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.

 Enter Your Bolt's Calibration Parameters Screen


Scroll down for a detailed explanation.

Back to SureBolt: A More Reliable Bolt Gage


1. What tension causes the echo to delay an extra usec? Calculate the tension required to cause the echo to delay an extra 1 microsecond. Enter this value into the "Lbs/usec" control. Or use SureBolt to measure this parameter (for this type of bolt) using a known tension. SureBolt will tell you the change in echo time. Use SureBolt's "spare" parameter to record this known tension (top middle of the next screen). Then use SureBolt's playback to plot the change in echo time (x axis) versus change to known tension (y axis). SureBolt calculates the slope of this plot. Enter this slope (Lbs/usec) on this screen.

2. Will your bolt's temperature change significantly? Some applications need to keep track of the change in temperature (depending on accuracy requirements and the change in temperature expected). SureBolt will subtract the change in echo time due to temperature if you enter this parameter. If you want to keep track of the change in temperature, enter the number of microseconds that the echo delays due to a one degree C change in temperature. An easy way to measure this is to put your bolt - with the SureBolt connected - into a bath of cold water and then a bath of hot water. Enter the temperatures (on the next screen) and record the echoes. Then use SureBolt's playback to plot the change in temperature (x axis) versus change in echo time (y axis). SureBolt calculates the slope of this plot. Enter this slope on this screen.

Next Screen   




Let us know how we can help you.

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

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 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.

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Last Modified: September 27, 2011