• JHF Offers Gast MVP Series Rotary Vane Air Motors
    Apr 3

    JHF Offers Gast MVP Series Rotary Vane Air Motors

    GAST MVP rotary vane air motors, with planetary gear reduction, provide a compact and durable solution for fine speed control and high torque output...
  • Why Choose John Henry Foster St. Louis?
    Dec 12

    Why Choose John Henry Foster St. Louis?

    John Henry Foster Company of St. Louis is the Midwest's leading, full-service provider of fluid power and automation. With over 75 years in the...
  • John Henry Foster’s On-site Retail Store
    Dec 5

    John Henry Foster’s On-site Retail Store

    When you need something quick...or, you're not sure what you need, visit John Henry Foster's convenient, on-site retail store. With an extensive, on-hand inventory...
  • Value Added Services by John Henry Foster
    Oct 21

    Value Added Services by John Henry Foster

    JHF helps add value to your bottom line! Custom assemblies, by JHF, are designed to help you decrease inventory, labor, and hassle. Call today...
  • Reducing Scrap Rate and Cycle Time
    Oct 14

    Reducing Scrap Rate and Cycle Time

    Check-out what JHF and DT Engineering are doing to help reduce scrap rate and cycle time! [wdac-youtube id="H489F_7YThY"]

More Properties

      Air Compressors

      Our associates are empowered to perform at the highest level of quality so that we meet and exceed expectations.

      Learn More
      Value Added

      Our associates are empowered to perform at the highest level of quality so that we meet and exceed expectations.

      Learn More
      Hydraulic

      Our associates are empowered to perform at the highest level of quality so that we meet and exceed expectations.

      Learn More
      Tool & Hoist Repair

      Our associates are empowered to perform at the highest level of quality so that we meet and exceed expectations.

      Learn More
      Units Converter

      Our associates are empowered to perform at the highest level of quality so that we meet and exceed expectations.

      Learn More
      Get in Touch   Contact Us
      Calculate Driven Sprocket Speed

      Enter Drive Speed, Drive Sprocket Diameter and Driven Sprocket Diameter to calculate Driven Speed

      Get Started
      Calculate Gear Pump Estimated Displacement

      Enter Gear Outside Diameter, Gear Width and Gear Center Distance to calculate Gallons Per Minute (GPM) @ 1200 RPM.

      Get Started
      Calculate Angled Hydraulic Cylinder PUSH-PULL

      Enter the Cylinder Bore diameter, PSI, Rod Diameter and Angle to calculate PUSH/PULL for a hydraulic cylinder mounted at an angle

      Get Started
      Calculate Driven Sprocket Diameter

      Enter Drive Speed, Drive Sprocket Diameter and Driven Speed to calculate Driven Sprocket Diameter

      Get Started
      Calculate Hydraulic Cylinder PUSH/PULL

      Enter the Cylinder Bore diameter, PSI and Rod Diameter to calculate PUSH/PULL for a hydraulic cylinder

      Get Started
      Calculate V-Belt Length

      Enter Pulley Center Distance, Large Pulley Diameter and Other Pulley Diameter to calculate V-Belt Length

      Get Started
      Calculate Sprocket Drive Speed

      Enter Drive Sprocket Diameter, Driven Speed and Driven Sprocket Diameter to calculate Drive Speed

      Get Started
      Calculate Vehicle Speed

      Enter the Wheel Outside Diameter (not the rim size) and Axle RPM to calculate Vehicle Speed

      Get Started
      Calculate Reservoir Capacity – Cylindrical

      Enter the Reservoir Diameter and Length or Height to calculate Cylindrical Tank Capacity in cubic inches/gallons

      Get Started
      Calculate Hydraulic Motor Horsepower

      Enter the GPM and PSI (pressure) to calculate Horsepower

      Get Started
      Calculate Reservoir Capacity – Rectangle

      Enter the Reservoir Length, Width and Height to calculate Rectangular Tank Capacity in cubic inches/gallons

      Get Started
      Calculate Hydraulic Cylinder Speed

      Enter the Pump GPM, Cylinder Bore diameter, Stroke and Rod Diameter to calculate Cylinder Speed (Do not use fractions)

      Get Started
      Calculate Input/Exhaust Volumes For Rephasing Cylinders

      Calculate Input/Exhaust Volumes to match the exhaust volume from one cylinder to the input volume of the next cylinder in a series

      Get Started
      Get in Touch   Contact Us