Model datasheet
51203 Thrust Ball Bearing 17x35x12mm
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.
51203 bearing specifications
| Parameter | Value |
|---|---|
| Model | 51203 |
| Category | Thrust Ball Bearing |
| Series | 51200 Series |
| Inner Diameter (ID) | 17 mm |
| Outer Diameter (OD) | 35 mm |
| Width | 12 mm |
| Material | Chrome Steel GCr15 |
| Closure | Open |
| Dynamic Load | 16.0 kN |
| Static Load | 32.0 kN |
| Speed Limit | 6700 RPM |
| Precision | P0 (ABEC-1) |
| Clearance | CN (Standard) |
51203 brand designation references
Interchange Numbers: 51203
Catalogue designations reviewed for this model include SKF 51203, FAG 51203, NSK 51203, NTN 51203, Timken 51203.
These catalogue references have source records, but the complete suffix and operating requirement must still be confirmed.
| Brand | Brand designation | Reference status |
|---|---|---|
| SKF | 51203 | Source recorded SKF rolling bearing catalogue — 51203 · |
| FAG | 51203 | Source recorded Schaeffler FAG rolling bearing catalogue — 51203 · |
| NSK | 51203 | Source recorded NSK rolling bearing catalogue — 51203 · |
| NTN | 51203 | Source recorded NTN rolling bearing catalogue — 51203 · |
| Timken | 51203 | Source recorded Timken bearing catalogue — 51203 · |
Frequently asked questions about 51203
What does the open design mean on a 51203 bearing?
The 51203 (17mm x 35mm x 12mm) 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 51203 come with C3 clearance?
This directory lists the 51203 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 51203 is listed as a 17×35×12mm thrust ball bearing in open configuration. Part of the 51200 series, the directory records chrome steel gcr15 and P0 (ABEC-1) precision grade for RFQ verification.
The 51203 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.
Common Applications
- Vertical Shafts
- Hook Cranes
- Centrifugal Pumps
- Automotive
Common applications for 51203
The 51203 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 51203 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 |
| 51103 | 17mm x 30mm x 9mm | 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