Archive for the ‘metal testing’ Category

Early Tensilkut Machines

October 9, 2017

When Tensilkut was first created, in 1953, there was one model, with a maximum capacity of .250″, and limited ability to cut tensile samples from harder materials.  Within a few years, this changed, and a machine with the capacity of up to .500″ on softer metals was added.  This is the press announcement:

Tensilkut press release from the late 1950s.

Tensilkut press release from the late 1950s.

Thereafter, Tensilbits and templates for preparing plastic, fiberglass and other nonmetallic tensile bars were added.  Today, our line includes the traditional Tensilkut I for cutting test specimens from flat metals and plastics, along with the Tensilkut II and CNC Tensilkut III, along with machines for turning round tensile specimens and notching impact and shear bend test bars.  How far we have progressed.

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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.

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.

 

The Original Tensile Sample Preparation Solution

August 29, 2017

The Tensilkut I is the original machine designed to prepare tensile and other test specimens from a wide variety of materials.  This precision machine is based on the unique concept of utilizing super high cutter rotation speeds to achieve dramatic reductions in chip load and cutting pressures; the Tensi8lbit produces 1000 cuts per second with the individual chips becoming fine shavings.  This high speed shearing action eliminates cold working or heat induced distortion to the sample edges.  Precise test specimens can be Tensilkut milled form aluminum, steel, stainless, titanium, pliable plastics, glass filled laminates, and a wide variety of other materials.  The configuration of the specimens is traced from a precision master template to achieve contoru duplication to with plus or minus .001″ (.025mm).

Dogbone sample cutter Tensilkut

10-68 Tensilkut I for preparation of flat tensile specimens

Contact us or visit our website for more information.

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.

Tensilkut, New and Improved

July 31, 2017

The new Tensilkut website is live; you’ll find information about all of our machines, along with more photos and links to our YouTube channel.

Need to make flat tensile bars? No problem! Round bars? Easy.  Flexural, impact, fatigue…it’s all here, waiting for you to visit.

 

Tensile, tensile-impact, impact and Iosipescu shear test bars made on the Tensilkut machines

Tensile, tensile-impact, impact and Iosipescu shear test bars made on the Tensilkut machines

We look forward to hearing from you!

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.

Tensilshear

May 23, 2015

The Tensilshear is an easy way to cut strips from small sheets of metal, including aluminum, brass, steel, and even harder materials.

Tensilshear for shearing straight strips from metals

Tensilshear for shearing straight strips from metals

A pair of micrometer adjustments on the back move the stop to enable you to simply push your sheet of up to 10″ wide metal under the blade until it reaches the stop, make sure it’s firmly in place, and cut off a strip.  The process can be repeated for as many strips as you need. It is a compact, manually operated unit, requiring neither electrical nor air hookup to operate.

The reverse of the Tensilshear, showing the micrometer adjustments for setting strip width

The reverse of the Tensilshear, showing the micrometer adjustments for setting strip width

 

The Tensilshear will shear strips from 1/8″ (3mm) thick aluminum or materials of similar hardness, and up to 2mm thick steel.  The hardened, precision ground blades are adjustable to eliminate virtually all edge burring problems.  The video below shows the Tensilshear being used to shear strips from 2mm thick hardened steel.

Visit our website or fill in the form below for more information or a quotation.