For many years, DZE has made a decisive contribution to the development and current level of rolling bearing technology, particularly through its compact needle roller bearings, high load capacity cylindrical roller bearings and its diverse range of track rollers for rotary and linear motion.
DZE slewing rings are also known worldwide as premium products in the field of rolling bearing technology. DZE machine elements have proved themselves many times over; have high load carrying capacity, a versatile range of applications and are highly cost-effective. Due to their design, a single bearing can reliably support radial,axial and tilting moment loads. In many cases to replace bearing arrangements comprising a combination of radial and axial bearings by a single bearing. In some cases considerably, the costs and work required in the design of the adjacent construction and the fitting of bearings.
Slewing rings are sealed on both sides, lubricated with a high quality grease, can be relubricated via lubrication nipples and are particularly easy to fit. The bearing rings are supplied without gear teeth or,
in order to achieve simple drive solutions, are available with external or internal gear teeth.
DZE slewing rings are designed as:
four point contact bearings-Double sealed slewing bearing
Custom bearings slewing rings without preload are robust and proven under very demanding operation; Cross roller bearing place only slight demands on the flatness and perpendicularity of the adjacent construction
Double sealed slewing bearing are suitable for applications with low requirements for accuracy and rigidity of the bearing arrangement, for example in simple metalworking machines, wind power equipment and construction machinery
crossed roller bearings-Cross roller bearing
Preloaded slewing rings can support higher loads than four point contact bearings. DZE have proved themselves particularly where bearings are subjected to high radial forces and moderate axial and tilting moment loads
– DZE Cross roller bearing are suitable for applications with uniform running free from stick-slip, low rotational resistance and high requirements for axial and radial runout accuracy and rigidity, for example in robots, handling systems and machine tools.
Sealing of the bearing arrangement
DZE seal profiles for Double sealed slewing bearing
DZE slewing rings are supplied sealed.
Depending on the requirement and type of contamination – e.g. heavy contamination, high humidity, spray or flood water etc.– additional sealing of the bearing position in the adjacent construction may be necessary.
DZE seal profiles
For sealing of the bearing arrangement in the adjacent construction, LYDZC supplies various seal profiles by the metre. profiles fulfil a wide variety of requirements . Installation drawings can be requested for the individual seal profiles.
The seal profiles are not suitable for applications requiring leakproof operation – or for grease lubrication. If leakage losses are unacceptable, measures such as rotary shaft seals can be applied.
Seal profile materials
The standard material for the profiles is the synthetic elastomer NBR 70. This material is characterised by:
good resistance to oils and greases
good wear resistance.
Operating temperature
INA seal profiles can be used at temperatures from –40 °C to +80 °C.
For temperatures lower or higher than this range, extreme environmental influences (e.g. ozone) or high speeds, please consult DZE.
Fitting of seal profiles
The area around the bearing seal must be designed such
that the seal profiles are not damaged during operation. Ensure that the profiles are not damaged while fitting the slewing ring.
Fit the profiles according to the following procedure:
clean the area where the seal is to be fitted.
press the seal profile carefully into the fitting space leaving an excess length of approximately 5%
– e.g. with a blunt wooden wedge
cut the profile to the exact length – ensure that the joint faces are even.
jointhegrease-freejointfacesusingacyanacrylateadhesive without displacement (Figuree.g. using Lo
complete the fitting of the profile
