Schwing SP 1800-D, Original Operating Instructions

Page: 246 / 390

4.5-2
000.024.14-EN
INFORMATION
The tightening torques indicated in the
following tables are standard values. They
contain a safety factor (0.9 x MA) to avoid over-
stretching of the screw-type connection.
The values must be set precisely on the tool.
They are only valid insofar as no other values
are mentioned in the individual chapters of the
SCHWING maintenance- And repair manuals,
as well as in assembly drawings.
The tables apply to hexagonal and cylinder
screws, as well as hexagonal nuts (DIN) with
A different surface treatment.
They cannot be applied to other types (e.g.
expansion bolts).
It is also not possible to use them when means
are used which increase the friction (e.g. liquid
screw lock).
Depending on the coating and lubrication, total
friction values arise, which are important for
determining the tightening torques.
Lubrication is carried out on the thread and
rotating head or nut support. Thread and support
must be clean.
The total friction values are estimated as follows:
SURFACE COLOUR TOTAL FRICTION VALUE
µtot.
1. Phosphatised (PHO) Black 0.14
2. Yellow chromated (A2C, A3C)
Galvanised (galv.)
Yellow-gold
Shiny silver
0.14
0.14
3. Dacromet (DT320/DT500)
Geomet (GT320/GT500)
Matt silver
Matt silver
0.10
4. As 1+2 with fitting lubricant* 0.10
* e.g. copper paste or MOS2