5TS 400
English / USA
!Warning!
When cutting metal, a cut-off machine 
generates sparks that can ignite 
clothing. Most fabrics used in clothing 
are flammable - even flame-retardant 
fabrics will ignite at higher temperatures. 
To reduce the risk of burn injury STIHL 
recommends wearing clothing made of 
leather, wool, flame-retardant-treated 
cotton or a tightly woven, heavier cotton 
such as denim. Some flame-retardant 
synthetic fabrics are also suitable but 
others such as polyester, nylon, rayon 
and acetate can melt during a fire into a 
tar-like matter that burns into the skin. 
Check the clothing manufacturer's 
instructions. Keep clothing free of oil, 
fuel, grease and other flammable 
substances.
Always wear gloves when 
handling the cut-off 
machine. Heavy-duty, 
nonslip gloves improve 
your grip and help to 
protect your hands.
Good footing is most 
important in cut-off 
machine work.
Wear sturdy boots with 
nonslip soles. Steel-toed 
safety boots are recommended. 
!Warning!
Loose objects may be thrown toward the 
operator by the cutting tool. 
To reduce the risk of injury 
to your eyes never 
operate a cut-off machine 
unless wearing goggles or 
properly fitted safety 
glasses with adequate top 
and side protection complying with 
ANSI Z 87.1. Proper eye protection is a 
must.
Wear an approved safety hard hat to 
protect your head. Cut-off machine 
noise may damage your hearing. Always 
wear sound barriers (ear plugs or ear 
mufflers) to help protect your hearing. 
Regular users should have their hearing 
checked regularly. 
!Warning!
When wet cutting is not 
utilized, the operator 
should always wear a 
respirator approved by 
NIOSH/MSHA for the 
material being cut to 
reduce the risk of serious or fatal 
respiratory illness. For additional details 
and warnings on this subject, see 
information under "Working Conditions" 
in this instruction manual.
THE CUT-OFF MACHINE
For illustrations and definitions of the 
parts of the cut-off machine, see "Main 
parts of the machine."
!Warning!
Never modify a cut-off machine in any 
way. Only attachments supplied by 
STIHL or expressly approved by STIHL 
for use with the specific STIHL cut-off 
machine models are authorized. 
Although certain unauthorized 
attachments are useable with the STIHL 
powerhead, their use may, in fact, be 
extremely dangerous.