The Varimac V, latest in MAC's line of eddy current comparators gives you fast, convenient sorting of metal parts such as fasteners, bearings, and other cold formed pieces. Its high speed continuous operation and reliability in production environments make 100% non destructive inspection economically feasible. It is also used for checking alloy and hardness in bar or wire.
Typical Application: Detect variations in alloy, hardness, some dimensions and certain types of cracks in metal bar, tube or parts. Also used for high speed sorting of parts such as fasteners and bearings. Used with MAC's Parts Gates, parts can be sorted and counted at speeds up to six parts per second into three separate groups.

PDF File:  Varimac.pdf
For Use With:  Bars and Rods ,  Metal Parts ,  Tubing

Optional, user friendly tube mapping software produces a permanent tube map of the results, either during or after the job. Data can be shown in tubular, chart or tube map mode and the tube map can be customized for the specific heat exchanger configuration.
Typical Application: On site non destructive inspection of specialty stainless alloy and titanium tubing in condensers, evaporators and similar portions of air conditioner units.

PDF File:  Promac 141 Flyer.pdf
For Use With:  Tubing

Typical Application: Magnetic wire rope testing for broken stands either in the field, or in the factory.

For Use With:  Wire

Proper positioning of the eddy current test coil with respect to the material being tested is a key ingredient of any eddy current inspection system. MAC Coil Platforms can be adjusted vertically and horizontally to provide proper alignment with the material to be tested. Encircling (throughput) or tangent (sector) test coils can be accomodated.

Coil Platforms for Testing Non Magnetic Material: Standard Coil Platforms are designed for the inspection of non magnetic material.

Coil Platforms for Testing Magnetic Material: Specially designed DC Coil Platforms incorporate a direct current encircling saturation coil which is necessary for testing most magnetic material. By adequately saturating the test material, accurate test results can be obtained.

In most cases, DC Coil Platforms for encircling test coils require a continuous supply of water for cooling. Tangent Coil Platforms, however, do not require water. Contact MAC for specific water and power requirements for Coil Platforms.

Rotary Mechanisms

When using spinning eddy current probe or magnetic flux leakage inspection equipment, a Rotary Mechanism which incorporates the eddy current probe coils in a housing designed to spin the probes around the material, is used instead of a standard encircling or segment coil. The Rotary Mechanism may be adjusted for proper elevation and horizontal position, similar to Coil Platforms.

Drive Mechanisms -

Bottom Vee roll Systems MAC Drive Mechanisms consist of a series of bottom "V" drive rolls, each with a corresponding top air or spring loaded adjustable pinch roll. This three point contact, ensures consistent pressure on different sized test material. Sophisticated controls are also available to create an entirely automated integrated system.

Constant Center Drive Systems MAC's subsidiary M A Nordic offers a constant center, automated triple drive and table to accommodate several testing systems, including stationary or rotary eddy current or ultrasonic instruments. A single point adjustment of the table and diameter of the triple driving and centering guide aligns the table and testers with the production line. It is especially applicable to products such as tubes with badly formed ends, upset pipe or difficult straightening applications. Typical Application: Coil Platforms, Rotary Mechanisms, Drive Mechanisms and Tables are an integral part of most eddy current, flux leakage or ultrasonic test systems. They are used in testing bar, tube, and wire.

PDF File:  coil platforms final.pdf
For Use With:  Bars and Rods ,  Metal Parts ,  Tubing ,  Wire

At left is a view of a MAC Feed System with a feed table and receiving pocket. Below left are receiving pockets with "easy down" belt feature to prevent bars from hitting the bottom.

Typical Application: Automated feeding, rejecting and handling of bars and tube in ndt test stations.

PDF File:  FEEDSYSTEMS.PDF
For Use With:  Bars and Rods ,  Tubing

Models include:

Low Power for up to 1.75" (44 mm) Diameter Light Material such as thin wall tube and small parts

Customized Parts Testers
Highly sophisticated customized parts testers using several test technologies and appropriate automated handling equipment have been developed and produced for inspecting shell bodies, grenades, bearing races, and automotive parts, among others.
Typical Application:  Inspect and sort for hardness, alloy, or other physical characteristics in metal parts.

For Use With:  Metal Parts

To use the Magnetic Analysis Magnetism Detector, simply place the base of the indicating needle near the end of the bar or similar object you are testing. The degree of magnetization is indicated by a reading up to +/- 20 gauss. When checking magnetized bar stock or tubing, a reading of 10 or less is usually acceptable.

To order, send email to info@mac-ndt.com or fax to 914-699-9837. Price: $ 24.50 each + shipping & tax $ 19.50 each (on orders of 10 or more) + shipping & tax
Typical Application: Applications: widely used by steel suppliers and fabricators of bar, tubing or parts where magnetism might interfere with subsequent machining or handling operations, or with the end use of the product. Also used to check products such as tools or aircraft parts. Note: It is not suitable for measuring the strength of electromagnetic fields created by AC power lines.

PDF File:  Magnetism Det 08.pdf
For Use With:  Bars and Rods ,  Metal Parts ,  Tubing ,  Wire

The rotary eddy current test utilizes test probes which spin around the wire as it passes through. The helix test pattern that results detects long defects that are present, at each pass. By using rotary probes to detect long defects in combination with an encircling coil to detect short defects, the Rotomac BQ detects the widest range of flaws, even at the high through put speeds typical of wire production.

The electronics analyze and present an integrated screen of the data from both the rotary and encircling tests on a monitor. Results are color coded for severity. Low level defects can be counted per unit of length and defects detected by the rotary and encircling tests can be recorded, integrated, stored and networked.

Systems for wire ranging up to 37mm diameter are available. Customers who already have an encircling coil system in place can "upgrade" to a Rotomac® BQ complete system with the addition of the rotary tester. For new installations, the customer can install the complete system or begin with either an encircling or rotating test, depending on the type of defects that are most prevalent, and then add the other test at a later date.

Typical Application: Testing wire in hot rolling mills

PDF File:  rotomac BQ hot test.pdf
For Use With:  Bars and Rods ,  Wire