Kelston Actuation Ltd - Standard J Screw Jacks

Lifting loads of up to 224,809 (1000kN) and beyond can be accommodated, along with customizable travel speeds and torque requirements to meet your objectives. Although not part of our modular range, we can help you devise custom solutions that enable them to run as synchronized systems.

Complete Customization

These classic Screw Jacks typically feature a precision worm gear set with a powerful, steel lead screw. They can be configured for either a translating or rotating linear motion, with either an upright or inverted lifting orientation.

We can machine castings from either durable cast iron or corrosion resistant stainless steel – utilizing either machine screws or ball screws for varying lifting requirements.

J04 (100kN Nominal Capacity) Screw Jacks

• Jack Types: Translating (TS), Rotating (RS)
• Lifting Orientation: Upright or Inverted
• Lifting Screw: Tr55 single of double start thread
• Gear Ratio: Hi ratio 24:1 - Lo ratio 8:1
• Gear Centres: 66mm
• Travel speed and torque requirements see data sheet

J051 (100kN Nominal Capacity) Screw Jacks

• Jack Types: Translating (TS), Rotating (RS)
• Lifting Orientation: Upright or Inverted
• Lifting Screw: Tr65 single of double start thread
• Gear Ratio: Hi ratio 24:1 - Lo ratio 6:1
• Gear Centres: 66mm
• Travel speed and torque requirement see data sheet

J05 (200kN Nominal Capacity) Screw Jack

• Jack Types: Translating (TS), Rotating (RS)
• Lifting Orientation: Upright or Inverted
• Lifting Screw: Tr65 single of double start thread
• Gear Ratio: Hi ratio 24:1 - Lo ratio 6:1
• Gear Centres: 80mm
• Travel speed and torque requirement see data sheet

J06 (300kN Nominal Capacity) Screw Jacks

• Jack Types: Translating (TS), Rotating (RS)
• Lifting Orientation: Upright or Inverted
• Lifting Screw: Tr95 single of double start thread
• Gear Ratio: Hi ratio 32:1 - Lo ratio 10.66:1
• Gear Centres: 95.3mm
• Travel speed and torque requirement see data sheet

J07 (500kN Nominal Capacity) Screw Jacks

• Jack Types: Translating (TS), Rotating (RS)
• Lifting Orientation: Upright or Inverted
• Lifting Screw: Tr110 single of double start thread
• Gear Ratio: Hi ratio 32:1 - Lo ratio 10.66:1
• Gear Centres: 135mm
• Travel speed and torque requirement see data sheet

J08 (750kN Nominal Capacity) Screw Jacks

• Jack Types: Translating (TS), Rotating (RS)
• Lifting Orientation: Upright or Inverted
• Lifting Screw: Tr125 single of double start thread
• Gear Ratio: Hi ratio 32:1 - Lo ratio 10.66:1
• Gear Centres: 160mm
• Travel speed and torque requirement see data sheet

J09 (1000kN Nominal Capacity) Screw Jacks

• Jack Types: Translating (TS), Rotating (RS)
• Lifting Orientation: Upright or Inverted
• Lifting Screw: Tr150 single of double start thread
• Gear Ratio: Hi ratio 36:1 - Lo ratio 12:1
• Gear Centres: 190mm
• Travel speed and torque requirement see data sheet