NDHQ20212DTL7Angular Contact Ball Bearing Tandem Duplex Set 60x110x22 mm ABEC-7 Light Preload Phenolic Separator

Product Description

What this part is

New Departure Hyatt Q20212DTL7 single-row angular contact ball bearing, 60 mm bore, 110 mm outside diameter, 22 mm width. Open on both faces, phenolic ball separator, faces flush ground for duplex tandem mounting.

Decoding the designation

Q – nonmetallic (phenolic) ball separator
20212 – New Departure 20200 angular contact series; bore code 12 = 60 mm; ISO 7212 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

What these specs mean in practice

Light preload is the lowest of the three NDH duplex classes — L light, X medium, T heavy. It holds shaft position and adds stiffness while keeping running torque, heat rise and cage load low, which is why light-preload sets go into the faster spindle positions. Tandem rows share thrust in one direction, roughly doubling one-direction axial capacity over a single bearing. ABEC-7 tightens bore, outside diameter, width and runout well beyond commercial ABEC-1 grade, which is what keeps spindle runout repeatable.

Published specifications

Bore: 60 mm (2.3622 in)
Outside diameter: 110 mm (4.3307 in)
Width, each bearing: 22 mm (0.8661 in)
Rows: 1 per bearing
Rolling element: ball
Closure: open
Precision class: ABEC-7
Preload: light (L)
Separator: phenolic
Arrangement: duplex tandem, universally ground

Quantity and configuration

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.

Fitting notes

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.

Interchange guidance

The 60 x 110 x 22 mm envelope matches the ISO 7212 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 New Departure Hyatt was a General Motors division and the line later passed through Delphi, so this designation is obsolete and is searched alongside its ISO number.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 separator material is a related size rather than an interchange.