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NNU4988K NTN Cylindrical Roller Bearing

Name: NNU4988K NTN Cylindrical Roller Bearing
Brand: NTN
SKU: NNU4988K
Rating: 4.9 (5 reviews)

NTN NNU4988K Bearing SPECIFICATIONS

Offer High Quality Brand NNU4988K NTN Cylindrical Roller Bearing 7 mm b .Contact Us 70 mm d1 Online to Get Best Quote. NACHI BEARINGS OF AMERICA CORP.
Brand Name:NTN
Model Number:
NNU4988K
b:7 mm
Mass:0.41 kg
d1:70 mm
d5:74 mm
Associated spanner (Hook spanner in accordance with DIN 1810):HN 10-11
h:3 mm
B:25 mm
Recommended tightening torque:4.2 N·m

Download NTN NNU4988K Spec Sheet

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Thrust Spherical Roller Bearing Specification details

b:7 mm
Mass:0.41 kg
d1:70 mm
d5:74 mm
Associated spanner (Hook spanner in accordance with DIN 1810):HN 10-11
h:3 mm
B:25 mm
Recommended tightening torque:4.2 N·m
G:M 50x1.5
d3:75 mm
Grub (set) / Locking screw size:M 4

NNU4988K NTN Cylindrical Roller Bearing pdf

NTN NNU4988K NNU4988K NTN Cylindrical Roller Bearing Product Features

NN4921 NTN Tapered Roller Bearing	P180°:84.5 kN; Max. speed for PosiTrac Plus seal:1300 r/min; J1:82.55 mm; Stabilizing ring:SR-26-0; P120°:73.8 kN; L:466.725 mm; Cap bolt recommended tightening torque:400 N·m; PG:1/4 NPT; A1:133.35 mm; S:4.763 mm; R1:79.375 mm; H2:60.325 mm; R2:36.513 mm; ba:57.944 mm; Cap bolt, SAE grade:5; Eye bolt:3/8-16 UNC; Labyrinth ring:2 x LOR 116; J min.:371.475 mm; RG:1/2 NPT; Da:230 mm;
NNU4088 NTN Tapered Roller Bearing	Specific static load factor K0:20 N/mm²; Permissible sliding velocity v min.:0.25 m/s; d:15 mm; Coefficient of friction µ min.:0.05; Mass bushing:0.013 kg; Specific dynamic load factor K:10 N/mm²; Tolerance housing:H7; D:20 mm; Tolerance shaft:h8; Permissible sliding velocity v max.:5 m/s; Coefficient of friction µ max.:0.1; B:15 mm;
4R4426 NTN Cylindrical Roller Bearing	P180°:31.6 kN; End plug (suffix Y):EPR 8; R1:53.181 mm; ba:30.163 mm; Stabilizing ring:2 x SR-1516; Labyrinth ring:2 x LOR 43; P150°:26.7 kN; J max.:279.4 mm; Cap bolt:2 x 5/8-11 UNC; J min.:244.475 mm; Cap bolt, SAE grade:5; da:66.675 mm; R2:21.431 mm; Pa:6.23 kN; h:49.212 mm; Appropriate attachment bolt size G:0.75 in; N1:22.225 mm; Mass pillow block:16.4 kg; P90°:49.8 kN; H:169.863 mm;
NN4940K NTN Cylindrical Roller Bearing	T:666.75 mm; Thrust factor K:1.76; Basic static load rating C0:57000 kN; Calculation factor Y1:2; Basic dynamic load rating C:20900 kN; d:863.6 mm; Mass bearing:2150 kg; D:1181.1 mm; d1 ≈:929 mm; Calculation factor Y2:3; Calculation factor e:0.33; D1 ≈:1972 mm; r3,4 min.:3.3 mm; B:666.75 mm; r1,2 min.:4.8 mm; Comparative radial load rating CF:5600 kN; Calculation factor Y0:2; Comparative axial load rating CFa:909 kN;
NNU493 NTN Tapered Roller Bearing	C1 max.:28 mm; Size bolt with internal hexagon:M 10; l7 min.:31 mm; Basic dynamic load rating C:65.5 kN; Specific dynamic load factor K:100 N/mm²; Basic static load rating C0:100 kN; G:M 27x2; d2 max.:76 mm; d4 max.:39 mm; Mass rod end:1.2 kg; B:32 mm; r1 min.:0.6 mm; l3 min.:37 mm; dk:43 mm; α:4 °; l4 max.:119 mm; h1:80 mm; Tightening torque bolt with internal hexagon:46 N·m; N1 max.:23.5 mm;
NNU4944K NTN Cylindrical Roller Bearing	C1 max.:48 mm; Mass rod end:15 kg; G:M 64x4; l4 max.:324 mm; l3 min.:85 mm; w:90 mm; B:55 mm; Basic static load rating C0:655 kN; r1 min.:1 mm; d2 max.:182 mm; l5 ≈:45 mm; α:5 °; d4 ≈:105 mm; dk:105 mm; l7 min.:90 mm; Material constant KM:330; h1:230 mm; Basic dynamic load rating C:400 kN; Specific dynamic load factor K:100 N/mm²; d:80 mm;
NNU4968 NTN Tapered Roller Bearing	Basic static load rating C0:11.2 kN; Da:93.7 mm; Recommended diameter for attachment bolts, inch G:0.375 in; Recommended diameter for attachment bolts, mm G:10 mm; Limiting speed:1200 r/min; d:30 mm; Fatigue load limit Pu:0.475 kN; J6:96 mm; Mass bearing unit:1.05 kg; N:11.5 mm; A1:13 mm; J:82.5 mm; Db2:84 mm; s1:23 mm; N4:4 mm; T:43 mm; A3:3.2 mm; J7:24.5 mm; A5:20 mm; Basic dynamic load rating C:19.5 kN;
NNU4940K NTN Cylindrical Roller Bearing	Limiting value e:0.3; F:499 mm; Calculation factor kr:0.17; D:680 mm; s max.:7.2 mm; Mass bearing:211 kg; D1 ≈:616 mm; Fatigue load limit Pu:520 kN; Limiting speed:1300 r/min; Reference speed:800 r/min; da max.:491 mm; db min.:504 mm; Basic static load rating C0:6700 kN; da min.:483 mm; B:163 mm; r1,2 min.:6 mm; Basic dynamic load rating C:3470 kN; ra max.:5 mm; d:460 mm; Da max.:657 mm;
NN3952 NTN Tapered Roller Bearing	Lw:29.8 mm; Mass needle roller:2.25 g; r1,2 min.:0.3 mm; r2 max.:1 mm; r1 max.:0.8 mm; Dw:3.5 mm;
NNU4924K	d:2.6875 in; seal type:Contact with Flinger; D:6.0000 in; length through bore:3-3/16 in; B:7.6250 in; operating temperature range:Maximum of +225 °F; bore type:Round; finish/coating:Uncoated; duty type:Medium Duty; maximum rpm:2500 RPM; mounting type:Four-Bolt Flange; lubrication type:Lubrication Fitting; housing material:Cast Iron; series:MBF; locking device:Set Screw; replacement bearing:NBG35-2-11/16;
NNU4938 NTN Tapered Roller Bearing	M1:7 mm; Hexagonal head bolt:M 24x50; M2:88 mm; B:70 mm; Spring washer in accordance with DIN 128:A 24; Mass locking clip:0.5 kg; M:21 mm; M3:26 mm;
NN4952K NTN Cylindrical Roller Bearing	Mass bearing:0.19 kg; Basic dynamic load rating C:11.7 kN; Calculation factor (back-to-back, face-to-face) Y1:0.92; rb max.:0.6 mm; db min.:44.6 mm; B:15 mm; Calculation factor f2A:1; Static axial stiffness, preload class C:169 N/µm; Da max.:63.4 mm; Ball diameter Dw:7.144 mm; Static axial stiffness, preload class A:87 N/µm; da max.:49.1 mm; D:68 mm; Calculation factor f:1.06; Db max.:63.8 mm;
NNU49/5 NTN Tapered Roller Bearing	Coefficient of friction µ max.:0.1; Permissible sliding velocity v max.:5 m/s; B:35 mm; D:55 mm; Coefficient of friction µ min.:0.05; d:45 mm; Mass bushing:0.18 kg; Specific dynamic load factor K:10 N/mm²; Specific static load factor K0:20 N/mm²; Permissible sliding velocity v min.:0.25 m/s; Tolerance shaft:h8; Tolerance housing:H7;
NN3072	Rα:45 °; Limiting speed:2800 r/min; Mass bearing unit:1.8 kg; L:101.6 mm; A5:31.5 mm; Basic dynamic load rating C:26 kN; Recommended tightening torque for grub screw:6.5 N·m; RG:1/4-28 UNF; Recommended diameter for attachment bolts, inch G:0.5 in; Basic static load rating C0:19 kN; d:38.1 mm; Db1:96.5 mm; J:143.7 mm; s1:30.2 mm; Hexagonal key size for grub screw N:3.969 mm; Housing:FYTWR 508 Y;
NN3088K NTN Cylindrical Roller Bearing	da max.:87.2 mm; Specific dynamic load factor K:150 N/mm²; Lubricant:Maintenance free &nd; Design (sliding contact surface combination):Steel/steel; Da min.:112.9 mm; ra max.:1 mm; b:9.5 mm; Specific static load factor K0:500 N/mm²; da min.:87.2 mm; M:5 mm; D:130 mm; b1:9.5 mm; dk:115 mm; Material constant KM:330; r2 min.:1 mm; B:75 mm; rb max.:1 mm; r1 min.:1 mm; C:50 mm; Da max.:123.5 mm;
NN3040K	Reference speed:850 r/min; Da max.:514 mm; Cb min.:29 mm; B:102 mm; Mass bearing:107 kg; Fatigue load limit Pu:250 kN; r1,2 min.:6 mm; db min.:286 mm; Basic dynamic load rating C:2120 kN; d:260 mm; r3,4 min.:6 mm; Basic static load rating C0:3050 kN; rb max.:5 mm; D:540 mm; a:93 mm; da max.:325 mm; Db min.:493 mm; Calculation factor e:0.35; C:80 mm; Limiting speed:1300 r/min;

No.	Brand	U	E	w	b	L	N	K	C
NN4938K	NTN	-	730.25 mm	-	22.3 mm	-	-	12 mm	-
NNU3044	NTN	-	-	-	-	-	-	5 mm	-
NNU4936K	NTN	-	-	-	-	-	-	-	-
NN4926	NTN	-	-	-	22.3 mm	-	-	12 mm	-
NN303	NTN	-	-	-	-	679.45 mm	-	-	-
NN3936	NTN	-	-	-	-	285.75 mm	-	-	-
4R382	NTN	-	-	-	-	-	-	-	-
NN3044K	NTN	-	-	-	-	-	-	-	-
4R3817	NTN	-	-	-	13 mm	-	-	7.5 mm	-
4R3625	NTN	-	-	-	-	-	-	-	-
NN4960K	NTN	-	-	-	16 mm	-	-	10 mm	-
NNU49/5	NTN	-	-	-	-	-	-	-	-
4R3229	NTN	-	-	-	-	-	-	-	12.7 mm
NNU4976	NTN	-	-	-	-	539.75 mm	-	-	-
NNU4938	NTN	-	-	-	-	-	-	-	-
NNU3068	NTN	-	-	-	-	-	-	0.5 mm	-
4R4425	NTN	-	-	-	-	-	-	-	-
NN3964	NTN	17 mm	-	-	-	-	-	-	-
NN3088K	NTN	-	-	-	9.5 mm	-	-	-	50 mm
NN394	NTN	-	-	-	-	-	-	-	-
NN4952K	NTN	-	-	-	-	-	-	-	-
NNU4988	NTN	-	-	-	-	-	-	-	-
4R4811	NTN	-	-	-	-	-	-	-	-
NN4060	NTN	-	-	-	-	-	-	-	-

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NTN NNU4988K INTERCHANGE

Thrust Spherical Roller Bearing Part series NNU4988K is a potential replacement for these common bearing part numbers:

NSKNNU4988K
SKFNNU4988K
NTNNNU4988K
FAGNNU4988K
TIMKENNNU4988K
KOYONNU4988K
NACHINNU4988K
DODGENNU4988K

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