NA44143/44363DTimkenTapered Roller

Name: Timken NA44143/44363D Tapered Roller Bearing
Brand: Timken
SKU: NA44143/44363D

NA44143/44363D is a Timken tapered roller bearing, bore 36.51 mm, O.D. 92.08 mm, height 55.56 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly

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Bore d36.51mm

Outside dia. D92.08mm

Overall width T55.56mm

Dynamic Cr147kN

Weight1.73kg

Mean dia. dm64.3mm

Original catalogue drawing - Timken TRB Catalog, page 650

NA44143/44363D 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	36.512	1.4375
D	Outside diameter	92.075	3.625
T	Overall assembly width	55.562	2.1875
C	Cup / outer-ring width	39.688	1.5625
r	Chamfer (min)	1.5	0.0591

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)	36.512
Bore d (in)	1.4375
Outside dia. D (mm)	92.075
Outside dia. D (in)	3.6250
Overall width T (mm)	55.562
Overall width T (in)	2.1875
Cup width C (mm)	39.688
Cup width C (in)	1.5625

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	32900
Basic dynamic load rating Cr (N)	147000
Dynamic rating C1 (N, ISO)	147000
Dynamic rating C1 (lbf, ISO)	32900
Radial rating C90 (N)	25900
Radial rating C90 (lbf)	5810
Thrust rating Ca90 (N)	34600
Thrust rating Ca90 (lbf)	7770
Factor e	0.78
Factor Y1	0.86
Factor Y2	1.29
Factor K	0.75

Weight

Weight (kg)	1.73

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)	0.8
Housing fillet r max (mm)	1.5
Shaft shoulder db (mm)	51.0
Housing shoulder Da (mm)	85.0

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	36,750	102	3,386
6	24,500	392	13,083
8	18,375	1,024	34,133
10	14,700	2,154	71,814
15	9,800	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 147,000 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.650 (dimensions)
Series type	TNA

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

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
44143/44363D	Timken	Tapered Roller	36.51	92.08	55.56	174 kN	1.72

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
13682/13620	Timken	Tapered Roller	36.51	69.01	19.05	-	0.3
13682/13621	Timken	Tapered Roller	36.51	69.01	19.05	67.2 kN	0.29
16143/16282	Timken	Tapered Roller	36.51	72	20.64	56.6 kN	0.34
16143/16284	Timken	Tapered Roller	36.51	72.24	20.64	56.6 kN	0.36
19143/19262	Timken	Tapered Roller	36.51	66.67	16.52	-	0.24
19143/19268	Timken	Tapered Roller	36.51	68.26	16.52	50.7 kN	0.25
19143/19283	Timken	Tapered Roller	36.51	72	16.52	50.7 kN	0.31
19143/19283X	Timken	Tapered Roller	36.51	72	16.52	50.7 kN	0.31

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