Service and maintenance of machine
160
Verti-Mix 951-1651, Verti-Mix 951-L, 1251-L, Verti-Mix 1501 D-3101 D 05.16
9.18
Tightening torques
Regularly check the screwed connections for tightness.
Always replace screws and nuts by parts of the same quality.
Tighten counter nuts with plastic insert and bordered steel counter nuts at
approx. 50% of the “dry” value specified in the table.
Tighten gear or crown nuts at full torque.
Shear bolts are designed such that they shear off (break) at a certain stress.
Only use bolts of equal quality when replacing shear bolts.
Grade and marking of screw
heads
Grade and marking of nuts
Size
Grade 4.8
Grade 8.8
Grade 10.9
Grade 12.9
lubricated*
dry **
lubricated*
dry **
lubricated*
dry **
lubricated*
dry **
Nm lb·ft Nm lb·ft Nm lb·ft Nm lb·ft Nm lb·ft Nm lb·ft Nm lb·ft Nm lb·ft
M6
4.8
3.5
6
4.5
9
6.5
11
8.5
13
9.5
17
12
15 11.5 19 14.5
M8
12
8.5
15
11
22
16
28
20
32
24
40
30
37
28
47
35
M10
23
17
29
21
43
32
55
40
63
47
80
60
75
55
95
70
M12
40
29
50
37
75
55
95
70
110
80
140 105 130
95
165 120
M14
63
47
80
60
120
88
150 110 175 130 225 165 205 150 260 190
M16
100
73
125
92
190 140 240 175 275 200 350 255 320 240 400 300
M18
135 100 175 125 260 195 330 250 375 275 475 350 440 325 560 410
M20
190 140 240 180 375 275 475 350 530 400 675 500 625 460 800 580
M22
260 190 330 250 510 375 650 475 725 540 925 675 850 625 1075 800
M24
330 250 425 310 650 475 825 600 925 675 1150 850 1075 800 1350 1000
M27
490 360 625 450 950 700 1200 875 1350 1000 1700 1250 1600 1150 2000 1500
M30
675 490 850 625 1300 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000
M33
900 675 1150 850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750
M36
1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500
*
"Lubricated“ means that the screws are treated with a lubricant such as e.g. engine oil, or that
phosphatized or oiled screws are used.
** "Dry" means that normal or galvanized screws without any lubrication are used.
