Shanghai Ruonan-Power Co., Ltd.
Shanghai Ruonan-Power Co., Ltd.
AMI Bearing   AURORA Bearing   KOYO Bearing  
  • Home
  • Product Categories
    • AMI Bearing
    • AURORA Bearing
    • KOYO Bearing
    • NTN Bearing
    • PCI Bearing
    • QM INDUSTRIES Bearing
    • REXNORD Bearing
    • RHP Bearing
    • RIT Bearing
    • S LIMITED Bearing
    • SKF Bearing
    • Toyana Bearing
    • SKF 24 Bearing
    • 7316 Bearing
    • SKF 623 Bearing
    • SKF Tmba G11 Bearing
  • Company Profile
    • Company Introduction
  • Technical Articles
  • Contact Us

Home>Products>NTN Bearing>3,175 mm x 9,525 mm x 3,967 mm NTN R2 deep groove ball bearings

English
English
  • 3,175 mm x 9,525 mm x 3,967 mm  NTN R2 deep groove ball bearings
  • 3,175 mm x 9,525 mm x 3,967 mm  NTN R2 deep groove ball bearings
  • 3,175 mm x 9,525 mm x 3,967 mm  NTN R2 deep groove ball bearings
  • 3,175 mm x 9,525 mm x 3,967 mm  NTN R2 deep groove ball bearings
  • 3,175 mm x 9,525 mm x 3,967 mm  NTN R2 deep groove ball bearings
  • 3,175 mm x 9,525 mm x 3,967 mm  NTN R2 deep groove ball bearings

3,175 mm x 9,525 mm x 3,967 mm NTN R2 deep groove ball bearings

  • LET Shanghai Ruonan-Power Co., Ltd. OUR 21,900 Dynamic Load Rating (Cr) 3,175 mm x 9,525 mm x 3,967 mm NTN R2 deep groove ball bearings EXPERTS 3,175 mm x 9,525 mm x 3,967 mm GET YOU NCS4824 Bearing number THE PARTS YOU NEED.

  • What is R2 bearing cross reference?

  • NTN
  • R2

  • 76,2
  • 21,900
  • NCS4824
  • 3.7500
  • 558.00
  • 52100 Chrome steel,
  • 1.5000
  • 95,25
Contact NowChat Now
Shanghai Ruonan-Power Co., Ltd.

Shanghai Ruonan-Power Co., Ltd.China

  • Shanghai Ruonan-Power Co., Ltd.2020-07-10 09:46:19
    Welcome to my shop! Glad to serve you! Please send your question!
Price Inspection Certificate Product Specifications Company Profile

3,175 mm x 9,525 mm x 3,967 mm NTN R2 deep groove ball bearingsDimensions

Bore Diameter (mm): 76,2 Dynamic Load Rating (Cr): 21,900 Bearing number: NCS4824
Outer Dia (D): 3.7500 Weight (g): 558.00 Material: 52100 Chrome steel,
Width (B): 1.5000 Outer Diameter (mm): 95,25 Max Speed (Oil) (X1000 RPM): 6,000
Static Load Rating (Cor): 41,500 Size (mm): 3,175 mm x 9,525 mm x 3,967 mm
3,175 mm x 9,525 mm x 3,967 mm NTN R2 deep groove ball bearings pdf

R2Customers who bought this item also bought

Seal TypeViton Single Lip
Bearing TypeSplit Cylindrical Ex
Pillow/Plummer Block StyleSplit Cylindrical Ho
Weight216 lb
Cor - Static Load Rating157366 lbf
Dimension L22.0 in
Dimension K4.7 in
Series TypeMedium Series
Support TypeFour-Bolt Plummer Bl
Dimension M7.0 in

See Specifications for 3,175 mm x 9,525 mm x 3,967 mm NTN R2 deep groove ball bearings


  • NTN NA6910R needle roller bearings

    d1:65 mm; Characteristic cage frequency, FTF:0.44 Hz; ra max:3.5 mm; Weight:0,615 Kg; r1a max:1.3 mm; Bearing number:4T-2984/2924; db:52 mm; (Oil) Lubrication Speed:5 800 r/min; Size (mm):46.038x85x25.4; d:46,038 mm;
    Read More ...
  • NTN 4T-576/572 tapered roller bearings

    Brand:CX; C:140 mm; B:140 mm; Ew:894 mm; Basic static load rating (C0):8530 kN; Basic dynamic load rating (C):3650 kN; (Grease) Lubrication Speed:600 r/min; Size (mm):710x950x140; Bearing number:N29/710; Outer Diameter (mm):950;
    Read More ...
  • NTN SF06A24 angular contact ball bearings

    Static Load Rating (Cor):236; Radius (min) (rs):0.150; Precision:A1; Bearing number:SMF126ZZ; Max Speed (Grease) (X1000 RPM):43; Max Speed (Oil) (X1000 RPM):50; Standard Clearance:K25; Weight (g):1.86; Brand:AST; Ball Qty:8;
    Read More ...
  • NTN NNU4926KC1NAP4 cylindrical roller bearings

    d3:58 mm; d:40 mm; Mounting Method:Eccentric Collar; Mounting Bolts:12 Millimeter; Keyword String:Pillow Block; Inventory:0.0; Seals:Double Lip Contact; Brand:INA; Long Description:2 Bolt Tap Base Pill; Housing Style:2 Bolt Tap Base Pill;
    Read More ...
  • NTN 6820LLB deep groove ball bearings

    Basic dynamic load rating (C):460 kN; D:240 mm; (Grease) Lubrication Speed:1600 r/min; Outer Diameter (mm):240; Width (mm):50; Bore Diameter (mm):110; Weight:11,1 Kg; Size (mm):110x240x50; Basic static load rating (C0):630 kN; C:50 mm;
    Read More ...
  • NTN 230/710BK spherical roller bearings

    Size (mm):30x100x38; J:80 mm; H1:30 mm; Static Axial rigidity:950 N/micron; Limiting speed:4300 r/min; Fatigue load limit - Pu:4 kN; Required attachment bolt size:M8; Mass bearing:1.65 kg; a:106 mm; Bore Diameter (mm):30;
    Read More ...
  • NTN NU206E cylindrical roller bearings

    Bore Diameter (mm):105; Angle (α):25 °; Brand:ISO; Bearing number:71921 A; D:145 mm; d:105 mm; C:20 mm; Outer Diameter (mm):145; Width (mm):20; B1:20 mm;
    Read More ...
  • NTN NU1010 cylindrical roller bearings

    Eng Internal Radial Clearance - Max:0.0039; Housing Style:Piloted Flange Cartr; Oil Lubrication - T Seal:2400 rpm; Oil Lubrication - B/C/O Seal:1000 rpm; Dimension L Fix:4.19 in; Dimension F:10.34 in; Locking Style:Double Concentric; Weight:32 lb; Float:0.083 in; Dimension RAA:0.99 in;
    Read More ...
  • NTN SF9211 angular contact ball bearings

    Da min:110 mm; a:26 mm; D:121,442 mm; da max:84 mm; d:77,788 mm; Cb min.:7 mm; db min:90 mm; Weight:0,932 Kg; Calculation factor (e):0,45; r3 min.:2 mm;
    Read More ...
  • NTN 7224C angular contact ball bearings

    bore diameter:45 mm; bearing material:Case Carburized Stee; cone width:20 mm; Bearing number:32009X; Brand:NTN; Outer Diameter (mm):75; B:2 mm; dynamic load capacity:57500 N; outside diameter:75 mm; assembly type:Cone & Cup;
    Read More ...
  • NTN KV53X57X19.8 needle roller bearings

    Outer Diameter (mm):115; r1 min.:1,1 mm; ra max.:1 mm; Bore Diameter (mm):75; Limiting speed:130 r/min; Weight:1,4 Kg; r2 min.:1,1 mm; Brand:SKF; D:115 mm; Calculation factor (k2):0,063;
    Read More ...
  • NTN HUB082-13 angular contact ball bearings

    Other Features:Single Row | Centeri; S:6 mm; Thread (Q):Rp1/8; Weight:5,19 Kg; Noun:Bearing; H:220 mm; UNSPSC:31171501; Bore:2.953 Inch | 75 Mill; Number of Mounting Holes:4;
    Read More ...
  • NTN DF0484NX angular contact ball bearings

    Series:LM722900; G2 - Heat Generation Factor (Rib-Roller End):57.2; r - Cup Backface To Clear Radius1:3 mm; D1 - Flange Outer Diameter:172.000 mm; Y - ISO Factor4:1.31; Design Units:METRIC; D:165.000 mm; G1 - Heat Generation Factor (Roller-Raceway)5:161; Cup Part Number:JLM722912-B; C1 - Cup Flange
    Read More ...
  • NTN NK73/25R needle roller bearings

    B:19 mm; C:16 mm; a:17 mm; Outer Diameter (mm):58; Bore Diameter (mm):28; d:28 mm; Size (mm):28x58x20.25; T:20,25 mm; Bearing number:322/28; Brand:ISO;
    Read More ...
  • NTN NK19/20R+IR15×19×20 needle roller bearings

    Ew:15.875 mm; Bc:12.70 mm; Basic static load rating (C0):8,6 kN; Basic dynamic load rating (C):6,65 kN; (Grease) Lubrication Speed:16 000 r/min; Fw:12.700 mm; Bore Diameter (mm):12.700; Weight:0.003 Kg; Brand:NTN; Bearing number:PCJ081008;
    Read More ...

 

NTN Bearing Knowledge Base
DCdBC0EANSizeRoHS
R29,525 mm0,631 kN3,175 mm3,967 mm0,219 kN - 3.175x9.525x3.967 -
R29,525 mm3,967 mm3,175 mm3,967 mm - - 3.175x9.525x3.967 -
R29,525 mm0,628 kN3,175 mm3,967 mm0,216 kN - 3.175x9.525x3.967 -
R20.375 Inch | 9.525 Millimeter - 0.125 Inch | 3.175 Millimeter - - 0097741021531 - -
R20.375 Inch | 9.525 Millimeter - 0.125 Inch | 3.175 Millimeter - - 0662300150054 - -
R20.375 Inch | 9.525 Millimeter - 0.125 Inch | 3.175 Millimeter - - - - -
R2 - - - - - 8865590054503 - -
R20.375 Inch | 9.525 Millimeter - 0.125 Inch | 3.175 Millimeter - - - - -
R20.3750 in - 0.1250 in0.1562 in - - - -
R29.525/0.3750 - 3.175/0.12503.967/0.1562 - - - 6

 

3,175 mm x 9,525 mm x 3,967 mm NTN R2 deep groove ball bearings Overview
EmJdHZKF
4T-576/572 - - - - - - - -
DF0484NX - - - - - - - -
HUB082-13 - - - - 220 mm - - -
NK19/20R+IR15×19×20 - - - - - - - -
NNU4926KC1NAP4 - - - 40 mm - - - -
NA6910R - - - 46,038 mm - - - -
7224C - - - - - - - -
NU1010 - - - - - - - -
SF06A24 - - - - - - - -
230/710BK - - 80 mm - - - - -
SF9211 - - - 77,788 mm - - - -
NU206E - - - 105 mm - - - -
NK73/25R - - - 28 mm - - - -
6820LLB - - - - - - - -
KV53X57X19.8 - - - - - - - -
SL04-5024N - - - 19,05 mm - - - -
30316DUDF - - - - - - - -
T-M241543/M241510 - - - 500,000 mm90,000 mm - - -
K68X75X23.3 - - - 70 mm - - - -
CRI-4202 - - - 241,3 mm - - - -
SL04-5028LLNR - - - - - - - -
6996 - - - 120 mm - - - -
6222LU - - - - - - - -
7314BDB - - - - - - - -
NJ208E - - - 88,9 mm - - - -
NFV1892 - - - - - - - -
DCL105 - - - 1.7500 in - - - -
23092BK - - - - - - - -
EC-6000LLU - - - - - - - -
CRD-6151 - - - - - - - -
23134BK - - - - - - - -
UCS213D1 - - - - - - - -
7005C - - - - - - - -
NJ313E - - - - - - - -
7905UCG/GNP4/15KQTQ - - - 260 mm - - - -
2203S - - - 1112 mm90 mm113 mm - -
7409BDB - - - - - - - -
QJ211 - 399 kg / Weight - 1000 mm - - - -
4T-25590/25523 - - - - - - - -
4T-64450/64700CD+A - - - 20,000 mm - - - -
240/950B - - - 75 mm - - - -
29440 - - - 90 mm - - - -
L357049/L357010 - - - 31,7 mm - - - -
51126 - - - 100 mm - - - -
NN3015K - - - - - - - -
NK105/26R+IR95×105×26 - - - - - - - -
CRO-7228 - - - - - - - -
4T-25577/25522 - - - 280 mm - - - -
QJ312 - - - - - - - -
M349549A/M349510 - - - - - - - -
NKIA5912A - - - 38,1 mm - - - -
DCL128 - - - 110 mm - - - -
KV22X26X33.8ZW - - - - - - - -
RA4ZZ - - - - - - - -
NUP319E - - - 114,3 mm - - - -
7001CG/GNP42 - - - - - - - -
29368 - - - 45 mm - - - -
K100×108×27 - - - 35 mm - - - -
51420 - - - 110 mm25 mm - - -
231/900BK - - - 15 mm - - - -
KJ36X41X20.3 - - 171 mm - - - - -
2RT15002 - - - - - - - -
78/1060 - - 22,5 mm - - - - -
7308CP5 - - - - - - - -
NJ414 - - - 750 mm - - 12 mm -
FL625Z - - - - - - - -
7226BDB - - - - - - - -
RNA2205XLL - - - 480 mm - - - -
4T-05075/05185 - - - - - - - -
1209SK - 0,022 lbs / Weight - - - - - -
K89308 - - - - - - - -
T-LM654648D/LM654610+A - - - - - - - -
32320 - - - 240 mm - - - -
7830CT1UP - - - - - - - -
4T-LM603049/LM603012 - - - 2.2500 in - - - -
NJ2305 - - - 10 mm - - - -
7328BDB - - - 30 mm - - - -
SL01-4912ZZ - - - - - - - -
SF3235VP-1 - - - - - - - -
4T-496/493DC+A - - - 300 mm - - - -
NN3956KC1NAP4 - - - 15 mm - - - -
2LA-BNS919CLLBG/GNP42 - - - - - - - -
E-EE737179D/737260/737260D - - - 80 mm - - - -
NU2315E - - - - - - - -
CRO-13708 - - - 65 mm - - - -
24168BK30 - - - - - - - -
NUP2215 - - - 254 mm - - - -
NF407 - - - - - - - -
4T-3382/3321 - - - - - - - -
KBK16X20X18.8 - - - - - - - -
NN3040KC1NAP5 - - - - - - - -
NUP240 - - - - - - - -
239/1250K - - - 75 mm - - - -
K25X30X39ZW - - - 101,6 mm - - - -
NN3940KC9NAP4 - - - 7 mm - - - -
NK19/16R+IR15×19×16 - - - - - - - -
63308ZZ - - - 35 mm - - - -
K78X85X38.2 - - - 190,000 mm - - - -
22260B - - - - - - - -
30215 - - - 560 mm - - - -
T-HH437549/HH437510 - - - - - - - -
E-4R10010 - - - - - - - -
R2 - - - - - - - -
6008 - - - - - - - -
R07A72V - - - - - - - -
22326BK - - - 1000 mm - - - -
WBC5-13Z - - - - - - - -
SX04A81 - 1,225 lbs / Weight - - - - - -
4T-37425/37625 - - - - - - - -
EE170975D/171450+A - - - 6 mm - - - -
K22X32X13.4 - - - 20 mm - - - -
K12×18×12 - - - - - - - -
625Z - - - - - - - -
NN3020 - - - - - - - -
SC0142ZZNR - - - - - - - -
4T-3780/3726 - - - - 68 mm - - -
PK28X36X15.8 - - - - - - - -
RNA4902R - - - 710 mm - - - -
M276449/M276410DG2+A - - - 30 mm - - - -
33018U100 mm - - - - - - -
FLBC3-9 - - - - - - - -
60/28Z - - - - - - - 42 mm
MR162412 - - - 38 mm - - - -
7020CDB/GNP4 - - - - - - - -
F-697LLU - - - - - - - -
2P5217L - - - - - - - -
NU344 - - - - - - - -
SC6A22ZZ - - - - - - - 193 mm
KBK14X18X20 - - - - - - - -
NJ2252 - - - - - - - -
HM259049D/HM259010+A - - - 100 mm - - - -
RA188ZZ - - - - - - - -
NUP204 - - - - - - - -
7004UADG/GNP42 - - - - - - - -
4R24002 - - - - - - - -
6011N - - - 333,375 mm - - - -
6913ZZNR - - - - - - - -
7002UCGD2/GLP4 - - - 420 mm - - - -
6010 - - - - - - - -
31330X - - - - - - - -
NJ317 - - - 300 mm - - - -
HCK1319 - - - 1180 mm - - - -
24156B - - - - - - - -
PK40X60X29.8 - - - 15 mm - - - -
E-E30902/131401D+A - - - 130 mm - - - -
NF222 - - 176,7 mm - - - - -
R0684 - - - - - - - -
FLAWBC7-13Z - - - 840 mm - - - -
K10×14×13 - - - - - - - -
E-4R15207 - - - - - - - -
NNU4952C1NAP4 - 0,269 kg / Weight - - - - - -
688TD/672+A - - - 380 mm - - - -
32016XU - - - - - - - -
FL673SSA - - - 3.3750 in - - - -
6011ZNR - - - 1 1/8 inch - - - -
NN3005KC1NAP4 - - - - - - - -
KMJ95X102X20.8 - - - - - - - -
KJ30X37X22.8 - - - - - - - -
NNU4968C1NAP4 - - - 190 mm - - - -
KLM40 - - 187 mm50 mm240 mm - - -
R2221 - - - - - - - -
HUB208-3 - - - 55 mm - - - -
NJ2204 - - - 280 mm - - - -
7006 - - - - - - - -
F-6001J1LLU - - - - - - - -
7821C - - - - - - - -
7211CG/GNP4 - - - - - - - -
HUB182-4 - - - - - - - -
HTA032DB/GNP4L130 mm - - 50 mm - - - -
2316SK - - - - - - - -
4R4037 - - - 1.0000 in - - - -
GK17X22X21.8 - - - - - - - -
87013 - - - - - - - -
6200LU - - - 180 mm - - - -
E-4R16405 - - - 95 mm - - - -
7028DB - - - - - - - -
NN4938C1NAP4 - - - - - - - -
KMJ17X22X14.1 - - - - - - - -
5A-R07A70VPX1 - - - - - - - -
NUP2318 - - - - - - - -
5206SCLLM - - - 254 mm - - - -
RNH1017 - - - - - - - -
QUOTE

Bearing R2-6ZZA (NTN) | Size and Specification | Bearings

Deep groove ball bearings R2-6ZZA. Bearing number : R2-6ZZA. Size (mm) : 3.175x9.525x3.571. Brand : NTN. Bore Diameter (mm) : 3,175. Outer Diameter 
QUOTE

principais características (1) dos títulos da dívida pública

Aug 29, 2007 - ... artigo 6º do Decreto nº. 916, de 8.9.1993; e artigo 15 do Decreto nº 3.859, de 4.7.2001. NTN-R2 – Notas do Tesouro Nacional Subsérie R2
QUOTE

Organic Synthesis: Special Techniques

Thus, R! .o R'CH(X)—Co—NHR' *** R2–NTN—R2 TEBA O 1 7.22.10 Thietanes These are prepared” very conveniently by the reaction of 1,3-dihaloalkanes with 
QUOTE

Silver Catalysis in Organic Synthesis

NTN R2 Ağ-OTFA `NTf CF2COOH R3 R1 offa R2 NHTf Ag R3 R1 N N R2 *-* F3C 2 *O NTN CF2COOH o-oo. N H Ag-OTFA NY NTf Ag-N TfM R3 R1 R2 R R1 R2 
QUOTE

CAD FÓRMULAS - SELIC (revisão - NTN-I)_v2 - Tesouro

Nacional Série P – NTN-P e Notas do Tesouro Nacional Série R2 – NTN-R2. As metodologias apresentadas referem-se aos cálculos de Preço Unitário –
QUOTE

NTN R2-5|Bearing R2-5 bearings Belize - Bearings

Original imported NTN R2-5 Online Bearings Center,Bearingspdf.com can suply you NTN R2-5 Stock,NTN R2-5 Price,NTN R2-5 specification:0.125--0.3125 
QUOTE

Journal of the National Cancer Institute: JNCI

DP3 DPy TúT RT E) 3-0x0-1-butenyl derivatives 145,662 R--ch-ch-o-ch, 200 200 180 ×200 200 (ILP/BO) R2 = OH N– OCH2C6H3 200 200 200 2= 144,123 
QUOTE

Miniature and Small Size Ball Bearings - NTN Global

R2-5. RA2-5Z. ZZ. FLR2-5. FLRA2-5Z. ZZ. 4. 4.4. 7. 0.08. 0.61. 0.68. R2-6. RA2-6ZA. ZZA. FLR2-6. FLRA2-6ZA. ZZA. 4. 5.2. 8.7. 0.1. 0.88. 0.96. R2. RA2ZA. ZZA
QUOTE

R2 NTN New Single Row Ball Bearing: Deep Groove Ball

Brand Name, NTN. Item Weight, 1.0 pounds. Number of Items, 1. Part Number, R2. UNSPSC Code, 27000000. See more product details. PillPack—An Amazon 

Contact Us

Shanghai Ruonan-Power Co., Ltd.
AddressNo.36 Building, JuCheng Pioneer Park, No.3257 Lane, XiuPu Road
Phone(Working Time)86-02-8689236
Fax
  • Shanghai Ruonan-Power Co., Ltd.
    • Quick question Quick question I'm very interested in your products; could you send me some detail reference information? Please send me detail product specification, thank you! May I be an agency of your products,and what's yourterms? We intend to purchase this product, would you please send me the quotation and minimum order quantity?
     This feature is Quick question function, select the corresponding question types, automatically enter the corresponding problem, remove your trouble of typing
Send Now

Related News

timken rear wheel bearings number and size chart pdf
Timken HA590335 Rear Wheel Hub and Bearing Buy Timken HA590335 Rear Wheel Hub and Bearing: Hub Assemblies - Amazon.com ✓ FREE DELIVERY possible on eligible purchases Timken HA590317 Rear Wheel Hub and Bearing Buy Timken HA590317 Rear Wheel Hub and...
ina linear rail price list
INA Linear Technology - the Schaeffler Groupfor high-quality rolling bearing technology as well as components and systems for the auto- motive industry. INA linear guidance systems have been an  INA Linear Rolling Bearings and Linear Plain...
INA Pillow Block Bearings size catalogue
Ina Pillow Block Bearing, Ball, 90mm Bore RASE90 |Order INA Pillow Block Bearing, Ball, 90mm Bore, RASE90 at Zoro.com. Great prices & free shipping on orders over USD50! INA-FAG - Product Reference Guide - Tri-State Bearinglization. D Location...

Product Categories

  • AMI Bearing
  • AURORA Bearing
  • KOYO Bearing
  • NTN Bearing
  • PCI Bearing
  • QM INDUSTRIES Bearing
  • REXNORD Bearing
  • RHP Bearing
  • RIT Bearing
  • S LIMITED Bearing
  • SKF Bearing
  • Toyana Bearing
  • SKF 24 Bearing
  • 7316 Bearing
  • SKF 623 Bearing
  • SKF Tmba G11 Bearing
More

New Products

  • 85,000 mm x 118,500 mm x 22,000 mm NTN RNH1017 cylindrical roller bearings
  • 30 mm x 62 mm x 23,8 mm NTN 5206SCLLM angular contact ball bearings
  • 90 mm x 190 mm x 64 mm NTN NUP2318 cylindrical roller bearings
  • NTN 5A-R07A70VPX1 cylindrical roller bearings
  • NTN KMJ17X22X14.1 needle roller bearings

Top Products

SKF 29376 thrust roller bearings RHP 22244MW33 Bearings PCI PTRY-2.50E-HT Bearings
AURORA GE60ET-2RS/X Bearings Timken lm11949 Bearing
  • About Us|
  • Contact Us|
  • Site Map
  • Sitemaps

Shanghai Ruonan-Power Co., Ltd.. Copyright © 2017 - 2021 All Rights Reserved.

  • Home
  • Product Categories
    • AMI Bearing
    • AURORA Bearing
    • KOYO Bearing
    • NTN Bearing
    • PCI Bearing
    • QM INDUSTRIES Bearing
    • REXNORD Bearing
    • RHP Bearing
    • RIT Bearing
    • S LIMITED Bearing
    • SKF Bearing
    • Toyana Bearing
    • SKF 24 Bearing
    • 7316 Bearing
    • SKF 623 Bearing
    • SKF Tmba G11 Bearing
  • Company Profile
    • Company Introduction
  • Technical Articles
  • Contact Us