389A/384EDTimkenTapered Roller

Name: Timken 389A/384ED Tapered Roller Bearing
Brand: Timken
SKU: 389A/384ED

389A/384ED is a Timken tapered roller bearing, bore 53.98 mm, O.D. 100 mm, height 49.2 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly

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Bore d53.98mm

Outside dia. D100mm

Overall width T49.2mm

Dynamic Cr188kN

Weight1.52kg

Mean dia. dm77mm

Original catalogue drawing - Timken TRB Catalog, page 528

389A/384ED Timken Tapered Roller bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

Symbol	Dimension	mm	inch
d	Bore diameter	53.975	2.125
D	Outside diameter	100	3.937
T	Overall assembly width	49.2	1.937
C	Cup / outer-ring width	39.675	1.562
r	Chamfer (min)	0.8	0.0315

Notes

Tapered roller bearings are cone / cup assemblies; cone and cup weights are listed separately and the total is their sum. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)	53.975
Bore d (in)	2.1250
Outside dia. D (mm)	100.000
Outside dia. D (in)	3.9370
Overall width T (mm)	49.200
Overall width T (in)	1.9370
Cup width C (mm)	39.675
Cup width C (in)	1.5620

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	42200
Basic dynamic load rating Cr (N)	188000
Dynamic rating C1 (N, ISO)	188000
Dynamic rating C1 (lbf, ISO)	42200
Radial rating C90 (N)	28000
Radial rating C90 (lbf)	6280
Thrust rating Ca90 (N)	16900
Thrust rating Ca90 (lbf)	3810
Factor e	0.35
Factor Y1	1.91
Factor Y2	2.84
Factor K	1.65
Geometry factor G1	42.0
Geometry factor G2	15.7
Geometry factor Cg	0.0859

Weight

Weight (kg)	1.52

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)	0.8
Housing fillet r max (mm)	0.8
Shaft shoulder db (mm)	61.0
Housing shoulder Da (mm)	93.0

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	47,000	102	3,386
6	31,333	392	13,083
8	23,500	1,024	34,133
10	18,800	2,154	71,814
15	12,533	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 188,000 N. Hours = L₁₀ x 10⁶ / (60n). Life-modification factors for lubrication, contamination and temperature (a_ISO) are not included.

Source & traceability

Brand	Timken
Source catalogue	Timken Tapered Roller Bearing Catalog (2016)
Catalogue page	p.528 (dimensions)
Series type	TDO

ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
389A/382	Timken	Tapered Roller	53.98	98.42	21.95	108 kN	0.69
389A/382A	Timken	Tapered Roller	53.98	96.84	21.95	108 kN	0.64
389A/384D	Timken	Tapered Roller	53.98	100	52.39	188 kN	1.6

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
33895/33821	Timken	Tapered Roller	53.98	95.25	28.57	130 kN	0.8
33895/33821D	Timken	Tapered Roller	53.98	95.25	63.5	226 kN	1.75
33895/33822	Timken	Tapered Roller	53.98	95.25	28.57	130 kN	0.81
39578/39520	Timken	Tapered Roller	53.98	112.71	30.16	167 kN	1.44
45287/45220	Timken	Tapered Roller	53.98	104.78	30.96	153 kN	1.16
45287/45221	Timken	Tapered Roller	53.98	104.78	30.96	153 kN	1.16
456/452	Timken	Tapered Roller	53.98	107.95	29.32	-	1.27
456/452A	Timken	Tapered Roller	53.98	107.95	29.32	161 kN	1.27

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