SMR74 is listed as a low-speed dental handpiece bearing under H&Q P/N DS-4C. Its current verified dimensions are 4 mm × 7 mm × 2 mm in ID × OD × Width order.
Verified Specifications
| Model | SMR74 |
|---|---|
| H&Q P/N | DS-4C |
| Product type | low-speed dental handpiece bearing |
| Bore / ID | 4 mm |
| Outer Diameter / OD | 7 mm |
| Width | 2 mm |
| Precision Grade | P4 |
| Source speed marking | >80,000 RPM |
What Distinguishes SMR74
The verified size record for SMR74 is 4 mm × 7 mm × 2 mm in ID × OD × Width order. Current model-level evidence does not map ball material, cage material, shield configuration or outer-ring profile, so those component fields remain intentionally omitted.
Verified data gap: component-level material and construction fields are not stated because the current source does not map them to this SKU.
Identification Before Ordering
Confirm the exact SMR74 marking, H&Q P/N DS-4C, Bore / ID, Outer Diameter / OD and width. Also compare the shield or open configuration and any flange, groove or step visible on the removed bearing. A shared dimension does not establish interchangeability. Compatibility must be confirmed for the exact handpiece and turbine or assembly version.
Information to Send for RFQ Review
Send clear front, side and marking photos of the removed bearing, the measured ID, OD and width, and the rotor, turbine or assembly reference when available. H&Q can then review the submitted information for identification and quotation.
Technical resources: dental bearing products, low-speed bearing hub, bearing size chart, bearing cross-reference and bearing identification.
Request Bearing Identification or a Technical Quote
No specific handpiece compatibility is claimed on this page. Confirm fit from the exact model, dimensions and construction evidence before ordering.
