NA43131/43319DTimkenTapered Roller

Name: Timken NA43131/43319D Tapered Roller Bearing
Brand: Timken
SKU: NA43131/43319D

NA43131/43319D is a Timken tapered roller bearing, bore 33.34 mm, O.D. 80.96 mm, height 55.56 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly

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Bore d33.34mm

Outside dia. D80.96mm

Overall width T55.56mm

Dynamic Cr135kN

Weight1.28kg

Mean dia. dm57.1mm

Original catalogue drawing - Timken TRB Catalog, page 650

NA43131/43319D 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	33.337	1.3125
D	Outside diameter	80.962	3.1875
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)	33.337
Bore d (in)	1.3125
Outside dia. D (mm)	80.962
Outside dia. D (in)	3.1875
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)	30400
Basic dynamic load rating Cr (N)	135000
Dynamic rating C1 (N, ISO)	135000
Dynamic rating C1 (lbf, ISO)	30400
Radial rating C90 (N)	20100
Radial rating C90 (lbf)	4520
Thrust rating Ca90 (N)	23000
Thrust rating Ca90 (lbf)	5170
Factor e	0.67
Factor Y1	1.01
Factor Y2	1.50
Factor K	0.87

Weight

Weight (kg)	1.28

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)	2.3
Housing fillet r max (mm)	1.5
Shaft shoulder db (mm)	48.5
Housing shoulder Da (mm)	74.0

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	33,750	102	3,386
6	22,500	392	13,083
8	16,875	1,024	34,133
10	13,500	2,154	71,814
15	9,000	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 135,000 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
43131/43319D	Timken	Tapered Roller	33.34	80.96	55.56	160 kN	1.27
43132/43319D	Timken	Tapered Roller	33.34	80.96	55.56	160 kN	1.27

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
16131/16284	Timken	Tapered Roller	33.34	72.24	20.64	56.6 kN	0.39
16582/16522	Timken	Tapered Roller	33.34	68.26	22.23	66.7 kN	0.38
1680/1620	Timken	Tapered Roller	33.34	66.67	20.64	52.5 kN	0.31
2581/2523	Timken	Tapered Roller	33.34	69.85	25.36	83.7 kN	0.44
2581/2523-S	Timken	Tapered Roller	33.34	69.85	25.36	83.7 kN	0.44
2585/2520	Timken	Tapered Roller	33.34	66.42	25.36	83.7 kN	0.39
2585/2523	Timken	Tapered Roller	33.34	69.85	25.36	83.7 kN	0.44
2585/2523-S	Timken	Tapered Roller	33.34	69.85	25.36	83.7 kN	0.44

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