Archive for the ‘ASTM E8’ Category

10-13 Tensilkut I

December 7, 2017

The 10-13 Tensilkut I is the same size and model as the original Tensilkut machine first made back in 1955.  This machine has the smallest motor of any Tensilkut machine, whether a Tensilkut I or Tensilkut II, and consequently the lowest cutting capacity.  It also, true to the Tensilkut heritage, does an excellent job of preparing tensile specimens from thin materials.  While we don’t recommend this model for cutting steel samples of more than 1/8″ thickness, and certainly not for harder materials, it does a superb job at preparing aluminum and softer materials of up to 1/4″ thickness.

10-13 Tensilkut I with 50-12 Master Template

10-13 Tensilkut I with 50-12 Master Template

The 10-13 Tensilkut I is a fine choice for a small testing lab, where space is at a premium, or where only a limited number of specimens are needed.  As with other Tensilkut machines, this machine will prepare specimens in a wide variety of specifications, including ASTM E8, ASTM A370, ASTM D638, or whatever you might need.  Contact us for more information and a quote, or visit our Tensilkut website for more information on this and other equipment to make your lab more productive.

Turning Round Tensile Bars

November 16, 2017

Tensilathe in operation, turning a stainless steel bar in accordance with ASTM E8.

Turning a Round Tensile Bar

Turning a Round Tensile Bar

The machine is simplified in operation, and completes round tensile bars quickly.

Contact us for more information on making your lab more efficient with the Tensilathe from Tensilkut Engineering.


Cutting Round Monel Tensile Bars

November 6, 2017

Recently, we shipped a CNC Tensilathe to a customer who was cutting, amongst other materials, Monel.  This is a very hard material to cut, but the CNC Tensilathe handled it well.  These are pictures of a shaving from the monel bar, as it was being cut; we cut it in .012″ deep passes, which would equate to approximately 10 passes for an ASTM E8 bar cut from a .750″ diameter starting piece.

The starting end of a shaving from a Monel bar, cut in accordance with ASTM E8 on the CNC Tensilathe

The starting end of a shaving from a Monel bar, cut in accordance with ASTM E8 on the CNC Tensilathe

A shaving from the cutting of a Monel Tensile Bar using the CNC Tensilathe.

A shaving from the cutting of a Monel Tensile Bar using the CNC Tensilathe.

Starting with an irregular bar would require more and shallower cuts, but with Tensilkut’s CNC machines, we program the specimens for your starting size and shape, and you insert the blank into the machine, select the specimen from the drop down menu on the integral computer, and walk away until the cycle is finished, and your specimen is complete.

Contact us for more information on how the CNC Tensilathe can help your testing lab become more efficient.

CNC Tensilkut III For Multiple Samples

October 3, 2017

Often, our customers are interested in the CNC Tensilkut III to gain the ability to clamp multiple blanks into the machine, start it and have the freedom to do other things while the machine cuts specimens unattended.  To that end, we typically set up the CNC Tensilkut III with multiple work stations, so several specimens (typically between 4 and 6, depending upon the size) can be cut at once.  This is a typical table, configured to clamp 6 strips for the preparation of ASTM E8 samples.

The table for the CNC Tensilkut III, configured for multiple tensile specimens

The table for the CNC Tensilkut III, configured for multiple tensile specimens

Once the strips are clamped to the table, the specimens are chosen on the included computer, using our Windows-based point and click system; the machine then runs through its cycle without any operator interaction.  When it’s finished, the CNC Tensilkut III shuts down, indicating that it’s safe to open the front door and remove the specimens, at which point it can be reloaded for another set of specimens. When located in the testing lab, a Tensilkut machine lets you cut your tensile bars as you need them, on your schedule.

Turning Round Tensile Bars

September 29, 2017

Turning round tensile test bars has always been a difficult and tedious process.  A full charge machinist can turn a test specimen using a lathe, but it will take some time, and, unless the machinist is fastidious, it may not be within the tolerances required by the specification.  Additionally, since machinists will often turn bars using only the largest possible passes, the bar will likely need hand finishing to remove distortion caused by the turning process.

Tensilkut has two machines designed to allow you to turn round tensile bars in accordance with ASTM E8, ASTM A370, JIS, DIN and ISO specifications in the lab.  Technicians without previous machining experience can learn to run these machines in short order; as with our other machines, these machines are supplied with a self-instruction manual, so it can be used by different operators as time goes on.

The Tensilathe/505 is our semi-automatic tracing lathe.  It operates from a Master Template, which controls the shape and dimensions of the specimen.  The operator needs only to dial in each cut to prepare a perfect tensile bar.

Tensilathe/505 semi-automatic tensile sample turning machine

Tensilathe/505 semi-automatic tensile sample turning machine

The CNC Tensilathe is the automated round test specimen preparation system.  This machine runs on a Windows-based microcomputer; specimen preparation is accomplished with a point and click software system.  After setting up the specimen, the operator is free to complete other tasks while the sample is turned automatically.

CNC Tensilathe for the automatic turning of round tensile specimens from most metals

CNC Tensilathe for the automatic turning of round tensile specimens from most metals

Please call 865-982-6300 for further information, or fill in the contact form below for a speedy response.

CNC Tensilkut III for Hardened Steel

September 26, 2017

This is a video demonstration of the CNC Tensilkut III cutting out the gauge section for one specimen of 1.4mm thick hardened steel. The starting size was 3/4″; the finished specimen is in accordance with ASTM E8, with the .500″ x 2″ gauge section, and the included .003″ taper.

This demonstration is 8 minutes long, and shows the entire cutting process.  Please contact us for more information or a quotation.

Tensilkut: Tensile Sample Preparation Gold Standard

September 5, 2017

Tensilkut has the capacity to accurately machine tensile specimens from ferrous and non-ferrous metals and non-metallics from .002″ thickness up to .250″ or more, depending upon the model of the machine and the hardness of the material.  The Tensilkut series is fast; test specimen preparation can be completed in as little as 3 minutes, depending upon the material and its thickness.  The machined edges are so finely finished that no hand finishing is required.  The capacity to satisfactorily machine such light gauges as .002″ thick allows testing of many materials for which specimen preparation would otherwise be significantly more difficult.

Tensilkut test bars

Some of the bars cut on Tensilkut machines include ASTM D638 Type I tensile bars, ASTM D412 Die C tensile bars, ASTM D1855 Type L Tensile-Impact specimens, ASTM D256 Impact specimens, and ASTM D5379 Shear Test Specimens.

pipe wall tensile sample

sample cut from large diameter pipe wall

Visit our website for more information on Tensilkut equipment to solve your flat sample preparation needs.


Tensilkut Catalog, Circa 1955

August 9, 2017

In this day of instant electronic communication, it’s hard to believe that 60+ years ago, not only was everything mailed, but Tensilkut’s catalog, when it arrived in the mailbox, contained a tensile test bar which had been cut on the Tensilkut.

Tensilkut catalog with aluminum tensile sample

The 1955 Tensilkut catalog included a drawing of the only tensile bar we made at the time, along with an actual specimen!

I don’t imagine the founder of Tensilkut ever imagined a time when we could not only send information to customers nearly instantly, but also a time when we’d be able to make videos available for people to see whenever they wished.  Despite sea changes in communication, the need for his original machine remains very real – and at least one of the machines made in his first couple of years remains in service today.

A Blast From The Past

August 7, 2017

Recently, while browsing the Tensilkut Ancient History file, our catalog from October 1, 1956 appeared.  It was a simple affair, with a heavy sheet as front and back cover, and a single sheet describing the entire Tensilkut line, consisting of the Tensilkut (one model only) and its template.  The cover was adorned with a four-color photograph, glossy, of course (at a time when color photography was less common and rather expensive).

Tensilkut I

The cover of the original Tensilkut catalog, from October 1, 1956!

How far we have progressed today, to our line containing numerous models of the Tensilkut I, Tensilkut II and CNC Tensilkut III for preparing flat tensile specimens, along with the Tensilgrind for high hardness flat samples, and machines for round and notched test specimen preparation!

Visit our website at to see how greatly our line of equipment has expanded, and how we can assist you with your test specimen preparation needs.

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.