Torque Measuring System

Torque Measuring System
Thread tightening testing machine BTT1220
OutlineTorque Measuring Equipment

This testing machine measures thetightening torque during thread tightening,
axial tension, and the torque on the threadpart to analyze the features of tightening
from various aspects.
Speciﬁcations
1．
Applicable bolt and nut sizes
The applicable hexagonal bolt and hexagonal nut sizes
for this machine are shown in Table 1.

Screw size

M8

M10

M12

Width across ﬂat on hexagonal part［mm］

131719Min. tightening length［mm］

232833Max. bolt length below head
［mm］

86

90v94

Max. bolt overall length
［mm］

120

The tightening length is set by the thickness of the spacer provided.
Ex.: In case of M10Because the minimum tightening length is 23mm, by inserting a 10mm spacer the total tightening length would becomes 33mm.

2．
Contents of measurement

3．
Calibration

Table 2. Shows the measurement contents.
A torque strain gauge type converter measures the total
torque value, threaded portion torque and axial tensionof Table 2, while the rotation angle is measured with anencoder. The converters for measuring the axial tension
and the thread portion torque are based on a common
structure of the strain generating part.

Calibration is not possible while the converters are installedin the thread tightening tester.Take out the total torqueconverter and axial tension/screw torque converter fromthe machine and calibrate using each converter separately.
As the rotation angle and rotation speed for the tightening
drive are obtained by counting the pulses from theencoder, calibration of the rotation angle and rotation
speed is not possible.

Table 2 Measurement contents of BTT1220
Measurement range²）

Item

Permissible overloadof converter(1) All torque
Torque4．
Tightening drive unit
Table 3 shows the setting conditions of the drive part ofthe tester.

Max. 200N・m (CW, CCW)
(2) Threaded portion torque

120％ FS

Table 3 Condition of driving partMax. 150N・m（CW，CCW）
Axialtension

Max,1080°
Rotationangle (CW, CCW, 3 rotations of output shaft)

404

Rotation speed setting [rpm]Max,150kN

Tightness loosening speed
during the test
ー2〜20

Manual inching speed

TOHNICHI TORQUE HANDBOOK Vol.8

Torque Measuring EquipmentFinal drive preload automatic adjustment machine
OutlineTorque Meter

Torque Gauge

This adjustment machine ﬁxes the companion ﬂange of the medium sized pinion ﬁnal assembly in the work ﬁxture,
tightens the lock nut at the same time, and detects the preload torque. When the set preload torque value ortightening torque value is reached, the machine automatically stops the lock nut tightening, rotates the work, veriﬁes
the change of preload torque, and respectively judges whether the preload torque value and tightening torque value
is OK or NG. During veriﬁcation, if the preload torque value is judged as LO-NG, the machine automatically tightens
the lock nut one more time and carries out the above operation.

Composition

Torque Measuring System

Calibration Kit

Torque Sensor

1）Electric Nutrunner
2）Power supply
3）Power part with torque sensor
4）Sensor for preload measurement
5）Torque display unit
6）Control panel7）Operation panel8）Area sensor part9）Work set ﬁxture10）Stand part

ATGE-G
BTGE-G
ATG/BTG（-S）
TME2
TM5TM
TCF
TCR

Torque Measuring System405