Product specifications
| Model | SMR74zz |
| Part Number | DS-4D |
| ID×OD×width | 4×7×2.5 mm |
| Shields | 2 shields |
How to select this bearing
DS low-speed 4mm bore group + 440C Stainless Steel balls + double shields + 兄弟件号 DS-4A, DS-4B, DS-4E
Specification Source and Limits
Product reference: DS-4D. Source: manufacturer product catalog supplied to DENTORQUE, page 9, panel R3C4.
The source file is titled 轴承2026产品资料.pdf. A controlled revision and publication date are not stated in the supplied catalog; the year in its filename is not an issue-date verification.
Catalog markings are source information, not an independent test report or confirmation of compatibility with a specific handpiece. Exact geometry, assembly version and operating requirements still need to be confirmed for your application.
For questions about this source, contact DENTORQUE and quote DS-4D, page 9, panel R3C4. Read our fitment evidence standard before treating a candidate as a confirmed replacement.
