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Gearmotors: What They Are and How to Size a Replacement
Many industrial loads need torque an electric motor can’t deliver on its own, at a
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NDH Q30210DTT7A precision angular contact ball bearing pair, 50 x 90 x 20 mm ISO 7210 size, ABEC 7, heavy preload, duplex tandem. Phenolic separator, 2 Pcs.
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| MFR / Brand | NDH |
|---|---|
| MPN | Q30210DTT7A |
| Model | Q-30210-DTT-7A |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 50 mm |
| OD | 90 mm |
| Width | 20 mm |
| Precision Rating | ABEC 7 / P4 |
|---|---|
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50.28 |
| Mounting Arrangement | Duplex tandem (DT) |
| Base Number | 30210 |
| Industry Terms | precision angular contact bearing, spindle bearing, duplex tandem set, New Departure Hyatt |
| Application Types | Machine tool spindles, precision shafts |
| Mpn Variants | Q30210DTT7A, Q-30210-DTT-7A, Q 30210 DTT 7A, 30210, 7210 B |
| Precision Class | ABEC 7 / P4 |
| Additional Attributes | Duplex tandem matched pair; heavy preload; ABEC 7 tolerance; phenolic ball separator |
| Preload | Heavy |
| Common Misspellings | NDH Q30210 DTT7A; Q30210DTT 7A; N D H Q30210DTT7A; New Departure Q30210DTT7A |
| Closure Type | Open |
NDH (New Departure Hyatt) Q30210DTT7A precision angular contact ball bearing, supplied as a duplex tandem matched pair. Bore: 50 mm. Outside Diameter: 90 mm. Width: 20 mm per bearing. Unit Quantity: 2 Pcs.
Q — phenolic ball separator.
30210 — NDH number for the ISO 7210 size, 50 x 90 x 20 mm.
DT — duplex tandem. Two single-row bearings ground as a matched set, mounted facing the same direction.
T — heavy preload.
7 — ABEC 7 tolerance.
Bore Diameter: 50 mm. Outside Diameter: 90 mm. Overall Width: 20 mm per bearing. Precision Class: ABEC 7 / P4. Preload: heavy. Cage Material: phenolic. Mounting Arrangement: duplex tandem (DT). Rolling Elements: ball. Number Of Rows: 1 per bearing. Bore Type: straight. Closure Type: open.
ISO 7210 envelope, 50 x 90 x 20 mm per bearing. The pair is ground as a tandem set, both bearings facing the same direction.
Carton designation: 7210 B. Searchable variants of the number: Q30210DTT7A, Q-30210-DTT-7A, Q 30210 DTT 7A, 30210.
A New Departure Hyatt ABEC 7 angular contact ball bearing pair in the ISO 7210 size, heavy preload, duplex tandem, with a phenolic separator.
Bore 50 mm, outside diameter 90 mm, width 20 mm per bearing.
DT is a duplex tandem matched set, T is heavy preload and 7 is ABEC 7 tolerance.
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