• HF1 Flail Hammers
    Regular price £19.87
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    HF1 Flail Hammers

    Key Features

    • Compatibility: t1 rev ; t3 ; t5 heads
    • Tool type: hammer ; fits fr50 ; fs50 rotors
    • Mounting: bolt-on to rotor lug spacing
    • Typical use: grass ; scrub with stone tolerance
    • Heat treatment: austempered steel for impact resistance
    Regular price £19.87
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Tiger Cut 300E Bolt Kit for Replacement Knife
    Regular price £241.98
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    • Delivery to UK & Ireland

    Tiger Cut 300E Bolt Kit for Replacement Knife

    Key Features

    • Model: Tiger Cut 300E
    • Type: replacement knife
    • Material: hardened tool steel
    • Use: timber cutting on saw grapple
    • Notes: replace as balanced set
    Regular price £241.98
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Tiger Cut 250E Bolt Kit for Replacement Knife
    Regular price £24.06
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    • Delivery to UK & Ireland

    Tiger Cut 250E Bolt Kit for Replacement Knife

    Key Features

    • Model: Tiger Cut 250E
    • Type: replacement knife
    • Material: hardened tool steel
    • Use: timber cutting on saw grapple
    • Notes: replace as balanced set
    Regular price £24.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Tiger Cut 250E Replacement Knife
    Regular price £812.06
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    • Delivery to UK & Ireland

    Tiger Cut 250E Replacement Knife

    Key Features

    • Model: Tiger Cut 250E
    • Type: replacement knife
    • Material: hardened tool steel
    • Use: timber cutting on saw grapple
    • Notes: replace as balanced set
    Regular price £812.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Adam Hindle

    Sales Director

    I began my engineering career at Stockport College in around 2005, first completing a National Diploma in Electrical Engineering, followed by a Higher National Diploma in Mechanical Engineering. I then progressed to the University of Salford, where I earned a BEng (Hons) degree in Mechanical Engineering.

    After graduating, I started my professional career with Approved Hydraulics. I initially gained a combination of hands-on workshop experience and telephone-based sales experience. In later years, I moved into a full-time sales role and led the new crane and excavator attachments department that the company had recently established.

  • Tiger Cut 210E Bolt Kit for Replacement Knife
    Regular price £24.06
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    • Delivery to UK & Ireland

    Tiger Cut 210E Bolt Kit for Replacement Knife

    Key Features

    • Model: Tiger Cut 210E
    • Type: replacement knife
    • Material: hardened tool steel
    • Use: timber cutting on saw grapple
    • Notes: replace as balanced set
    Regular price £24.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Tiger Cut 210E Replacement Knife
    Regular price From £680.06
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    • Delivery to UK & Ireland

    Tiger Cut 210E Replacement Knife

    Key Features

    • Model: Tiger Cut 210E
    • Type: replacement knife
    • Material: hardened tool steel
    • Use: timber cutting on saw grapple
    • Notes: replace as balanced set
    Regular price From £680.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T-CUT30 Bolt Kit for Replacement Knife
    Regular price £25.02
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    • Delivery to UK & Ireland

    T-CUT30 Bolt Kit for Replacement Knife

    Key Features

    • Model: T-CUT30
    • Type: replacement knife
    • Material: hardened steel
    • Use: cutting vegetation ; saw style head
    • Notes: replace in matched sets ; observe torque for bolts
    Regular price £25.02
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T-CUT25 Bolt Kit for Replacement Knife
    Regular price £28.86
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    • Delivery to UK & Ireland

    T-CUT25 Bolt Kit for Replacement Knife

    Key Features

    • Model: T-CUT25
    • Type: replacement knife
    • Material: hardened steel
    • Use: cutting vegetation ; saw style head
    • Notes: replace in matched sets ; observe torque for bolts
    Regular price £28.86
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T-CUT18 Bolt Kit for Replacement Knife
    Regular price £24.06
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    • Delivery to UK & Ireland

    T-CUT18 Bolt Kit for Replacement Knife

    Key Features

    • Model: T-CUT18
    • Type: replacement knife
    • Material: hardened steel
    • Use: cutting vegetation ; saw style head
    • Notes: replace in matched sets ; observe torque for bolts
    Regular price £24.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T-CUT40 Bolt Kit for Replacement Knife

    POA

    • All Items Guaranteed
    • Delivery to UK & Ireland

    T-CUT40 Bolt Kit for Replacement Knife

    Key Features

    • Model: T-CUT40
    • Type: replacement knife
    • Material: hardened steel
    • Use: cutting vegetation ; saw style head
    • Notes: replace in matched sets ; observe torque for bolts

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • T-CUT18 Replacement Knife
    Regular price £491.06
    • All Items Guaranteed
    • Delivery to UK & Ireland

    T-CUT18 Replacement Knife

    Key Features

    • Model: T-CUT18
    • Type: replacement knife
    • Material: hardened steel
    • Use: cutting vegetation ; saw style head
    • Notes: replace in matched sets ; observe torque for bolts
    Regular price £491.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T-CUT25 Replacement Knife
    Regular price £812.06
    • All Items Guaranteed
    • Delivery to UK & Ireland

    T-CUT25 Replacement Knife

    Key Features

    • Model: T-CUT25
    • Type: replacement knife
    • Material: hardened steel
    • Use: cutting vegetation ; saw style head
    • Notes: replace in matched sets ; observe torque for bolts
    Regular price £812.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T-CUT40 Replacement Knife - Approved Hydraulics Limited
    Regular price £1,372.07
    • All Items Guaranteed
    • Delivery to UK & Ireland

    T-CUT40 Replacement Knife

    Key Features

    • Model: T-CUT40
    • Type: replacement knife
    • Material: hardened steel
    • Use: cutting vegetation ; saw style head
    • Notes: replace in matched sets ; observe torque for bolts
    Regular price £1,372.07
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Bearing Support for Group 2 Pump
    Regular price £90.56
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    • Delivery to UK & Ireland

    Bearing Support for Group 2 Pump

    Key Features

    • Pump group: External gear pump ; Group 2
    • Shaft options: Ø18 mm parallel 6 mm key ; Ø22 mm parallel ; 1/8 taper
    • Radial load capacity: ≈318 daN at 1500 rpm
    • Rated lifetime: ≈3500 h at 1500 rpm at rated load
    • Lubrication: Grease to DIN 51502 MPF 1K-20
    • Mounting: Direct flanged between drive and pump ; takes belt or chain side load
    • Typical use: Protects pump bearings in pulley ; sprocket ; belt drives
    Regular price £90.56
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Neck Strap
    Regular price £115.97
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    • Delivery to UK & Ireland

    Scanreco Neck Strap

    Key Features

    • Type: scanreco radio remote component
    • Compatibility: rc400 series
    • Use: proportional control ; machine remote operation
    • Note: model specific details per part number
    • Service: consult oem manual for wiring
    Regular price £115.97
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Control Unit Programming Cable (5m)
    Regular price £118.36
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    • Delivery to UK & Ireland

    Scanreco Control Unit Programming Cable (5m)

    Key Features

    • Type: control unit programming cable
    • Length: 5 m
    • Connector: dedicated programming connector
    • Compatibility: RC400 control units
    • Use: configure receiver and system parameters
    Regular price £118.36
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Banjo Tubes - Approved Hydraulics Limited
    Regular price From £17.24
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    • Delivery to UK & Ireland

    Banjo Tubes

    Key Features

    • Type: banjo tube
    • Function: compact 90 degree fluid path at joint
    • Use: space constrained hydraulic connections
    • Thread: per selection
    • Material: steel
    Regular price From £17.24
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1 1/2" Male/Female Low Pressure Ball Valve
    Regular price £143.77
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    • Delivery to UK & Ireland

    1 1/2" Male/Female Low Pressure Ball Valve

    Key Features

    • Type: low pressure ball valve
    • Ports: 1/2" bsp
    • Pressure: suitable for return or suction lines
    • Use: isolate low pressure circuits
    • Body: nickel plated brass or steel
    • Seal: ptfe seats
    Regular price £143.77
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" Quick Release Coupling (Screw Type, Male)
    Regular price £62.22
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    • Delivery to UK & Ireland

    1" Quick Release Coupling (Screw Type, Male)

    Key Features

    • Type: screw to connect quick release coupling male
    • Port size: 1"
    • Benefit: connects under residual pressure
    • Use: high pressure attachments and tools
    • Standard: screw to connect design
    • Pressure: high impulse rated per series
    Regular price £62.22
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Filter Housing with Element
    Regular price £98.64
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    • Delivery to UK & Ireland

    Scanreco Filter Housing with Element

    Key Features

    • Type: filter housing with replaceable element
    • Function: protects servo or hydraulic circuit from contamination
    • Service: quick element replacement
    • Mounting: panel or chassis bracket per kit
    • Use: extend life of proportional modules and valves
    Regular price £98.64
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 45L FW Lever Operated Monoblock Valve (3/8"BSP)
    Regular price £62.46
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    45L FW Lever Operated Monoblock Valve (3/8"BSP)

    Key Features

    • Type: 45l lever operated monoblock valve
    • Ports: 3/8" bsp
    • Spools: double acting sections
    • Relief: adjustable main relief
    • Use: mobile attachments ; tipper ; agricultural circuits
    Regular price £62.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" Port, Straight, 51mm PCD, Female Gear Pump Adaptors
    Regular price £13.07
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    • Delivery to UK & Ireland

    3/4" Port, Straight, 51mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: straight
    • Port: 3/4"
    • Mounting: 3/4 hole on 51 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £13.07
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" Port, 90°, 3 Hole, 51mm PCD, Female Gear Pump Adaptors
    Regular price £19.04
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    • Delivery to UK & Ireland

    1" Port, 90°, 3 Hole, 51mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: per selection
    • Mounting: 3 hole on 51 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £19.04
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Z80 Single Acting Spool

    POA

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    • Delivery to UK & Ireland

    Z80 Single Acting Spool

    Key Features

    • Type: z80 single acting spool for sectional valve
    • Function: selects porting for motor or single acting cylinder
    • Use: configure z series valve bank per function
    • Material: hardened spool with precision grinding
    • Service: replace or build specific sections

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice

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Common Calculations FAQs

Calculating force, speed, pressure, power, and efficiency in hydraulic applications.

How do you calculate actuator speed?

Actuator speed is determined by flow rate and cross-sectional area:

Speed = Flow rate ÷ Area

Flow rate is the volume of fluid delivered (in L/min or GPM).

Area is the cross-sectional area of the actuator piston: π × (diameter ÷ 2)².

How do you calculate cylinder force?

Cylinder force can be calculated using:

Force = Pressure × Area

Pressure is the system pressure (in psi or bar).

Area is the cross-sectional area of the cylinder bore (in square inches or square centimeters).

Area = π × (bore diameter ÷ 2)².

How do you calculate pressure drop across a valve?

Pressure drop can be calculated using the valve flow coefficient (Cv):

Pressure Drop (ΔP) = (Flow Rate)² ÷ (Cv² × Fluid Density)

Flow Rate is the fluid flow (in GPM or L/min).

Cv is the valve flow coefficient.

Fluid Density is the density of the hydraulic fluid.

How do you size an accumulator?

Accumulator sizing considers required flow, pressure, and pre-charge:

Accumulator Volume = Flow Rate × Time ÷ Pressure

This determines how much fluid must be stored to maintain system pressure.

How to convert psi to bar?

Use the conversion factor: 1 bar = 14.5 psi.

To convert psi to bar, divide psi by 14.5.

Example: 200 psi ÷ 14.5 = 13.79 bar.

What is pre-charge pressure in an accumulator?

Pre-charge pressure is the initial gas pressure in the accumulator before fluid enters.

It helps maintain system pressure as the accumulator discharges.

Typically set to 70–80% of system operating pressure.

What is specific gravity of hydraulic fluid?

Specific gravity is the ratio of hydraulic fluid density to water.

A value of 1 means equal density.

Less than 1 means the fluid floats; greater than 1 means it sinks.

What is torque in a hydraulic motor?

Torque is the rotational force produced based on system pressure and motor displacement:

Torque = Pressure × Displacement ÷ 2π

Pressure is the operating system pressure.

Displacement is the volume displaced per revolution (in cubic inches or cubic centimeters).

What unit is hydraulic power measured in?

Hydraulic power is measured in horsepower (HP) or kilowatts (kW).

Hydraulic horsepower can be calculated using:

HP = (Pressure (psi) × Flow rate (GPM)) ÷ 1714.

What’s the relationship between pump speed and flow?

Flow rate is directly proportional to pump speed.

If pump speed doubles, flow rate doubles (assuming constant displacement).

This is important when adjusting flow or selecting a pump for varying speeds.