78/5 KOYO Single-row, matched pair angular contact ball bearings

Reference speed	7000 r/min
B	23 mm
da min.	54.2 mm
Basic dynamic load rating C	98 kN
d2 ≈	61.9 mm
da max.	61.9 mm
D1 ≈	79.4 mm
Da min.	76.7 mm
Mass bearing + sleeve	0.72 kg
G1	7 mm
ra max.	1 mm
r1,2 min.	1.1 mm
B1	35 mm
s1 max.	7.1 mm
Operating clearance factor k2	0.128
Basic static load rating C0	100 kN
B2 ≈	38 mm
Misalignment factor k1	0.097
D	90 mm
Limiting speed	9500 r/min

78/5 KOYO Single-row, matched pair angular contact ball bearings cross reference by manufacturer
No.	Brand	T	a	B	C	d	R	r	D
78/500	NTN	-	-	56,000 mm	56,000 mm	500,000 mm	-	-	620,000 mm
545112-30178/545141-30178	TIMKEN	-	-	-	-	11.25 Inch \| 285.75 Millimeter	-	-	14.125 Inch \| 358.775 Millimeter
53178/53377	SKF	30.958 mm	30.006 mm	28.3 mm	20.638 mm	44.45 mm	-	-	95.25 mm
578/572	Timken	36,512 mm	-	36,098 mm	28,575 mm	79,985 mm	3,5 mm	3,3 mm	139,992 mm
578/572D+X1S-578	Timken	82,55 mm	-	-	66,675 mm	79,985 mm	3,5 mm	0,8 mm	139,992 mm
5578/5535	Timken	43,658 mm	-	43,764 mm	36,512 mm	53,975 mm	3,6 mm	3,3 mm	122,238 mm
53178/53375	Timken	30,958 mm	-	28,301 mm	20,638 mm	44,45 mm	2 mm	0,8 mm	95,25 mm
53178/53376D+X2S-53176	Timken	65,088 mm	-	-	44,45 mm	44,45 mm	2 mm	0,8 mm	95,25 mm
53178/53377/Q	SKF	30.958 mm	30 mm	28.3 mm	20.638 mm	44.45 mm	-	-	95.25 mm
4T-578/572D+A	NTN	82,55 mm	-	-	-	79,985 mm	-	-	139,992 mm
4T-578/572DC+A	NTN	82,55 mm	-	-	-	79,985 mm	-	-	139,992 mm

NN314 KOYO Double-row cylindrical roller bearings	Accessories:One Shield & Snap-Ri; B:19.00 mm; Oil Speed Rating Open/Shielded n2:11000 rpm; d:20.000 mm; Grease Speed Rating Open/Shielded n1:9000 rpm; Basic Dynamic Radial Load Rating C:29200 N; Fillet Radius ra:1.00 mm; D:72.0000 mm; Basic Static Radial Load Rating Co:18600 N;
NNU4938 KOYO Double-row cylindrical roller bearings	D:170 mm; Tolerance shaft:e7; Permissible sliding velocity v max.:0.5 m/s; Coefficient of friction µ max.:0.15; h:152 mm; Permissible sliding velocity v min.:0 m/s; Specific dynamic load factor K:25 N/mm²; d:150 mm; α:124 °; Coefficient of friction µ min.:0.08; Mass bushing:10.5
NN304 KOYO Double-row cylindrical roller bearings	Availability:In Stock; Static Load Rating (kN):325; B:44mm; Fatigue Load Rating (kN):34.5; Seals or Shields:Two Rubber Seals; Dynamic Load Rating (kN):285; D:150mm; d:85mm; Weight:3.00 KGS; SKU:bs2-2217-2rsk/vt143-; Clearance:Standard; Cage Type:Steel; Limiting Speed Rating (r/min):1100;
NNU494 KOYO Double-row cylindrical roller bearings	R2:21.431 mm; P180°:40 kN; Ca:37.008 mm; H1:82.55 mm; R1:46.038 mm; A1:79.375 mm; J min.:219.075 mm; P60°:104 kN; Initial grease fill:68.04 g; Cap bolt recommended tightening torque:149.1 N·m; Da:130 mm; A2:120.65 mm; L:285.75 mm; Max. speed for PosiTrac Plus seal:2350 r/min; Pa:6.94
NNU4932 KOYO Double-row cylindrical roller bearings	D:160 mm; Roller and cage thrust assembly:K 81222 TN; Eb:152 mm; Ea:117 mm; Mass roller and cage thrust assembly:0.53 kg; Fatigue load limit Pu:98 kN; Dw:15 mm; d:110 mm; Basic dynamic load rating C:260 kN; Basic static load rating C0:1000 kN; Limiting speed:1700 r/min; Reference speed:850 r/min;
NN3038 KOYO Double-row cylindrical roller bearings	Da max.:299 mm; d2 ≈:228 mm; Basic dynamic load rating C:1630 kN; da min.:211 mm; Limiting speed:260 r/min; ra max.:2 mm; D1 ≈:280 mm; Basic static load rating C0:2650 kN; da max.:263 mm; r1,2 min.:2.1 mm; D:310 mm; Fatigue load limit Pu:236 kN; s2 max.:11.1 mm; s1 max.:21 mm; Operating
NNU4934 KOYO Double-row cylindrical roller bearings	Clearance:Standard; d:80mm; Seals or Shields:Open Type; SKU:3216-b-tvh-fag; Dynamic Load Rating (kN):98; Fatigue Load Rating (kN):4.95; D:140mm; Limiting Speed Rating (r/min):4000; Availability:In Stock; Weight:2.45 KGS; Static Load Rating (kN):93; Cage Type:Plastic; Reference Speed Rating (r/min):5
NN3036 KOYO Double-row cylindrical roller bearings	P90°:149 kN; Eye bolt:2 x 3/8-16 UNC; Cap bolt:5/8-11 UNC; S:4.763 mm; ba:53.181 mm; A2:190.5 mm; PG:1/4 NPT; h:46.831 mm; PosiTrac Plus contact element:2 x B10724-113; P120°:94.3 kN; Cap bolt, SAE grade:8; Labyrinth ring:2 x LOR 112; P150°:87.2 kN; Cap bolt recommended tightening torque
NN3032 KOYO Double-row cylindrical roller bearings	Basic Static Radial Load Rating Co:10000 N; Oil Speed Rating Open/Shielded n2:13000 rpm; Fillet Radius ra:0.64 mm; Sealed Speed Rating n3:6700 rpm; Basic Dynamic Radial Load Rating C:13800 N; D:62.0000 mm; d:40.000 mm; B:12.00 mm; Grease Speed Rating Open/Shielded n1:10000 rpm; Accessories:Two Shiel
NN3034 KOYO Double-row cylindrical roller bearings	Height H:4.8906 in; Diameter N:0.5000 in; Distance J:3.8906 in; Shaft Diameter D:15/16 in; Dimension A2:0.6250 in; Height T:1.5313 in; Basic Dynamic Radial Load Rating:3150 lbf; Dimension A1:1.1875 in; Basic Static Radial Load Rating Co:1750 lbf; Weight W:1.35 lb; Dimension L:2.7500 in; Dimension DA

Brand Name	KOYO
Model Number	78/5
Min.Order Quantity	1 pcs
Price	Negotiable

78/5 KOYO Single-row, matched pair angular contact ball bearings

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78/5 KOYO Single-row, matched pair angular contact ball bearings cross reference by manufacturer

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