Spherical Plain Bearing

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GEEM Spherical Plain Bearings

Specifications
Technical Data
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■ Specifications

Operating conditions:	Regularly lubricating required
Sliding contact surfaces:	Steel/Steel
Shaft fits tolerance:	h6 (harden shaft) or m6
Housing fits tolerance:	H7 (Small load) or M7 (heavy load)
Working Temperature:	-30℃ ~+130℃
GEEM..ES-2RS:	With seals

Description:

Radial spherical plain bearings have an inner ring with a sphere convex outside surface and an outer ring with a correspondingly sphere but concave inside surface. Their design makes them particularly suitable for bearing arrangements where alignment movements between shaft and housing have to be accommodated, or where oscillating or recurrent tilting or slewing movements must be permitted at relatively slow sliding speeds.

Radial spherical plain bearings are available with different sliding contact surface combinations, i.e. the sliding surfaces of inner and outer rings are made from different materials. There are two main groups： spherical plain bearings requiring maintenance(steel-on-steel) and maintenance-free spherical plain bearings.

Maintenance type (steel-on-steel) Radial spherical plain bearings generally have hardened sliding contact surface on both rings. The surfaces are treated with molybdenum disulphide and phosphated. It has characteristics of wear-resistance and wear-corrosion. Bearings with this sliding contact surface combination require regular re-lubrication. The high strength of the sliding contact surfaces makes these bearings especially suitable for bearing arrangements where heavy loads of alternating direction, shock loads or heavy static loads have to be accommodated.

■ Technical Data

Sliding contact surfaces： Steel / Steel

Bearing Models		Dimensions (mm)									Load Ratings (KN)		Weight (≈kg )
Bearing Models		d	D	B	C	di max	dk	rs min	ns min	a° ≈	Dynamic	Static
GEEM20ES-2RS	20		35	24	12	24	29	0.3	0.3	6	30	146	0.072
GEEM25ES-2RS	25		42	29	16	29	35.5	0.3	0.6	4	48	240	0.13
GEEM30ES-2RS	30		47	30	18	34	40.7	0.3	0.6	4	62	310	0.16
GEEM35ES-2RS	35		55	35	20	40	47	0.6	1	4	79	399	0.25
GEEM40ES-2RS	40		62	38	22	45	53	0.6	1	4	99	495	0.34
GEEM45ES-2RS	45		68	40	25	52	60	0.6	1	4	127	637	0.45
GEEM50ES-2RS	50		75	43	28	57	66	0.6	1	4	156	780	0.59
GEEM60ES-2RS	60		90	54	36	68	80	0.6	1	3	245	1220	1.06
GEEM70ES-2RS	70		105	65	40	78	92	0.6	1	4	313	1560	1.66
GEEM80ES-2RS	80		120	74	45	90	105	0.6	1	4	400	2000	2.47
GEEM90ES-2RS	90		130	80	50	99	115	1	1	4	488	2440	2.88
GEEM100ES-2RS	100		150	90	55	113	130	1	1	4	607	3030	4.65
GEEM120ES-2RS	120		180	108	70	133	160	1	1	4	950	4750	8.44