Bearing Cross Reference
Bearing identification
Find Your Bearing
Every field is optional.
Search Our Bearing Inventory by Size or Part Number
The Central Surplus Bearing Finder searches the bearings we have on the shelf and shows you the closest matches to what you enter. Search by the number stamped on the race, by measured dimensions, or both. Every field is optional, so start with whatever information you have.
The Bearing Finder compares your part number, dimensions, and bearing type against our inventory and lists the closest results it can find. It does not confirm that one manufacturer’s bearing is an approved replacement for another. Two bearings with the same bore, outside diameter, and width can still differ in seals, internal clearance, precision class, cage design, or load rating. Treat the results as a starting point, and check the full specifications on the product page against your application before you order. If you need a confirmed interchange, contact our team or the bearing manufacturer.
How to Search by Part Number
Most bearings carry a part number on the outer race or the shield. Type it in exactly as you see it. Dashes, dots, and spaces don’t affect the results, so 6205-2RS, 6205 2RS, and 62052RS are the same search. Adding the brand narrows the search, but it isn’t required. If we don’t stock that exact number, search by dimensions instead to see bearings of a similar size.
Bearing numbers follow a pattern that helps when only part of a stamp is readable. In a common deep groove ball bearing like the 6205, the first digit indicates the bearing type, the second indicates the series, and the last two digits indicate bore size. For bore codes 04 and higher, multiply by five to get the bore in millimeters, so a 6205 has a 25 mm bore. Suffixes describe features. ZZ or 2Z usually means metal shields on both sides, and 2RS usually means rubber seals on both sides, though each manufacturer uses its own codes. A C3 suffix means greater internal clearance than standard, which matters in high-heat or high-speed applications.
How to Measure a Bearing
If the number is gone, measurements will get you close. Use a set of calipers and record three dimensions: the bore (inside diameter), the outside diameter, and the width. Measure across the widest point of each, and take a couple of readings to account for wear. Enter your numbers in millimeters or inches and the tool converts them automatically. Any single dimension will start a search, but all three give you the most focused results.
Selecting the bearing type also helps a lot. A deep groove ball bearing and a cylindrical roller bearing can share the same envelope dimensions but are not interchangeable. If you’re unsure of the type, look at the rolling elements. Balls, straight rollers, tapered rollers, barrel-shaped rollers, and thin needles each point to a different family.
Tips for Best Results
- Clean the race before reading the stamp. A rag and a little degreaser often reveal a number that looked unreadable.
- Enter partial numbers. Even the base series, like 6205 or 22210, gets you close. Narrow by bearing type from there.
- Check “In stock only” to see only parts that are on our shelves and ready to ship today.
Bearing Cross Reference Guide
When a bearing fails, finding an exact replacement quickly can mean the difference between a minor hiccup and hours of costly downtime. With thousands of manufacturers and millions of part numbers, finding an equivalent part can feel like decoding a foreign language.
Knowing how to decode part numbers and match them to equivalent SKUs helps you reduce lead time, cut replacement costs, and take the guesswork out of compatibility, even when the original brand isn’t available. The sections below cover manufacturer abbreviations, ABEC and ISO precision classes, common interchange part numbers, and what to check for each major brand.
Bearing Manufacturer Abbreviations
When sourcing or replacing bearings, understanding manufacturer abbreviations is crucial. These shorthand codes often appear in catalogs, part numbers, and equipment documentation. Below are the manufacturers whose products Central Surplus carries, with their commonly used abbreviations.
| Abbreviation | Manufacturer |
|---|---|
| BRDN | Barden |
| BOW | Bower |
| CONS | Consolidated |
| DOD | Dodge |
| FAF | FAFNIR |
| FAG | FAG |
| GMN | GMN |
| IKO | IKO |
| INA | INA |
| KOYO | Koyo |
| LB | Link-Belt |
| MRC | MRC |
| NACHI | Nachi |
| NDH | NDH |
| NHBB | NHBB |
| NSK | NSK |
| NTN | NTN |
| RHP | RHP |
| ROL | Rollway |
| SLM | SealMaster |
| SKF | SKF |
| SNFA | SNFA |
| SNR | SNR |
| STEYR | Steyr |
| THK | THK |
| TIM | Timken |
| TORR | Torrington |
| TYSN | Tyson |
ABEC and ISO Precision Classes
When evaluating bearings for interchange, understanding ABEC classes (Annular Bearing Engineering Committee) is crucial. These classifications, set by the American Bearing Manufacturers Association (ABMA), help you determine how precise and tolerant a ball bearing is under load, speed, and temperature.
Higher ABEC ratings mean tighter tolerances and better precision, but not necessarily better performance for every application. For many industrial and general-purpose uses, a lower ABEC class is more cost-effective and completely suitable.
- ABEC 1: basic tolerance, suitable for general use and low-precision applications.
- ABEC 3: moderate precision and performance for standard machinery.
- ABEC 5: higher precision, used in high-speed machinery or motors.
- ABEC 7: very high precision, ideal for demanding speed or load conditions.
- ABEC 9: ultra-high precision, typically used in aerospace or scientific instrumentation.
ISO has its own tolerance classes under ISO 492, and they run the opposite way from ABEC. P0 (Normal) is the widest tolerance, and tolerances tighten as the class number drops through P6, P5, P4, and P2. ABEC is more common in the United States, while ISO standards are used internationally.
| ABEC class | ISO class | Bore deviation (µm) | OD deviation (µm) | Radial runout (µm) | Typical speed rating |
|---|---|---|---|---|---|
| ABEC 1 | ISO P0 (Class 6X) | ±10 | ±13 | 25 | Low |
| ABEC 3 | ISO P6 (Class 6) | ±8 | ±11 | 18 | Moderate |
| ABEC 5 | ISO P5 (Class 5) | ±6 | ±8 | 13 | High |
| ABEC 7 | ISO P4 (Class 4) | ±4 | ±5 | 6 | Very high |
| ABEC 9 | ISO P2 & P3 (Class 2) | ±2 | ±2.5 | 2 | Ultra high |
These numbers are simplified for readability and may vary by manufacturer or specific series.
Common Bearing Cross Reference Part Numbers
When you’re searching for a replacement bearing, cross-reference data is your shortcut to getting back up and running fast. Whether you’re an MRO tech replacing a worn part or a buyer managing a bill of materials across multiple OEM sources, the tables below show some of the most frequently interchanged bearing part numbers across manufacturers.
Note: Always double-check bore size, dimensions, tolerance class, and sealing before committing to a substitute.
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Cross-Referencing by Brand: Timken, SKF, NSK, and Koyo
Most cross-reference searches start with a brand name, and that matters because every manufacturer uses its own numbering system. The number stamped on your bearing tells you which system to look up, so read it carefully before you search for an equivalent.
Timken Bearing Cross Reference
Timken is best known for tapered roller bearings. These are usually sold as a cone and cup pair, and each half has its own part number. When you cross-reference a Timken bearing, check both the cone number and the cup number, along with the bore, outside diameter, and width. Interchange tables list equivalents from other brands for each cone and cup, so confirm both halves before you order.
SKF Bearing Cross Reference
SKF uses a basic designation followed by suffixes. The basic number shows the bearing type and size, and the suffixes describe details such as seals, cage type, and internal clearance. For example, 2RS usually means a rubber seal on both sides, and C3 means more internal clearance than normal. A cross reference that matches only the basic number can still give you a bearing with the wrong seals or clearance, so match the suffix too.
NSK and Koyo Bearing Cross Reference
NSK and Koyo (a JTEKT brand) both make many standard bearings that share the same ISO base number as other brands, such as 6205 for a deep groove ball bearing. The base number is usually the easy part. The suffix letters for seals, shields, and clearance differ by manufacturer, so check the maker’s catalog to see what each suffix means before you treat two bearings as equal.
Quick Checklist Before You Order an Equivalent
- Match the bore, outside diameter, and width.
- Match the bearing type, for example deep groove, tapered roller, or spherical roller.
- Match the seal or shield type and the internal clearance.
- For a pair such as a tapered roller bearing, match both the cone and the cup.
- If the old number is worn or missing, measure the bearing and send us the dimensions.
Not sure about a match, or don’t see your brand here? Search the finder at the top of this page, or send us the number through Find Your Part and we’ll help you cross-reference it.
Bearing Types We Stock
Central Surplus carries ball bearings (deep groove, angular contact, self-aligning, and thrust), roller bearings (cylindrical, tapered, spherical, needle, and thrust), and mounted units including pillow blocks, flange units, and take-up units. We also stock rod ends, cam followers, linear bearings, and sleeve bushings. Inventory comes in daily from manufacturers, distributors, and plant liquidations, so check back if nothing close is available today. You can also browse the full bearings category.
Why Buy Surplus Bearings
Surplus bearings are often new old stock from major brands at a fraction of distributor pricing. They’re also a reliable source for discontinued and obsolete part numbers that are hard to find through standard supply channels. For maintenance teams keeping older equipment running, that can mean the difference between a same-day repair and a multi-week wait on a backorder. Orders ship same day with free shipping.
Frequently Asked Questions
What is a bearing cross reference?
A bearing cross reference matches a known part number to an equivalent part from another manufacturer, with identical or compatible dimensions, tolerances, load ratings, and performance specs. It matters most when the original part is discontinued, or when you’re switching brands for cost, availability, or lead time.
Does the Bearing Finder confirm an approved interchange?
No. It searches our inventory for bearings that are close to the part number or dimensions you enter. It doesn’t verify that a bearing from one brand is an approved substitute for another. Use the results to narrow your search, then confirm the specs before ordering.
Are bearings from different brands interchangeable?
Sometimes, but not always. Many standard bearings follow ISO dimensional standards, so a 6205 from one maker typically shares the same bore, OD, and width as a 6205 from another. Other manufacturers use proprietary codes, so a 107KRDS from one brand can match a 7007CDU from another even though the numbers look unrelated. Seals, clearance, precision class, cage design, and materials can still differ, so check those details against your application before substituting.
Can I cross-reference bearings by dimensions alone?
It’s a start, but dimensions don’t tell the whole story. Two bearings with the same bore, OD, and width can differ in cage design (polyamide vs. brass), internal clearance (C0, C3), sealing (open, shielded, or sealed), and precision class. For low-risk applications a dimensional match may be enough. For anything involving speed, heat, or axial loading, compare the full specs.
Is it safe to use a cross-referenced bearing in critical applications?
Yes, but only if the replacement matches every specification that matters. For high-speed motors, precision robotics, or medical devices, check:
- ABEC tolerance class
- Load and speed ratings
- Sealing and lubrication method
- Internal clearance (C2, C3, C4)
A bearing that matches only on bore and outside diameter can still fail early if these are off.
Can I use a higher-precision bearing (like ABEC 7) in place of a lower-rated one?
Technically yes, but it may be overkill. Higher ABEC classes cost more and may need tighter mounting tolerances or more precise alignment. Unless the application demands it, like a CNC spindle or lab instrument, ABEC 7 or 9 may not perform noticeably better than ABEC 3 or 5. Don’t go the other way, though: match or exceed the original class unless a qualified engineer approves the change.
What does 2RS mean on a bearing?
It generally means the bearing has rubber seals on both sides to keep out dirt and moisture and hold in grease. Other brands use their own codes, such as 2RS1, DDU, LLU, or 2RSR, and seal designs vary between them.
What’s the difference between ZZ and 2RS?
ZZ bearings have metal shields, which allow higher speeds but offer less protection from contaminants. 2RS bearings have rubber seals that protect better but create slightly more friction.
What if my bearing has no readable part number, or I can’t find a match?
First, double-check the number. It’s easy to mix up a 0 and an O, or miss a suffix. If the stamp is gone, measure the bore, outside diameter, and width with calipers, identify the bearing type, and enter those details in the finder above. You can also look up the NSN (National Stock Number) or OEM code, or send us the details through Find Your Part for a manual lookup.
Do you sell discontinued bearings?
Often, yes. Surplus inventory regularly includes obsolete and hard-to-find part numbers. If it isn’t listed, contact us and we’ll search for it.
Are there other online bearing cross reference tools?
Yes. Many major brands offer online interchange tools, though each usually covers only its own product lines:
- The Central Surplus Bearing Finder at the top of this page, which searches our stock across all brands
- SKF Bearing Interchange
- NTN Part Number Lookup
- Smalley and Pacamor bearing interchange tools
- Amazon Business cross-brand filters
For complex or mixed-brand bills of materials, it’s often faster to send us your list. Our team cross-references all brands.
Why use Central Surplus for bearing cross reference help?
Central Surplus offers one of the most diverse inventories of industrial bearings in the country, carrying brands like Timken, SKF, FAG, MRC, RHP, NTN, and more. Our team understands how part numbers translate across catalogs, including legacy and OEM-specific variants. Send us your part number and we can:
- Identify compatible substitutes
- Ship in-stock parts the same day
- Help source rare or discontinued units
- Save you money with liquidation pricing on name-brand products
Need Help Confirming a Bearing?
If the finder doesn’t turn up what you need, or you’d like a second look at a result before ordering, our team can help. Send us the part number, a photo of the bearing, or your measurements through the Find Your Part page and we’ll help identify it and check what we can source. You can also call us at 585-295-7880.
Prefer to browse? See our bearings online or visit our eBay store.