NSK Bearing 2211 2211k Double Row Self-Aligning Radial Ball Bearing

NSK Bearing 2211 Double Row Self-Aligning Radial Ball Bearing

The self-aligning ball bearing has two rows of balls and a common concave sphered raceway in the outer ring. The bearing is consequently self-aligning and insensitive to angular misalignments of the shaft relative to the housing. It is particularly suitable for applications where considerable shaft deflections or misalignment are to be expected. Additionally, the self-aligning ball bearing has the lowest friction of all rolling bearings, enabling it to run cooler even at high speeds.

We produce self-aligning ball bearings to several designs. These are

– open bearings of the basic design

– sealed bearings

– open bearings with an extended inner ring

 

This ball bearing type is recommended when the shaft’s alignment and housing are complex and may flex. The outer ring has a spherical raceway, and its center of curvature coincides with that of the bearing; therefore, the axis of the inner circle, balls, and cage can deflect to some extent around the bearing center. Pressed steel cages are usually used. Since the contact angle is slight, the axial load capacity is low. Under normal loads, the permissible dynamic misalignment is approximately 0.07 to 0.12 radian (4 to 7 degrees).

Boundary Dimension (mm)				Mass (KG)	Bearing Numbers	Basic Load Ratings(KN)		Limited Speed(rpm)
d	D	B	rain	approx		Cr	Cor	Grease	Oil
50	90	20	1.10	0.525	1210	20.43	7.78	5500	6500
	90	23	1.10	0.564	2210	20.88	8.11	5200	6100
	110	27	2.00	1.250	1310	39.15	13.54	4700	5500
	110	40	2.00	1.580	2310	58.05	19.39	4400	5100
55	100	21	1.50	0.705	1211	24.12	9.6	5000	5900
	100	25	1.50	0.746	2211	23.85	9.50	4800	5500
	120	29	2.00	1.600	1311	46.35	17.18	4300	4900
	120	43	2.00	2.030	2311	67.95	23.04	4000	4700
60	110	22	1.50	0.900	1212	27.00	11.04	4700	5500
	110	28	1.50	1.030	2212	30.60	12.10	4400	5100
	130	31	2.1	2.030	1312	51.30	19.97	3900	4600
	130	46	2.10	2.570	2312	78.30	27.07	3600	4300
65	120	23	1.50	1.150	1213	27.90	12.00	4300	5000
	120	31	1.50	1.400	2213	39.15	15.74	4000	4800
	140	33	2.10	2.540	1313	55.80	21.99	3600	4300
	140	18	2.10	3.200	1313	86.40	31.20	3400	4000
70	125	24	1.50	1.300	1214	31.05	13.25	4000	4700
	125	31	1.50	1.520	2214	39.60	16.42	3700	4400
	150	35	2.10	3.190	1314	67.05	26.59	3300	4000