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NTN 51106 is a single-direction thrust ball bearing with a 30 mm straight bore. It accommodates axial loads in one direction and is suitable for low-speed, moderate-load applications such as machine tool spindles and automotive transmissions. The bearing features a pressed steel cage and is open (unsealed).
MODEL 51106
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$38.30 Each
Prices are subject to change
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Brand Minimum Order Quantity: 2
Typically Ships in: 1 day
Returnable:No
Height
1.85
I.D.
30 mm
Length
1.85
O.D.
47 mm
Width
0.4331
Technical Specifications
| Type | Thrust Ball Bearing |
|---|---|
| Bore Type | Round |
| Outside Ring Type | Straight |
| Material | High Carbon Chrome Steel |
| Cage Type | Molded |
| Cage Material | Resin |
| Ball Material | Steel |
| Limiting Speed - Oil | 6200 RPM |
| Limiting Speed - Grease | 4300 RPM |
| Seal Type | None |
| Seal Material | None |
| Precision | ISO Class 0 |
| Configuration | One |
| Radial Internal Clearance | CN |
| Static Load Rating | 9450 lbf42000 N42.00 kN |
| Dynamic Load Rating | 4600 lbf20400 N20.40 kN |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 1.1811 in30.000 mm |
|---|---|
| D1 | 1.2598 in32.000 mm |
| d1 | 1.8504 in47.000 mm |
| D | 1.8504 in47.000 mm |
| T | 0.4331 in11.000 mm |
| r | 0.0236 in0.600 mm |
| da min | 1.5748 in40.000 mm |
| Da max | 1.5748 in40.000 mm |
| ras max | 0.0236 in0.600 mm |
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
What is the difference between deep groove and angular contact ball bearings?
Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors. Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes. If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.
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