Aircraft Bearings

Series in this line

Click any series concept below. For specific part numbers, dimensions and replacement references, send us your drawing or part number.

Single-Row Standard ⌄

SBO · RBO series

Model	d × D × B (mm)
DPP3FS464	0.19×0.78×0.495RBC DPP3FS464
DPP4FS428	0.25×0.9×0.62RBC DPP4FS428
DPP4FS464	0.25×0.9×0.62RBC DPP4FS464
DPP4WFS464	0.25×0.9×0.62RBC DPP4WFS464
DPP5FS428	0.31×1.25×0.745RBC DPP5FS428
DPP5FS464	0.31×1.25×0.745RBC DPP5FS464
DPP6FS428	0.38×1.44×0.87RBC DPP6FS428
DPP6FS464	0.38×1.44×0.87RBC DPP6FS464

85 models in this series · Request a quote →

General airframe control applications. Spherical bore or flat bore, sealed or open. Compatible with RBC A- series references.

Single-Row Precision ⌄

ABEC-5+ · P5+

Model	d × D × B (mm)
DPP3FS464	0.19×0.78×0.495RBC DPP3FS464
DPP4FS428	0.25×0.9×0.62RBC DPP4FS428
DPP4FS464	0.25×0.9×0.62RBC DPP4FS464
DPP4WFS464	0.25×0.9×0.62RBC DPP4WFS464
DPP5FS428	0.31×1.25×0.745RBC DPP5FS428
DPP5FS464	0.31×1.25×0.745RBC DPP5FS464
DPP6FS428	0.38×1.44×0.87RBC DPP6FS428
DPP6FS464	0.38×1.44×0.87RBC DPP6FS464

24 models in this series · Request a quote →

High-precision controls, instruments and antenna mechanisms. Tighter tolerances on raceway geometry and runout.

Double-Row Standard ⌄

DW series · includes DW4K

Model	d × D × B (mm)
DW4	6.35×19.05×22.225
DW4K	6.35×19.05×22.225
DW4K2	6.35×15.875×14.275
DW5	8.001×22.225×23.813
DW6	9.525×26.988×30.163
DW8	12.7×36.513×38.1
KP3	4.826×19.66×7.544
KP3A	4.826×15.875×7.544

38 models in this series · Request a quote →

Heavier-load control applications. DW4K is the flagship double-row standard type — the most-searched aircraft control bearing. Two rows of balls in back-to-back arrangement handle combined loads in both directions.

Cold soak test of aircraft control bearings at minus 55 Celsius — Cold soak verification — bearings tested at −55 °C for low-temperature service

Double-Row Precision ⌄

ABEC-5+ · DW series precision grade

Model	d × D × B (mm)
GDW4K2FS428	0.25×0.63×0.562RBC GDW4K2FS428
GDW4KFS428	0.25×0.75×0.875RBC GDW4KFS428
GDW4KFS464	0.25×0.75×0.875RBC GDW4KFS464
GDW5FS428	0.31×0.88×0.938RBC GDW5FS428
GDW6FS428	0.38×1.06×1.188RBC GDW6FS428
GDW6FS464	0.38×1.06×1.188RBC GDW6FS464
MDW4K2FS428	0.25×0.63×0.562RBC MDW4K2FS428
MDW4K2FS464	0.25×0.63×0.562RBC MDW4K2FS464

11 models in this series · Request a quote →

Precision version of the DW double-row type. For critical flight control systems where runout and play must be minimized.

Roller Bearings ⌄

Cylindrical · Tapered · Needle

Model	d × D × B (mm)
KP10AFS428	0.63×1.38×0.406RBC KP10AFS428
KP10AFS464	0.63×1.38×0.406RBC KP10AFS464
KP12AA2365	0.75×1.63×0.437RBC KP12AA2365
KP12AFS428	0.75×1.63×0.437RBC KP12AFS428
KP12AFS464	0.75×1.63×0.437RBC KP12AFS464
KP16AFS428	1×2×0.5RBC KP16AFS428
KP16AFS464	1×2×0.5RBC KP16AFS464
KP20AFS428	1.25×2.25×0.5RBC KP20AFS428

111 models in this series · Request a quote →

Landing gear, track and high-shock-load applications where point contact of ball bearings is insufficient. Roller contact handles heavier radial loads.

Radials (6 sub-categories)⌄

Full RBC-compatible range

Six radial bearing sub-categories covering the full RBC airframe catalog: thin-section, groove, instrument, miniature, stainless and special-duty. We declare compatible references — not authorized.

Model	d × D × B (mm)
200KTT	0.39×1.18×0.656RBC 200KTT
36KLL	0.24×0.75×0.562RBC 36KLL
38KLL2	0.32×0.87×0.497RBC 38KLL2
38KTD	0.32×0.87×0.406RBC 38KTD
38KTT	0.32×0.87×0.5625RBC 38KTT
39K4	0.38×1.02×0.315RBC 39K4
39KDD4	0.38×1.02×0.315RBC 39KDD4
7201K	0.47×1.26×0.3937RBC 7201K

24 models in this series · Request a quote →

DW4K explained

DW4K is NLHB's designation for the double-row standard aircraft control bearing — the most commonly sourced type. It belongs to the DW series (double-row standard), not a separate category. When you see "DW4K" in an RBC or competitor catalog, it maps to our Double-Row Standard series. DW4K2, DW4KX and similar suffixes are precision or variant grades within the same series.

RBC is a trademark of RBC Bearings Incorporated. References shown for compatibility only — not authorized or affiliated.

Available options (confirmed per inquiry)

Precision: ABEC-5+ available
Material: Vacuum-degassed steel
Sourcing: Compatible references declared, not authorized

Specific configurations are confirmed per quotation. We do not claim every option is in stock for every model — we verify before quoting.