/ Self aligning ball bearings

2311 k bearing

1.Product Introduction: The double-row heavy-duty model of self-aligning ball bearings (2311K), with an inner diameter of 55mm and a tapered hole (1:12), featuring double-row steel balls and a steel cage, suitable for heavy-duty equipment.
2.Structure Type: Inner ring (with tapered hole 1:12) + outer ring (with thick-wall spherical raceway) + double-row steel balls + steel cage, open type (equipped with a grease filling port).
3.Size Range: Inner diameter: 55mm (tapered hole 1:12), outer diameter: 120mm, width: 43mm.
4.Material: Inner ring / outer ring: GCr15, rolling elements (steel balls): GCr15, cage: steel (heavy-duty resistant).
5.Accuracy: Conventional P0 grade, heavy-duty precision models are of P6 grade.
6.Application Fields: Heavy-duty motors (11kW), mining machinery (small conveyors), auxiliary axes of construction machinery (rollers), large water pumps (7.5kW).
7.Key Inspection Items: Consistency of double-row steel balls, accuracy of the tapered hole, radial load-bearing capacity (≥ 50kN), hardness of the outer ring raceway (HRC58 - 62).

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Product Description

DATA SHEET

2311 K Bearing: High-Temperature Resistant (150°C), Heavy-Load Solution for Metallurgical Machinery

When your machinery operates in extreme conditions—like scorching furnace environments or heavy-load conveyor systems—you need a bearing that won't buckle under pressure. The 2311 K bearing is engineered precisely for these challenges. With a tapered hole design (1:12), double-row steel balls, and a robust steel cage, this bearing delivers unmatched durability in high-temperature (up to 150°C) and heavy-load scenarios. Whether you're retrofitting legacy equipment or optimizing new installations, the product ensures reliable performance where standard bearings fail.

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Why Choose Us?

Built for Extreme Environments

150°C Continuous Operation: Specialized heat treatment and high-purity GCr15 steel enable stable performance in metallurgical furnaces and rolling mills.
380 kN Dynamic Load Capacity: Handles heavy axial/radial loads in mining conveyors, construction rollers, and large water pumps.
40% Lower Friction: Pre-lubricated with high-temperature grease to reduce wear under intense stress.

Precision Engineering

P5 Precision Grade: Reduces vibration (noise <35dB) for smoother operation in medical or high-speed applications.
Interchangeable Design: Matches ISO 15:1998 standards for seamless upgrades without equipment modifications.

Proven Longevity

2x Lifespan: Precision-ground raceways and ceramic-coated cages (optional) resist abrasive dust and slag particles.
72-Hour Endurance Testing: Validated for 12+ months of continuous use in harsh environments.

Technical Specifications

Parameter	Value
Inner Diameter	55 mm (Tapered 1:12)
Outer Diameter	120 mm
Width	43 mm
Temperature Range	-50°C to +150°C
Dynamic Load	380 kN
Material	GCr15 Steel (HRC 58-62)

Where It Excels

Critical Applications

Rolling Mill Roll Necks: Withstands 200kN+ radial loads at 400°C.
Furnace Conveyors: Ceramic-coated variants resist slag corrosion.
Continuous Casting Machines: Modular designs fit legacy equipment.

Customization Options

Need a tailored solution? We adapt the 2311 K bearing to your specs:

Non-Standard Sizes: Modify inner/outer diameters (±10%) or width.
Enhanced Protection: Add labyrinth seals for dusty/steam-rich areas.
Smart Monitoring: Integrate IoT sensors for real-time vibration/temperature tracking.

Faster Delivery, Fewer Downtimes

48-Hour Shipping: Standard bearings stocked in EU (Germany), NA (Texas), and SEA (Singapore) warehouses.
20-Day Custom Orders: Modular production cuts lead times by 30% vs. industry averages.

Quality You Can Trust

Triple QC Checks: Ultrasonic flaw detection, hardness tests (HRC 60-64), and 72-hour stress trials.
Certifications: ISO 9001, CE, and ATEX-compliant for explosive environments.

FAQs

1. Can the product handle sudden impact loads in rolling mills?

Yes! Its double-row steel balls and reinforced cage absorb 50J+ impact energy at 200°C.

2. Do you provide installation support for legacy equipment?

Our engineers offer free on-site mapping and CAD blueprints for retrofits.

3. What lubricants work best for high-temperature applications?

We recommend ISO VG 460 synthetic grease for operations above 300°C.

4. How do I verify bearing dimensions before ordering?

Download our 3D CAD model or request a sample for fit checks.

5. What's the MOQ for expedited delivery?

50 units for standard 48-hour shipping.

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Contact Us

Upgrade to Reliability

Don't let bearing failures disrupt your operations. The 2311 k bearing combines decades of metallurgical expertise with cutting-edge engineering—ensuring your machinery runs longer, smoother, and hotter.

📩 Contact Our Engineers Today

Email: sales@inno-bearing.com

d 17~45mm
Overall Dimensions				Rated Load		Limiting Rotational Speed		Bearing Designation				Mounting Dimensions			Calculation Coefficient				Weight
Overall Dimensions				Rated Load		Limiting Rotational Speed		Cylindrical Bore	Tapered Bore	Cylindrical Bore	Tapered Bore	damin	Damax	ramax	e	Y1	Y2	Y0
d	D	B	rmin	Dynamic Load C	Static Load C。	Grease	Oil	Current Model		Original Model		damin	Damax	ramax	e	Y1	Y2	Y0
mm				kN		r/min						mm							kg
17	40	12	0.6	8.67	2.45	13500	16200	1203	1203K	1203	111203	21	36	0.6	0.31	2	3.1	2.2	0.076
20	47	14	1	12.4	3.2	13500	16200	1204	1204K	1204	111204	25	42	1	0.27	2.3	3.6	2.4	0.119
20	52	21	1.1	18.2	4.75	10000	13000	2304	2304K	1604	111604	26.5	45.5	1	0.51	1.2	1.9	1.3	0.219
25	52	15	1	14	4.05	11700	14400	1205	1205K	1205	111205	30	47	1	0.27	2.3	3.6	2.4	0.144
	52	18	1	16.5	4.28	11700	14400	2205	2205K	1505	111505	30	47	1	0.41	1.5	2.3	1.5	0.187
	62	17	1.1	18.6	6	8500	11000	1305	1305K	1305	111305	31.5	55.5	1	0.27	2.3	3.5	2.4	0.258
	62	24	1.1	26.5	6.95	8500	11000	2305	2305K	1605	111605	31.5	55.5	1	0.47	1.3	2.1	1.4	0.354
30	62	16	1	15.6	5.85	9000	11700	1206	1206K	1206	111206	35	57	1	0	3	4	2.7	0.227
	62	16	1	15.6	5.85	9000	11701	1206TNI				35	57	1	0.24	2.6	4	2.7	0.224
	62	20	1	23.3	5.68	9500	11700	2206	2206K	1506	111506	35	57	1	0.39	1.6	2.4	1.7	0.26
	72	19	1.1	22.1	7.8	8100	10000	1306	1306K	1306	111306	36.5	65.5	1	0.34	2.4	3.8	2.6	0.39
35	72	17	1.1	18.6	6.7	8100	10000	1207	1207K	1207	11207	42	66	1	0	3	4	2.9	0.347
	72	23	1.1	30.1	8.6	8100	10000	2207	2207K	1507	111507	41.5	655	1	0.38	1.7	2.6	1.8	0.441
	80	21	1.5	26	9.8	6800	8100	1307	1307K	1307	111307	43	72	1.5	0.25	2.6	4	2.7	0.538
	80	31	1.5	39.7	12.9	6800	8100	2307	2307K	1607	111607	43	72	1.5	0.46	1.4	2.1	1.4	0.675
40	80	18	1.1	19.5	8.65	6800	8100	1208	1208K	1208	11208	47	74	1	0	3	4	3	0.419
	80	23	1.1	31.2	9.8	6800	8100	2208	2208K	1508	111508	46.5	73.5	1	0.34	1.9	2.9	2	0.53
	90	23	1.5	33.1	12.2	6000	7200	1308	1308K	1308	111308	48	82	1.5	0.24	2.6	4	2.7	0.711
	90	33	1.5	52.9	15.6	6000	7200	2308	2308K	1608	111608	48	82	1.5	0.43	1.5	2.3	1.5	0.93
45	85	19	1.1	22.4	9.65	6000	7200	1209	1209K	1209	111209	51.5	78.5	1	0.21	2.9	4.6	3.1	0.493
	85	23	1.1	31.9	10.8	6000	7200	2209	2209K	1509	11509	51.5	78.5	1	0.31	2.1	3.2	2.2	0.553
	100	25	1.5	38.2	16	5700	6800	1309	1309K	1309	11309	53	92	1.5	0.25	2.5	3.9	2.6	0.951
	100	36	1.5	62.4	19.6	5700	6800	2309	2309K	1609	111609	53	92	1.5	0.42	1.5	2.3	1.6	1.25
d 50～750mm
Overall Dimensions				Rated Load		Limiting Rotational Speed		Bearing Designation				Mounting Dimensions			Calculation Coefficient				Weight
Overall Dimensions				Rated Load		Limiting Rotational Speed		Cylindrical Bore	Tapered Bore	Cylindrical Bore	Tapered Bore	damin	Damax	ramax	e	Y1	Y2	Y0
d	D	B	rmin	Dynamic Load C	Static Load C。	Grease	Oil	Current Model		Original Model		damin	Damax	ramax	e	Y1	Y2	Y0
mm				kN		r/min						mm							kg
50	90	20	1.1	26	10.8	6300	7700	1210	1210K	1210	111240	56.5	83.5	1	0.2	3.1	4.8	3.3	0.545
	90	23	1.1	33.1	11.2	6300	7700	2210	2210K	1510	111510	56.5	83.5	1	0.29	2.2	3.4	2.3	0.678
	110	27	2	43.6	17.6	5000	6000	1310	1310K	1310	111310	59	101	2	0.24	2.7	4.1	2.8	121
	110	40	2	63.7	20	5000	6000	2310	2310K	1610	111610	59	101	2	0.43	1.5	2.3	1.6	1.66
55	100	21	1.5	27	13.4	5000	6000	1211	1211K	1211	111211	63	92	1.5	0.2	3.2	5	3.4	0.704
	120	29	2	51.4	22.4	4500	5400	1311	1311K	1311	111211	64	111	2	0.23	2.7	4.2	2.8	1.58
	120	43	2	76.1	24	4500	5400	2311	2311K	1611	111611	64	111	2	0.41	1.5	2.4	1.6	2.09
60	110	22	1.5	30.2	15.6	5000	6000	1212	1212K	1212	111212	68	102	1.5	0.19	3.4	5.3	3.6	0.896
	110	28	1.5	47.8	16.8	5000	6000	2212	2212K	1512	111512	68	102	1.5	0.28	2.3	3.5	2.4	1.15
	130	31	2.1	57.2	26.5	4050	5000	1312	1312K	1312	111312	71	119	2	0.23	2.8	4.3	2.9	1.96
	130	46	2.1	87.1	28.5	4050	5000	2312	2312K	1612	111612	71	119	2	0.41	1.6	2.5	1.6	2.58
65	140	33	2.1	63.7	29	3870	4500	1313	1313K	1313	111313	76	129	2	0.23	2.8	4.3	2.9	2.38
70	150	35	2.1	74.1	27.5	3600	4320	1314	1314K	1314	111314	81	139	2	0.22	2.8	4.4	2.9	2.98
75	160	37	2.1	79.3	30	3400	4300	1315	1315K	1315	111315	86	149	2	0.22	2.8	4.4	3	3.55
75	160	55	2.1	124	43	3400	4300	2315	2315K	1615	111615	86	149	2	0.38	1.7	2.6	1.7	4.71
80	170	39	2.1	88.4	33.5	3200	4100	1316	1316	1316	111316	91	159	2	0.22	2.9	4.5	3.1	4.17
85	180	41	3	97.9	38	3100	3600	1317	1317	1317	111317	98	167	2.5	0.22	2.9	4.5	3	4.95
750	920	78	5	276	307	260	340	118/750	118/750K	118/750	11118/750	761	909	4	0.059	10.6	16.4	11.1	116