Electric Cylinders 20 Ton
ECAL820, ECAL2420, ECAM820, ECAM2420, ECAH820, ECAH2420, ECBL820, ECBL2420
These Joyce electric cylinders lift and position up to 20 tons, achieve travel speeds up to 109 inches per minute, and raise loads up to 100 inches. They are well suited for industrial environments where protection of the lifting screw mechanism is critical and low maintenance is desired. Requiring only electric power, Joyce electric cylinders may also be used in place of hydraulic cylinders, eliminating the cost and potential for leaks associated with hydraulic systems.
- 20 ton capacity available in a variety of ratios and leads
- Standard, Motor mount, and ComDRIVE models are available
- Ground and hard-chrome plated inner tubes, alloy steel input shafts
- All models with efficiencies ≥ 30% require a brake motor to hold position
- Joyce Dayton can customize electric cylinders to your specifications
Complete dynamic speed/load ratings and maximum rise information can be viewed on our quick reference chart. Both acme (ECA) and ball screw (ECB) electric cylinder actuator models are designed to operate at the charted capacities under both tension and compression loading.
Joyce/Dayton offers motor controls ranging from simple Motor Starters to complex positioning systems and Custom controls. Every system that is powered by an electric motor requires a control system. At Joyce, we know that choosing the best option can sometimes be a challenge. That’s why our Engineers are available to help you through the process.
Sample Part Number:
Click on the part number to reveal additional informaton about jack designs and shaft codes.
Important Note: Electric Cylinders that are ≥ 30% efficient may lower under load. Brake motors or external locking systems are required.
Tube End Conditions
Rise is travel expressed in inches and not the actual tube length. The allowable travel for each unit is listed in the Quick Reference section. Allowable lengths differ for vertical and horizontal mounting.
Left Side Shaft Code
Right Side Shaft Code
Optional Shaft Codes
Screw Stops and Boots
Screw stops are optional on machine screw jacks. When specified, the closed height of the jack and/or the protection tube length may be increased. When boots are added to machine screw jacks, the closed height of the jack may be increased.
Note: Contact Joyce/Dayton for availability and options.
Not recommended for cylinders that are ≥ 30% efficient.
POTC=0-10V w/2 switches*
POTD=4-20MA w/2 switches*
*Optional IP65 rating available
Encoders and Electronic Liit Switches
ELS2=2 Position Electronic Switch
ELS4=4 Position Electronic Switch
ELS6=6 Position Electronic Switch
|Ordering Example: P2 (Moutning Positions) A (Ratio) C (Motor code from chart below)|
MMA A (Motor code from chart above)
Standard motor adapters are aluminum
All standard motors are 3-phase, 208-230/460 VAC or 230/460 VAC. Specify the appropriate motor size from the chart above. Refer to the "Additional Options" chart on the preceding page as needed. Brake motors are required for electric cylinders that are more than 30% efficient. Contact Joyce/Dayton options that are not listed.
Mechanical Limit Switches
LA (Models) 1(Number of DPDT Switches) 3(Available Positions)
Number of DPDT Switches
NOTE: Will always be 0 for LS7 models
|LS8-402||LA||Left Side Shaft Options|
|LS9-503||LD||Right Side Shaft Options|
To order additional options, use these part numbers
Female Clevis Bracket
Clevis Pin w/ retaining rings
Female Rod Clevis
- X=Standard Jack, no additional options
- S=Additional Specification Required (comment as necessary)
- F1=Do Not Paint
- F2=Epoxy Paint
- F3=Outdoor Paint Process
- M1=Less Motor
- M2=Brake Motor
- M3=Single Phase Motor (120VAC)
- M4=50Hz Motor
- H1=High Temperature Operation
- H2=Food Grade
- Specify as many options as needed
|Model||Static Capacity||Screw Diameter||Thread Pitch/Lead||Worm Gear Ratio||Worm Shaft Turns for 1" Travel||Tare Torque (Inches Lbs.)||Starting Torque (Inches Lbs.)||Operating Torque (Inches Lbs.)||Translating Tube Torque (Inches Lbs.)||Base Weight||Weight
per Inch Travel
|ECAL820||20 ton||2 1/2||.25 pitch
|ECAL2420||20 ton||2 1/2||.25 pitch
|ECAM820||20 ton||2 1/2||.5 pitch
|ECAM2420||20 ton||2 1/2||.5 pitch
|ECAH820||20 ton||2 1/2||.375 pitch
|ECAH2420||20 ton||2 1/2||.375 pitch
|ECBL820||20 ton||2 1/4||.5 lead ball||8:1||16||60||.026W*||.020W* @
|ECBL2420||20 ton||2 1/4||.5 lead ball||24:1||48||40||.014W*||.009W* @
Important Note: Electric cylinders that are ≥ 30% are not self-locking. Brake motors or external locking systems are required.
*W: Load in pounds.
Tare Torque: Initial torque to overcome seal and normal assembly drag. This value must be added to starting torque or operating torque values.
Starting Torque: Torque value required to start moving a given load (dissipates to operating torque values once the load begins moving).
Operating Torque: Torque required to continuously raise a given load at the input RPM listed.
Translating Tube Torque: Torque required to resist tube rotation.
Lead: The distance traveled axially in one rotation of the lifting screw.
Pitch: The distance from a point on a screw thread to a corresponding point on the next thread, measured axially.