Drums; Eccentric Frequencies; Drums Surfaces And Edges; Two Selectable Frequencies - Volvo DD25 Product Manual

Drums

Available for DD25
(005)
()
(1)
Available for DD25
(007)
()
(1)
Available for DD25
(006)
()
(2)

Eccentric frequencies

Eccentric frequencies
Volvo pioneered high frequency with the industry's first 66.7 Hz
(4000 VPM) compactor in 1975. Higher frequencies enable the operator
to travel faster while maintaining proper impact spacing.
Customer benefit
• This ability to increase travel speeds increases total machine
productivity.
• Maintaining the proper impact spacing provides a smoother quality finish
on the asphalt surface.

Drums Surfaces and Edges

Drums Surfaces and Edges
DD25 drums are machined on an industrial lathe to make them perfectly
round. In addition, each drum edge receives a special profile treatment to
help reduce pavement marking. There is a chamfer (bevel) of the outer
20 millimeters of the drum surface. There is also a 9 millimeters radius
additionally machined at the edge for rounding.
Customer benefit
• Machined drums and chamfered edges contribute to a smooth rolling
finish without marking the asphalt.
• This reduces the number of passes needed for a final quality finish.

Two selectable frequencies

Two selectable frequencies
The operator can easily change eccentric frequencies from 3300 vpm /
55 Hz to 4000 vpm / 67 Hz to match performance to production
requirements by repositioning the engines throttle lever.
Customer benefit
• Numerous application conditions from site maneuverability, mix design
and asphalt temperatures could likely cause conditions for frequency
adjustments needed for improvements in smoothness and density.
Drums 9