LINDE HPR HYDRAULIC PUMP SUPPLIER
LINDE HPR HYDRAULIC PUMP SUPPLIER
Linde HPR Hydraulic Pump   Kawasaki K5V Hydraulic Pump   Kawasaki K3VL Axial Piston Pump  
English
English
  • Home
  • Stock Categories
    • Linde HPR Hydraulic Pump
    • Kawasaki K5V Hydraulic Pump
    • Kawasaki K3VL Axial Piston Pump
    • Kawasaki K3VG Variable Displacement Axial Piston Pump
    • Kawasaki K3V Hydraulic Pump
    • Bosch Rexroth A8VO Variable Displacement Pumps
    • Bosch Rexroth A4VSG Axial Piston Variable Pump
    • Bosch Rexroth A7VO Variable Displacement Pumps
    • Bosch Rexroth A4VTG Axial Piston Variable Pump
    • Bosch Rexroth A4VSO Variable Displacement Pumps
    • Bosch Rexroth A4VG Variable Displacement Pumps
    • Bosch Rexroth A4V Variable Pumps
    • Bosch Rexroth A10VG Axial Piston Variable Pump
    • Bosch Rexroth A10VO Piston Pumps
    • Bosch Rexroth A10VSO Variable Displacement Pumps
    • Bosch Rexroth A11VG Hydraulic Pumps
    • Bosch Rexroth A11VLO Axial Piston Variable Pump
    • Bosch Rexroth A11VO Axial Piston Pump
    • Bosch Rexroth A15VSO Axial Piston Pump
    • Bosch Rexroth A2FO Fixed Displacement Pumps
    • Bosch Rexroth A10VNO Axial Piston Pumps
    • Bosch Rexroth A2V Variable Displacement Pumps
  • Technical Articles
  • Linde HPR Hydraulic Pump
  • Kawasaki K5V Hydraulic Pump
  • Kawasaki K3VL Axial Piston Pump
✖

Home

Stock Categories

Technical Articles

Linde HPR Hydraulic Pump

Kawasaki K5V Hydraulic Pump

Kawasaki K3VL Axial Piston Pump

Home>Products>Bosch Rexroth A10VNO Axial Piston Pumps>A10VNO85DRS-53R-VSC11N BOSCH REXROTH A10VNO Axial Piston Pumps

  • A10VNO85DRS-53R-VSC11N BOSCH REXROTH A10VNO Axial Piston Pumps
  • A10VNO85DRS-53R-VSC11N BOSCH REXROTH A10VNO Axial Piston Pumps

BOSCH REXROTH A10VNO85DRS-53R-VSC11N MODELS

Need a CAD or 3D Model?

What is A10VNO85DRS-53R-VSC11N bearing interchange?
Contact NowWhatsAppBe Our Agent

A10VNO85DRS-53R-VSC11N BOSCH REXROTH A10VNO Axial Piston Pumps

category

Bosch Rexroth A10VNO Axial Piston Pumps

BOSCH REXROTH A10VNO85DRS-53R-VSC11N Bearing SPECIFICATIONS

  • Online shopping A10VNO85DRS-53R-VSC11N BOSCH REXROTH A10VNO Axial Piston Pumps from a 2.44 Y2 - ISO Factor6 great 6.000 mm R - Inner Ring To Clear Radius1 selection at Store. ... Bosch Rexroth A10VNO Axial Piston Pumps Accessories.

  • BOSCH REXROTH
  • A10VNO85DRS-53R-VSC11N

  • 6.000 mm
  • 230
  • 2.44
  • 2.49
  • 960.000 mm
  • 6.000 mm
  • YMD
  • 3.71
LINDE HPR HYDRAULIC PUMP SUPPLIER

LINDE HPR HYDRAULIC PUMP SUPPLIERChina

  • LINDE HPR HYDRAULIC PUMP SUPPLIER2020-07-10 09:46:19
    Welcome to my shop! Glad to serve you! Please send your question!
Price Inspection Certificate Product Specifications Company Profile

Customers who bought this item also bought Bosch Rexroth A10VNO Axial Piston Pumps

  • 6.000 mm
  • 230
  • 2.44
  • 2.49
  • 960.000 mm
  • 6.000 mm
  • YMD
  • 3.71
  • 1030.000 mm
  • 23100000 N
  • 10900000 N
  • 779.000 mm
  • 315 mm
  • METRIC
  • 710.000 mm
  • 865.200 Kg
  • 0.1299
  • Brass
  • 210
  • 315.000 mm

BOSCH REXROTH A10VNO85DRS-53R-VSC11N A10VNO85DRS-53R-VSC11N BOSCH REXROTH A10VNO Axial Piston Pumps Characteristics

 

AL A10VNO 63 DFR/52L-VRC11N00-S2355 BOSCH REXROTH A10VNO Axial Piston PumpsC0 - Static Load:71900 lb; Float:0.083 in; Oil Lubrication - T Seal:2400 rpm; Weight:37.0 lb; Dimension H:1.50 in; Grease Lubrication - T Seal:2000 rpm; Shaft Tolerance:0.0020 in; Bearing Number:22217; Dimension SVV:4.18 in; Pre Install Clearance Max:0.0047 in; Eng Internal Radial Clearance - Max:0.0047; Dimension A:4.00 in; Pre Install Clearance Min:0.0037 in; Grease Lubrication - B/C/O Seal:1100 rpm;
A A10VNO 41 DFR1/52R-HRC40N00 ES1005 BOSCH REXROTH A10VNO Axial Piston PumpsDimension H2:354 mm; Dimension L:500 mm; Ca - Axial Load Rating:4990.69 lbf; Shaft Size:125 mm; Cor - Static Load Rating:111505 lbf; Maximum Speed:1740 rpm; Dimension H:150 mm; Support Type:Two-Bolt Plummer Blo; Cr - Dynamic Load Rating:81606 lbf; Series Type:Light Series; Seal Type:Felt Type; Bolt Size:2 x M30; Housing Width:6.1 in; Bearing Number:LSM125BR; Note:This product line wa; Dimension M:150 mm;
ALA10CO63DRS/53L-VRDXXH143D-S3161 BOSCH REXROTH A10CO Piston Pumpdb - Cone Backface Backing Diameter:28.96 mm; G1 - Heat Generation Factor (Roller-Raceway):10.6; d:22.225 mm; C1 - Dynamic Radial Rating (1 million revolutions)5:10200 lbf; Cup Part Number:1729; C - Cup Width:15.875 mm; B - Cone Width:19.837 mm; K - Factor7:1.9; R - Cone Backface To Clear Radius1:1.270 mm; a - Effective Center Location3:-6.9 mm; C0 - Static Radial Rating:10200 lbf; C90 - Dynamic Radial Rating (90 million revolutions)4:2650 lbf;
AL A10CNO 63 DFR1/52R-VWC12H902D-S428 BOSCH REXROTH A10CNO Piston PumpDx (min):27.5 mm; Snap Ring Width:0.7 mm; Static Load Rating:1,320 N; ra (max):0.3 mm; d:12 mm; Configuration:Single Row; b (min):0.8 mm; Fillet Radius/Chamfer:0.3 mm; Da (max):22 mm; Radial Clearance:0.011 to 0.025 mm; B:6 mm; r1:0.3 mm; Snap Ring Outside Diameter:26.8 mm; D1 (max):22.8 mm; Dynamic Load Rating:2,700 N; D:24 mm; Cy (max):1.5 mm; Bore Type:Cylindrical Bore; Limiting Speed - Grease:30,000 rpm;
A AA10VNO 63 OV/50L-PCX68N00 -SO297 BOSCH REXROTH A10VNO Axial Piston PumpsDimension J2:24.0 in; Maximum Speed:550 rpm; Dimension M:11.5 in; Dimension H:16.496 in; Bolt Size:8 x M30; Dimension L:40.0 in; Dimension K:8.3 in; Dimension J1:32.0 in; Ca - Axial Load Rating:32417 lbf; Shaft Size:330 mm; Weight:1564 lb; Series Type:Medium Series; Note:This product line wa; Support Type:Eight-Bolt Plummer B; Bearing Number:MSM330BR; Dimension H1:2.5 in; Bearing Type:Split Cylindrical Re;
A A10VNO 45 DFR1/52R-VTC40N00-S2241 BOSCH REXROTH A10VNO Axial Piston PumpsBearing Number:MSM155BX; Cr - Dynamic Load Rating:164111 lbf; Dimension L:25.0 in; Bearing - Housing - Seal:MSM155BXHKPS; Dimension M:8.0 in; Cor - Static Load Rating:232453 lbf; Support Type:Four-Bolt Plummer Bl; Bearing Type:Split Cylindrical Ex; Seal Type:Kevlar Packing Seal; Note:This product line wa; Bearing - Housing - Seal UPC:013992085962; Dimension K:5.0 in; Maximum Speed:1320 rpm; Pillow/Plummer Block Style:Split Cylindrical Ho;
AL A10CNO 85 DRSC/53R-VWC07H505G-S5369 BOSCH REXROTH A10CNO Piston PumpDesign Units:Imperial; K - Factor3:1.65; Da - Cup Frontface Backing Diameter:3.68 in; Cg - Geometry Factor7:0.0859; Y2 - ISO Factor6:2.84; Series:385; Y1 - ISO Factor5:1.91; r - Cup Frontface To Clear Radius2:0.03 in; e - ISO Factor4:0.35; D:3.9370 in; C - Double Cup Width:1.6875 in; Y - ISO Factor1:1.69;
G A10CNO 63 OV/52R-VWC12H002D -SO749 BOSCH REXROTH A10CNO Piston PumpLimiting Speed - Grease:8,700 rpm; Groove Diameter:70.7 mm; da (min):57 mm; d:55 mm; Limiting Speed - Oil:10,000 rpm; Fillet Radius/Chamfer:0.3 mm; Static Load Rating:8,100 N; ra (max):0.3 mm; Groove Width:1 mm; Cy (max):2.3 mm; Enclosure:Open; r1:0.3 mm; Weight:0.085 kg; Configuration:Single Row; Da (max):70 mm; B:9 mm; Bore Type:Cylindrical Bore; Factor fo:16.2; Radial Clearance:0.023 to 0.043 mm;
A A10VNO 28 DRS/53L-VTC09N00-S2673 BOSCH REXROTH A10VNO Axial Piston PumpsAb - Cage-Cone Frontface Clearance:0.08 in; Aa - Cage-Cone Backface Clearance:0 in; T - Bearing Width across Cones:1.3126 in; db - Cone Backface Backing Diameter:1.22 in; D:1.9687 in; Design Units:Imperial; Cage Type:Stamped Steel; C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5:2950 lbf; K - Factor7:1.45; C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4:11400 lbf; Series:07000;
A10VNO45DFR1-52R-HRC40N BOSCH REXROTH A10VNO Axial Piston PumpsPillow/Plummer Block Style:Split Cylindrical Ho; Shaft Size:140 mm; Bearing - Housing - Seal UPC:013992078896; Series Type:Light Series; Dimension H2:15.9 in; Bearing Type:Split Cylindrical Ex; Support Type:Four-Bolt Plummer Bl; Bearing Number:LSM140BX; Dimension M:7.0 in; Seal Type:High Temperature Pac; Dimension H1:1.6 in; Housing Width:6.5 in; Bearing UPC:013992028570; Dimension L:22.0 in; Note:This product line wa;
AL A10VNO 45 DFR1/52R-HTC40N00-S2759 BOSCH REXROTH A10VNO Axial Piston PumpsC1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1:39100 lbf; C1 - Dynamic Radial Rating (1 million revolutions)6:99800 N; Cone Part Number:X32210M; Ab - Cage-Cone Frontface Clearance:3.8 mm; Ca90 - Dynamic Thrust Rating (90 million revolutions)7:18600 N; Design Units:METRIC; Cg - Geometry Factor:0.0877; C90 - Dynamic Radial Rating (90 million revolutions)5:25900 N; DD:75.3 mm; G1 - Heat Generation Factor (Roller-Raceway):37.4;
A A10CNO 45 DFR /52R-VSC07H503D-S1832 BOSCH REXROTH A10CNO Piston PumpB:20 mm; Fillet Radius/Chamfer:1.1 mm; Configuration:Single Row; d:75 mm; db (min):81 mm; D:115 mm; r1:1 mm; Weight:0.745 kg; Bore Type:Cylindrical Bore; Enclosure:Open; ra1 (max):1 mm; Da (max):108 mm; Dynamic Load Rating:60,000 N; db (max):83 mm; Limiting Speed - Grease:5,600 rpm; Static Load Rating:74,500 N; ra (max):1 mm; dc (min):87 mm; Limiting Speed - Oil:6,700 rpm; Radial Clearance:0.040 to 0.075 mm;
A10CNO63DFR1-52R-VWC12H602D-S BOSCH REXROTH A10CNO Piston PumpAdapter Sleeve Number1:H2308; Bearing Unit - Adapter Sleeve:UK208 - H2308; Center of Bearing from Housing End A2:21 mm; Locking Style:Adapter Sleeve Locki; Dimension A0:1.875 in; Bolt Hole Spacing J:102.00 mm; Housing Width A:36.00 mm; Static Load Rating:4002 lbf; Dynamic Load Rating:6542 lbf; Housing Style:Four-Bolt Square Fla; Grease Nipple Size:A-1/4-2B UNF; Bolt Hole Size N:16 mm; Total Length L:130.00 mm;
A A10CNO 45 DFR /52R-VSC07H503D-S1958 BOSCH REXROTH A10CNO Piston PumpRadial Clearance:0.008 to 0.023 mm; Fillet Radius/Chamfer:0.3 mm; Configuration:Single Row; B:6 mm; Bore Type:Cylindrical Bore; ra (max):0.3 mm; Enclosure:Open; da (min):12 mm; Limiting Speed - Grease:33,000 rpm; Static Load Rating:1,130 N; Da (max):20 mm; D:22 mm; Dynamic Load Rating:2,490 N; d:10 mm; Weight:0.009 kg; Limiting Speed - Oil:38,000 rpm; Factor fo:14.0;

 

 

No.BrandBAFCESLD
ALA10CO63DRS/53L-VRDXXH143D-S3161BOSCH REXROTH - - - - - - - -
G A10VNO 41 OV/52R-VSC73N00 -S2538BOSCH REXROTH13 mm - - - - - - 80 mm
AL A10C O 63 DRS /53R-VWC07H505G-S4009BOSCH REXROTH27 mm - - - - - - -
A10CNO45DFR1-52R-VSC07H503DBOSCH REXROTH - - - - - - - 90.000 mm
A A10VNO 63 DFR5/52R-VSC11N00-S174BOSCH REXROTH - - - 24 mm - - - -
AL A10CNO 85 DRSC/53R-VWC07H505G-S5369BOSCH REXROTH16 mm - - - - - - 80 mm
AL A10VNO 45 DFR/52R-VRC07N00-S1341BOSCH REXROTH - 160.00 mm - - - - 380.00 mm -
AL A10CNO 63 DFR1/52L-VSC12H803DBOSCH REXROTH68 mm - - - - - - 250 mm
A A10C O 45DFR1/52R-VWC12H502D -S2375BOSCH REXROTH - - - - - - - -
A A10VNO 28 DRS/52R-VRC40N00-S229BOSCH REXROTH - - - - - - - -
A AA10VNO 63 OV/50L-PCX68N00-SO297BOSCH REXROTH - - - - - - - -
AL A10VNO 45 DR/52L-VRC12K01-SO275BOSCH REXROTH - - - - - - - -
A A10VNO 85 DRS/53R-VWC11N00-S4987BOSCH REXROTH138 mm - - - - - - 420 mm
AL A10CNO 45 DFR1/52R-VSC07H503D-S1832BOSCH REXROTH16 mm - - - - - - 75 mm
AL A10VNO 28ED 72/53R-VSC11N00P-S3144BOSCH REXROTH88.900 mm - - - - - - 307.975 mm
A A10CNO 45 DFR1/52R-VSC07H503D-S1832BOSCH REXROTH - - - - - - - -
A A10VNO 85 DRS/53R-VSC12N00-S4235BOSCH REXROTH - - - - - - - -
A A10CO63DRS/53L-VRDXXH143D -S3161BOSCH REXROTH - - - - - - - -
A A10C O 45 DFR1/52L-VUC12H003GBOSCH REXROTH - - - - - - - -
A A10V O 63EP1DS/53R-VUC12N00P -S5668BOSCH REXROTH35 mm - - - - - - 150 mm
AL A10VNO 85 DRS/53L-VWC11N00 -S1346BOSCH REXROTH - - - - - - - -

 

A10VNO85DRS-53R-VSC11N BOSCH REXROTH A10VNO Axial Piston Pumps Video

 

Axial piston pumps | Bosch Rexroth USA

Axial piston pumps in swash plate and bent axis design are intended for the medium and high pressure range. Numerous variations in the designs, ...

Axial piston variable pump | Bosch Rexroth AG

Axial piston variable pump. A10VOH series 60. Size 145; Nominal pressure 320 bar; Maximum pressure 420 bar; Open circuit ...

Axial piston variable pump | Bosch Rexroth AG

Axial piston variable pump. A10VNO series 5x. For low pressure applications such as in tractors or for fan drives; Size 28 … 85; Nominal pressure 210 bar ...

A10VNO series 5x - Bosch Rexroth

Axial piston variable pump. A10VNO series 5x. For low pressure applications such as in tractors or for fan drives; Size 28 … 85; Nominal pressure 210 bar ...

Axial piston variable pump | Bosch Rexroth AG

Axial piston variable pump. A10VO series 5x. For machines with medium pressure requirements; Size 10 … 100; Nominal pressure 250 bar; Maximum pressure 315 ...

Axial piston variable pump | Bosch Rexroth AG

Axial piston variable pump. A10VO series 31. All-purpose medium pressure pump; Size 18 … 100; Nominal pressure 280 bar; Maximum pressure 350 bar ...

Axial piston variable pump A10VNO series 52 and 53 Americas

Features. ▷ Variable pump with axial piston rotary group of swash- plate design for hydrostatic drives in open circuits. ▷ The flow is proportional to the ...

Axial piston variable pump - A10VNO - Bosch Rexroth

Axial piston variable pump. A10VNO series 5x. For low pressure applications such as in tractors or for fan drives; Size 28 … 85; Nominal pressure 3050 psi ...

Axial piston variable pump | Bosch Rexroth AG

Axial piston variable pump. A10VO series 32. Optimized medium pressure pump for high power machines; Size 45 … 180; Nominal pressure 280 bar ...

BOSCH REXROTH A10VNO85DRS-53R-VSC11N INTERCHANGE

Bosch Rexroth A10VNO Axial Piston Pumps Part series A10VNO85DRS-53R-VSC11N is a potential replacement for these common bearing part numbers:

  • A10VNO85DRS-53R-VSC11N

  • A10VNO85DRS-53R-VSC11N

  • A10VNO85DRS-53R-VSC11N

  • A10VNO85DRS-53R-VSC11N

  • A10VNO85DRS-53R-VSC11N

  • A10VNO85DRS-53R-VSC11N

  • A10VNO85DRS-53R-VSC11N

  • A10VNO85DRS-53R-VSC11N

Contact Us

LINDE HPR HYDRAULIC PUMP SUPPLIER
Address
Phone(Working Time)
Fax
  • LINDE HPR HYDRAULIC PUMP SUPPLIER
    • 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

BOSCH REXROTH A10VNO85DRS-53R-VSC11N Technical Articles

What are the three types of piston pumps?
Main Pump Types – Reciprocating Piston - Houston Dynamic Sep 21, 2017 — Many pumps fall into the positive displacement arena, and they can generally be divided into two categories: reciprocating and rotary. What is a piston pump? its working, types,...
What controls the stroke of an axial piston pump?
The Basics of Variable-Displacement Pump Controls - Fluid Nov 14, 2016 — Pressure-compensated control is the most basic control for a variable-stroke piston pump. The swash plate of the pump is off-set by a heavy  Operation instructions for axial piston...
What is a piston pump?
Piston Pumps | Engineers EdgeA piston pump is a type of reciprocating pump that moves and pressurizes fluid by using one or more reciprocating pistons; it is typically driven by an  4 Main & Practical Types of Piston Pumps - LinquipMay 1, 2022 — A...

Bosch Rexroth A10VNO Axial Piston Pumps CATEGORIES

  • Linde HPR Hydraulic Pump
  • Kawasaki K5V Hydraulic Pump
  • Kawasaki K3VL Axial Piston Pump
  • Kawasaki K3VG Variable Displacement Axial Piston Pump
  • Kawasaki K3V Hydraulic Pump
  • Bosch Rexroth A8VO Variable Displacement Pumps
  • Bosch Rexroth A4VSG Axial Piston Variable Pump
  • Bosch Rexroth A7VO Variable Displacement Pumps
  • Bosch Rexroth A4VTG Axial Piston Variable Pump
  • Bosch Rexroth A4VSO Variable Displacement Pumps
  • Bosch Rexroth A4VG Variable Displacement Pumps
  • Bosch Rexroth A4V Variable Pumps
  • Bosch Rexroth A10VG Axial Piston Variable Pump
  • Bosch Rexroth A10VO Piston Pumps
  • Bosch Rexroth A10VSO Variable Displacement Pumps
  • Bosch Rexroth A11VG Hydraulic Pumps
  • Bosch Rexroth A11VLO Axial Piston Variable Pump
  • Bosch Rexroth A11VO Axial Piston Pump
  • Bosch Rexroth A15VSO Axial Piston Pump
  • Bosch Rexroth A2FO Fixed Displacement Pumps
  • Bosch Rexroth A10VNO Axial Piston Pumps
  • Bosch Rexroth A2V Variable Displacement Pumps
More

Customers Who Viewed BOSCH REXROTH A10VNO85DRS-53R-VSC11N Bearing Also Viewed

  • A A10VNO 41 DFR1/52R-HRC40N00 -S1005 BOSCH REXROTH A10VNO Axial Piston Pumps
  • AL A10CNO 85 DRS/53R-VWC07H505G-S395 BOSCH REXROTH A10CNO Piston Pump
  • AL A10CNO 85 DRSC/53R-VWC07H505G-S5369 BOSCH REXROTH A10CNO Piston Pump
  • A A10C O 45DFR1/52R-VWC12H502D -S4281 BOSCH REXROTH A10CO Piston Pump
  • A A10CNO63DFR1/52R-VWC12H702D-S3881 BOSCH REXROTH A10CNO Piston Pump
 
  • About Us|
  • Contact Us|
  • Site Map
  • Sitemaps

LINDE HPR HYDRAULIC PUMP SUPPLIER. Copyright © 2017 - 2023 All Rights Reserved.

  • Home
  • Stock Categories
    • Linde HPR Hydraulic Pump
    • Kawasaki K5V Hydraulic Pump
    • Kawasaki K3VL Axial Piston Pump
    • Kawasaki K3VG Variable Displacement Axial Piston Pump
    • Kawasaki K3V Hydraulic Pump
    • Bosch Rexroth A8VO Variable Displacement Pumps
    • Bosch Rexroth A4VSG Axial Piston Variable Pump
    • Bosch Rexroth A7VO Variable Displacement Pumps
    • Bosch Rexroth A4VTG Axial Piston Variable Pump
    • Bosch Rexroth A4VSO Variable Displacement Pumps
    • Bosch Rexroth A4VG Variable Displacement Pumps
    • Bosch Rexroth A4V Variable Pumps
    • Bosch Rexroth A10VG Axial Piston Variable Pump
    • Bosch Rexroth A10VO Piston Pumps
    • Bosch Rexroth A10VSO Variable Displacement Pumps
    • Bosch Rexroth A11VG Hydraulic Pumps
    • Bosch Rexroth A11VLO Axial Piston Variable Pump
    • Bosch Rexroth A11VO Axial Piston Pump
    • Bosch Rexroth A15VSO Axial Piston Pump
    • Bosch Rexroth A2FO Fixed Displacement Pumps
    • Bosch Rexroth A10VNO Axial Piston Pumps
    • Bosch Rexroth A2V Variable Displacement Pumps
  • Technical Articles
  • Linde HPR Hydraulic Pump
  • Kawasaki K5V Hydraulic Pump
  • Kawasaki K3VL Axial Piston Pump
✖

Home

Stock Categories

Technical Articles

Linde HPR Hydraulic Pump

Kawasaki K5V Hydraulic Pump

Kawasaki K3VL Axial Piston Pump

Contact Us