Eccosorb®MF500F
High Temperature, Magnetically Loaded, Machinable Stock
HIGH TEMPERATURE MAGNETICALLY LOADED MACHINABLE STOCK
Eccosorb MF500F is a rigid, completely solid, magnetically loaded, high temperature
absorber. Physical and electrical properties are the same as those of the corresponding
member of the Eccosorb MF series. Eccosorb MF500F can be used for short periods at
260°C(500°F) permitting use at high ambient and/or high power levels.
FEATURES AND BENEFITS
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Rigid and machinable
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High Temperature
MARKETS
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Commercial Telecom
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Security and Defense
SPECIFICATIONS
TYPICAL PROPERTIES
Frequency Range
Short Time Service Temperature °C (°F)
Density g/cc
Hardness, Shore D
Tensile Strength (MPa)
Thermal Expansion per °C
Water Absorption, % 24 hours
Thermal Conductivity W/mK
ECCOSORB MF500F
>1 GHz
<260 (<500)
1.6 – 4.9
85
55
~30 x 10
<0.3
1.44
-6
Data for design engineer guidance only. Observed performance varies in application.
Engineers are reminded to test the material in application.
APPLICATIONS
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Eccosorb MF500F is widely used as absorbers, attenuators, and terminations in
waveguides and coaxial lines.
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It has also been successfully used as a high-Q inductor-core material in such devices as
slug tuners. It is also useful in many other magnetic components.
AVAILABILITY
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Eccosorb MF500F is available in six standard loadings. In general, as the frequency of
operation increases, the MF500 loading series decreases.
MF500F-110
MF500F-112
MF500F-114
MF500F-116
MF500F-117
MF500F-124
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Eccosorb MF500F is available in the following standard stock sizes :
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Sheets 30.5 cm x 30.5 cm (12” x 12”) in thicknesses of 0.32, 0.64, 0.95, 1.27, 1.59, 1.91,
2.54, 3.81, 5.08, 6.35, 7.62 cm (1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 1.0, 1.5, 2.0, 2.5 & 3.0”).
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Rods 30.5 cm long (12”) in diameters of 0.32, 0.64, 0.95, 1.27, 1.59, 1.91, 2.54, 3.81, 5.08,
6.35, 7.62 cm. (1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 1.0, 1.5, 2.0, 2.5 & 3.0” )
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Bars 30.5 cm long (12”) in squares of 0.64, 0.95, 1.27, 1.59, 1.91, 2.54, 3.81, 5.08 cm (1/4,
3/8, 1/2, 5/8, 3/4, 1.0, 1.5 & 2.0”).
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Other sizes, shapes, thicknesses, and configurations are available on special order.
INSTRUCTIONS FOR USE
Americas: +1.866.928.8181
Europe: +49.(0)8031.2460.0
Asia: +86.755.2714.1166
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Exposure to high temperatures should be limited. Slow changes in physical and electrical
properties occur at temperatures above about 177°C (350°F).
www.lairdtech.com
Eccosorb®MF500F
MACHINING RECOMMENDATIONS
Most of the discussion below applies not only to the basic Eccosorb MF500F series of materials, but also to several high temperatures, castable and
molding-powder equivalents. Eccosorb MF500F can be formed readily to close tolerances with standard metal-working machine tools, i.e.: lathes,
milling machines, drills, saws, grinders, generally using conventional techniques but observing the precautions and limitations described below.
Tooling :
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•
•
For turning, milling, drilling and tapping, carbide tools should be used, for example Type 883, a general purpose carbide that works well
under most conditions. Use solid carbide taps for long life. Standard size tap drills should be satisfactory.
External threads are formed best, not with conventional thread-cutting dies but by lathe turning or grinding, with light feeds and shallow
cuts.
Sawing can be done with best finish and tolerance using circular saws, 20.3 to 25.4 cm diameter, with grinding coolant and high RPM.
Thin carborandum wheels, 0,079 cm thick or carbide saws may be used where requirements are less stringent. Best results are attained
by moving the saw and keeping work stationary, with saw rotating so it tends to climb into the work.
Surface finishing of flat sheets, etc. is best performed with a Blanchard grinder. Eccosorb MF is held readily with magnetic chucks. Sheet
size is limited by the size of the machine.
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Coolants :
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Use of a coolant liquid is recommended, especially for all close tolerance operations. Commercial grinding fluid is preferred, or water-
soluble oil, with rust-resisting properties to protect the machines. Spark producing operations in particular must not be run dry, since
smoldering fires might result.
Where coolant run-off is collected for recirculation, a two-cavity recovery system should be used to minimize pick-up of grinding dust,
sawdust or chips by the coolant pump. Where a re-circulating system is not available, best results will be obtained with air-powered
spray or mist equipment.
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Use of tapped metal inserts should be considered where electrical performance will not be degraded. Inserts may be cast in place, or bonded with
castable material of suitable composition.
Suggested Speeds and Feed Rates
The following speeds and feed rates are suggested to be modified as necessary to suit job conditions:
OPERATION
Sawing, turning
SPEED
21.3 - 27.4 m/min
(70-90 ft/min)
21.3 - 27.4 m/min
(70-90 ft/min)
450 rpm
21.3 - 27.4 m/min.
(70-90 ft/min)
FEED
0.13 - 0.20 mm/revolution
(.005-.008 in/revolution)
0.038 mm/pass
(.001 in/pass)
Tapping Head
0.038 - 0.076 mm/tooth
(.0015-.003 in/tooth)
External threading
Tapping
Milling
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For complete properties and design considerations, see the Eccosorb MF technical bulletin.
RFP-DS-MF500F 092115
Any information furnished by Laird Technologies, Inc. and its agents is believed to be accurate and reliable. All specifications are subject to change without notice. Responsibility for the use and application of Laird Technologies materials rests with the
end user. Laird Technologies makes no warranties as to the fitness, merchantability, suitability or non- infringement of any Laird Technologies materials or products for any specific or general uses. Laird Technologies shall not be liable for incidental or
consequential damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies’ Terms and Conditions of sale in effect from time to time, a copy of which will be furnished upon request. © Copyright 2015 Laird
Technologies, Inc. All Rights Reserved. Laird, Laird Technologies, the Laird Technologies Logo, and other marks are trademarks or registered trademarks of Laird Technologies, Inc. or an affiliate company thereof. Other product or service names may be
the property of third parties. Nothing herein provides a license under any Laird Technologies or any third party intellectual property rights.
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