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Saw

Belongs to:
Tools
Synonyms:
Buzzsaw, Chainsaw, Circular saw, Disk saw, Jig saw, Power saw
Description:

A saw is an electric tool for cutting solid materials, especially wood or plastic. For that purpose, a saw blade with sawteeth at its brim is set into motion in order to create a dividing line through the removal of sawdust of the object to be cut.

In the following, different types of saws (circular saws, saws, power saws, jig saws) are presented.

A circular saw uses a rotating and toothed metal disc which is led through the material that is to be cut. These circular saws are either hand-held device or installed in workbenches.
A power saw or chainsaw is a hand-held saw that is commonly used for wood work or forestry. A saw chain runs along a guide bar which is led through wood.
A jig saw motivates a one-side-clamped saw blade in a lifting movement and allows curved cuts in diverse materials.

Due to the operation with an electromotor, alternating electric and magnetic fields can occur even in the kHz region.

Frequency ranges:
  • 50–60 Hz
Type of field:
electric and magnetic

Measurements (acc. to literature)

circular saw
Measurand Value Feature Remarks
electric field strength 533 V/m (maximum) - at the surface of the device at 50 Hz [1]
electric field strength 1.39 kV/m (maximum, measured) - at the surface of the device at 50 Hz; handheld circular saw [1]
magnetic flux density 100 µT–6 mT (maximum) - range that results from the measurement of six different devices [2]
magnetic flux density 2.11 mT (maximum) - at the surface of the device at 50 Hz; portable circular saw [3]
magnetic flux density 2.186 mT (maximum) - at the surface of the device at 50 Hz [3]
power saw
Measurand Value Feature Remarks
electric field strength 1.631 kV/m (maximum, calculated) - at the surface of the device at 50 Hz [1]
magnetic flux density 0.9–30 µT (maximum) - at a distance of 30 cm [4]
magnetic flux density 4 µT (maximum) - maximum value at a distance of 61 cm [4]
magnetic flux density 5–100 µT (maximum) - at a distance of 15 cm [4]
magnetic flux density 727 µT (maximum, calculated) - at the surface of the device at 50 Hz [3]
jig saw
Measurand Value Feature Remarks
electric field strength 4.4 kV/m (maximum, calculated) - at the surface of the device at 50 Hz [1]
magnetic flux density 1.255 mT (maximum, calculated) - at the surface of the device at 50 Hz [3]
saw (without further specification)
Measurand Value Feature Remarks
electric field strength 1.456 kV/m (maximum) - at the surface of the device at 50 Hz [1]
magnetic flux density 32.47 µT (maximum) - spatially averaged value at distances from 3 - 30 cm [5]
magnetic flux density 1.417 mT (maximum, calculated) - at the surface of the device at 50 Hz [3]

References

  1. Leitgeb N et al. (2008): Electric emissions from electrical appliances.
  2. Leitgeb N et al. (2008): Magnetic emissions of electric appliances.
  3. Leitgeb N et al. (2008): Magnetic emission ranking of electrical appliances. A comprehensive market survey.
  4. National Research Council (1997): Possible health effects of exposure to residential electric and magnetic fields.
  5. Mader DL et al. (1992): Residential exposure to 60-Hz magnetic fields from appliances.