The first relubrication of the raceway and lubrication of the gear must be carried out immediately after installation. For this and each subsequent lubrication, the lubricants named in Table 13 are to be used. These raceway greases are solely KP 2 K greases, i.e. lithiumsaponified mineral oils of NLGI Grade 2 with EP additives. The raceway lubricants listed in Table 13 can be mixed together.

The grease filling is there to reduce friction, seal the bearing and provide protection against corrosion. Therefore, the bearing must always be greased liberally so that a collar of fresh grease forms around the whole circumference of the bearing gaps and seals. The bearing should be rotated during relubrication.

Use a spattle to remove excessive grease which might egress (grease collar is to remain unchanged) and dispose it as prescribed. Carefully remove lubricants dripping down in areas in which persons may stay so as to avoid the risk that they might skid.





Table 13: Lubricants
The lubricants are listed in random order and not according to quality.

		Aralub HLP 2	243 K to 393 K (-30°C to +120°C)
		Aralub MKA-Z 1	263 K to 453 K (-10°C to +180°C)
		Spheerol EPL 2	253 K to 413 K (-20°C to +140°C)
		Mollub-Alloy 970/2500-1	253 K to 363 K (-20°C to +90°C)
		Multis EP 2	248 K to 393 K (-25°C to +120°C)
		Ceran AD Plus	248 K to 423 K (-25°C to +150°C)
		CENTOPLEX EP 2	253 K to 403 K (-20°C to +130°C)
		GRAFLOSCON C-SG O ultra	243 K to 473 K (-30°C to +200°C)
		Mobilux EP 2	253 K to 393 K (-20°C to +120°C)
		Mobilgear OGL 461	253 K to 393 K (-20°C to +120°C)
		Lagermeister EP 2	253 K to 403 K (-20°C to +130°C)
		Ceplattyn KG 10 HMF	263 K to 413 K (-10°C to +140°C)
		Alvania EP (LF) 2	248 K to 403 K (-25°C to +130°C)
		Malleus OGH	263 K to 473 K (-10°C to +200°C)

Queries concerning lubricants should be answered by the appropriate manufacturer. The greases listed in Table 13 are approved for our slewing bearings and tested for compatibility with the materials stipulated by us for spacers and seals.

We can examine other lubricants only for the purpose of assessing the aggressivity of a particular grease on the parts we use (spacers and seals), which are made of plastic or other synthetic materials.

When employing other lubricants, the user must therefore obtain confirmation from the lubricant manufacturer or supplier that the grease he has chosen is suitable for the intended application and that its properties are at least equivalent to those of the greases listed in our table. It must be guaranteed that the lubricant will not undergo any change in its composition and this also applies to future deliveries.

When automatic lubricating devices are used, the lubricant manufacturer must confirm pumpability.

With low temperatures special lubricants are necessary.

It is the responsibility of the maintenance personnel to ensure individual consumption rates by accurate checking of the lubricated condition of both the raceway and gear.

Lubrication period for the raceway system

Select according to operating conditions. With special required parameters, consultation with Rothe Erde should be held. Generally about every 100 operating hours. Roller bearings about every 50 operating hours. Shorter lubrication periods: In the tropics, by high amounts of moisture, after dust or dirt effects, strong temperature changes, as well as continuous rotation.

For bogie bearings in rail vehicles and tram vehicles as well as bearing for wind energy, special regulations apply.

If there are standstill times between bearing installation and equipment start-up, respective maintenance procedures will be required, e.g. relubrication under rotation no later than 3 after months and every 3 months thereafter.

Before and after prolonged stoppage of the equipment, relubrication is absolutely necessary. This is especially important after a winter shutdown. When cleaning the equipment, care must be taken to prevent cleaning agents from damaging the seals or penetrating into the raceways. The seals must be checked every 6 months.

Lubrication intervals for the gear

We recommend automatic gear lubrication. In case of hand lubrication, pinion and gear are to be greased sufficiently with grease recommended in Table 13. A weekly gear lubrication is recommended. The gear should always have sufficient grease.

Examination of bolts

The bolt connection has to keep a sufficient preload during the whole bearing life. For compensation of settlement phenomena a refastening on regular base may be necessary.

Checking of the raceway system

In their delivered condition large-diameter anti-friction bearings have clearances which guarantee good operating conditions and functional safety. When the bearing is put into operation, we recommend to perform a base measurement. After a prolonged operating time, bearing clearances will increase. It is, therefore, necessary to check the axial movement or settling at regular intervals (see Wear measurement or contact Rothe Erde for further information).

Disposal at end of useful life

Bearing to be dismantled, grease, seals and plastic parts to be disposed of in accordance with waste guidelines. Bearing rings and rolling elements to be conveyed to material recycling.