IEMCA SIR 52 P, Manual For Use And Maintenance

Page: 23 / 174

2 - TECHNICAL INFORMATION SIR-52-P/F
EN
2 - Pag. 15 / 16
2.6.1 Noise levels
The bar feeder does not cause acoustic noise.
Noise occurs when lathe, to which the bar feeder is connected, is running and the bar turns into
the bar feeder guide channels.
In such a situation, the noise level emitted depends on the following conditions:
- perfect alignment and levelling of the lathe-bar feeder unit;
- correct fastening of the lathe and bar feeder to the ground;
- perfect working order of the lathe bar gripping device;
- use of guide channels and bar pushers whose dimensions are suitable to the diameter of the
bar to be machined;
- use of a front guiding bush of suitable diameter (if supplied);
- use of bars whose straightness is within the prescribed limits (max. deflection in mm equal
to 0.5 per thousand of the bar length);
- use of a spindle liner with a diameter equal to the bar feeder guide channel diameter;
- spindle rotation speed suitable to the material to be machined;
- as far as the bar feeder is concerned, use of suitable oil, according to the diameter of the
bar to be machined;
- all bar feeder guards must be closed.
If the above mentioned conditions are complied with, the noise level emitted during the bar
rotation into the guide channel and measured according to the international standards, does not
exceed the following limits:
- brass and steel round bars ........................................................... within 80 dB(A)
- steel hex. bars ............................................................................ within 83 dB(A)
- brass hex. bars ........................................................................... within 85 dB(A)