1211K KOYO 55x100x21mm Basic static load rating (C0) 10.0 kN Self aligning ball bearings
| Bearing number | 1211K |
| Size (mm) | 55x100x21 |
| Brand | KOYO |
| Bore Diameter (mm) | 55 |
| Outer Diameter (mm) | 100 |
| Width (mm) | 21 |
| d | 55 mm |
| D | 100 mm |
| B | 21 mm |
| C | 21 mm |
| r min. | 1.5 mm |
| da min. | 63 mm |
| Da max. | 92 mm |
| ra max. | 1.5 mm |
| Weight | 0.693 Kg |
| Basic dynamic load rating (C) | 26.8 kN |
| Basic static load rating (C0) | 10.0 kN |
| (Grease) Lubrication Speed | 5800 r/min |
| (Oil) Lubrication Speed | 7100 r/min |
| Calculation factor (e) | 0.20 |
| Calculation factor (Y0) | 3.34 |
| Calculation factor (Y1) | 3.19 |
| Category | Self Aligning Ball Bearings |
| BDI Inventory | 0.0 |
| Manufacturer Name | KOYO |
| Minimum Buy Quantity | N/A |
| Weight / Kilogram | 0.749 |
| EAN | 0060579000115 |
| Product Group – BDI | B00152 |
| Mounting Method | Tapered Adapter |
| Enclosure | Open |
| Rolling Element | Ball Bearing |
| Adapter Sleeve | H-211X |
| Cage Material | Steel |
| Precision Class | ABEC 1 | ISO P0 |
| Internal Clearance | C0-Medium |
| Number of Rows of Balls | Double Row |
| Other Features | Allowable Misalignment 2.5 Deg | 1:12 Taper |
| Long Description | 55MM Bore; Tapered Adapter Mount; 100MM Outside Diameter; 21MM Inner Race Width; 21MM Outer Race Width; Open; Steel Cage; Double Row of Balls; ABEC 1 | ISO P0; C0-Medium |
| Inch – Metric | Metric |
| Category – BDI | Self Aligning Ball Bearings |
| UNSPSC | 31171532 |
| Harmonized Tariff Code | 8482.10.50.68 |
| Noun | Bearing |
| Keyword String | Self Aligning |
| Manufacturer URL | http://www.koyousa.com |
| Manufacturer Item Number | 1211K |
| Weight / LBS | 1.5278 |
| Bore | 2.165 Inch | 55 Millimeter |
| Outside Diameter | 3.937 Inch | 100 Millimeter |
| Inner Race Width | 0.827 Inch | 21 Millimeter |
| Outer Race Width | 0.827 Inch | 21 Millimeter |
Detailed Parameters
parameter：
| NU 1012 ML Thrust ball bearings | Width :18mm ，d:60 mm ，Bore Diameter :95mm ，Brand:SKF ，Size :95x60x18mm ，Outer Diameter :60mm |
| A 5324 WB Cylindrical roller bearings | Width :104.775mm ，Bore Diameter :120mm ，Size :120x260x104.775mm ，Brand:SIGMA ，d:120 mm ，Outer Diameter :260mm |
| 7215AC Angular contact ball bearings | Outer Diameter :130mm ，Size :75x130x25mm ，Width :25mm ，Brand:NACHI ，d:75 mm ，Bore Diameter :75mm |
| HI-CAP 57407/1D Tapered roller bearings | Brand:KOYO ，Outer Diameter :70mm ，Size :40x70x19mm ，Bore Diameter :40mm |
| HKS30X37X45.5ZW Needle roller bearings | Brand:NTN ，Bore Diameter :30.000mm ，Size :30x37x45.500mm ，Fw:30.000 mm ，Width :45.500mm ，Outer Diameter :37.000mm |
| 51203 Thrust ball bearings | EAN:4547359306545 ，Category:Thrust Ball Bearing ，BDI Inventory:6.0 ，Manufacturer Name:NTN ，Minimum Buy Quantity:N/A ，Weight / Kilogram:0.05 |
| 2TS2-DF0055LLBNC3 Angular contact ball bearings | Brand:NTN ，Width :16mm ，Outer Diameter :26mm ，Size :10x26x16mm ，Bore Diameter :10mm |
| F695ZZ Deep groove ball bearings | d:5 mm ，Size :5x13x4mm ，Width :4mm ，Outer Diameter :13mm ，Bore Diameter :5mm ，Brand:ISB |
| Q308 Angular contact ball bearings | Outer Diameter :90mm ，Bore Diameter :40mm ，Size :40x90x23mm ，Brand:CX |
| NUP1019 Cylindrical roller bearings | Brand:KOYO ，Outer Diameter :145mm ，Size :95x145x24mm ，Width :24mm ，Bore Diameter :95mm ，d:95 mm |
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rs min 1.1 mm Radial clearance class CN Mass 2.31 kg Dynamic load, C 80 kN Static load, C0 79.5 kN Fatigue limit load, Cu 2.8 kN f0 16.2 Nlim (oil) 3.800 rpm Nlim (grease) 3.200 rpm Min operating temperature, Tmin -20 °C Max operating temperature, Tmax 120 °C Characteristic cage frequency, FTF 0.45 Hz