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Single-row angular contact ball bearing, 85 x 150 x 28 mm, open, phenolic separator, duplex tandem set, light preload, ABEC-7.
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| MFR / Brand | NDH |
|---|---|
| MPN | Q20217DTL7A |
| Model | Q 20217 DT L7A / 7217 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 85 mm |
| OD | 150 mm |
| Width | 28 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Condition | New |
| Preload | Universal |
| Base Number | 20217 |
| Industry Terms | duplex tandem pair, matched set angular contact, spindle bearing, phenolic cage bearing, universally ground bearing |
| Common Misspellings | Q20217DTL7A, Q20217 DTL 7A, NDH Q-20217-DT-L-7-A, New Departure Q20217DTL7A, Departure 20217 |
| Application Types | Machine tool spindles, precision gearbox thrust positions, pump and compressor thrust ends |
| Total Width | 56 mm (2.2047 in) for a tandem pair |
| Bore Shaft Size | 85 mm (3.3465 in) |
| Mpn Variants | Q20217DTL7A, Q-20217-DT-L7-A, Q 20217 DTL 7A, Q20217DTL7, 20217DTL7A, 20217 |
| Manufacturer Status | Obsolete. New Departure Hyatt was a General Motors division; the bearing line passed through Delphi and this designation is no longer produced. |
| Arrangement Configuration | Duplex tandem (DT), universally ground for DT / DB / DF |
| Precision Class | ABEC-7 |
| Additional Attributes | Rust-preventive slush per the A suffix |
| Min Temp | -40 °C |
| Cage Type | Phenolic |
| Dynamic Load Rating | 88 kN |
| Static Load Rating | 75 kN |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 4.60 lbs |
| Cage Material | Phenolic |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Mounting Arrangement | Universal |
| Design Units | Metric |
| Internal Clearance | CN |
| Part Number | Q20217DTL7A |
| Cross Reference 1 | ISO 7217 (same 85x150x28 mm envelope) |
|---|---|
| Cross Reference 2 | Fafnir 2MM217WI |
| Cross Reference 3 | NSK 7217CTYNSULP4 |
New Departure Hyatt Q20217DTL7A single-row angular contact ball bearing, 85 mm bore, 150 mm outside diameter, 28 mm width. Open on both faces, phenolic ball separator, faces flush ground for duplex tandem mounting.
Q – nonmetallic (phenolic) ball separator
20217 – New Departure 20200 angular contact series; bore code 17 = 85 mm; ISO 7217 dimensional envelope
DT – duplex tandem set, all faces flush ground to preload requirement for universal mounting in tandem, back-to-back or face-to-face
L – light preload
7 – ABEC-7 tolerance class
A – rust-preventive slush
Light preload is the lowest of the three NDH duplex classes — L light, X medium, T heavy — and it favours speed and low heat rise over maximum stiffness. Tandem rows take thrust in the same direction and share it, roughly doubling one-direction axial capacity over a single bearing. ABEC-7 is the precision grade used in machine tool spindle positions, holding bore, outside diameter, width and ring runout far tighter than commercial ABEC-1 stock.
Bore: 85 mm (3.3465 in)
Outside diameter: 150 mm (5.9055 in)
Width, each bearing: 28 mm (1.1024 in)
Rows: 1 per bearing
Rolling element: ball
Closure: open
Precision class: ABEC-7
Preload: light (L)
Separator: phenolic
Arrangement: duplex tandem, universally ground
Supplied as a matched set of single-row bearings, not a double-row bearing. Each bearing is a separate part and the grind is what pairs them.
Match marks on the ring faces are aligned as ground when the set is stacked. Shaft and housing seats are held to the tolerance grade of the bearing, and clamp load passes through the ring faces rather than the separator. Preload comes from the flush-ground faces once the rings are clamped solid.
The 85 x 150 x 28 mm envelope matches the ISO 7217 series. New Departure Hyatt was a General Motors division and the line later passed through Delphi, so this designation is obsolete and is searched alongside its ISO number. A same-envelope bearing built to a different contact angle, preload class or tolerance grade is a related size rather than an interchange.
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