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Panasonic EY7202 Manual

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 
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Bolt
Møtrik
Skive
Stålplade,
tykkelse 10 mm
Skive
Fjederskive
Stramningsbetingelser
• De følgende bolte anvendes.
Standardbolte: Styrketype 6,8
Type med stor trækstyrke 12,9
Forklaring af styrketype
6,8
Boltstrækgrænse
(80% af trækstyrke
)
48
k�f/mm
2
(68.000psi)
Bolttrækstyrke 60
k�f/mm
2
(85.000psi)
2) Stramningstid
Længere stramningstid resulterer i et højere
stramningsmoment. Overdreven stramning
er imidlertid ikke tjenligt og forkorter værktø
-
jets levetid.
3) Forskellig boltdiameter
Størrelsen af boltdiameteren påvirker
stramningsmomentet.
Almindeligvis stiger stramningsmomentet,
når boltdiameteren bliver større.
4) Stramningsbetingelser
Stramningsmomentet vil være forskelligt,
selv med den samme bolt, alt efter klassifi
-
kation, længde og momentkoefficient (den
faste koefficient angives af fabrikanten ved
fremstillingen).
Stramningsmomentet vil være forskelligt,
selv med det samme boltningsmateriale
(dvs. stål), alt efter overfladebeskaffenheden.
Momentet reduceres drastisk, når bolten og
møtrikken begynder at rotere sammen.
5) Borepatrons spillerum
Drejningsmomentet mindskes, så snart en
sekskant-konfiguration af en borepatron med
forkert størrelse anvendes til at stramme en bolt.
6) Omskifter (Kontroludløser for variabel hastig-
hed)
Drejningsmomentet mindskes, hvis appara
-
tet anvendes med en omskifter, som ikke er
trukket helt ud.
7) Virkning af tilslutningsadapteren
Stramningsmomentet vil blive mindsket via
anvendelse af et universalled eller en tilslut
-
ningsadapter.
VII
. TILBEHØR
Anvend kun bits, som passer til størrelsen af
borpatronen.
… 72 …


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