JTEKT-KOYO 6308-ZZCM Deep Groove Ball Bearing - 40 mm ID, 90 mm OD, 23 mm Width
- d 40 mm
- D 90 mm
- B 23 mm
- Double Metal Shields
- C0 - Normal
Genuine JTEKT-KOYO product, JTEKT-KOYO
- Regular price
- $94.19
- Sale price
- $94.19
- Regular price
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$9.90
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Order by 3 PM ET for same-day shipping
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JTEKT-KOYO 6308-ZZCM
$94.19
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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Same-day shipping
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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Price match
Show us a competitor's advertised price on the same item and we will match it.
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Expert support
Support staff available by phone, web chat or email.
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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
JTEKT-KOYO 6308-ZZCM Deep groove ball bearing
Deep Groove Ball Bearing
JTEKT-KOYO deep groove ball bearings are versatile, robust, and accommodate radial and axial loads in both directions. Their simple design, low friction, and high speed capability make them suitable for a wide range of industrial applications, from electric motors to gearboxes. Sealed and shielded variants protect against contamination, while open versions allow easy lubrication.
Key features
- Versatile design for radial and axial loads
- Low friction and high speed capability
- Available open, shielded, or sealed
- Long service life with low maintenance
- Suitable for a wide range of applications
Specifications
JTEKT-KOYO 6308-ZZCM dimensions & specifications
- Bearing type
- Deep groove ball bearing
- Bore diameter d
- 40 mm (1.575 in)
- Outside diameter D
- 90 mm (3.543 in)
- Width B
- 23 mm (0.906 in)
- Seals / shields
- Double Metal Shields
- Internal clearance
- C0 - Normal
- Weight
- 1.38 lb
- Brand
- JTEKT-KOYO
- Part number
- 6308-ZZCM also written 6308ZZCM
- UPC / EAN
- 4549250170751
All specifications
Dimensions
| Bore Diameter | 40 mm |
| Outside Diameter | 90 mm |
| Width | 23 mm |
Properties
| Material | Standard bearing steel |
| Material of rolling elements | Standard bearing steel |
| Cage | Sheet steel cage |
| Seal | Cover on both sides |
| Bore | Cylindrical bore |
| Clearance | Normal radial clearance with restricted tolerances |
| Outer ring | Without flange/groove |
| Tolerance class | Tolerance class P0/PN2 / ABEC 1 |
| Temperature range | -20 to +150 °C |
| Ball rows | Single row bearing |
| Current insulation | No current insulation |
Logistics
| Product Net Weight | 0.624 |
Tools & lubrication
Complete the job for your 6308-ZZCM
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 6308-ZZCM means
- 63
- 63xx medium deep groove ball (dimension series 03)
- 08
- Bore code 08 × 5 = 40 mm (ISO convention)
- ZZ
- Fixed shields, both sides
- CM
- Radial internal clearance for electric motor bearings (deep groove ball bearing)
Catalogs & documents
Koyo (JTEKT) 6308-ZZCM catalogs & documents
Official catalogs and data from the manufacturer. They open as PDFs in a new tab.
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Catalog
JTEKT Ball & Roller Bearings: Specification tables (BS004EN-2DS) (opens in a new tab)
PDF · 5.3 MB · English
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Technical
JTEKT Ball & Roller Bearings: Technical section (BS004EN-2DS) (opens in a new tab)
PDF · 2.4 MB · English
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Catalog
JTEKT Needle Roller Bearings (BS007EN-1DS) (opens in a new tab)
PDF · 18.7 MB · English
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Catalog
JTEKT Insert Bearing Units (BS006EN-0DS-A) (opens in a new tab)
PDF · 7.2 MB · English
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Catalog
JTEKT Inch Series Tapered Roller Bearings (BS001EN-0DS-A) (opens in a new tab)
PDF · 3.2 MB · English
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Guide
JTEKT Ball & Roller Bearings: Failures, Causes and Countermeasures (WS001EN-0DS) (opens in a new tab)
PDF · 5.8 MB · English
About the brand
About Koyo (JTEKT)
Koyo, the JTEKT bearing brand, since 1921.
Zenichiro Ikeda founded Koyo Seiko in Osaka in 1921 as a private store that sold imported bearings, and it soon began making its own; in 1927 it commercialized Japan's first tapered roller bearing. In 2006 Koyo Seiko and machine tool maker Toyoda Machine Works merged to form JTEKT Corporation, headquartered in Kariya, Aichi, Japan.
Koyo introduced its HI-CAP tapered roller bearing in 1968 and launched the world's first ceramic bearings in 1984.
Since April 2022 Koyo bearings carry the JTEKT name: the same company, factories and products under one name, JTEKT says. Boxes may read "JTEKT, formerly sold as Koyo", and bearings in new boxes may still be stamped Koyo. From September 2026 new boxes read "Koyo, JTEKT Bearing Brand", and old and new boxes will be on the market together for a while.
Genuine Koyo (JTEKT) product
Founded
1921
Headquarters
Kariya, Aichi, Japan (JTEKT)
Employees (March 2026)
43,233
Sales (year to March 2026)
¥1.92 trillion
Known for
- Tapered roller bearings (HI-CAP, low-torque LFT)
- Needle roller bearings
- Ceramic bearings
- Insert bearing units
Disclaimer: Apollo Industries is not an authorized distributor, reseller, or representative of Koyo (JTEKT). All Koyo (JTEKT) trademarks and product names are the property of their respective owners. We sell genuine Koyo (JTEKT) products purchased through independent channels.
FAQ
6308-ZZCM questions & answers
What are the dimensions of the JTEKT-KOYO 6308-ZZCM?
The JTEKT-KOYO 6308-ZZCM has a 40 mm bore (d), a 90 mm outside diameter (D) and a 23 mm width (B). In inches: 1.575 × 3.543 × 0.906 in.
What type of bearing is the 6308-ZZCM?
The JTEKT-KOYO 6308-ZZCM is a deep groove ball bearing.
Is the 6308-ZZCM sealed or shielded?
The JTEKT-KOYO 6308-ZZCM is shielded: Double Metal Shields.
What internal clearance does the 6308-ZZCM have?
The JTEKT-KOYO 6308-ZZCM has C0 - Normal internal clearance.
Is this a genuine JTEKT-KOYO bearing?
Yes. Apollo Industries sells genuine JTEKT-KOYO products, purchased through independent channels. Apollo is not an authorized distributor, reseller, or representative of JTEKT-KOYO.
Do you ship the 6308-ZZCM 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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