What type of rod radial end bearing needs maintenance?

The rod radial end bearing with a steel/steel or steel/copper sliding contact surface combination requires maintenance.

The steel/steel rod radial end bearing consists of a rod end seat and a standard steel/steel radial spherical sliding bearing, in which the outer ring is fixed on the bearing seat. These rod ends can be equipped with:

Female thread or male thread rod radial end bearing

Female thread with grooved shank (special series for hydraulic cylinder)

Welded shank with cylindrical or rectangular section

Steel/copper rod radial end bearing is equipped with female thread or male thread.
It includes a rod end joint bearing seat and a steel/copper spherical plain bearing. The inner ring of these bearings is made of steel and the outer ring is made of copper. Fix the bearing in place by riveting the bearing seat on both sides of the outer ring. These rod ends are equipped with male or female threads.

Supplementary lubrication device for rod radial end bearing
The rod radial end bearing requiring maintenance is equipped with a grease nipple or lubrication hole in the rod end joint bearing seat. It can also be relubricated via pins. Exceptions include steel/steel rod ends in the SA .. E and SI .. E series and some small rod ends shown in the product tables.

rod radial end bearing size standard
SA(A) series: ISO 12240-4:1998 dimension series E, EH
SI(A) series: ISO 12240-4:1998 dimension series E, EH
SC series: ISO 12240-4:1998 dimension series E
SCF series: –
SIJ series: ISO 8133:2006
SIR series: –
SIQG series: ISO 8132:2006
SAKAC series: ISO 12240-4:1998 dimension series K
SIKAC series: ISO 12240-4:1998 dimension series K
SIKAC/VZ019 series: ISO 8139:2009, ISO 12240-4:1998

Male thread and female thread rod radial end bearing:
Rod radial end bearing without suffix VZ019: ISO 965-1:1998
Rod radial end bearing with suffix VZ019: ISO 8139:2009
Tolerance Inner ring: ISO 12240-4:1998
Radial internal clearance ISO 12240-4:1998
Material: monolithic steel/steel rod radial end bearing: The inner ring and outer ring are made of hardened, ground and phosphated bearing steel; the sliding contact surface is treated with a running-in lubricant

RS seal: polyester elastomer or nitrile rubber

Integral steel/copper rod radial end bearing: The outer ring is made of copper, and the inner ring is made of hardened and ground bearing steel

Rod end joint bearing seat
Allowable operating temperature range: Depends on rod end joint bearing housing, bearings, bearing seals and grease

After the temperature exceeds 100 °C (210 °F), the load carrying capacity of the rod end seat will decrease. When the temperature is below 0 °C (30 °F), check to make sure that the fracture toughness of the rod end joint bearing seat is suitable for the application to be used. At the same time, the allowable operating temperature range of the grease must be considered.

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