Nachi NJ311 Cylindrical Roller Bearing - 55 mm ID, 120 mm OD, 29 mm Width
- d 55 mm
- D 120 mm
- B 29 mm
- C0 - Normal
Genuine Nachi product, Nachi
- Regular price
- $324.06
- Sale price
- $324.06
- Regular price
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Free shipping on orders over $100
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Why Apollo USA
Bearings from Apollo Industries, Oxford, Michigan
Apollo Industries supplies bearings, seals and maintenance tools to businesses across the US, with real people on the phone when you need a part matched.
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Order by 3 PM EST for same-day shipping.
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Free shipping over $100
All orders over $100 ship free by ground with code FREESHIP.
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90-day returns
Hassle-free returns on unused items within 90 days.
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Expert support
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Need tax exemption or quantity pricing?
We offer special rates for businesses and bulk orders.
Talk to a bearing specialist
2695 Lake George RdOxford, MI 48370
Overview
Nachi NJ311 Cylindrical roller bearing
Cylindrical Roller Bearing, single-direction locating design with normal clearance
The Nachi NJ311 is a medium-sized single-row cylindrical roller bearing of 55 mm bore, 120 mm outside diameter and 29 mm width, in the NJ execution. A single flange on the inner ring lets the bearing take axial load in one direction as well as heavy radial load, so it can locate a shaft against a one-way thrust while a plain floating bearing handles the other end. The rings separate for mounting. Normal CN clearance, sheet steel cage, rated -30 to +150 degrees C.
Key features
- Locates the shaft axially in one direction
- High radial load capacity from line contact
- Separable rings for straightforward mounting
- Normal CN radial internal clearance
- Pressed sheet steel cage
- Operating range -30 to +150 degrees C
Specifications
Nachi NJ311 dimensions & specifications
- Bearing type
- Cylindrical roller bearing
- Bore diameter d
- 55 mm (2.165 in)
- Outside diameter D
- 120 mm (4.724 in)
- Width B
- 29 mm (1.142 in)
- Internal clearance
- C0 - Normal
- Weight
- 3.35 lb
- Brand
- Nachi
- Part number
- NJ311
All specifications
Dimensions
| Bore Diameter | 55 mm |
| Outside Diameter | 120 mm |
| Width | 29 mm |
Properties
| Bore | Cylindrical bore |
| Cage | Sheet steel cage |
| Clearance | Normal radial clearance |
| Current insulation | No current insulation |
| Design | Support bearing (axial displacement), inner ring removable o |
| Outer ring | Without groove/lubrication holes |
| Roller rows | Single row bearing |
| Seal | None, open bearing |
| Temperature range | -30 to +150 °C |
| Tolerance class | Tolerance class P0/PN2 / ABEC 1 |
Logistics
| Product Net Weight | 1.52 |
Tools & lubrication
Complete the job for your NJ311
Mount it without damage and keep it lubricated. Tick what you need and add it with one click.
Part number decoded
What every part of NJ311 means
- NJ
- Cylindrical roller bearing, ribs on the outer ring and one on the inner ring; locates the shaft in one direction
- 3
- NU3xx cylindrical roller, medium (dimension series 03)
- 11
- Bore code 11 × 5 = 55 mm (ISO convention)
Catalogs & documents
Nachi NJ311 catalogs & documents
Official catalogs and data from the manufacturer. They open as PDFs in a new tab.
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Catalog
Nachi Ball & Roller Bearings (B2100E-4) (opens in a new tab)
PDF · English
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Catalog
Nachi Deep-groove Ball Bearings, QUEST (B3402E-2) (opens in a new tab)
PDF · English
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Catalog
Nachi Spherical Roller Bearings (B1032E-5) (opens in a new tab)
PDF · English
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Catalog
Nachi Radial Ball Bearings (B4031E-2) (opens in a new tab)
PDF · English
About the brand
About Nachi
Nachi-Fujikoshi, founded in Toyama, Japan, in 1928.
Nachi-Fujikoshi was founded on 21 December 1928 in Toyama City, Japan, as Fujikoshi Steel Industry. It makes bearings alongside cutting tools, hydraulics, robots and specialty steel. Its North American headquarters is in Greenwood, Indiana.
Genuine Nachi product
Founded
1928
Headquarters
Toyama, Japan
Known for
- Deep groove ball bearings (QUEST)
- Spherical roller bearings
- Precision bearings
- Ball screw support bearings
Disclaimer: Apollo Industries is not an authorized distributor, reseller, or representative of Nachi. All Nachi trademarks and product names are the property of their respective owners. We sell genuine Nachi products purchased through independent channels.
FAQ
NJ311 questions & answers
What are the dimensions of the Nachi NJ311?
The Nachi NJ311 has a 55 mm bore (d), a 120 mm outside diameter (D) and a 29 mm width (B). In inches: 2.165 × 4.724 × 1.142 in.
What type of bearing is the NJ311?
The Nachi NJ311 is a cylindrical roller bearing.
What internal clearance does the NJ311 have?
The Nachi NJ311 has C0 - Normal internal clearance.
Is this a genuine Nachi bearing?
Yes. Apollo Industries sells genuine Nachi products, purchased through independent channels. Apollo is not an authorized distributor, reseller, or representative of Nachi.
Do you ship the NJ311 the same day?
In-stock orders placed by 3 PM EST ship the same day. All orders over $100 ship free by ground with code FREESHIP.
Can I get quantity pricing or buy tax-exempt?
Yes. Apollo offers special rates for businesses and bulk orders. Use Request a quote on this page or call (248) 429-9073.
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