Safety neon light: The Safety Neon light on a powertool tells you when mains power is available to the tool and is primarily a safety feature for the user.

SDS:
SDS, SDS Plus®, or SDS MAX are a system which enables easy and safe bit replacement for SDS drill bits. Note. The SDS Plus bit needs to be inserted in a specific way to ensure it locks into the chuck.

Self priming:
The engine does not have a priming bulb, itself primes the engine adds petrol to the engine as the recoil starter is pulled.

Series Circuit:
A series circuit is one which all components are connected in tandem.  The current at every point of a series circuit stays the same.  In series circuits the current remains the same but the voltage drops may vary.

Single Phase:
A single output which may be centre tapped for dual voltage levels.

Soft Start:
Soft start is a function of a motor (generally found in Angle Grinders) that provide for increased safety and control by slowly starting the motor and gently building to full speed.

Spark plug:
is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed fuels.

Spindle Lock:
A feature now seen on many cordless drills where the spindle is automatically locked when the keyless chuck is being tightened but rotates freely when driven by the gear box.

SPM:
Stroked Per Minute:  A measure of the speed of sawing action for a jigsaw or reciprocating Saw.

Surge:
A short duration high voltage condition.  May last for several cycles.

Synthetic:
A man made material.  Oils of this type typically have less wear than conventional oil.

 

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