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 A8VO Variable Displacement Pumps>A8VO107SR3-61R1-NZG05K07 BOSCH REXROTH A8VO Variable Displacement Pumps

  • A8VO107SR3-61R1-NZG05K07 BOSCH REXROTH A8VO Variable Displacement Pumps
  • A8VO107SR3-61R1-NZG05K07 BOSCH REXROTH A8VO Variable Displacement Pumps

BOSCH REXROTH A8VO107SR3-61R1-NZG05K07 MODELS

Need a CAD or 3D Model?

What is A8VO107SR3-61R1-NZG05K07 bearing interchange?
Contact NowWhatsAppBe Our Agent

A8VO107SR3-61R1-NZG05K07 BOSCH REXROTH A8VO Variable Displacement Pumps

category

Bosch Rexroth A8VO Variable Displacement Pumps

BOSCH REXROTH A8VO107SR3-61R1-NZG05K07 Bearing SPECIFICATIONS

  • A8VO107SR3-61R1-NZG05K07 BOSCH REXROTH A8VO Variable Displacement Pumps with easy-to-use parts graphics, giving SETSCREW Shaft Attachment Type you the Setscrew Bearing Locking Device ability to check parts availability, Bosch Rexroth A8VO Variable Displacement Pumps pricing, examine remanufactured options.

  • BOSCH REXROTH
  • A8VO107SR3-61R1-NZG05K07

  • SETSCREW
  • 315 Series
  • Setscrew
  • 782475697816
  • 3.9375 in
  • 65
  • NO
  • Top Angle Take-Up
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 A8VO Variable Displacement Pumps

  • SETSCREW
  • 315 Series
  • Setscrew
  • 782475697816
  • 3.9375 in
  • 65
  • NO
  • Top Angle Take-Up
  • Non-Expansion
  • 59.02 LB
  • TYPE E
  • 315 SERIES (315 - 40
  • Triple Lip
  • Mobilgrease XHP222
  • Steel
  • Tapered

BOSCH REXROTH A8VO107SR3-61R1-NZG05K07 A8VO107SR3-61R1-NZG05K07 BOSCH REXROTH A8VO Variable Displacement Pumps Frequently purchased together

 

A8VO107LA1H1-60R1-NSG05FOO-S BOSCH REXROTH A8VO Variable Displacement PumpsShaft Attachment (2):Set Screw; Housing Coating:Powder Coat; Self Aligning:Self Centering; Ring Size:Standard; Bearing Outer Ring Material:Steel; Ship Weight:0.67 LB; Flinger Type:None; Bearing Bore Shape:Round; Base to Center Height:Not Applicable; End Cap Groove:No; Ball Material:Steel; Bearing Duty:Intermediate Duty; Retainer Material:Nylon; Ball Bearing Housing Series:204 Series; UPC:782475860999;
A8VO200LA1KH1/63R1-NZG05F00X-S BOSCH REXROTH A8VO Variable Displacement PumpsRing Size:Standard; Retainer Type:Std Retainer; Shaft Attachment (2):Grip Tight; d:0.7500 in; Bearing Family:Grip Tight Ball Bear; UPC:782475996346; Bearing Duty:Normal Duty; Housing Type:2 Bolt Light Duty Fl; Housing Material:Alloy; Bearing Series:204 Series; Retainer Material:Nylon; Ball Grade:Class 10; Max Bearing Speed:13000 rpm; Bearing Locking Device:Tapered Adapter Slee; Flinger Material:Steel;
A8VO107SR/60R1-NZG05F48 *G* BOSCH REXROTH A8VO Variable Displacement PumpsAnti-Rotation Pin:Yes; Retainer Material:Nylon; Bearing Series:207 Series; Housing Type:2 Bolt Light Duty Fl; Self Aligning:Self Centering; d:1.4375 in; Ball Grade:Class 10; Ball Bearing Housing Series:207 Series; Retainer Type:Std Retainer; Max Bearing Speed:5500 rpm; Flinger Material:None; Housing Material:Zinc; Ball Material:Steel; Flinger Type:None; Seal Type:Single Lip; Bearing Insert Material:Steel;
A8VO160LA1DH2-60R1-NZG05K42-S BOSCH REXROTH A8VO Variable Displacement PumpsBearing Insert Material:Steel; Seal Type:Single Lip; Ball Material:Steel; End Cap Groove:Yes; Bearing Bore Shape:Round; Flinger Type:Standard; Self Aligning:Self Centering; Expansion Type:Non-Expansion; Flinger Material:Steel; Base to Center Height:Not Applicable; Ball Grade:Class 10; Ship Weight:23.56 LB; Bearing Series:218 Series; Bearing Locking Device:Setscrew; Bearing Family:Setscrew Ball Bearin;
A8VO107LA1H2/63R1+A4VG56DE4DT1/32R BOSCH REXROTH A8VO Variable Displacement PumpsBearing Series:205 Series; Self Aligning:Self Centering; Shaft Attachment (2):D-Lock; Grease Type:Unirex N2; Bearing Inner Ring Material:Steel; Bearing Bore Shape:Round; Retainer Type:Std Retainer; Ball Bearing Housing Series:205 Series; Ship Weight:1.9 LB; Flinger Material:Steel; Bearing Family:D-Lock Ball Bearing; Expansion Type:Non-Expansion; Housing Coating:Powder Coat; Bearing Duty:Normal Duty;
A8VO140LA1H2S/63R1-NZG05K010-S BOSCH REXROTH A8VO Variable Displacement PumpsShip Weight:2.7 LB; Ball Grade:Class 24; Self Aligning:Self Centering; Expansion Type:Non-Expansion; Manufacturing Plant Location:Rogersville, TN; Ball Material:440 STAINLESS STEEL; Housing Coating:No Coating; Ring Size:Standard; Bearing Bore Shape:Round; Anti-Rotation Pin:Yes; Bearing Family:Grip Tight Ball Bear; Bearing Series:210 Series; Shaft Attachment (2):Grip Tight; Flinger Material:Stainless Steel;
A8VO107LA1KH1/60R1+ZP 2PRO29 BOSCH REXROTH A8VO Variable Displacement PumpsShaft Attachment (2):D-Lock; Seal Type:Single Lip; d:1.7500 in; Bearing Family:D-Lock Ball Bearing; Manufacturing Plant Location:Rogersville, TN; End Cap Groove:Yes; Housing Coating:Powder Coat; Base to Center Height:Not Applicable; Flinger Type:Rubberized; Ball Material:Steel; Self Aligning:Self Centering; Housing Material:Cast Iron; Bearing Inner Ring Material:Steel; Grease Type:Unirex N2; Retainer Type:Std Retainer;
A8VO107SRZ-61R1-NZG05F041 BOSCH REXROTH A8VO Variable Displacement Pumpsd:2.2500 in; Expansion Type:Non-Expansion; Shaft Attachment (2):Set Screw; Retainer Type:Std Retainer; Ball Bearing Housing Series:212 Series; Bearing Outer Ring Material:Steel; Flinger Material:Steel; Ring Size:Standard; Retainer Material:Nylon; Bearing Inner Ring Material:Steel; Max Bearing Speed:3500 rpm; Housing Coating:Powder Coat; Anti-Rotation Pin:Yes; UPC:782475122912; Grease Type:Unirex N2;
A8VO107-63R1-NZG05F BOSCH REXROTH A8VO Variable Displacement PumpsSeal Type:Single Lip; Bearing Bore Shape:Round; Ship Weight:28.7 LB; Base to Center Height:Not Applicable; Housing Coating:Powder Coat; Shaft Attachment (2):Set Screw; Bearing Family:Setscrew Ball Bearin; Ball Bearing Housing Series:218 Series; Flinger Type:Rubberized; Housing Type:Piloted Flange; Max Bearing Speed:2000 rpm; Flinger Material:Steel; End Cap Groove:Yes; Manufacturing Plant Location:Rogersville, TN;
A8VO140LA1DH2-63R1-NZG05K610-K BOSCH REXROTH A8VO Variable Displacement PumpsDynamic Load Rating:28.1 kN; D:150 mm; Radius:1 mm; Da:143 mm; Oil Holes:2.5 mm; Static Load Rating:50.3 kN; da:126 mm; B:16 mm; d:120 mm;
A8VO160LA1GKH2/60R1-NZG05K42 BOSCH REXROTH A8VO Variable Displacement PumpsRing Size:Standard; Bearing Inner Ring Material:Steel; Flinger Material:Steel; Ball Material:Steel; Flinger Type:Rubberized; Shaft Attachment (2):Set Screw; Base to Center Height:Standard; Bearing Series:210 Series; d:1.7500 in; Retainer Type:Std Retainer; Self Aligning:Self Centering; Ball Bearing Housing Series:210 Series; Ship Weight:5.74 LB; Bearing Outer Ring Material:Steel; Housing Coating:No Coating;
A8VO140LA1KH2/63R1-NZG05F071-K BOSCH REXROTH A8VO Variable Displacement PumpsEnd Cap Groove:No; d:1.4375 in; Flinger Material:None; Bearing Outer Ring Material:Steel; Bearing Inner Ring Material:Steel; Retainer Type:Std Retainer; Ship Weight:3.75 LB; Bearing Insert Material:Steel; Ring Size:Standard; Anti-Rotation Pin:Yes; Seal Type:Single Lip; Ball Material:Steel; Retainer Material:Nylon; Expansion Type:Non-Expansion; Manufacturing Plant Location:Rogersville, TN; Ball Bearing Housing Series:207 Series;
A8VO140LA1H2-63R1-NZG05F07 BOSCH REXROTH A8VO Variable Displacement PumpsSplit Housing:SPLIT; Expansion Type:Non-Expansion; Housing Type:2 Bolt Pillow Block; Bearing Bore Shape:Tapered; Bearing Insert Material:Steel; UPC:782475696475; Shaft Attachment Type:SETSCREW; Base to Center Hight Numeric:2.8800 in; Housing Series:115 SERIES (115 C); Bearing Series:115 Series; Setscrew Angle:65; Bearing Locking Device:Setscrew; d:2.0000 in; Seal Type:Triple Lip; Grease Type:Mobilgrease XHP222;
A8VO107LA1H2/63R1-NZG05F044-S BOSCH REXROTH A8VO Variable Displacement PumpsBearing Duty:Medium Duty; Retainer Material:Nylon; Housing Type:2 Bolt Pillow Block; Bearing Locking Device:Setscrew; Base to Center Height:Standard; End Cap Groove:Yes; Bearing Bore Shape:Round; Bearing Outer Ring Material:Steel; Manufacturing Plant Location:Rogersville, TN; Bearing Series:214 Series; d:2.4375 in; Housing Material:Cast Iron; Ship Weight:13.25 LB; Ball Grade:Class 10; Ball Bearing Housing Series:214 Series;
A8VO200/63R1-NSG05F-S 27031. BOSCH REXROTH A8VO Variable Displacement PumpsManufacturing Plant Location:Crossville, TN - DC; Bearing Insert Material:Nickel-Coated Steel; Ship Weight:0.2 LB; UPC:782475642267; Bearing Bore Shape:Round; Bearing Duty:Normal Duty;
A8VO140LA1S5/63R1-NZG05F07X-S BOSCH REXROTH A8VO Variable Displacement PumpsStatic Load Rating:391.8 kN; D:355 mm; Dynamic Load Rating:207 kN; Da:311 mm; Radius:2 mm; d:250 mm; B:40 mm; Oil Holes:4 mm; da:289 mm;

 

 

No.BrandBdDDadaUPCRadiusChamfer
A8VO107SR3-60R1-PZG05K07BOSCH REXROTH - 25.0000 mm - - - - - -
A8VO160LA1KH2-60R1-NZG05F42BOSCH REXROTH - 2.4375 in - - - 782475699230 - -
A8VO107LA1KH1-60R1-NSG05K04BOSCH REXROTH - 45.0000 mm - - - 782475796304 - -
A8VO107LA1KS/63R1+A4VG71DWDMT1/32R+AZPFFBOSCH REXROTH - - - - - - - -
A8VO107LA0KH3-63R1-NZG05F001-SKBOSCH REXROTH - - - - - 782475991181 - -
A8VO160LA1KH1-60R1-NSG05K04BOSCH REXROTH - 55.0000 mm - - - 782477079313 - -
A8VO107LA1H1/60R1-NSG05XXX-SBOSCH REXROTH - 1.4375 in - - - 782475718276 - -
A8VO107LA1KH2/63R1+AZPF-11-022BOSCH REXROTH - 20.0000 mm - - - - - -
A8VO160LA1GKH2-60R1-NZG05K42BOSCH REXROTH - 4.4375 in - - - 782475035922 - -
A8VO107SR-60R1-NZG05K29BOSCH REXROTH - 1.9375 in - - - 782475115532 - -
A8VO107LGH1/60R1-NSG05N00 *G*BOSCH REXROTH - 2.1875 in - - - 782476479503 - -
A8VO140LA1KH2/63R1-NZG05F071BOSCH REXROTH - - - - - - - -
A8VO107LGDS-60R1-NZG05K04BOSCH REXROTH - - - - - 782476481377 - -
A8VO200LA1KH1/63R1-NSG05F00X-SBOSCH REXROTH35 mm160 mm295 mm238 mm218 mm - - 2 mm
A8VO200LA1KH1/63R1-NZG05F00X-SBOSCH REXROTH - 1.3750 in - - - 782476483210 - -
A8VO200LA1KH1/63R1-NZG05F00X-SBOSCH REXROTH - 0.7500 in - - - 782475996346 - -
A8VO200/63R1-NSG05F-S 27031.BOSCH REXROTH - - - - - 782475642267 - -
A8VO160LGDH2-60R1-NZG05K14BOSCH REXROTH - - - - - 782476480356 - -
A8VO107LA0KH2-63R1-NZG05F001BOSCH REXROTH - 70.0000 mm - - - 782476034023 - -
A8VO200LA0KH3/63R1-NZG05F001BOSCH REXROTH - 3.4375 in - - - 782475037063 - -
A8VO160LA1KH1-60R1-NSG05FBOSCH REXROTH - 20.0000 mm - - - 782476482145 - -
A8VO107SR /60R1-PZG05NBOSCH REXROTH - 3.4375 in - - - 782475035533 - -
A8VO140LA1KH2/63R1-NZG05F014-KBOSCH REXROTH - 4.9375 in - - - 782475964086 - -
A8VO140LA1S/63R1-NZG05F04X-SBOSCH REXROTH - 2.2500 in - - - - - -
A8VO160LXH1-60R1-NZG05K02-SBOSCH REXROTH - 60.0000 mm - - - 782475754984 - -
A8VO107LA1H2-60R1-NZG05K8BOSCH REXROTH - 1.6875 in - - - - - -

 

A8VO107SR3-61R1-NZG05K07 BOSCH REXROTH A8VO Variable Displacement Pumps Video

 

Variable pumps, open circuit | Bosch Rexroth AG

Axial piston variable double pump · A8VO. For machines with multi-circuit operation such as excavators, cranes, drilling equipment; Size 55 …

Axial Piston Variable Double Pump A8VO - Bosch Rexroth

The axial piston variable double pump generates, controls and regulates a hydraulic fluid flow. The A8VO is suitable for direct mounting on the flywheel case ...

Axial piston variable double pump | Bosch Rexroth AG

Axial piston variable double pump. A8VO. For machines with multi-circuit operation such as excavators, cranes, drilling equipment; Size 55 …

Axial piston variable double pump A8VO225 Series 72

Bosch Rexroth AG, RE 93013/03.2014. 4. A8VO Series 72 | Axial piston variable double pump. Hydraulic fluids. Hydraulic fluids. The A8VO variable double pump ...

Mobile hydraulics - Axial piston pumps - Bosch Rexroth

Axial piston variable double pump. A8VO. For machines with multi-circuit operation such as excavators, cranes, drilling equipment; Size 55 …

Axial piston variable double pump - A8VO - Bosch Rexroth

For machines with multi-circuit operation such as excavators, cranes, drilling equipment; Size 55 … 225; Nominal pressure up to 5500 psi; Maximum pressure ...

Variable pumps, open circuit - Mobile hydraulics

Axial piston variable double pump · A8VO. For machines with multi-circuit operation such as excavators, cranes, drilling equipment; Size 55 …

BOSCH REXROTH A8VO107SR3-61R1-NZG05K07 INTERCHANGE

Bosch Rexroth A8VO Variable Displacement Pumps Part series A8VO107SR3-61R1-NZG05K07 is a potential replacement for these common bearing part numbers:

  • A8VO107SR3-61R1-NZG05K07

  • A8VO107SR3-61R1-NZG05K07

  • A8VO107SR3-61R1-NZG05K07

  • A8VO107SR3-61R1-NZG05K07

  • A8VO107SR3-61R1-NZG05K07

  • A8VO107SR3-61R1-NZG05K07

  • A8VO107SR3-61R1-NZG05K07

  • A8VO107SR3-61R1-NZG05K07

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 A8VO107SR3-61R1-NZG05K07 Technical Articles

Are hydraulic pumps directional?
What direction should a hydraulic pump spin? - SidmartinBioOct 2, 2020 — Rotation is indicated on the head of the pump, you'll see an arrow going counter-clockwise. This is the direction you want the pump spinning. If  Hydraulic Pump - an overview |...
How do you adjust a variable displacement pump?
Pressure Compensated Hydraulic Pumps - Womack Machine Radial piston pumps can sometimes be built with variable displacement but do PSI higher than the pressure adjustment of the compensator piston spring to  When and How to Adjust a Load-sensing...
How does a axial piston pump work?
How a Hydraulic Piston Pump Works - Western HydrostaticsFeb 2, 2018 — Axial pumps are referred to as propeller pumps due to their propeller design. These pumps push the flow of fluids in a spiral-like motion along  Piston Pump: Working, Types,...

Bosch Rexroth A8VO Variable Displacement 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 A8VO107SR3-61R1-NZG05K07 Bearing Also Viewed

  • A8VO200LA1KH1/63R1-NZG05F024-S BOSCH REXROTH A8VO Variable Displacement Pumps
  • A8VO200LA1KH1/63R1-NZG05F024-S BOSCH REXROTH A8VO Variable Displacement Pumps
  • A8VO200LA1KH1/63R1-NZG05F024-S BOSCH REXROTH A8VO Variable Displacement Pumps
  • A8VO200LA1KH1/63R1-NZG05F00X-S BOSCH REXROTH A8VO Variable Displacement Pumps
  • A8VO200LA1KH1/63R1-NZG05F00X-S BOSCH REXROTH A8VO Variable Displacement Pumps
 
  • 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