Koyo Bearings NA4920 - Solid Race Bearing W/ Inner Ring , 100 mm ID, 140 mm OD, 40 mm Width, MFR ID KOY-NA4920
- MFR #NA4920
- EIS #NA492008
- UPC #605790196416
$603.19 / Piece
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NA4920 - Needle Roller Bearing, Solid Race Bearings
Features
- Best used for high radial load applications
- Made from premium high carbon, high chromium Japanese steel
- Available with no inner ring (NK, NKS, RNAO, RNA2200, RNA48, RNA49 series)
- Available with inner ring (NA48, NA49, NA69, NAO, NKJ, NKJS series)
- Available as a double row with inner ring (NA69 series)
- Available as a double row without inner ring (RNA69 series)
- A steel cage is standard, .TN calls out a polymer cage
- Available with two seals (.2RS) in the RNA4900, RNA 2200 and NA4900 series
- "HJ" calls out the inch series
General Information
| Item Name | Needle Roller Bearings |
| Series | NA4900 |
General Features
| Net Weight | 4.45 lb |
Design & Construction
| Bore Type | Round |
| Cage Material | Steel |
| Cage Type | Riveted |
| Closure Type | Open |
| Lubrication Type | Rust Preventative |
| Material | High Carbon Chrome Steel |
| Relubrication Feature | No |
| Rolling Element | Needle Roller |
| Rolling Element Material | 52100 |
| Row Type | Single row |
Performance Details
| Dynamic Load Capacity | 139 kn |
| Operating Temperature | -30 to 110 °C |
| Precision Class | ABEC 1 |
| Self Aligning | No |
| Speed Rating | 2400 rpm (Grease) | 3700 rpm (Oil) |
| Static Load Capacity | 296 kn |
Physical Properties
| Bore Diameter | 100 mm |
| Fillet Radius | 0.043 Inch |
| Outside Diameter | 140 mm |
| Outside Width | 1.575 Inch |
| Overall Width | 40 mm |
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