Radial spherical plain bearings

Maintenance-free radial spherical plain bearings

Angular contact spherical plain bearings

Maintenance-free Angular contact spherical plain bearings

Spherical plain thrust bearings

Maintenance-free Spherical plain thrust bearings

Single row full complement cylindrical roller bearings

Double row full complement cylindrical roller bearings

Home > F A Q

FAQ FOR SPHERICAL PLAIN BEARING

    

Plain bearing symbol illustration

GE	H	360	X	T	-2RS
Type	Size series	Inner radius size mm	Structural style	Material style	Supplementary

Type symbol:

GE Radial joint bearing

GAC Angular contact joint bearing

GX Thrust joint bearing

 

Structure style symbol:

E Manolete outer ring

H Double half outer ring

N Outer ring with stopping groove

X Double slits outer ring

 

Material style symbol:

S Ring with lubricating groove and hole

T Sliding surface of outer ring is PTFE material

 

Supplementary symbol:

-RS One side of joint bearing with sealing

-2RS Two sides of joint bearing with sealing

-Z One side of joint bearing with dust cap

-2Z Two sides of joint bearing with dust cap

 

Mounting and dismounting

Skill and cleanliness when mounting are necessary if spherical plain bearings and rod ends are to perform correctly and not fail prematurely.

The bearings and rod ends should only be taken from their packages immediately before mounting so that they do not become contaminated. The sliding contact surfaces of the bearings are matched to provide favorable friction and wear characteristics. Any alteration of the sliding surfaces would shorten the service life so that the bearings must not be washed or come into contact with solvents, cleaners, oils or similar media. Any components which have possibly become dirty as a result of improper handling (damaged packaging etc.) should be wiped using a clean cloth.

The components associated with the bearing (housings, shafts etc.) should be cleaned and any burrs removed. They should also be checked with regard to accuracy of dimensions and form before mounting is started.

The recommendations in the following apply both to mounting and dismounting spherical plain bearings as well as rod ends.

 

Lubrication and maintenance

For spherical plain bearings requiring maintenance which are of the steel-on-steel type, the purpose of the lubrication is primarily to reduce wear, reduce friction and prevent scuffing. Also the grease serves to protect the bearings against corrosion.

During the first period of operation of steel/sinter bronze composite and steel/PTFE fabric bearings, there is a transfer of PTFE from the composite or fabric to the opposing steel surface of the inner ring. Any lubrication of the sliding contact surfaces would disturb this transfer and shorten bearing life. Therefore, lubrication of these bearings is not advisable and they have no relubrication facilities.

When greasing the bearing during mounting or before it is taken into operation, it is recommended where possible to fill the space surrounding the bearing with grease as well as the bearing itself. The frequency of relubrication of the bearing during its operation influences the length of the service life. The grease operating temperature range is –20 to +150 °C.

 

The History of HYJG self-lubricating bearing introduction

The first set domestic large self-lubricating plain bearing is produced by our company. It was provided to Wu Gang from 1998 to now. At that time Wu Gang planed to choose SKF bearing. Two sorts:GE320F and GE380FSA. As a result the time of supply is too late. Finally they decided to choose and use our products instead. Through effort of all staff, we designed and produced domestic the first batch self-lubricating joint bearing and through VAI’ affirmance.

 

The difference of material between HYJG self-lubricating plain bearing and other company’s

	material name	material thickness	life	characteristic	Using occasion	maintainability
Other Chinese companies	PTFE fabric	0.5mm	2～3year	Oil proof	metallurgy	cannot
HYJG	composite material	1.0mm 1.5mm	About10 year	Oil proof Water proof	metallurgy Water conservancy	can

 

The clearance of HYJG spherical plain bearing

Table 1: Radial internal clearance of metric steel-on-steel spherical plain bearings
Bore diameter		Radial internal clearance
d		C2		Normal		C3
over	incl.	min	max	min	max	min	max
mm		μm
Series GE,  and GEG
2.5	12	8	32	32	68	68	104
12	20	10	40	40	82	82	124
20	35	12	50	50	100	100	150
35	60	15	60	60	120	120	180
60	90	18	72	72	142	142	212
90	140	18	85	85	165	165	245
140	200	18	100	100	192	192	284
200	240	18	110	110	214	214	318
240	300	18	125	125	239	239	353
Series GEH
2.5	10	8	32	32	68	68	104
10	17	10	40	40	82	82	124
17	30	12	50	50	100	100	150
30	50	15	60	60	120	120	180
50	80	18	72	72	142	142	212
80	120	18	85	85	165	165	245

 

HYJG Spherical plain bearings are produced as standard with Normal radial internal clearance. The availability of bearings with C2 (smaller than Normal) or C3 (larger than Normal) radial internal clearance should be checked before ordering.