Product specifications
| Model | DM-1040 |
|---|---|
| Part Number | DM-1040 |
| ID × OD × width | 4×10×4 mm (0.1575×0.3937×0.1575 in) |
| Configuration | Radial |
| Shields | Open (no shield) |
| Ball material | 440C Stainless Steel |
| Precision marking | P4 |
| Catalog speed marking | >400,000 RPM |
How to select this bearing
Dental micro motor bearings support the motor spindle inside the motor body rather than inside a handpiece head, so the load and speed profile differs from both turbine and low-speed head bearings. The DM series covers the common micro motor sizes; matching is done on measured ID x OD x width.
Within the DM series the selection is dimensional: pick the P/N whose ID x OD x width matches the bearing being replaced, and note the shield setup so the replacement mirrors the original.
This variant combines 440C Stainless Steel balls and an open (unshielded) configuration. It carries the catalog speed marking > 400,000 RPM shown in the table. Other P/Ns in the same size group: P/N DM-1030 (440C Stainless Steel balls); P/N DM-1360 (440C Stainless Steel balls); P/N DM-1370 (440C Stainless Steel balls).
For a quotation, provide the P/N and quantity. Availability and configuration will be confirmed on inquiry.
Specification Source and Limits
Product reference: DM-1040. Source: manufacturer product catalog supplied to DENTORQUE, page 11, panel R2C1.
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 DM-1040, page 11, panel R2C1. Read our fitment evidence standard before treating a candidate as a confirmed replacement.
