Posts Tagged ‘tensile samples’

Demonstration of the Tensilkut II

June 23, 2015

The Tensilkut II is used to easily prepare flat tensile, compression, flexural and other specimens from metals and non-metallics.  This machine is designed for operation in the testing lab by technicians without previous machining experience.

The starting blank is inserted into the Tensilkut Master Template, and the clamping screws are tightened as shown in this video.  The micrometer dial on the Tensilkut control head is set to its starting position, and a series of light passes are taken to cut the material from each side of the specimen.  When the correct tensile specimen dimensions are achieved, the micrometer dial will stop turning, thus preventing cutting an undersized test specimen.  After removing the completed ASTM E8 or other specimen from the master template, the tensile bar is ready for immediate testing.

40-70 Series Tensilbits

November 5, 2013

Tensilbits designed for use with the Tensilkut I and Tensilkut II series machines are essential to preparing your accurate test specimens. They are designed with specific angles, rakes and reliefs for accurate test sample preparation without distortion or tearing of the edges of your specimens. The 40-70 series Tensilbits are all .500″ diameter; all are designed for the best possible cutter life. If not chipped during use, Tensilbits can be resharpened for further use after they have become dull.

40-70 Series Tensilbits

40-70 Series Tensilbits for use with the Tensilkut I and Tensilkut II

Shown above, left to right: 40-71 Tensilbit, 40-72 Tensilbit, 40-73 Tensilbit, 40-74 Tensilbit, 40-75 Tensilbit, 40-76 Tensilbit, 40-71 TiN Coated Tensilbit

Please call, email, or fill out the form above for more information on Tensilbits.

ASTM D638 Samples

October 11, 2013

Samples can be made on any model Tensilkut machine quickly and easily.

Below are white corian ASTM D638 Type I specimen and ASTM D638 Type II specimen, and black phenolic ASTM D638 Type I and ASTM D638 Type II tensile bars.

ASTM D638 Type I and ASTM D638 Type II

ASTM D638 Type I and ASTM D638 Type II Tensile bars

Standard templates for many other test specimens are available.

CNC Tensilkut III Video

September 1, 2010

Because the recent video of the CNC Tensilkut III showed very little of the motion, here is a video in which the cutting head is moving along its X axis.  Note that no cutting is occurring in this clip.  This is a Quicktime video; please download Quicktime if you can’t view it.

Operation of the CNC Tensilkut III

August 25, 2010

While there are plenty of photos of the CNC Tensilkut III, this is the first time we’ve posted video of the operation of the machine. You will have to look closely, because these samples are lined up front to back on the table, so the cutting head is moving only a minor amount on a left/right or up/down basis, and the table is moving forward and backward for cutting the length of the specimen. When the camera pans to the view of the computer screen, the red shapes indicate the uncut specimens, while the blue lines display the sample which has already been prepared.

Because the door cannot be opened while the cutting operation is in progress, we can’t give a closer view of the operation of this machine.

Tensilkut II Demonstration

August 24, 2010

To aid you in picturing the operation of the Tensilkut II, here’s a video demonstration of the cutting of a piece of 1/8″ thick aluminum from start to finish.  The footage was taken from very close range, so there are no views of the entire machine.

Tensilkut II

April 2, 2009

For the first 30 years of this company’s existence, the Tensilkut I was the only machine for preparing flat tensile bars. It worked very well, of course; but at trade shows, the comment could often be heard, made by passers-by, “That’s a Tensilkut. Great machine. Noisy little thing.” And it was. For many years, customers inquired as to whether Tensilkut Engineering had plans to offer a soundproofed version of the machine.

In 1984, the company’s founder retired, and management was free to react to the customers’ stated desires. In 1985, the Tensilkut II was designed. The premise that the machine would be manually operated, as was the original version, but less objectionable in the lab, was the driving force behind the design. In the spring of 1986, the Tensilkut II was introduced at the Quality Expo in Chicago. There was a great deal of interest in the machine, and many users of the original machine upgraded to the newer version.

While the operational procedures are the same, the Tensilkut II contains many features which are either optional or unavailable on the Tensilkut I. Most obvious, of course, is the sound reduction package. The base of the machine is wrapped in the same soundshield used in music recording studios, and the control head is enclosed by a plexiglass shield around all sides save the front. A footswitch makes turning the machine on and off much easier, and all switches are located on the front of the machine for ready access. The machine also includes the Tensilvac chip reduction system, Tensilmist and motor speed regulator, all of which are optional on the Tensilkut I.

In 1987, after the company moved to its current location in Maryville, Tennessee, we ran an experiment. One of the men who worked at Tensilkut drove a 1973 Toyota pickup truck with no muffler, and someone else drove a 1 year old Cadillac Coupe de Ville. We measured the decibel readings for both the Tensilkut I and Tensilkut II with the motors on, but not cutting anything. The Tensilkut I had the same decibel reading as the Toyota, while the Tensilkut II generated the same noise as the new Cadillac, when the sound meter was right next to the hood.

This experiment, of course, lent credence to customers’ statements to the effect that they had to build a small room around their Tensilkut I machines to make the noise tolerable.

Tensilkut II

Tensilkut II

About Tensile Samples

March 31, 2009

A test specimen is the most important component of tensile testing, for it determines the actual physical properties of the material being tested. The specimen must conform to exacting physical dimensions and must be free of induced cold working or heat distortion. Qualified laboratory personnel and accurately calibrated tensile machines are important, but the ultimate test results are based on the quality and accuracy of the test specimen!

A highly skilled machinist using a conventional milling machine and considerable hand finishing can achieve the required configurations of the test specimen. However, the slow milling cutter speeds create heavy chip loads and can induce severe internal distortion to the machined edges. This distortion cannot be determined by visual inspection, hence, test results often produce erratic and inaccurate tensi9le properties.

The ideal tensile specimen should duplicate the pure basic metal or plastic being tested with a total absence of tool marks, incipient cracks, induced stresses, internal deformation or heat distortion. Tensilkut machines achieve these ideal requirements and produce virtually perfect test specimens.

Check back for more information on these machines, visit our website at or leave a comment with your email for more information!