Apollo USA
NSK Bearings for Motors, Pumps, Gearboxes and Spindles
Find the genuine NSK bearing you need by part number, size or type. 5,784 NSK part numbers in stock, with price and availability checked live.
Find your NSK bearing
Example part number 6205DDUC3
Example part number
6205DDUC3
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type
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series
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bore
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seals
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clearance
Every NSK family we stock
Search results
Not in our NSK range under that number.
Check the number on the ring, try the Size tab with the bore and outside diameter, or cross-reference it in the Apollo Bearing Index, which covers over 98,500 bearings from 100+ brands.
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In stock
Popular NSK bearings.
Common NSK replacement bearings, with live prices and stock.
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NSK
NSK 6205 DDUC3 Deep Groove Ball Bearing
25 mm ID, 52 mm OD, 15 mm Width, Cylindrical Bore, C3
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NSK
NSK 6203 DDU Deep Groove Ball Bearing
17 mm ID, 40 mm OD, 12 mm Width, Cylindrical Bore, Normal
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NSK
NSK 6204 ZZ Deep Groove Ball Bearing
20 mm ID, 47 mm OD, 14 mm Width, Cylindrical Bore, Normal
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NSK
NSK 6305 DDUC3 Deep Groove Ball Bearing
25 mm ID, 62 mm OD, 17 mm Width, Cylindrical Bore, C3
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NSK
NSK 6309 DDU Deep Groove Ball Bearing
45 mm ID, 100 mm OD, 25 mm Width, Cylindrical Bore, Normal
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NSK
NSK 22215 EAE4C3 Spherical Roller Bearing
75 mm ID, 130 mm OD, 31 mm Width, Cylindrical Bore, C3
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NSK
NSK NU210 EW Cylindrical Roller Bearing
50 mm ID, 90 mm OD, 20 mm Width, Cylindrical Bore, Normal
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NSK
NSK 7205-BW Angular Contact Ball Bearing
25 mm ID, 52 mm OD, 15 mm Width
The brand
NSK built Japan's first bearing company.
NSK Ltd. was founded in Tokyo on 8 November 1916 as Japan's first bearing manufacturer and produced its first bearings that year. Its bearings now turn in electric motors, pumps, gearboxes, machine tool spindles, rolling mills and vehicles, alongside the ball screws and linear guides that position machine tools.
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Since 1916
Japan's first bearing maker
NSK mass-produced bearings in its founding year, a first in Japan, and in 1918 built Japan's first large thrust bearings, for crane slewing rims.
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EP and Z steel
Cleaner steel, longer life
NSK's ultra-clean bearing steels cut down the oxide inclusions where fatigue cracks start, which extends rolling contact life.
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NSKHPS
More capacity in the same envelope
The High Performance Standard series raises load ratings and rating life over earlier NSK designs without changing boundary dimensions, so it fits existing housings.
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ROBUST
Super precision for spindles
ROBUST is NSK's high-speed super-precision series for machine tool spindles, built for low heat generation and high rigidity.
Product range
Series: 600, 6800, 6900, 6000, 6200, 6300
Deep groove ball bearings
Open, shielded (ZZ) or sealed (DDU contact, VV non-contact), from the miniature 600 series up; the bearing in most motors, pumps and fans.
Shop all 1,487Series: NU, NJ, NUP, N; 200, 300, 2200, 2300
Cylindrical roller bearings
High radial capacity for motors, gearboxes and rolling mills; E is the high-capacity design, with W pressed steel, M brass or T polyamide cages.
Shop all 1,047Series: 21300, 22200, 22300, 23000, 23100, 23200
Spherical roller bearings
Heavy loads with misalignment in screens, crushers, fans and conveyor pulleys; EA or CD pressed steel and CAM brass cages, E4 lube groove, K tapered bore.
Shop all 944Series: 30200, 30300, 32000, 32200, 32300; HR
Tapered roller bearings
Combined radial and axial loads in gear drives, wheels and axles; the HR prefix marks NSK's high-capacity design.
Shop all 215Series: 7000, 7200, 7300; 3200, 3300, 5200
Angular contact ball bearings
Single row at 30° (A) or 40° (B) for pumps and compressors, singly or in matched pairs, plus double-row 3200, 3300 and 5200 series.
Shop all 369Series: 7000, 7900, 7200; BSF, BSN
Super-precision spindle bearings
15° (C) and 25° (A5) spindle bearings to P4 and P3, as universal singles or matched sets, and ball screw support bearings.
Shop all 556Series: 1200, 1300, 2200, 2300
Self-aligning ball bearings
Two rows of balls in a spherical outer raceway for long or flexible shafts; K versions mount on an adapter sleeve.
Shop all 315Series: 51100, 51200, 51300; 29300, 29400
Thrust bearings
Axial loads: thrust ball bearings, and spherical roller thrust bearings for heavy axial loads with some misalignment.
Shop all 287Series: UCP, UCF, UCFL, UCFC, UCT; UK
Mounted bearing units
Insert bearings in pillow block, flange and take-up housings, ready to bolt onto conveyors and farm equipment, in metric and inch bores.
Shop all 340Series: Carriages and rails
Linear guides
NSK carriages and guide rails for machine tools, automation and positioning stages.
Shop all 221
Downloads
Every NSK catalog and technical guide, in one place.
Catalogs, maintenance guides and technical notes as NSK publishes them. Filter by type or search a title or bearing type; each PDF opens from nsk.com in a new tab.
NSK catalog library
Showing 20 documents
All bearing types
Rolling Bearings for Industrial Machinery
NSK's full industrial bearing catalog, with technical data and dimension tables. A large download.
Interchange
Bearing and Linear Replacement Guide
Bearing identification, nomenclature and replacement data for NSK ball, roller and linear products, with how to order a replacement.
Super precision
Super Precision Bearings
Super-precision bearings for machine tool spindles and ball screw supports, with technical data and dimension tables.
Deep groove ball
Deep Groove Ball Bearings
NSK's deep groove range: lower-noise rolling contact, lubricant and seal designs, and special materials for hard environments.
Spherical roller
NSKHPS Spherical Roller Bearings
NSKHPS spherical roller bearings for heavy and impact loads in steelmaking, mining, construction and paper machines.
Cylindrical roller
NSKHPS Cylindrical Roller Bearings
NSKHPS cylindrical roller bearings for motors, pumps, gearboxes, spindles and heavy steel and mining machinery.
Angular contact
High-Capacity Angular Contact Ball Bearings
NSKHPS angular contact ball bearings for combined loads in pumps, compressors, generators, spindles and fans.
Needle roller
Needle Roller Bearings
Needle roller cages, drawn cup and solid needle bearings, cam followers, roller followers and thrust needle bearings, with technical information.
Mounted units
Ball Bearing Units
Insert bearings in pillow block, flange and take-up housings, including NSK self-lube bearings.
Large size
Large-Size Rolling Bearings
Large ball, cylindrical, tapered, spherical and thrust bearings, plus steel mill, triple-ring and crossed roller bearings.
Molded-Oil
Molded-Oil Bearings
Bearings packed with oil-filled polymer for wet, dusty and hard-to-relubricate machinery in steel and paper mills.
Linear guides
NH and NS Series Linear Guides
Standard NSK linear guides with higher load ratings and longer life than the LH and LS series, and optional K1 lubrication units.
Troubleshooting
Bearing Doctor: Handling, Maintenance and Troubleshooting
Handling precautions, mounting, maintenance and troubleshooting for rolling bearings.
Maintenance
Bearing Maintenance Guide
Mounting and handling practices for operational reliability, from NSK Technical Services (2025 edition).
Electric motors
Electric Motor Handbook
A reference guide to bearing selection and handling for electric motors, including insulated bearings against stray current.
Authenticity
The Risks of Buying Counterfeit Bearings
Where counterfeit bearings come from, the risks they carry, and how to keep them out of your supply chain.
Clearance
Internal Clearance: Types and Norms
Radial and axial internal clearance, how it affects service life, vibration and noise, and the clearance classes.
Seals
Bearing Seals
Contact and non-contact seals: how each keeps lubricant in and contamination out.
Lubrication
Lubrication: Optimizing Bearing Life
How lubricant film thickness and the lubrication method affect bearing life.
Bearing life
Bearing Life: Calculating Fatigue Life
How to calculate the fatigue life of rolling bearings.
The company
NSK Ltd., Tokyo, since 1916.
NSK Ltd. was established in Tokyo on 8 November 1916. It makes bearings, ball screws and precision machinery for industry, and bearings, steering systems and transmission parts for vehicles.
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Founded
1916
8 November, Tokyo, Japan
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Headquarters
Tokyo
Nissei Building, Ohsaki, Shinagawa-ku
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Employees
26,278
consolidated, 31 March 2026
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Net sales
$5.73 billion
year ended 31 March 2026; ¥911.6 billion at ¥159.08 per dollar
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In the U.S. since
1962
JAMCO Corporation, renamed NSK Corporation in 1967
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U.S. production since
1975
Clarinda, Iowa; Franklin, Indiana from 1993
- 1914 Nippon Seiko partnership formed
- 1916 NSK Ltd. founded; first bearings produced
- 1918 Japan's first large thrust bearings, for crane slewing rims
- 1949 Japan's first miniature ball bearings, for cameras
- 1958 Ball screw mass production begins
- 1964 Journal bearings for the Tokaido Shinkansen
- 1975 U.S. production starts in Clarinda, Iowa
- 1997 NSK Americas, Inc. founded
How to order NSK from Apollo
Most NSK replacements take a minute: match the number or the size, confirm the suffixes, and order from stock. Orders over $100 ship free.
For larger quantities, tax-exempt accounts or a bearing we do not list, our sales team quotes it.
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Find
Search by part number, size or type at the top of this page
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Confirm
Check the seals, clearance and size in the part number breakdown
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Order
In-stock bearings ship from Oxford, Michigan
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Quote
Bulk, tax-exempt and hard-to-find parts from our sales team
Ann Arbor, Michigan
NSK in North America
NSK's U.S. business began in 1962 as JAMCO Corporation, renamed NSK Corporation in 1967. Bearing production started in Clarinda, Iowa in 1975 through the Hoover-NSK joint venture, followed by the Franklin, Indiana plant in 1993 and the Liberty, Indiana plant in 1996. The NSK Americas Technical Center opened in 1988, and NSK Americas, Inc., founded in 1997, runs the region from Ann Arbor, Michigan.
FAQ
Questions buyers ask about NSK bearings.
Short answers to what our sales team hears most. For a specific application, ask a bearing specialist.
What are NSK bearings?
NSK bearings are rolling bearings made by NSK Ltd., founded in Tokyo on 8 November 1916 as Japan's first bearing manufacturer. The range covers deep groove, angular contact and self-aligning ball bearings, cylindrical, tapered and spherical roller bearings, thrust bearings, super-precision spindle bearings and mounted units, alongside NSK ball screws and linear guides.
How do I read an NSK part number such as 6205DDUC3?
Read it left to right. 6 is a deep groove ball bearing, 2 is the light diameter series and 05 is the bore code, which from 04 upward is multiplied by 5, so 25 mm; bore codes 00 to 03 mean 10, 12, 15 and 17 mm. DDU is contact rubber seals on both sides and C3 is radial internal clearance greater than normal. Type any number into the finder to see it broken down; the full nomenclature is in NSK's Bearing and Linear Replacement Guide in the catalog library.
What is the difference between NSK ZZ, DDU and VV?
ZZ has steel shields on both sides. They do not touch the inner ring, so friction is lowest, but they only keep out larger debris. DDU has contact rubber seals, the best protection against dust and water, with a little more friction and a lower speed limit. VV has non-contact rubber seals, which protect better than shields while keeping friction low.
All three share the same dimensions, so a 6205ZZ, 6205DDU and 6205VV swap directly.
What does C3 mean, and when do I need it?
C3 means the bearing has more radial internal clearance than normal. The extra room keeps it from preloading itself when the inner ring runs hotter than the outer ring or sits on a tight shaft fit, which is common in electric motors, pumps and fans.
Replace a C3 bearing with a C3 bearing. No clearance code means normal clearance (CN).
Do NSK bearings interchange with SKF, FAG, NTN or Timken?
For standard metric sizes, yes. The basic number (6205, 22215, NU210) is an ISO size, so the bore, outside diameter and width are the same from any maker. The suffixes differ: SKF 2RS1 or 2RSH, FAG 2RSR and NTN LLU are NSK DDU; SKF 2Z and FAG 2ZR are NSK ZZ; SKF W33 is NSK E4. Check the cage, clearance and precision class too.
Type another brand’s number into the finder and it is translated to NSK; for other brands entirely, use the Apollo Bearing Index.
How do I find an NSK bearing when the number has worn off?
Clean the bearing and measure the bore (d), outside diameter (D) and width (B) with calipers, then enter them in the Size tab of the finder. Note whether it has steel shields, rubber seals or neither.
If you cannot measure it, send us photos and whatever dimensions you have and a specialist will identify it.
How do I know an NSK bearing is genuine?
Buy from a distributor you trust and check the box. NSK’s free NSK Verify app scans the 2D code on NSK precision bearing boxes marked with an N, and the WBA Check app from the World Bearing Association covers other member brands. Apollo sells genuine NSK bearings only, never copies or unbranded substitutes.
Where are NSK bearings made?
NSK makes bearings in Japan and at plants around the world, including Franklin and Liberty, Indiana in the U.S. The country of origin is marked on the bearing or its packaging.
How fast does Apollo ship, and do you quote quantity pricing?
In-stock NSK bearings ship from Oxford, Michigan, and orders over $100 ship free. The finder shows live stock on every result. For larger quantities, B2B pricing or tax-exempt orders, request a quote.
How do I choose the right NSK bearing, and who can help?
Start with the number on the old bearing, or its bore, outside diameter and width. If the machine has changed or the old bearing failed early, ask a bearing specialist: send the part number, the machine and what failed, and we will recommend the NSK part with the right seal and clearance options.
Contact
Have the part number? Apollo can match it.
Send the number stamped on the bearing, a photo, or its bore, outside diameter and width, and a specialist confirms the NSK part and the seal and clearance options.
Authenticity check
Scan the 2D code on an NSK precision bearing box with the free NSK Verify app; the WBA Check app covers other World Bearing Association brands.