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Impeder Rods

Ferrite Impeder Materials
Ferrite Impeder rods and tubes are used for concentration of magnetic flux in RF induction welding of steel tubes. In this application ferrite core temperatures up to 150 degrees C can be experienced and the properties must be optimized for this environment. MMG has developed two materials specifically designed to meet the demanding properties required for induction welding. Impeder rods are available in F44L and F59 materials in a wide variety of configurations.

Fluted Tubes
These are principally used in return flow applications where it is important to ensure the inside of the tube remains dry. The flutes supply efficient cooling channels with the hollow central channel providing a return path for the coolant. They can also be utilized in integral mandrel impeders.

Part No.   Dimensions
O.D., I.D., Length
40-10C20-59   10x3x200
40-12C20-59   12x3x200
40-12H20-59   12x6x200
40-14G20-59   14x5x200
40-14J20-59   14x7x200
40-16G20-59   16x5x200
40-16J20-59   16x7x200
40-18H20-59   18x6x200
40-18L20-59   18x9x200

Plain Tubes
Plain tubes provide a hollow central channel for the coolant and can therefore be used for larger asssemblies where high temperatures may be experienced. Tubes can also be utilized in return flow assemblies.

Part No.   Dimensions
O.D., I.D., Length
35-05B16-59   5x2.5x160
35-05B20-59   5x2.5x200
35-06C16-59   6x3x160
35-06C20-59   6x3x200
35-08E16-59   8x4x160
35-08E20-59   8x4x200
35-10G16-59   10x5x160
35-10G20-59   10x5x200
35-12H16-59   12x6x160
35-12H20-59   12x6x200
35-14J16-59   14x7x160
35-14J20-59   14x7x200
35-16K16-59   16x8x160
35-16K20-59   16x8x200
35-18L16-59   18x9x160
35-18L20-59   18x9x200

Fluted Rods
Fluted rods have a number of slots or 'flutes' cut around the circumference. These 'flutes' increase the surface area of the rods providing more efficient cooling. They are most commonly used individually in smaller assemblies but can also be utilized

Part No.   Dimensions
O.D., Length
38-0516-44L   5x160
38-0520-44L   5x200
38-0616-44L   6x160
38-0620-44L   6x200
38-0716-44L   7x160
38-0720-44L   7x200
38-0816-44L   8x160
38-0820-44L   8x200
38-0916-44L   9x160
38-0920-44L   9x200
38-1016-44L   10x160
38-1020-44L   10x200
38-1116-44L   11x160
38-1120-44L   11x200
38-1216-44L   12x160
38-1220-44L   12x200
38-1316-44L   13x160
38-1320-44L   13x200
38-1416-44L   14x160
38-1420-44L   14x200
38-1516-44L   15x160
38-1520-44L   15x200
38-1616-44L   16x160
38-1620-44L   16x200
38-1716-44L   17x160
38-1720-44L   17x200
38-1816-44L   18x160
38-1820-44L   18x200
38-1916-44L   19x160
38-1920-44L   19x200
38-2016-44L   20x160
38-2020-44L   20x200
38-2116-44L   21x160
38-2120-44L   21x200

Plain Rods
The simplest type of ferrite rod and often used in multiples bunched together in larger impeder assemblies to allow coolant flow along the full length of the rods.

Part No.   Dimensions
O.D., Length
37-0516-59   5x160
37-0520-59   5x200
37-0616-59   6x160
37-0620-59   6x200
37-0716-59   7x160
37-0720-59   7x200
37-0816-59   8x160
37-0820-59   8x200
37-0916-59   9x160
37-0920-59   9x200
37-1016-59   10x160
37-1020-59   10x200
37-1116-59   11x160
37-1120-59   11x200
37-1216-59   12x160
37-1220-59   12x200
37-1316-59   13x160
37-1320-59   13x200
37-1416-59   14x160
37-1420-59   14x200
37-1516-59   15x160
37-1520-59   15x200
37-1616-59   16x160
37-1620-59   16x200
37-1716-59   17x160
37-1720-59   17x200
37-1816-59   18x160
37-1820-59   18x200

Flat-sided Rods
These rods incorporate two flat sides on an otherwise plain rod and can be used individually or bunched. The flat sides allow for a greater volume of coolant flow in more demanding applications.

Part No.   Dimensions
O.D., Length
39-0516-59   5x160
39-0520-59   5x200
39-0616-59   6x160
39-0620-59   6x200
39-0716-59   7x160
39-0720-59   7x200
39-0816-59   8x160
39-0820-59   8x200
39-0916-59   9x160
39-0920-59   9x200
39-1016-59   10x160
39-1020-59   10x200
39-1116-59   11x160
39-1120-59   11x200
39-1216-59   12x160
39-1220-59   12x200
39-1316-59   13x160
39-1320-59   13x200
39-1416-59   14x160
39-1420-59   14x200
39-1516-59   15x160
39-1520-59   15x200
39-1616-59   16x160
39-1620-59   16x200
39-1716-59   17x160
39-1720-59   17x200
39-1816-59   18x160
39-1820-59   18x200

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MMG-North America
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Tel: (973) 345-8900   •   Fax: (973) 345-1172
Mail us: sales@mmgna.com