Archive for the ‘flat tensile bars’ Category

Special Master Templates

July 18, 2018

For nearly as long as Tensilkut machines have existed, people have wanted to prepare custom test specimens.  These are some of the more unusual ones:

This is a special template to cut micro tensile bars from very tiny pieces of materials.  Typically, this is the type of test specimen one might use if cutting from precious metals, or from “historic” material which has been in storage, and to which a comparison with a modern material is desired.  These are also used to prepare samples from materials which are irregularly shaped, and therefore, only a small piece can be obtained for the test.Micro Tensile Template 006

I truly have no idea who ordered these Special Templates, or what the purpose was of having multiple reduced sections.  I only know that these are very interesting in appearance, and the story behind them must have been somewhat intriguing.  Note that these specimens have holes in them for pin loaded grips; Tensilkut Engineering can install hardened bushings for guiding the drilling of such holes.

Special Templates 005

If you need to create a custom specimen, why not submit your drawing to Tensilkut for a quotation on a system to meet your needs?

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Tensilkut Master Templates

February 12, 2018

Whether you need a template to prepare samples to a custom specification,

Large and small special Master Templates for use with the Tensilkut I or Tensilkut II.

Large and small special Master Templates for use with the Tensilkut I or Tensilkut II.

Or one of our standard templates for metal or non-metallic bars,

Tensilkut Master Templates for ASTM E8 specimens

Tensilkut Master Templates for ASTM E8 specimens

Tensilkut Engineering has or can make your template, to be used with your existing Tensilkut I or Tensilkut II.

Please contact us for additional information and a quote.

40-75 Tensilbis

October 11, 2017

The 40-75 Tensilbit is our carbide burr Tensilbit.  It is .500″ diameter, suitable for use on all Tensilkut I or Tensilkut II machines.  The 40-75 Tensilbit is suitable for cutting test specimens from fiberglass, composites, filled and similar materials; the cross cut effectively cuts the fibers in these materials, ensuring a smooth finish for the best possible test specimen.  Note, however, that Kevlar does require one finishing pass of .002″ with the 40-76 Tensilbit, to clean up the lower edge of the specimen before it’s removed from the template.

40-75 Tensilbit end view

40-75 Tensilbit

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.

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.

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.

To Cut Straight Strips

September 12, 2017

Straight strips are a very valuable commodity in the laboratory.  In addition to needing a straight strip as the basis for cutting a test specimen, whether tensile, compression or another test, the straight piece is necessary for flexural testing, and is very valuable for other tests, including hardness testing.  The Tensilsaw is a very convenient way to cut strips from small plaques of plastic, fiberglass, composites, glass laminates and other non-metallic materials.

Visit our website or our YouTube channel for more video demonstrations of the Tensilsaw and our other equipment.

 

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.

 

ASTM D638 Type IV Test Specimens

August 31, 2017

ASTM D638 Type IV is a small tensile specimen used in testing plastics.  It’s a difficult sample to cut, because it has both an inside and outside radius.

ASTM D638 Type IV tensile bars

Tensilkut Engineering makes Master Templates which will work with any Tensilkut I or Tensilkut II to prepare samples in accordance with ASTM D638 Type IV. Each template is sized with a top bar which matches the height of the control head for the Tensilkut machine with which it will be used.

Tensilkut Master Templates 50-92, 50-93 and 50-94 for preparing rubber test specimens in accordance with ASTM D412 Die C: Available for use on Tensilkut I and Tensilkut II models.

Tensilkut Master Templates 50-92, 50-93 and 50-94 for preparing rubber test specimens in accordance with ASTM D412 Die C: Available for use on Tensilkut I and Tensilkut II models.

50-94 Tensilkut Template for ASTM D412 Die C

50-94 Tensilkut Template for ASTM D412 Die C

For more information on the ASTM D638 Type IV and other Tensilkut Master Templates, visit our website.

More Ways to Follow Us

August 30, 2017

Tensilkut is now on Twitter @TheTensilkut and Google+.  Follow us in order to receive notification of new blog posts.

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.