Model datasheet
51103 Thrust Ball Bearing 17x30x9mm
Confirm the model number, dimensions, suffix, and replacement notes before sending a quotation request for repair or MRO sourcing.
Verified directory reference: Specifications have been reviewed, but the complete suffix and current order requirement must still be confirmed before purchase.
51103 bearing specifications
| Parameter | Value |
|---|---|
| Model | 51103 |
| Category | Thrust Ball Bearing |
| Series | 51100 Series |
| Inner Diameter (ID) | 17 mm |
| Outer Diameter (OD) | 30 mm |
| Width | 9 mm |
| Material | Chrome Steel GCr15 |
| Closure | Open |
| Dynamic Load | 10.6 kN |
| Static Load | 24.5 kN |
| Speed Limit | 7000 RPM |
| Precision | P0 (ABEC-1) |
| Clearance | CN (Standard) |
51103 brand designation references
Interchange Numbers: 51103
Catalogue designations reviewed for this model include SKF 51103, FAG 51103, NSK 51103, NTN 51103, Timken 51103.
These catalogue references have source records, but the complete suffix and operating requirement must still be confirmed.
| Brand | Brand designation | Reference status |
|---|---|---|
| SKF | 51103 | Source recorded SKF rolling bearing catalogue — 51103 · |
| FAG | 51103 | Source recorded Schaeffler FAG rolling bearing catalogue — 51103 · |
| NSK | 51103 | Source recorded NSK rolling bearing catalogue — 51103 · |
| NTN | 51103 | Source recorded NTN rolling bearing catalogue — 51103 · |
| Timken | 51103 | Source recorded Timken bearing catalogue — 51103 · |
Frequently asked questions about 51103
What does the open design mean on a 51103 bearing?
The 51103 (17mm x 30mm x 9mm) is supplied open — without seals or shields — so lubrication and relubrication come from the surrounding housing or an external system. Compare seal types before deciding on the replacement.
Does the 51103 come with C3 clearance?
This directory lists the 51103 with CN (Standard). C3 (increased internal clearance) versions are common for higher operating temperatures, higher speeds, or press-fit arrangements — specify the required clearance on your RFQ so the quotation matches the application. Read the clearance guide.
The 51103 is listed as a 17×30×9mm thrust ball bearing in open configuration. Part of the 51100 series, the directory records chrome steel gcr15 and P0 (ABEC-1) precision grade for RFQ verification.
The 51103 uses the same part number designation across SKF, FAG, NSK, NTN, and Timken catalogs. This is a standardized thrust ball bearing with industry-standard boundary dimensions. Confirm the housing style, shaft diameter, and seal type before ordering a replacement.
About the 51100 Series
The 51100 series is a single direction thrust ball bearing designed for pure axial loads. The separable design (shaft washer, housing washer, ball/cage assembly) handles axial forces in one direction only. Used in automotive transmissions, machine tool spindles, and vertical pump shafts.
Common Applications
- Vertical Shafts
- Hook Cranes
- Centrifugal Pumps
- Automotive
Common applications for 51103
The 51103 is a common replacement candidate in the following equipment. Open the application guide to confirm the checks that apply to your machine before ordering:
Compare 51103 with nearby sizes
These models are the closest sizes in the same bearing family. They are not interchangeable — confirm the bore, outside diameter, and width before replacing the existing part.
| Model | Dimensions | Closure | Action |
|---|---|---|---|
| 51102 | 15mm x 28mm x 9mm | Open | View specifications |
| 51202 | 15mm x 32mm x 12mm | Open | View specifications |
| 51203 | 17mm x 35mm x 12mm | Open | View specifications |
| 51104 | 20mm x 35mm x 10mm | Open | View specifications |
| 51204 | 20mm x 40mm x 14mm | Open | View specifications |
Fast bearing RFQ
Tell us what bearing you need.
A model number is enough to start. If the marking is unclear, send the dimensions, application, or a shared photo link in the message.
- Small repair quantities and mixed model lists
- Model, suffix, and replacement review
- Price, lead time, packing, and shipping details