Table of Contents
Advertisement
2 Improved dust resistance
The dust-resistant contact seal bearings are provided at the commutator side and the fan side. Thanks to the
new bearings, hermeticity is enhanced because the seals of the bearings always contact the inner rings (C:
non-contact bearings). The labyrinth construction is provided between the housing and the fan at the pinion
side as shown in the figure below to ensure protection against dust because the pinion side must have high
durability against heavy loads. The air inlet is minimized and the powerful fan discharges dust if entered.
Seal
Dust resistance is improved
thanks to the contact seal
bearings.
3 Improved service life and durability
Although the service life may vary depending on the frequency of use and the severity, the service life of the
Models WH 12DM/WR 12DM is 1.5 times longer than C in spite of the compact body because the Models
WH 12DM/WR 12DM have strong components such as the highly durable motor and the gears made of
specially heat-treated steel to realize powerful operation.
--- 6 ---
Labyrinth
The labyrinth
construction ensures
protection against dust.
Advertisement
Table of Contents
