Tapered Roller Bearings - TDI (Tapered Double Inner)

78251D/78537 bearing | Tapered Roller Bearings - TDI (Tapered Double Inner) Imperial

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Price：	enquiry
Model Number：	78251D/78537
Series：	2.6020 in66.091 mm
r - Cup Backface "To Clear" Radius²：	78000
Design Units：	0.090 in2.30 mm
Db - Cup Backface Backing Diameter：	Spacer shows standard nominal .01 radii, actual bearing may vary
da - Cone Frontface Backing Diameter：	Imperial

Series	78000
Cone Part Number	78251D
Cup Part Number	78537
Design Units	Imperial
Bearing Weight	9.5 lb4.3 Kg
Cage Type	Stamped Steel
Aa - Cage-Cone Backface Clearance	0 in0 mm
d - Bore	2.5000 in63.500 mm
D - Cup Outer Diameter	5.3750 in136.525 mm
B - Double Cone Width	2.5980 in65.989 mm
C - Cup Width	0.9260 in23.520 mm
T - Bearing Width across Cups	2.6020 in66.091 mm
R - Cone Frontface "To Clear" Radius¹	0.090 in2.30 mm
r - Cup Backface "To Clear" Radius²	0.130 in3.3 mm
da - Cone Frontface Backing Diameter	3.11 in78.90 mm
Db - Cup Backface Backing Diameter	4.53 in115.10 mm
Ab - Cage-Cone Frontface Clearance	0.08 in2 mm
C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)³	9970 lbf44300 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)⁴	66900 lbf298000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)⁵	17400 lbf77200 N
C_a90 - Dynamic Thrust Rating (90 million revolutions)⁶	14800 lbf65700 N
K - Factor⁷	0.67
e - ISO Factor⁸	0.87
Y1 - ISO Factor⁹	0.78
Y2 - ISO Factor¹⁰	1.16
G1 - Heat Generation Factor (Roller-Raceway)¹¹	62.6
G2 - Heat Generation Factor (Rib-Roller End)	19.1
Cg - Geometry Factor¹²	0.0884
Note	Spacer shows standard nominal .01 radii, actual bearing may vary

No.	Series	r - Cup Backface "To Clear" Radius²	Design Units	Db - Cup Backface Backing Diameter	da - Cone Frontface Backing Diameter	D - Cup Outer Diameter
OKCX 630	9200440630	2121.000	820.000	8110.000	630.000	1275.000
UKFCX08D1;H2308X	UKFCX08D1;H2308X	35	UKX08D1;H2308X	12.0	2.2	133
2320 M	4000	5600	80.000	190.000	2320 M	215.000
UCM212-50D1	UCM212-50D1	M10x1.25	60	25.4	UC212D1	28
H-E32205J	19.25	25	2CD	1.0	1.0	0.188
24192KYMBW886BC3	1.8	2.74	1.84	230	220	6.000 mm0.240 in
CF 20-1	119.00	20	1	4	8.0	34.0
LM 203242 F AJ	None	Stainless	LM 203242 F AJ	Stainless	20	-
HJ-607632 + IR-526032	2.5	HJ-607632 + IR-526032	2.000	4500	95.250	120.650
SRG15A1SS+160L (G20g20, PB107)	No connection	SRG15A	20.00	-	-	-

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