FLEXAULIC
Incorporating Statimeter

BOLT LOAD METER

*Power and hand tool calibration
*Bolt quality control
*Torque tension values
*Bolt tension control
*Impact wrench calibration

The Flexaulic Bolt Load Meter is a compact, robust and fully portable hydraulic instrument designed to measure the tension or clamping force generated in the shank of a tightened bolt. This enables torque spanners, impact wrenches or nut runners to be calibrated directly to give the required tension in the bolt. Torque measurement, which is an intermediate stage, may be eliminated.

This is of particular value in the Structural Steel industry. In order to implement the recommendations of BS 4604 Part 2 1970 on Friction Grip Bolting, a Bolt Load Meter fitted with a sample nut and bolt assembly is essential for the correct calibration of power and hand operated tools, and should be used at least once every shift.

Where torque recommendations are still required, a sample batch of fasteners may be tested and, by using an accurate torque spanner, an average torque for a safe bolt load can be evaluated. Bolt yield is easily discernible as the needle recording the bolt tension registers in proportion to the rotation of the nut; as soon as the bolt starts to yield, this relationship is immediately and recognisably altered.

The Load Meter can be fitted with a special hardened and ground thread Test Bolt assembly to record the power output of impact wrenches to determine when they should be withdrawn from use for servicing. This combination is also used to confirm that the power output after servicing is at an acceptable level.


Test Bolt assembly

Test Bolt assembly

 
Model
Bolt capacity
Maximum load
Average min. grip length
Approx torque range with test bolt
 
mm
in.
kN
lbf
kgf
mm
in.
Bolt size
N.m
lbf. ft
00
3-6
1/8-1/4
22
5000
2250
16
5/8
5/8
7-70
5-50
0
5-11
3/16-7/16
66
15000
7000
17
11/16
7/8
15-200
10-150
1
6-16
1/4-5/8
130
30000
14000
32
11/4
7/8
25-400
20-300
2
13-32
1/2-11/4
350
80000
36000
40
19/16
11/4
70-1400
50-1000
3
16-32
5/8-11/4
500
110000
50000
41
15/8
13/8
135-2000
100-1500

Where standard nut and bolt assemblies are to be tested, bolt bushing adapter sets are needed; one set is required for each bolt set to be tested

Note:All units weigh approx. 15 kg and are 390x200x80 mm in size. All units are scaled in kg, kN and lb as standard.

 

 

 

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