I Have the Complete SR144 Number
Use the full number, including suffixes and additional design codes.
Dental Bearing Family Reference
SR144 Dental Bearing Family and Variants
SR144 is a miniature inch-series bearing designation used as a base reference for multiple bearing configurations. Compare dimensions, suffixes, contact design, rolling-element material, cage, shield, special geometry and supporting dental handpiece application evidence to identify the correct SR144 variant.
Compatibility warning: SR144 is a base bearing reference, not a complete dental compatibility specification. A full bearing number, geometry and application review may be required before ordering.
Use the exact model, bearing number and application details for identification.
Base Reference
SR144
Miniature inch-series bearing family
SR144
Miniature inch-series bearing family
Nominal Bore / ID
0.1250″
Approximately 3.175 mm
0.1250″
Approximately 3.175 mm
Nominal OD
0.2500″
6.35 mm
0.2500″
6.35 mm
Base Open Width
0.0937″
Approximately 2.38 mm
0.0937″
Approximately 2.38 mm
Dental Variants
Verify Full Number
Width, shield and geometry may differ
Verify Full Number
Width, shield and geometry may differ
Base dimensions are a starting point, not a universal dental specification.
Dental SR144-based products may use different widths, shields, cages, rolling-element materials, contact designs, flanges, steps or ring extensions.
Dental SR144-based products may use different widths, shields, cages, rolling-element materials, contact designs, flanges, steps or ring extensions.
Start with What You Know
Find the Correct SR144 Bearing Path
I Only Know “SR144”
Compare width, contact design, material, cage, shield and geometry.
I Know the Handpiece Model
Use the brand, exact model, turbine or cartridge version and bearing position.
My Bearing Is Unmarked or Damaged
Submit dimensions, geometry, photos and application information for review.
Bearing Family Definition
What Does SR144 Mean?
SR144 is a miniature inch-series bearing designation used as a base reference. In dental applications, the complete bearing number and physical construction may identify a more specific SR144-based variant.
- The base family helps identify nominal size.
- Suffixes or additional codes may describe a more specific configuration.
- Suffix meanings may vary by manufacturer or numbering system.
- Dental variants can differ in width, shield, cage, geometry and internal design.
- Application compatibility should be confirmed separately.
Base vs Application Variant
Base SR144 vs Dental SR144 Variants
| Feature | Base SR144 Reference | Dental SR144 Variant |
|---|---|---|
| Bore / ID | Nominal SR144 family dimension | Confirm the exact product specification |
| Outer Diameter | Nominal SR144 family dimension | Verify flange or special outer geometry |
| Width | Base open reference width | May differ by variant |
| Shield | Base configuration | Open, shielded, integral or another specified design |
| Cage | Product-specific | May differ by dental variant |
| Rolling Element | Product-specific | Steel- or ceramic-ball variants may exist |
| Contact Design | Base-specific | Radial / angular-contact variants may exist |
| Geometry | Standard base geometry | May be smooth, flanged, stepped, grooved or extended |
| Application | General bearing reference | Requires supporting handpiece / assembly evidence |
Dimensions
SR144 Bearing Dimensions
Use the base SR144 dimensions as a family reference. Do not assume every dental SR144 variant uses the same width or external geometry.
| Dimension | Inch | Metric | How to Use It |
|---|---|---|---|
| Bore / ID | 0.1250″ | Approximately 3.175 mm | Base-family identification field |
| Outer Diameter | 0.2500″ | 6.35 mm | Base-family identification field |
| Base Open Width | 0.0937″ | Approximately 2.38 mm | Do not apply universally to dental variants |
Measure the actual bearing. Dental SR144 variants may use another outer width, inner-ring width, flange, step or extension.
Numbering Systems
Understanding SR144 Bearing Suffixes
A suffix or added design code can help distinguish one SR144 configuration from another, but suffix meanings should not be treated as globally universal.
- Keep the complete original bearing number when recording a reference.
- Do not remove letters, spaces or suffix codes before the original value is stored.
- Keep a normalized copy only for comparison; preserve the original marking.
- Record the source manufacturer or supplier when decoding a suffix.
- Treat an internal or supplier code as a separate reference.
Manufacturer-specific warning: the same letter or suffix should not be assumed to have the same meaning in every bearing-number system.
Physical Geometry
Common SR144 Dental Bearing Geometry
Geometry can distinguish two SR144-based products even when the base bore and outer diameter are similar.
Generic geometry illustration: not evidence of a specific SR144 product configuration.
Smooth / Plain
Standard external profile without an application-specific flange or visible stepped feature.
Flanged
Record flange OD and flange width separately from the main bearing dimensions.
Grooved / Stepped
Special ring features may be important to fit, assembly or handpiece application.
Extended Inner Ring
Record inner-ring width separately when it differs from the outer-ring width.
Contact Design
Radial and Angular-Contact SR144 Variants
Radial / Deep-Groove SR144 Variants
Confirm the exact product design and intended application. A shared base number or external size does not prove that two internal designs are equivalent.
Angular-Contact SR144 Variants
Angular-contact construction should be treated as an application-specific design characteristic and confirmed against the complete bearing number and assembly.
Contact design is part of the full specification. Do not infer radial or angular-contact construction from the base SR144 designation alone.
Rolling-Element Material
Steel-Ball and Ceramic-Ball SR144 Variants
SR144-based dental configurations may use different rolling-element materials. Material helps describe the variant but does not identify the complete application.
| Attribute | Steel-Ball SR144 Variant | Ceramic-Ball SR144 Variant |
|---|---|---|
| Rolling Element | Steel as specified by SKU | Ceramic as specified by SKU |
| Ring Material | Product-specific | Product-specific |
| Cage | Product-specific | Product-specific |
| Shield | Product-specific | Product-specific |
| Contact Design | Must be confirmed | Must be confirmed |
| Application | Must be confirmed | Must be confirmed |
Interchangeability
Is Every SR144 Bearing Interchangeable?
No. The SR144 base reference can identify a bearing family, but dental variants may differ in construction and intended application.
- Outer or inner-ring width
- Radial vs angular-contact design
- Steel vs ceramic rolling elements
- Cage material and geometry
- Shield or integral protection
- Flange, step, groove or ring extension
- Lubrication specification
- Front, rear or other assembly position
- Handpiece, turbine or cartridge version
Do not order from “SR144” alone when the existing bearing has suffix markings or special geometry.
Cross Reference
SR144 Cross References
Use the cross-reference page to compare documented alternative references. A shared family name does not establish equivalence.
Product / Supplier SKU
Keep the exact product or supplier SKU separate from the bearing designation.
Manufacturer / Supplier Reference
Record the original source and exact reference string before normalization.
Alternative / Historical Number
Treat documented alternatives separately from the primary product number.
Match Status
Confirm whether a reference is exact, alternative, partial or still requires application evidence.
Structured Data
Technical Information to Confirm for an SR144 Variant
Confirm variant-level data before comparing or ordering an SR144-based bearing.
Base Family
Full Bearing Number
Original and Normalized Number
ID / OD
Outer Width
Inner Width
Contact Design
Rolling-Element Material
Ring Material
Cage Material
Shield / Seal
Geometry
Lubrication
Bearing Position
Cross References
Compatibility Evidence
Related Product Categories
Explore SR144 by Application or Material
Use application pages when the handpiece type is known, or material pages when rolling-element material is part of the requirement.
Dental Turbine Bearings
Use this category when the primary requirement is a high-speed turbine or cartridge application.
Low-Speed Handpiece Bearings
Use this category for low-speed, contra-angle, motor, spindle and related applications where relevant.
Ceramic-Ball Dental Bearings
Browse the material category when ceramic rolling elements are part of the requirement.
Steel-Ball Dental Bearings
Browse the material category when steel rolling elements are part of the requirement.
Data Quality
Evidence to Confirm for SR144 Product Data
Use measured dimensions, preserved markings and supporting application evidence instead of relying on broad quality claims.
Dimensional Verification
Confirm ID, OD, outer width, inner-ring width and special geometry from product measurements or documented specifications.
Number and Suffix Recording
Preserve the original full number and source; keep any normalized comparison value separate.
Application Review
Confirm each variant against the exact handpiece, turbine, cartridge and bearing position only when supporting evidence exists.
B2B SR144 Supply
SR144 Bearing Support for Repair Shops and Distributors
Submit SR144 numbers, current supplier references, dimensions, handpiece models and required quantities for structured comparison and commercial review.
SR144 variant comparison
Original and normalized number
Dimension comparison
Suffix / reference review
Application evidence
Bulk RFQ / quantity lists
Original and normalized number
Dimension comparison
Suffix / reference review
Application evidence
Bulk RFQ / quantity lists
Common Questions
SR144 Bearing FAQ
What is an SR144 bearing?
SR144 is a miniature inch-series bearing designation used as a base reference. Dental SR144-based products can use additional suffixes, dimensions, shields, cages, contact designs and special geometry.
What are the dimensions of a standard SR144 bearing?
The base SR144 reference uses a nominal 0.1250-inch bore, 0.2500-inch outer diameter and approximately 0.0937-inch base open width, corresponding to approximately 3.175 × 6.35 × 2.38 mm. Dental variants should be measured and verified separately.
Are all SR144 bearings the same width?
No. The base reference has a standard open-bearing width, but SR144-based variants can use other widths, shield structures, ring extensions or special geometry.
Is every SR144 bearing interchangeable?
No. Variants may differ in contact design, rolling-element material, cage, shield, geometry, lubrication, bearing position and handpiece application.
What do SR144 bearing suffixes mean?
Suffixes can describe additional bearing characteristics, but their meanings can vary by manufacturer or numbering system. Keep the complete original number and source when decoding a bearing.
Are SR144 bearings available with steel and ceramic balls?
SR144-based dental variants may use different rolling-element materials. Confirm the complete SKU, construction and application rather than selecting from ball material alone.
Are there radial and angular-contact SR144 variants?
SR144-based dental products may use different contact designs. The base SR144 family designation alone does not identify the internal contact geometry.
How do I identify the correct SR144 dental bearing?
Use the complete bearing number where available, confirm dimensions and geometry, then review contact design, ball material, cage, shield, handpiece model, assembly version and bearing position.
Find the Correct SR144 Bearing Variant
Use the full bearing number, dimensions, geometry and handpiece application together. Do not treat the base SR144 designation as a complete compatibility specification.