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MEKANIKA
DBH2
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SARRERA
Mekanismoak :
 Mugimenduak eta indarrak transmititzeko eta aldatzeko elementuak
dira.
 Gizakioi zenbait lan indar gutxiagorekin egiteko aukera ematen digu.
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1.- Palanka
Garrantzitsuena:
Definizioa
Sailkapena
Erabilera
Formula
RbPb RP •=•
b: Besoa (m)
P:Potentzia (Kg-f)
R: Erresistentzia (Kg-f)
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2.- Txirrika ( polea )
2
1
2
1
φ
φ
=
n
n
Garrantzitsuena:
Definizioa
Polea bakuna
Polipastoa
Erabilera
Formula
1: polea eragilea
2: polea eroalea
n: abiadura angeluarra (rpm)
Ø: Diametroa (mm)
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3.- Engranaiak
Garrantzitsuena:
Definizioa
Bira zentsua
Erabilera
Formula
1
2
2
1
z
z
n
n
=
1: Engranai eramalea
2: Engranai eroalea
n: abiadura angeluarra (rpm)
Z: hortz kopurua
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4.- Espeka
Garrantzitsuena:
Definizioa
Bira zentsua
Erabilera
Formula
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