Miniature Flanged Ball Bearings With Extended Inner Ring
Miniature flanged ball bearings with extended inner ring combine an outer-ring locating flange with a wider inner ring for compact bearing arrangements that need easier housing location and shaft-side positioning. This product list covers 68 FRW and SFRW models with bore sizes from 0.04688 to 0.3125 inches, including open and ZZ shielded designs in chrome steel or stainless steel. Distributors can compare bore, outer diameter, flange diameter and thickness, bearing width, inner-ring dimensions, radial load ratings and speed directly in the list. TFL supports bearing distributors and industrial resellers with cross-reference checking, mixed-model quotations, OEM or neutral packaging, and sourcing coordination based on part numbers, drawings, samples or required dimensions.
Double Benefits: Flange and Extended Inner Ring
Stable Support in Compact Design
Highly Integrated Solution
Miniature Flanged Extended Inner Ring Bearing Selection and Sourcing Guide
Miniature flanged ball bearings with extended inner ring combine an outer-ring flange for housing location with a wider inner ring for shaft-side positioning and assembly support. This product list covers FRW and SFRW models in open and ZZ shielded configurations, with chrome steel and stainless steel options. For distributor inquiries, the complete model number, dimensions, material and shield configuration should be confirmed before quotation or cross-reference approval.
How to Choose This Bearing Type
Choose this bearing type when the assembly requires both an outer-ring flange for location and an extended inner ring for wider shaft support, built-in spacing or easier positioning of adjacent components. Before selecting or replacing a model, confirm the bore, outer diameter, bearing width, flange diameter, flange thickness, inner-ring width and external diameter on the inner ring. The flange is primarily a locating feature, so load, fit and retaining requirements should still be checked separately.
Selection Note for Distributors
For replacement quotations, do not match only by bore and outer diameter. Models with similar basic dimensions may differ in flange geometry, inner-ring extension, material, shields or operating ratings. Ask the buyer for the complete part number, original brand reference, drawing or sample whenever possible. For mixed-model inquiries, include the required quantity for each line so alternative options and pricing can be reviewed together.
Common Series and Model Range
| Series or Feature | Available Range | Purchasing Note |
|---|---|---|
| FRW series | Chrome steel, open or ZZ shielded | Common option for general compact mechanisms where standard bearing steel is suitable. |
| SFRW series | Stainless steel, open or ZZ shielded | Useful where improved resistance to moisture or mild corrosion is required. |
| Bore range | 0.04688 to 0.3125 inches | Confirm the actual shaft diameter instead of selecting by size code alone. |
| Outer diameter range | 0.15625 to 0.625 inches | Check housing dimensions and fit requirements before interchange. |
| Flange outer diameter | 0.203 to 0.690 inches | Verify the flange seat, available housing face and mounting clearance. |
| Inner-ring width | 0.0937 to 0.2273 inches | Confirm how the extended inner ring interfaces with spacers, gears, pulleys or shaft shoulders. |
How to Read a Model Number: SFRW1ZZ Example
In SFRW1ZZ, the initial “S” identifies the stainless steel version in this catalog series, “FRW” identifies a miniature flanged bearing with an extended inner ring, “1” is the size code, and “ZZ” indicates two metal shields. The designation is useful for initial cross-reference work, but dimensions, material, shield configuration and operating requirements should still be confirmed before approving a replacement.
Open vs ZZ and Chrome Steel vs Stainless Steel
| Option | Typical Selection Reason | Points to Confirm |
|---|---|---|
| Open | Allows application-specific oil or grease lubrication with direct access to the rolling elements | Best suited to clean assemblies where lubrication and contamination are controlled by the equipment. |
| ZZ shielded | Metal shields help retain lubricant and reduce entry of light particles | ZZ shields are non-contact and should not be treated as liquid-tight seals. |
| Chrome steel | General industrial use, competitive cost and broad availability | Comparable listed chrome-steel models may have different load ratings from stainless versions; confirm the exact model specification. |
| Stainless steel | Improved resistance to moisture and mild corrosion | Stainless steel is not corrosion-proof; confirm the actual environment when corrosion resistance is important. |
Key Specifications to Confirm Before Quotation
| Specification | Why It Matters |
|---|---|
| Complete part number | Helps identify the correct size, material, shield and cross-reference family. |
| Bore and shaft fit | Determines shaft compatibility, running clearance and mounting stability. |
| Outer diameter and housing fit | Controls radial location and housing compatibility. |
| Flange diameter and thickness | Determines whether the flange will seat correctly against the housing face. |
| Inner-ring width and extension diameter | Affects shaft shoulders, spacers, gears, pulleys and adjacent components. |
| Open or ZZ configuration | Affects lubrication access, grease retention and contamination protection. |
| Material, load and speed | Should match the requested specification and expected operating conditions. |
| Quantity and packaging | Needed to review MOQ, volume pricing, OEM or neutral packaging and consolidated shipment options. |
EZO, NMB and Other Cross-Reference Notes
Distributors can use the flanged ball bearing cross-reference chart to compare TFL numbers with EZO-style, NMB-style, DYNAROLL-style, NHBB-style and MPB-style references. Cross-reference numbers are useful for initial sourcing, but they should not be treated as automatic proof of interchangeability. Confirm dimensions, flange geometry, inner-ring width, material, clearance, shields, lubrication and speed requirements before approving a replacement.
Common Applications
Miniature flanged extended inner ring bearings are commonly found in compact mechanisms such as micro motors, encoders, instruments, small pumps, office equipment, robotics and miniature drive assemblies. For distributor sourcing, the original bearing number and dimensional requirements are normally more useful than the equipment application alone when checking an interchangeable option.
Representative Models for Distributor Quotations
| Model | Specification Snapshot | Quotation Use |
|---|---|---|
| SFRW1ZZ | 0.05556-inch bore, stainless steel, ZZ shielded | Compact stainless reference model for replacement and cross-reference inquiries. |
| SFRW144ZZ | 0.125-inch bore, 0.250-inch OD, stainless steel, ZZ shielded | Useful mid-range model for distributor cross-reference lists. |
| SFRW166ZZ | 0.1875-inch bore, 0.375-inch OD, stainless steel, ZZ shielded | Represents a larger shielded stainless option within the series. |
| FRW0 | 0.04688-inch bore, chrome steel, open | Represents one of the smallest open chrome-steel configurations in the current list. |
Bulk and Mixed-Model Sourcing from TFL
TFL is positioned to support bearing distributors and industrial resellers that need multiple models or bearing types in one sourcing project. Send a bearing list with part numbers, quantities, original brand or cross-reference numbers, material and shield requirements, target packaging and any annual demand information available.
TFL can review suitable factory resources, alternative specifications, MOQ, availability and lead time by line item, then coordinate mixed-model quotation and consolidated shipment. Before shipment, we check the agreed model numbers, quantities, visible condition, packaging and basic quality requirements. OEM, private-label and neutral packaging requirements can also be reviewed according to model and order quantity.
Request a Mixed-Model FRW and SFRW Quote
Send your bearing list, original brand or cross-reference numbers, required quantities and packaging requirements. TFL can review the models together and provide a consolidated quotation.
Brand names and reference numbers are used only for product identification and cross-reference. TFL supplies replacement and alternative bearing options and does not imply that these products are original brand products or that TFL is an authorized distributor of the referenced brands.
FREQUENTLY ASKED QUESTIONS
How do the flange and extended inner ring work together?
- Load: Under high load, the aging speed of the lubricant is faster, and more frequent lubrication is required.
- Speed: The higher the speed, the higher the demand for lubricant.
- Temperature: High temperature can easily cause the lubricant to oxidise, while low temperature can make the lubricant thicker.
- Type of lubricant: Different lubricants have different performance and lifespan, and it is necessary to carefully read the relevant information of the lubricant.
- Type of seal: The better the sealing performance, the better the protection of the lubricant, and the longer the lubrication cycle.