8
7. Overload safety device
All spur gear chain blocks PREMIUM PRO have a
standard adjustable overload safety device from 500kg
or above. This protects the device by prohibiting lifting
more than the preset friction connection in the hand
wheel permits. The overload protection is set at the
factory. By fastening or loosening the press nut pos. 49,
the pressure on the friction disc is increased or lowered.
If the desired value is reached, the nut pos. 49 is
secured by bending one or two teeth of the tooth wheel
pos. 50 into the corresponding gap in the nut.
Capacity
Max. measurement of
Min. chain link
diameter (D)
1 chain
link (t)
11 chain
links (a)
0,25 t
12,6 mm
134,9 mm
3,6 mm
0,5 t
15,8 mm
170,0 mm
4,5 mm
1 t
18,9 mm
210,9 mm
5,4 mm
1,5 t
25,2 mm
271,9 mm
7,2 mm
2 t
25,2 mm
271,9 mm
7,2 mm
3 t
31,5 mm
352,5 mm
9,0 mm
5 t
31,5 mm
352,5 mm
9,0 mm
10 t
31,5 mm
352,5 mm
9,0 mm
20 t
31,5 mm
352,5 mm
9,0 mm
Capacity
Clamp mouth opening
“G” normal – max.
0,25 t
40 – 42 mm
0,5 t
26 – 29 mm
1 t
32 – 35 mm
1,5 t
38 – 42 mm
2 t
38 – 42 mm
3 t
43 – 47 mm
5 t
48 – 53 mm
10 t
60 – 66 mm
20 t
84 – 92 mm
