Tapered Roller Bearings - TDI (Tapered Double Inner)

78251D/78571 bearing | Tapered Roller Bearings - TDI (Tapered Double Inner) Imperial

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Price：	enquiry
Model Number：	78251D/78571
Series：	2.5616 in65.065 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	78571
Design Units	Imperial
Bearing Weight	10.8 lb4.9 Kg
Cage Type	Stamped Steel
Aa - Cage-Cone Backface Clearance	0 in0 mm
d - Bore	2.5000 in63.500 mm
D - Cup Outer Diameter	5.7080 in144.983 mm
B - Double Cone Width	2.5980 in65.989 mm
C - Cup Width	0.9058 in23.007 mm
T - Bearing Width across Cups	2.5616 in65.065 mm
R - Cone Frontface "To Clear" Radius¹	0.090 in2.30 mm
r - Cup Backface "To Clear" Radius²	0.140 in3.600 mm
da - Cone Frontface Backing Diameter	3.11 in78.90 mm
Db - Cup Backface Backing Diameter	4.65 in118.10 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
CRH 20VUU	103.0	19.050	1.588	2.381	4.762	24.209
NUKRE 52 A	4.250	36.000	29.700	52.000	NUKRE 52 A	24.000
ACS350-01U-09A8-2	200 - 240	2.2	3	R2	ACS350-01U-09A8-2	Single
NU2212ET &	HPS	60	1.5	1.5	1.5	1.5
QVVFY12V204S	4.25	2.86	15.0 lb6.8 Kg	0883450092944 0883450093613 0883450106238 0883450106429 0883450112529 0883450112710 0883450124461 08	0.0015 in0.038 mm	2-1/4 in
UCT208/24	5.5 lb2.5 Kg	087796077799	144.00 mm5.669 in	114.00 mm4.488 in	4002 lbf17800 N	33.00 mm1.299 in
LM503349R/10	18.000	45.987	2.40	LM503349R/10	6600	5000
ACS355-03U-24A4-2	200 - 240	5.5	7.5	R3	ACS355-03U-24A4-2	Three
24152EMBW33W45AW69C2	1.78	2.7	1.82	580	540	3.00 mm0.120 in
46T32317JR/108	137	85	3.0	46T32317JR/108	180	77.6

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