Apollo USA
NACHI Bearings for Demanding Industrial Applications
Shop NACHI ball and roller bearings for industrial applications. Find the right bearing for your load, speed, and precision requirements with expert support from Apollo Industries.
Find your Nachi bearing
Example part number
6205-2NSE9C3
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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 Nachi family we stock
Search results
Not in our Nachi 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.
- d
- D
- B
The brand
Nachi makes the steel before it makes the bearing.
Nachi-Fujikoshi has made its own special steel in Toyama since 1938 and its own bearings since 1939, an integrated production system from material to finished part. The bearing business grew out of cutting-tool manufacture and borrowed its grinding and heat-treatment know-how.
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Since 1938
Its own bearing steel
Standard Nachi bearings run on vacuum-degassed, high-carbon chrome bearing steel from Nachi's own Toyama steelworks, and the catalog load ratings are calculated on that material.
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ISO normal to UP
Ground to the class you specify
Standard deep groove bearings are made to ISO normal tolerance (ABEC 1), with P6, P5, P4, P2 and Nachi class UP available. Raceways are ground on special machine tools and heat-treated for rolling-fatigue resistance.
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Since 1964
Tools, heat treatment and bearings from one company
The bearing line started by applying Nachi's cutting-tool grinding and heat-treatment expertise to its own steel. In 1964 that heat-treatment technology became a business of its own, and the group still makes the furnaces, coatings and tools around the bearing.
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10 to 320 mm
One brand from a 10 mm bore to 320 mm
The North American line runs from 6800 to 6300 series deep groove ball bearings in 10 to 200 mm bores to spherical roller bearings up to 320 mm. Precision angular contact, BNH spindle and TAB ball screw support bearings cover machine tools at ABEC 7.
Product range
Series: 6800, 6900, 6000, 6200, 6300
Deep groove ball bearings
The QUEST line: open, shielded (ZZE) or sealed (2NKE, 2NSE), 10 to 200 mm bores, with Nachi's long-life grease.
Shop the seriesSeries: 7000, 7200, 7300, 7900; 5200, 5300
Angular contact ball bearings
Single row at 15° (C), 30° (A) or 40° (B) contact angle, universal flush ground for pairing; double row 5200 and 5300, open, sealed (2NS) or shielded.
Shop the seriesSeries: 1200, 1300, 2200, 2300
Self-aligning ball bearings
Two rows of balls in a spherical outer raceway for shafts that deflect or sit out of line, 10 to 70 mm bores; K versions have a 1:12 tapered bore for an adapter sleeve, G a nylon cage.
Shop the seriesSeries: NU 200, 2200, 300, 2300
Cylindrical roller bearings
NU, NJ, N, NUP and NN configurations in steel, brass or nylon cages; E is the high-capacity design, EG high capacity with a nylon cage.
Shop the seriesSeries: 30200, 30300, 32000, 32200, 32300
Tapered roller bearings
Metric series with ISO-interchangeable rings (J suffix), 20 to 100 mm bores; inch series also stocked.
Shop the seriesSeries: 22200, 22300, 23000, 23100, 23200, 23900, 24000, 24100
Spherical roller bearings
EXQ high-capacity design, 25 to 320 mm bores, heat-treated for minimal dimension change up to 200 °C; EXQ-V for vibrating screens.
Shop the seriesSeries: 29300, 29400
Spherical roller thrust bearings
EXS1 design, 60 to 300 mm bores, steel or brass cage, for combined axial and radial loads.
Shop the seriesSeries: 51100, 51200, 51300; TAU
Thrust ball bearings
Single-direction thrust ball bearings for axial loads, 10 to 160 mm bores, plus sealed TAU ball screw support bearings for machine tool feed drives.
Shop the seriesSeries: 7000C, 7200C, 7900C; BNH; TAB; NN3000
Precision and spindle bearings
ABEC 7 (ISO P4) angular contact bearings at 15° and 25°, BNH small-ball spindle bearings, TAB ball screw support bearings at 60° and NN3000 double-row cylindrical.
Shop the series
3D model
Turn the bearing over before you order.
Drag the model to see the cage, the balls and the raceway groove that a catalog drawing flattens. The numbers match the parts list beside it.
Show
Your browser cannot show the 3D model. The poster image shows the same bearing and the spec panel lists its dimensions.
Drag to turn the bearing
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Outer ring
The outer ring seats in the housing and carries the outer raceway; press on this ring only when fitting it into a housing.
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Inner ring
The inner ring presses onto the shaft and carries the bore, d on the drawing; Nachi designs its sealed and shielded variants for inner-ring rotation.
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Ball
Standard bearings use high-carbon chrome bearing steel balls to carry the load between the two raceways; a ceramic hybrid uses silicon nitride balls instead.
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Cage
The riveted pressed-steel cage keeps the balls spaced and guided; no suffix means pressed steel, G means polyamide, which is used below 120 °C.
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Raceway groove
The ground groove in each ring that the balls run in; Nachi grinds raceways on special machine tools and heat-treats the rings for rolling-fatigue resistance.
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Snap ring
The snap ring (NR) clips into a groove in the outer ring and locates the bearing against the housing face, so the housing needs no shoulder on that side.
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Rubber seal
Contact rubber seals (2NSE) on both sides: the lip rides on the inner ring to keep out dust and water and hold the grease in, rated -25 to 100 °C.
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Metal shield
Steel shields (ZZE) on both sides hold the grease in and keep dust out through a small gap, with no added drag; not for wet locations, -25 to 120 °C.
Nachi
6212
Deep groove ball bearing, single row
- Bore d
- 60 mm
- Outer diameter D
- 110 mm
- Width B
- 22 mm
- Seals
- none
- Snap ring
- Fitted in the outer ring (NR)
- Ring outside diameter 116.6 mm max, 2.46 mm thick
- Clearance
- Normal (CN)
- 8 to 28 µm radial for a 60 mm bore; C3 is 23 to 43 µm
- Dynamic load rating Cr
- 52,500 N
- Static load rating C0r
- 36,000 N
- Tolerance class
- ISO normal
- ABEC 1
- Limiting speed
- 6,000 rpm
- With grease; 7,100 rpm with oil
- Limiting speed
- 6,000 rpm
- With grease
- Limiting speed
- 3,800 rpm
- With grease; the contact seals add drag
Downloads
Every Nachi bearing catalog and technical PDF, in one place.
Catalogs, technical data and guides as Nachi publishes them, filed by catalog number. Filter by type or search a title or number; each PDF opens in a new tab.
Nachi catalog library
Showing 15 documents
Catalog number B2100E-4
Ball & Roller Bearings
The general catalog: every standard series with dimensions, load ratings and limiting speeds.
Catalog number B3402E-2
Deep-groove Ball Bearings (QUEST)
6000 to 6300 series: dimensions, ratings, ZZE, 2NKE and 2NSE options and Nachi's long-life grease.
Catalog number B1040E-4
Cylindrical Roller Bearings
NU, NJ, N, NUP and NN series with cage options and the E and EG high-capacity designs.
Catalog number B1032E-5
Spherical Roller Bearings
The spherical roller and spherical roller thrust catalog with dimensions and ratings.
Catalog number B3207E-4
Spherical Roller Bearings EXQ series
The current high-capacity EXQ design: features, dimensions and ratings.
Catalog number NE-18084
Spherical Roller Bearings EXQ-V
The EXQ-V design for vibrating screens and other vibrating machinery.
Catalog number B3206E-2
Spherical Roller Thrust Bearings EXS1 series
29300 and 29400 series thrust bearings, 60 to 300 mm bores, steel or brass cage.
Catalog number B1031E-7
Precision Rolling Bearings
Super precision angular contact, BNH spindle, TAB ball screw support and NN30 double-row cylindrical bearings.
Catalog number B4031E-2
Radial Ball Bearings
Radial ball bearing series beyond the QUEST deep groove line.
Catalog number B5012E-2
Ball Bearing Units
UC inserts, UCP pillow blocks and the other housed unit types.
Catalog number B3119E-2
High Load Capacity Ball Screw Support Bearings
TAB series 60° angular contact bearings for ball screw support.
Catalog number NO-NEB0411-1
Sheave Bearings
E50 series bearings for crane and hoist sheaves.
Type Guides
Bearing Training Manual
Nachi America's manual: part-number decoding, clearance, lubrication, fits, mounting and failure analysis.
Type Guides
Bearing Failure Poster
Failure modes with photographs and causes, for the shop wall.
Type Guides
Shaft Housing Poster
Shaft and housing fit recommendations on one sheet.
The company
Nachi-Fujikoshi, Toyama, since 1928.
Nachi-Fujikoshi Corp. was founded in Toyama, Japan on 21 December 1928 to make cutting tools. Today it makes bearings, tools, robots, hydraulics and the special steel that goes into them, and bearings are its largest product segment.
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Founded
1928
Toyama, Japan
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Own special steel since
1938
integrated production from material to part
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Bearings since
1939
built on cutting-tool grinding and heat treatment
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Consolidated net sales
$1.51 billion
year ended 30 November 2025; ¥235.9 billion; bearings 36%
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Employees
6,530
consolidated
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Group companies
48
22 in Japan, 26 overseas
- 1928Fujikoshi founded; hacksaw blades
- 1938In-house special steel for tools
- 1939Bearing production begins
- 1963Renamed Nachi-Fujikoshi
- 1976Local production in the U.S. begins
- 1988Nachi Technology Inc. opens in Indiana
- 1995ISO 9001 in every division
- 2017Bearing plant established in India
How a Nachi bearing is made
The steel comes first. Nachi has made its own bearing steel in Toyama since 1938, a year before its first bearing, and still does. Rings and rolling elements are heat-treated for rolling-fatigue resistance, raceways are ground on special machine tools, and each division has held ISO 9001 since 1995.
Nachi describes the result as an integrated production system from materials to end products: the group also makes the furnaces, coatings, cutting tools and machine tools around the bearing line.
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1
Steelmaking
Nachi's own vacuum-degassed chrome steel
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Forging and turning
Ring blanks shaped in Nachi's own forging plants
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3
Heat treatment
Rolling-fatigue hardening, Nachi's own since 1964
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4
Grinding
Raceways ground to class on special machine tools
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5
Assembly and inspection
Cage, seals and grease fitted under ISO 9001
Greenwood, Indiana
Nachi in North America
Nachi began selling in the U.S. in 1962 from New York and started local production in 1976. The Nachi Technical Center, a bearing engineering lab, opened in Indiana in 1987, followed in 1988 by Nachi Technology Inc., which makes automotive bearings there. Since 2009 Nachi America Inc. has been headquartered at 715 Pushville Road, Greenwood, Indiana, with offices in California and Florida, Nachi Canada in Concord, Ontario, and Nachi Mexicana in Querétaro. Nachi America belongs to the World Bearing Association, ABMA, PTDA, BSA and EASA, and sells industrial bearings through authorized distributors.
FAQ
Questions buyers ask about Nachi bearings.
Short answers taken from Nachi's technical catalog and training manual. For a specific application, ask a bearing specialist.
What are Nachi bearings?
Nachi bearings are rolling bearings made by Nachi-Fujikoshi Corp. of Toyama, Japan, a company founded in 1928 that has made its own bearing steel since 1938 and bearings since 1939. The range covers deep groove and angular contact ball bearings, cylindrical, tapered and spherical roller bearings, and precision spindle bearings. Bearings are Nachi's largest product segment, about 36% of group sales in the year ended November 2025.
How do I read a Nachi part number such as 6205-2NSE9 C3?
Read it left to right. 6 is a single-row deep groove ball bearing, 2 is diameter series 2 and 05 is the bore number, which from 04 upward is multiplied by 5, so 25 mm; bore numbers 00 to 03 mean 10, 12, 15 and 17 mm. 2NSE9 is contact rubber seals on both sides, and the 9 is used on 10 to 50 mm bores. C3 is radial internal clearance greater than normal; the full structure, with cage, design and tolerance codes, is in the Technical Information PDF in the document library.
What is the difference between ZZE, 2NKE and 2NSE?
ZZE is a steel shield on each side: the lowest torque, good grease retention and dust exclusion, no water resistance, rated −25 to 120 °C with standard grease. 2NKE is a non-contact rubber seal on each side: torque close to a shield with better dust exclusion. 2NSE is a contact rubber seal whose lip runs on the inner ring: the best dust and water exclusion, slightly more drag, −25 to 100 °C with standard grease. All three are greased for life and should not be washed or heated before mounting.
What does C3 mean and when do I need it?
C3 is radial internal clearance greater than normal (CN). Nachi's U.S. training manual calls it the stock standard in the U.S., for higher speeds and for shafts where the inner ring runs hotter than the housing or has an interference fit. C4 is larger still, for high speed plus heat; C2 is smaller, for slow, precise applications. For a 25 mm bore, C3 is 13 to 28 µm of radial clearance against 5 to 20 µm for CN.
Do Nachi bearings interchange with SKF, NSK, NTN, FAG or Timken?
Dimensionally, yes: Nachi standard bearings use ISO 15 / JIS B 1512 boundary dimensions, so a 6205 is 25 × 52 × 15 mm from any brand. Match the suffixes, not only the basic number: distributor comparison tables list Nachi 2NSE beside SKF 2RS1, NSK DDU, NTN LLU and FAG 2RSR, and Nachi ZZE beside SKF 2Z and NSK ZZ, so confirm the seal, clearance and tolerance class against the catalog before substituting. Nachi does not publish a brand cross-reference; use Apollo's bearing interchange tool or ask a bearing specialist.
Where are Nachi bearings used?
Nachi lists automobiles, industrial machinery, railroads, construction machinery, machine tools and electric equipment as its bearing markets. Nachi America publishes application guides for machine tools, pumps, gearboxes, electric motors, steel mills, flour mills and crane sheaves, and ceramic hybrid bearings for motors where shaft current would arc through steel balls. Precision BNH and 7000C series bearings run the spindles of high-speed machining centers.
How do I know a Nachi bearing is genuine?
Nachi says counterfeit bearings are widespread in some countries, copy its trademarks, packaging and stamps, and can fail in service. Buy only through Nachi branches and authorized distributors. Every genuine box carries a data-matrix code; scan it with the World Bearing Association's Bearing Authenticator app for Android or iOS to confirm it, or visit stopfakebearings.com.
Where are Nachi bearings made?
Nachi makes bearings at the Mizuhashi and Nagaresugi plants in Toyama, Japan, and at group plants in Thailand, China, India, the Czech Republic, Brazil, Mexico and the U.S., where Nachi Technology Inc. in Indiana makes automotive bearings. Standard radial bearings have been consolidated in Thailand and special automotive bearings in Japan. The country of origin is printed on each box, so ask for it by part number rather than assuming one country.
How fast can Apollo ship, and do you quote quantity pricing?
Ask a bearing specialist with the part number and quantity; stock, lead time and quantity pricing are confirmed on every quote.
How do I choose the right Nachi bearing, and who can help?
Nachi's selection order is load type and magnitude, speed, misalignment, rigidity, noise, then mounting and dismounting, and the size is checked against rating life: L10 = (C/P)^p × 10^6 revolutions, with p = 3 for ball bearings and 10/3 for roller bearings. The Nachi digital catalog has calculators for bearing life, load, clearance and fits. If you have a drawing, a failed bearing or a competitor's part number, ask a bearing specialist and send what you have.
Contact
Have the part number? Apollo can match it.
Send the number on your drawing, or the markings on the bearing you are replacing, and a specialist confirms the Nachi part and the seal and clearance options.
Authenticity check
Every Nachi box carries a data-matrix code you can check with the WBA Bearing Authenticator app.