78215C/78549DTimkenTapered Roller

Name: Timken 78215C/78549D Tapered Roller Bearing
Brand: Timken
SKU: 78215C/78549D

78215C/78549D is a Timken tapered roller bearing, bore 53.98 mm, O.D. 139.7 mm, height 77.79 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly

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Bore d53.98mm

Outside dia. D139.7mm

Overall width T77.79mm

Dynamic Cr412kN

Weight5.81kg

Mean dia. dm96.8mm

Original catalogue drawing - Timken TRB Catalog, page 530

78215C/78549D 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	139.7	5.5
T	Overall assembly width	77.788	3.0625
C	Cup / outer-ring width	51.803	2.0395
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)	53.975
Bore d (in)	2.1250
Outside dia. D (mm)	139.700
Outside dia. D (in)	5.5000
Overall width T (mm)	77.788
Overall width T (in)	3.0625
Cup width C (mm)	51.803
Cup width C (in)	2.0395

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	92600
Basic dynamic load rating Cr (N)	412000
Dynamic rating C1 (N, ISO)	412000
Dynamic rating C1 (lbf, ISO)	92600
Radial rating C90 (N)	61300
Radial rating C90 (lbf)	13800
Thrust rating Ca90 (N)	90900
Thrust rating Ca90 (lbf)	20400
Factor e	0.87
Factor Y1	0.78
Factor Y2	1.16
Factor K	0.67
Geometry factor G1	71.3
Geometry factor G2	17.6
Geometry factor Cg	0.0926

Weight

Weight (kg)	5.81

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)	3.5
Housing fillet r max (mm)	1.5
Shaft shoulder db (mm)	84.0
Housing shoulder Da (mm)	131.0

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	103,000	102	3,386
6	68,667	392	13,083
8	51,500	1,024	34,133
10	41,200	2,154	71,814
15	27,467	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 412,000 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.530 (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
78215C/78537	Timken	Tapered Roller	53.98	136.53	33.24	237 kN	2.6
78215C/78551	Timken	Tapered Roller	53.98	140.03	33.24	237 kN	2.74

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
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
389A/384ED	Timken	Tapered Roller	53.98	100	49.2	188 kN	1.52
39578/39520	Timken	Tapered Roller	53.98	112.71	30.16	167 kN	1.44

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