BOLT HEATING PARAMETERS
Coil Diameter(mm)
Bolt Diameter
30
40
50
Up to 20mm
Up to 30mm
Up to 40mm
Notice: The diameter of the coil must minimum 10mm larger than the bolt diameter.
Heating capabilities
(Based on the 22mm bolt, room temperature 25°C )
Heating time:
Continues up to 3 minutes. (From normal temperature to
protection switch
-
off temperature)
Heating capacity reference:
Heating 4units bolts from 25°Cto 300°C
Recommend heating temperature and duration are as follows
Bolt Diameter
Φ
10
-
22mm
Φ
23
-
28mm
Φ
29
-
36mm
Φ
37
-
40mm
Temperature
300°C, 572
℉
300°C, 572
℉
300°C, 572
℉
300°C, 572
℉
Heating Time
25-30 s
30-35 s
35-45 s
45-50 s
Note:
1. Visible dark red color is around 550 °C
2. Metal surface temperature will be 50
-
60 °C lower.
3. Temperature over 550 °C may lead to annealing to the nut, directly
affect iron mechanical properties, so recommend heating temperature
is below 500°C
IRON TEMPERATURE AND COLOR REFERENCE
Temperature
Celsius
550
630
680
740
770
800
850
900
950
1000
1100
1200
1300
Color
Recommended Bolt Release Temperature Range: 300
-
500°C.
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