419

Cylindrical Fixture Assemblies
Rare Earth Neodymium Magnets

HOLdING OuTSIdE TAp TAp MOdEL ORdER pRICE
CApACITY dIAMETER LENGTH SIzE dEpTH # # EACH
1 pOLE MAGNET IN AN ALuMINuM INSuLATEd Cup
0.25 lbs. .25" 1/2" #6-32 1/4" N250T 63-301-277 $8.59
1.30 lbs. .37" 1/2" #8-32 1/4" N375T 63-301-278 8.89 MOdEL #N250T MOdEL #R375 MOdEL #PF06N
2.65 lbs. .50" 1/2" #10-24 1/4" N500T 63-301-279 9.39
4.35 lbs. .62" 1/2" #10-24 1/4" N625T 63-301-280 11.89
6.0 lbs. .75" 1/2" #10-24 1/4" N750T 63-301-281 12.09
7.50 lbs. 1.00" 1/2" #1/4-20 1/4" N1000T 63-301-282 14.99
2 pOLE MAGNET IN A STEEL Cup Features:
3.0 lbs. .37" 1/2" #8-32 .085" R375 63-301-283 $14.89 1 Pole Magnet In An Aluminum • Cannot be press fit without
8.0 lbs. .50" 1/2" #10-32 .150" R500 63-301-284 16.19 Insulated Cup additional insulation.
22.0 lbs. .75" 1/2" #10-32 .150" R750 63-301-285 21.99 • Powerful compact magnet that can • Use tapped hole for mounting.
46.0 lbs. 1.00" 1/2" #1/4-20 .150" R1000 63-301-286 30.59 be press fit or use tapped hole • Diameter: ±.005"
2 pOLE MAGNET IN A BRASS INSuLATEd Cup for mounting. • Length: ±.015"
0.9 lbs. 06mm 20mm — — PF06N 63-301-287 $8.49 • Diameter: ±.003" • Maximum temperature: 180°F (82°C)
4.4 lbs. 10mm 20mm — — PF10N 63-301-288 9.29 • Length: ±.015 length 2 Pole Magnet In A Brass Insulated Cup
6.6 lbs. 13mm 20mm — — PF13N 63-301-289 11.19 • Maximum temperature: 180°F (82°C) • Ideal for metric press fit applications.
13.8 lbs. 16mm 20mm — — PF16N 63-301-290 12.49 2 Pole Magnet In A Steel Cup • Diameter & length: ±.002"
25.4 lbs. 20mm 25mm — — PF20N 63-301-291 15.49 • Ideal for shallow fixtures. • Maximum temperature: 180°F (82°C)

MAGNET BAsICs & sAFETy INFORMATION
MAGNET MATERIALS
Flexible magnetic strips are made of a Ferro-Magnetic powder with a polymer bonding.
These low energy strips resist demagnetization and will not chip, crack or shatter.
Flexible magnets form to any contour and are often used for labeling or
advertising purposes. Flexible magnets can be cut, drilled or shaped.
Maximum temperature 160°F (70°C).
Ceramic magnets are made of Strontium Ferrite (SrFe) in a s
intering process. Ceramic magnets are staples in the
electronic, automotive, medical, mining, oil industries, etc.
Ceramic magnets are medium strength magnet material
with a high resistance to demagnetization, long time stability
(loses 0.5% of it’s magnetic strength in 100 years),
brittle material that has to be cut with diamond tipped blades.
Maximum temperature 480°F (249°C).
Alnico magnets are made of Aluminum, Nickel and Cobalt (AlNiCo) in either a casting
or sintering process. Used in application environments that have high heat, Alnico magnets
offer medium strength and the best temperature characteristics of any standard magnet material.
Alnico magnets have a medium resistance to demagnetization and are very hard and brittle.
Machining or drilling cannot be accomplished by ordinary means. Maximum temperature 800°F (427°C)
Rare Earth Neodymium-Iron-Boron (NdFeB) magnets are made in sintered as well as bonded forms. Commonly referred to as Neo,
this magnet material provides the highest magnetic strength of any magnet material, very high resistance to demagnetization and is
ideal for applications requiring maximum strength in a limited area. Neo is usually coated or plated to prevent oxidization due to its
high iron content and therefore grinding of Neo material must be avoided. Maximum temperature 180°F (82°C).
Rare Earth samarium Cobalt (SmCo) magnets are made in a sintering process. Samarium Cobalt has the highest magnetic strength
to operating temperature ratio making it ideal for applications requiring very high strength in hot environments.
Maximum temperature 392°F (200°C).
MAGNET SAFETY FACTORS
When selecting a magnet for your application, consider the physical shape of the part (round, convex, concave, etc.)
and the surface condition (rough, rusty, dirty, oily). Both can result in air gaps* between the contact points on the
magnet & the work material, thereby reducing the magnetic power. Knowing these factors will aid in choosing
the correct magnet for your application.
• Surface & Finish • Part size, thickness and weight • Contact area between magnet & part
• Temperature • Material - Ferrous or non-ferrous • Continuous or intermittent operation
• Direction of magnetization • Gauss • Tolerance
*Air gap - The air, protective coating, paint, galvanizing, oil, rust, dirt, etc. between the magnet and the part.
LOSS OF MAGNETISM
Under normal use conditions, a permanent magnet can experience a decrease in its original holding value.
The most common factors which can cause a loss of strength include:
• Every day wear and tear on the magnet face such as: fine metal buildup, nicks or gouges, rust build-up, etc.
• Exposure to extreme temperatures
• Severe blow or shock to the magnet should be avoided as magnetic material can be brittle by nature. A broken or fractured magnet could
substantially lose its magnetic power.
• Exposure to electrical currents. Never place the magnet next to a large motor or generator. Never use the magnet as part of a welding ground circuit.
• Exposure to vibration.