ARVC Logo  [SureBolt] [ Video ] [ Home ] Contact ] Contents ] [ Independent Consultant ]

See NASA quote.


Why SureBolt?

Measures tension not torque,

Patented whole echo method,

Graphs tension changes in real-time,

Instrument is built into the PC,

  13.3" Color TOUCHSCREEN
ToughBook Open & Closed

Friction varies too much, bolt to bolt,

Not fooled by friction variations,

Using lubrication still leaves large friction variations,

Avoid flange leaks,


Prove to safety you took a reliable tension reading,

Far greater reliability,

All other bolt gages are one-point bolt gages,

No more zero-crossing peak jumping,

ALL other bolt gages have problems with peak jumping,

Dramatic improvement due to a new patented DSP technique,

Proven by NASA,

Can record over a million bolt tensions with their waveforms,

Playback built in,

Excel compatible data files,

Flange bolts easily grouped together,

Critical bolts,

Verify your design,


Tension verification,


Much easier to use,

Graphical help,

On-line help,

Dynamic help,

13" Color Screen instead of 5" black & white screen,

Full keyboard instead of a few cryptic keys,

Record field notes with your tension data,

You can use long file names,

Large on-screen buttons,

Familiar WinXP/2000 operating system,

Full featured laptop - Panasonic Toughbook Model 72 computer,

1 year limited warrantee,

No need to transfer data to another machine,

No hidden information,

To sum it up, vastly easier and more reliable.

Press here for a detailed point by point comparison to all other bolt gages.

A Perfect Torque Value Still Gives You A Large Tension Error!
Over 50 web pages on torque, tension, & bolted joints.

Torque Wrench or Tension Wrench? The number one reason for bolt failures and flange leaks is improper bolt tension. Why? 

Identical bolts, when tightened to identical torque values, will vary substantially in their actual tensions (typically plus or minus 25%and not uncommonly plus or minus 50%).  Why? Because 85% of your torque is consumed by friction. Then this friction varies on EACH bolt (even the same bolt at different times).
Flange bolts' tensions easily vary 50% or more. 

Note: New ultrasonic invention cannot be fooled by friction variations. See ultrasonic video.

Friction has always been the problem.
See why NASA's Space Station engineers used the new technology called SureBoltTM.  

Press---here, to go to the main information page for bolt tension, torque, ultrasonic solutions, ..., etc.

See which section below is the best way for you to find the information you want. Each section has useful information on friction, torque wrench errors, bolt failures, bolt gage, stress, strain, yield, and flanges. Press here for the main SureBolt page. There are even outside links to the web's best bolted joint tutorial. 

A. Mechanical engineering
departments often teach their mechanical engineers to design bolted joints by calculating bolt tension, not bolt torque. Yet, mechanical engineers using stress analysis software and structural analysis software are often limited by bolt tension errors. See a FLASH animation of this new technology to measure actual bolt tension, not just bolt torque.

B. After all the mechanical engineering, structural engineering, and civil engineering classes on stress analysis calculations, why do some bolted joints fail? Here is a list of information that may be useful for a bridge designer, flange designer, torque wrench user, bolted joint designer, or engineering lab using structural analysis software, stress analysis software, or bolted joint design software. 

C. New NDT & NDE Technology Advances Bolted Joint Design. New NDT & NDE Technology Advances Bolted Joint Design. New DSP technology, PC technology, and ultrasonic technology combine to measure actual bolt tension, not just bolt torque. Nondestructive testing new technology.

D. Stress analysis software and structural analysis software packages are often limited by bolt tension errors.

E. Flanges. After all the engineering classes on flange design, why do some flanges leak?

F. Bolt & Nut Tension, not bolt & nut torque. Why do bolts fail and flanges leak? Bolt tension errors become one of the main factors.

After all the engineering classes on bolt & nut selection, why do some bolts fail? After all the American Society of ... procedures, why such errors?

DSP technique more reliably measures actual bolt tension, not just bolt torque. New patented technology.


Press---here, to go to the main information page for bolt tension, torque, ultrasonic solutions, ..., etc.


This site tries to give you some answers to bolting problems. Even an engineering lab will find this site a good resource for their students.  Remember, a torque wrench with a bolt gage, can help prevent bolt failures and flange leaks.


Visitors since 1-22-02 Hit Counter



Let us know how we can help you.

(800) 732-7832
Postal address
1022 Antelope Trail, Winter Springs, FL 32708, USA

Send your email to with questions or  comments about how we can help. Contact us here, or type in the email address shown above (Due to spam, we have replaced the text email address, with the image email address shown above).

Note: Privacy. We will NOT give your contact information to anyone.

 No more guessing as to which "one point" is the right point.


The FIRST whole echo method (patented DSP Technique).

SureBolt picture

Built into a 
Panasonic Toughbook

Weather proof keyboard.

Visitors Since 1-22-02 Hit Counter
Last Modified: September 27, 2011