Posts Tagged ‘ASTM E8’

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.

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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.

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.

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.

Tensilkut Master Templates for Subsized Metal Specimens

May 7, 2015

The 50-30 series Tensilkut Master Templates are used to prepare modified ASTM E8 subsized specimens, with a .250″ x 2″ gauge section.

Tensilkut Master Templates 50-34, 50-36, 50-38

Tensilkut Master Templates 50-34, 50-36, 50-38

50-34 Template for use with 10-20 and 10-40 series Tensilkut I and 10-82 Tensilkut II

50-34 Template for use with 10-20 and 10-40 series Tensilkut I and 10-82 Tensilkut II

50-36 Template for use with Tensilkut I and Tensilkut II

50-36 Template for use with Tensilkut I and Tensilkut II

50-38 Template for use with Tensilkut I and Tensilkut II

50-38 Template for use with Tensilkut I and Tensilkut II

Tensilkut Master Templates for ASTM E8 Subsized Specimens

May 7, 2015

The 50-20 series Tensilkut Master Templates are used for preparing metals specimens in accordance with ASTM E8 for subsized bars.

Tensilkut Master Templates 50-24, 50-26, 50-28

Tensilkut Master Templates 50-24, 50-26, 50-28

50-24 Template for preparing ASTM E8 Subsized Tensile Specimens

50-24 Template for preparing ASTM E8 Subsized Tensile Specimens

50-26 Tensilkut Master Template for ASTM E8 Subsized Specimens

50-26 Tensilkut Master Template for ASTM E8 Subsized Specimens

50-26 Tensilkut Master Template for ASTM E8 Subsized Specimens

50-28 Tensilkut Master Template for ASTM E8 Subsized Specimens

Customized Master Templates

November 8, 2013

Sometimes a Tensilkut user needs to cut a specimen in accordance with a standard, such as ASTM E8, but needs the finished specimen modified to suit the material he has available.  Often, this entails making a different overall width for the template.  Such was the case recently, where a customer starts with 1.25″ wide material, but cuts his pieces in accordance with the gauge section detailed by the ASTM E8 standard for sheet type metals, with the .500″ x 2″ gauge length and 2.25″ reduced length.

Modified ASTM E8 template, with completed specimen

Modified ASTM E8 Template, with completed specimen

Tensilkut designed a template to accommodate this customer’s needs, with the extra width built into the body of the Master Template, while all other dimensions meet the ASTM E8 standard.  If you have need of a customized specimen such as this, please send us your specific requirements, so we can quote.

ASTM E8 Threaded Tensile Bars

October 16, 2013

ASTM E8 threaded tensilesThese round tensile bars to ASTM E8 were turned with the CNC Tensilathe, using the optional threading package.  The larger bar is the standard .505″ x 2″ gauge section; the smaller is the .250″ x 1″ subsized ASTM E8 specimen.