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Central Surplus Bearing Finder
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NDH QH20309DTT7A angular contact ball bearing, 45 x 100 x 25 mm, 25°, ABEC 7, phenolic cage, duplex tandem heavy preload. 4 pieces, ISO 7309 size.
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| MFR / Brand | NDH |
|---|---|
| MPN | QH20309DTT7A |
| Model | Q H 20309 DT T7A / 7309ACD 7309 E T TUL P4 7309A5 |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 45 mm |
| OD | 100 mm |
| Width | 25 mm |
| Base Number | 20309 |
|---|---|
| Industry Terms | angular contact bearing, super precision bearing, spindle bearing, matched set, duplex bearing |
| Common Misspellings | QH20309DTT7, QH 20309 DTT7A, 7309E, 7309ACD, 7309A5 |
| Application Types | machine tool spindles, high-speed spindles, precision gearboxes |
| Overall Width | 25 mm |
| Mpn Variants | QH20309DTT7A, Q-H-20309-DT-T7A, Q H 20309 DT T7A, QH20309DT, 20309 |
| Precision Class | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Contact Angle | 25° |
| Preload | Heavy |
| Mounting Arrangement | Tandem (DT) |
| Cross Reference 1 | SKF 7309 ACD/P4 - single, not DT heavy set |
|---|---|
| Cross Reference 2 | FAG B7309-E-T-P4S - single, not DT heavy set |
NDH QH20309DTT7A super-precision angular contact ball bearing, ISO 7309 size, ground for duplex tandem mounting with heavy preload.
Q — phenolic separator.
H — 25° contact angle.
20309 — NDH’s number for the ISO 7309 size, 45 x 100 x 25 mm.
DT — duplex tandem. Bearings ground as a matched set, mounted facing the same direction. Not a double-row bearing.
T — heavy preload.
7 — ABEC 7 tolerance class.
Bore Diameter: 45 mm. Outside Diameter: 100 mm. Overall Width: 25 mm. Contact Angle: 25°. Cage Material: Phenolic. Precision Class: ABEC 7 / P4. Preload: Heavy. Mounting Arrangement: Tandem (DT). The 25° angle carries combined radial and one-direction axial load; tandem mounting shares the axial load across the set.
Unit Quantity: 4 Pcs.
Single-bearing cross-references in the ISO 7309 25° super-precision size: SKF 7309 ACD/P4, FAG B7309-E-T-P4S. These are singles; a tandem heavy-preload set is ordered with the matching set suffix.
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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