Archive for the ‘Tensilkut I’ 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.


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.

Guide Sleeves

October 4, 2017

It’s not terribly uncommon for the guide sleeve on the Tensilkut I or Tensilkut II to be worn.  The guide sleeve is integral to the Tensilkut machine’s ability to create the same specimen repeatedly, without the skills a full charge machinist offers.

Guide sleeve on the Tensilkut machine, showing early signs of wear

Guide sleeve on the Tensilkut machine, showing early signs of wear

We do keep guide sleeves in a variety of sizes in stock for shipment when our customers need them.  They’re easy to replace, keeping your testing program running smoothly.

Guide Sleeves for the Tensilkut I and Tensilkut II

Guide Sleeves for the Tensilkut I and Tensilkut II


How Long will a Tensilkut Machine Last?

September 13, 2017

We had an inquiry from a customer for replacement templates for their Tensilkut I.  They couldn’t find a nameplate containing the model and serial number of the machine, so they sent us a photo instead.

Tensilkut I from the early 1960s

Tensilkut I from the early 1960s

Judging from the color and the lack of a stainless steel top plate, this machine was built in the early 1960s.  A corner is missing, the phenolic plate is broken on one corner, yet the machine still works well.  There is at least one other unit of this vintage still in everyday use.  After 50 plus years, that’s pretty good.

And, yes, we were able to supply templates to this customer.

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.

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.

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.