The T-Giro Wrench allows for accurate measurement of parameters in bolted joints that were previously difficult to measure, such as residual clamp load and torque. It uses patented torsion angle measurement technology to determine assembling and residual clamp loads without needing bolt grinding or load cells. The software can analyze torque and angle data from other tightening tools to determine values like residual torque, clamp load loss, and relaxation over time. The T-Giro Wrench provides non-destructive testing of actual joints and faster results than ultrasonic methods that require sample preparation and take days to complete.

1. T-Giro Wrench

2. Already using the TGIRO Technology:

3. What’s TGIRO purpose as compared to
OEM Standards i.e.: FST-10?
The TGIRO purpose is to facilitate and allow the control of previously hard to
measure assembling parameters on a bolted joint. I.e.: Residual Clamp Load,
Accurate Residual Torques and joint relaxation.
Used to determine an appropriate
assembly torque specification.
Used to check residual & assembling clamp-loads
AFTER assembling process is performed and can
also be used determine the appropriate torque
spec.

4. Accurate Measurement of Preload loss
Patented Technology using torsion angle measurements to
determine: Assembling & Residual Clamp-loads.

5. NO NEED FOR:
BOLT GRINDING/ LOAD-CELLS/ STRAIN GAUGES
Clamp-load Measurement Made Easy!

6. Preload loss by relaxation under static conditions
Assembling pre-loads will drop with time due
to joint-relaxation.
Utilizing conventional technologies to
measure Residual Torques and estimate joint
relaxation can be dangerous and it is
conceptually inadequate due to:
• Differences on points of reading;
• Static x Dynamic friction coefficients;
• Different accuracy between Assembling &
Testing tool.
FV=FM-FZ

7. TORQUE AUDIT BY RE-TIGHTENING WITH A TORQUE WRENCH
WITHOUT RECORDING TORQUE & ANGLE RESULTS IN:
MISTAKEN VALUES, INACCURATE METHOD TO CHECK RESIDUAL
TORQUE AND LOSSES
Preload loss by relaxation under static conditions

8. The TGiro Method – Retighten Curve
TORSION
ANGLE
DISPLACEMENT ANGLE
RESIDUAL
TORQUE

9. RESIDUAL CLAMP LOAD
Re-tightening curve
NUT FACTOR (K)
THREAD FRICTION COEFFICIENT
ASSEMBLING CLAMP LOAD
JOINT RELAXATION
ACCURATE RESIDUAL TORQUE
TOTAL FRICTION COEFFICIENT

10. THE SOFTWARE CAN HANDLE DATA FROM ANY OTHER
TIGHTENING TOOL CAPABLE OF PROVIDING TORQUE &
ANGLE DATA. PRECISION WILL DEPEND ON ANGLE
RESOLUTION.

11. ORIGINAL DATA SET
DATA FILTERED AND
INTERPRETED BY SOFTWARE

12. PARAMETER TGIRO MC900
Drive Torque N.A.
Snug Torque N.A.
Yield Torque N.A.
Ultimate Torque N.A.
Tightening Angle N.A.
Residual Torque N.A.
Residual Clamp Load N.A.
Assembly Preload N.A.
Torque Loss N.A.
Clamp Load Loss N.A.
K Factor N.A.
Total Friction Coeff. N.A.
TGIRO Benefits x MC900 Ultrasonic Measurement

13. Feature TGIRO MC900(Ultrasonic)
Mobility to get tightening or
retightening curves on actual
application
Access to actual joint in the vehicle or
any other joint.
Not suitable for clamp load measurement in the
assembling line
Specimen preparation time &
cost
None. Just find the right socket and
go!
Expensive and time consuming due to fine
Machining/grinding and calibration needed.
Identify assembly problems Torque vs. Angle curve N.A.
Joint Integrity Non-destructive Changes original joint features if made in lab
Samples
FST-10 samples from same Lot can be
used
New samples prepared for ultrasonic measurement
Assembly Clamp Load Directly on the pre-assembled joint. Uses
algorithm and accurate measurements
combined.
Need to measure before and after. 2 steps to determine
pre-load loss.Residual Clamp Load
Residual Torque
Measures actual torque eliminating the
influence of sockets and other static
friction effects.
No torque information
Testing time & data analysis
Fast results ~ 15 min between
preparation and test results
Several days between preparing samples, grinding,
calibrating, assembling, measurement 1, waiting time,
measurement 2 and results…
TGIRO Benefits x MC900 Ultrasonic Measurement

14. Thank You !
Visit our webpage at: www.pcltork.com or contact us directly at 850, W. University Dr. Suite B Rochester – MI 48307
Phone: +1.248.761.2884 or e-mail us @ info@pcltork.com
BECAUSE CLAMP-LOAD REALLY MATTERS!