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Gearboxes Series RD
The helical gearboxes Series RD feature a one-piece cast housing complete with inner support to accommodate 2 or 3
gear stages into the same casing. Manufactured to latest ISO engineering design specifications the housing is checked
by computer-aided structural analysis for deflection and stress distribution.
Significant strains caused by the effects of torque and external loads do not deflect the monolithic ribwork of the hous-
ing, which significantly improves the integrity of the sealed surfaces.
The helical gearboxes Series RD are manufactured in B3 base mounted configuration. They can be easily converted to
B5 flange mounting by fitting of the appropriate additional adaptor flange.
Single-setup machining on state-of-the-art CNC production lines, the most recent calculation techniques and process
controls give superior operational reliability, maximum output torques, high overhung and thrust load capacity, and long
working life-time.
IEC or NEMA motor are easily mounted by fitting interchangeable bolted flanges and elastic couplings.
The elastic coupling, built-in inside the gearbox body, does not affect any dimensional length increase of the gearbox.
Directive ATEX
The gearboxes VARVEL-ATEX, delivered on demand, are designed and manufactured according to Directive 94/9/CE
"ATEX" and therefore, they are qualified for installation in potentially explosive atmospheres:
Zones of Group II,
Category 2 (or 3),
Explosion hazard with gas presence (Zone 1 or 2),
Explosion hazard with combustible dust presence (Zone 21 or 22).
The units VARVEL-ATEX are identified by the additional marking
:
II 2 GD ck IP66
T
max
=135 °C
Product description
Multipurpose housing
Foot & Foot/Flange Mountings
One housing for 2- & 3-stages
Housing & Covers
Input
Aluminium die cast (5 sizes)
NEMA and IEC
Cast iron (2 sizes)
motor adapters and
Universal elastic coupling
Gearing
Oil seals
20MnCr5 alloy steel
Nitrile Butadiene Rubber -NBR
Case hardened
as
standard;
Profile ground or shaved
Viton and Silicon on request
Bearings
Output
Ball or roller types
Solid
shafts
according to sizes
imperial and metric
and technical requirements
Lubrication
Synthetic long-life oil Grade ISO VG 320
No oil plugs
In-house filling