SR144TLZWN bearing overview
SR144TLZWN is listed in the current product catalog as a high-speed dental bearing with source P/N GS-B1. The same model card shows a 3.175 mm bore, 6.35 mm outside diameter and 2.78 mm width.
Verified source data
| Model | SR144TLZWN |
|---|---|
| Source P/N | GS-B1 |
| Product type | High-speed dental bearing |
| Bore / ID | 3.175 mm |
| Outer Diameter / OD | 6.35 mm |
| Width | 2.78 mm |
| Dimension order | ID × OD × Width |
| Precision marking | P4 |
| Source speed marking | RPM > 400000 |
The speed value above is retained as a source marking, not a maximum, rated or guaranteed assembled-handpiece speed. P4 is not converted to an ABEC class. The catalog material string is retained in the evidence record but is not split into component attributes without labeled component-level evidence.
Width and identity check
The verified width for GS-B1 is 2.78 mm. Do not select this bearing from bore and outside diameter alone: another SR144-family bearing may share the 3.175 mm ID and 6.35 mm OD while using a different width or construction. Compare the exact model marking, P/N, ID, OD, width, visible face configuration, outer-ring profile and removed-bearing photographs.
Use the dental bearing size chart for dimension lookup, the bearing model cross-reference for model and P/N navigation, or provide the available evidence through bearing identification. No handpiece-brand or rotor compatibility is established by the current card.
Related product guidance
Review the high-speed dental bearing guide and the SR144 bearing family guide for selection context. For sourcing assistance, contact us with the required quantity and identification details.
◎ Production-record Fitment
Based on internal factory production records (TIER_B evidence), SR144TLZWN has been manufactured for the following handpiece models. This is a production-record listing, not a guaranteed compatibility claim — physical verification against your specific handpiece is recommended before installation.
| Brand | Handpiece Models |
|---|---|
| W&H | ALEGRA TE-95, ALEGRA TE-96, 100 Mini, 700/800 Series, TREND TC-80BC/TC-95BC/TC-80 FG, TOPAIR/TOPLIGHT 100/700/800, Sabra 395/397 Sabra Trend, 196/896 198/898 Top air |
| Bien Air | BORA, BLACK PEARL, ORAZO, TDS 890 |
| Sirona | T2 / T3 |
Evidence: internal factory drawings (LGX-WH-02, LGX-KV-01, LGX-MW-01, etc.) + dental-bearing.com size cross-reference. Status: CORROBORATED (dual-source). ◎ = Production-record fitment.
◎ Production-record Fitment
Based on internal factory production records (TIER_B evidence), SR144TLZWN has been manufactured for the following handpiece models. This is a production-record listing, not a guaranteed compatibility claim — physical verification against your specific handpiece is recommended before installation.
| Brand | Handpiece Models |
|---|---|
| W&H | ALEGRA TE-95, ALEGRA TE-96, 100 Mini, 700/800 Series, TREND TC-80BC/TC-95BC/TC-80 FG, TOPAIR/TOPLIGHT 100/700/800, Sabra 395/397 Sabra Trend, 196/896 198/898 Top air |
| Bien Air | BORA, BLACK PEARL, ORAZO, TDS 890 |
| Sirona | T2 / T3 |
Evidence: internal factory drawings (LGX-WH-02, LGX-KV-01, LGX-MW-01, etc.) + dental-bearing.com size cross-reference. Status: CORROBORATED (dual-source). ◎ = Production-record fitment.
Specification Source and Limits
Product reference: GS-B1. Source: manufacturer product catalog supplied to DENTORQUE, page 4, panel R3C1.
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 GS-B1, page 4, panel R3C1. Read our fitment evidence standard before treating a candidate as a confirmed replacement.
