Manufacturing types

Master rolls


Master Rolls are cylindrical brushes with helical sections having linear strip brushes mounted on a rotating shaft as brushing elements. They allow continuous brushing with the disposal of waste material

A: external diameter
D: Shank/Tube external diameter
D1: Cross-hole diameter
LU: Useful lenght
LT: Total lenght
T1, T2: Shaft/Tube end
S: Tapered section lenght
B: Tapered section diameter
N: Keyways
MAX SPEED: Maximum surface speed

Advantages of master rolls


The helical positioning of the strips is studied so that the brush always in contact with the surface to be cleaned in order to provide a continuous brushing action without clogging.
The distance between the brushing elements allows the side-shifting and the complete discharge of the residues and avoids the risk of obstruction of the brush. This solutions make Master Rolls very effective and high performing.
L’azione spazzolante risulta quindi efficace e ad alto rendimento.

Filaments can be synthetic, metallic, vegetable or mixed, according to the material to be cleaned
The choice of the Master roll depends on the application (surface to be cleaned, kind and amount of material to be removed …)


There are 2 main types of Master Rolls differentiated according to the application and to the ease of assembly/disassembly and maintenance.

Open Master Rolls (RMA), which can be “Light” (RMAL) or “Heavy” (RMAP), are manufactured from a steel shaft with turned discs. Linear strip brushes are fastened onto these discs through screw dowels. RMAP are easier to maintain and replace than any other kind of Master roll.
Closed Master Rolls (RMC) are made of linear strip brushes with support tapes welded on a steel tube. They are lighter but they require longer time for the replacement of strip brushes.

Open Master Rolls

LEGENDA

A: external diameter
D: Shank/Tube external diameter
D1: Cross-hole diameter
LU: Useful lenght
LT: Total lenght
T1, T2: Shaft/Tube end
S: Tapered section lenght
B: Tapered section diameter
N: Keyways
MAX SPEED: Maximum surface speed

Open Master Rolls costructive features

ELU (min → max)A (std)A (min-max)MAX SPEEDN° strip
mminchmminchmminchmminch
RMAP1596-1/4200 → 30007-7/8 → 118-1/830011-7/8270 → 45010-5/8 → 17-3/48 m/s - 1576 ft/min8 strip base 14
RMAL803-1/8200 → 20007-7/8 → 78-3/42007-7/8180 → 4007-1/8 → 15-3/48 m/s - 1576 ft/min8 strip base 10

Closed Master Rolls

LEGENDA

A: external diameter
D: Shank/Tube external diameter
D1: Cross-hole diameter
LU: Useful lenght
LT: Total lenght
T1, T2: Shaft/Tube end
S: Tapered section lenght
B: Tapered section diameter
N: Keyways
MAX SPEED: Maximum surface speed

Closed Master Rolls costructive features

LU (min-max)A (min → max)D (min-max)MAX SPEEDN° strip
mminchmminchmminch
RMC200 → 30007-7/8 → 118-1/8100 → 8004 → 31-1/242 → 1591-5/8 → 6-1/48 m/s - 1576 ft/minsu richista / on request

* Depending on tube diameter


Master Rolls maintenance and Strip replacement

Strip brushes can be easily removed and changed. In any kind of Master Roll the replacement is very simple and can be performed without disassembling the shaft!
In RMA strip brushes can be pulled out from the side or radially after loosening screws and dowels.
In RMC strip brushes are just pulled out of the tapes sideways. after loosening the tapes’ ends