Deck & Dash Hardware - Hatch Actuators and Rams

How to Order the Best Replacement Hatch Actuator

Getting the best replacement actuator for an old Acculift or similar Actuator is easy. Follow these steps and compare these features to get the best bang for your buck.

Step 1: Measure the center to center on the two mounting holes of your current actuator while closed.

Step 2: Measure the center to center on the two mounting holes of your current actuator while fully open.

The difference in these measurements is the stroke length. Actuators are measured by stroke length, for example an 18" actuator will travel 18" fully closed to fully open.

Step 3: Compare the features below and select an actuator of the correct stroke length. Check the dimensions on the product page to make sure the actuator will fit under your hatch when fully closed!

Hardin HMMA2

SSA / Stainless

Feature Comparison

Dynamic Load Limit of 550 lbs. Dynamic Load Limit of 400 lbs.
Billet Aluminum Black Anodized Tube Housing Polished Stainless Tube Housing
Double Speed Motor (1.5"/sec) Standard Speed Motor
12", 18" and 24" Models 12", 16", 18" and 24" Stroke Models
BUY: 12"18"24" BUY: 12"16"18"24"
HMMA2 Series 12 Inch Stroke Replacement Electric Hatch Actuator
Your Price:
$469.99

HMMA2 Series 12 Inch Stroke Replacement Electric Hatch Actuator

620-922012

Hardin HMMA2 series linear hatch actuator / hatch lift / hatch ram is the proven choice for applications requiring a durable, long life solution. Specifically designed for harsh working environments, the HMMA2 linear actuator is ideal for use in heavy-duty Marine installations .  This linear actuator has been certified for applications requiring IP66D compliance and USCG approval. Its IP66D protection  ensures it will withstand high temperature, high pressure water jets and the ingress of dust and other solid contaminants. This has also passed the 500 hour salt spray test . The HMMA2 linear actuator is DC power and a ball screw design. Features load limiting clutch or limit switches. Improved speed and torque over Acme screw designs. We are stocking three replacement lengths 12,18 and 24" for more information view our installation instructions.

  • These are a direct replacement for 12" stroke Dana-Warner, Thomson, Livorsi brand 
  • Actual ram travel stroke is 10.39" 
  • Travels 1.5" per second under load, almost twice as fast as competing brands
  • Spindle type "Ball Screw"
  • Voltage: 12v DC
  • Functions for Limit switches at full retracted/extended positions to cut current to prevent damage
  • Overload clutch Standard on all models
  • IP rating - IP66D
  • UL73, EMC Certificate
  • USCG approved
  • Tinned Leads
  • Safe working dynamic load limit of 550 lbs.*
  • Billet black anodized extrusion shaft housing

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


HMMA2 Series 18 Inch Stroke Replacement Electric Hatch Actuator
Your Price:
$479.99

HMMA2 Series 18 Inch Stroke Replacement Electric Hatch Actuator

620-922018

Hardin HMMA2 series linear hatch actuator / hatch lift / hatch ram is the proven choice for applications requiring a durable, long life solution. Specifically designed for harsh working environments, the HMMA2 linear actuator is ideal for use in heavy-duty Marine installations .  This linear actuator has been certified for applications requiring IP66D compliance and USCG approval. Its IP66D protection  ensures it will withstand high temperature, high pressure water jets and the ingress of dust and other solid contaminants. This has also passed the 500 hour salt spray test . The HMMA2 linear actuator is DC power and a ball screw design. Features load limiting clutch or limit switches. Improved speed and torque over Acme screw designs. We are stocking three replacement lengths 12,18 and 24" for more information view our installation instructions.

  • These are a direct replacement for 18" stroke Dana-Warner, Thomson, Livorsi brand 
  • Actual ram travel stroke is 16.38"
  • Travels 1.5" per second under load, almost twice as fast as competing brands
  • Spindle type "Ball Screw"
  • Voltage: 12v DC
  • Functions for Limit switches at full retracted/extended positions to cut current to prevent damage
  • Overload clutch Standard on all models
  • IP rating - IP66D
  • UL73, EMC Certificate
  • USCG approved
  • Tinned Leads
  • Safe working dynamic load limit of 550 lbs.*
  • Billet black anodized extrusion shaft housing

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


HMMA2 Series 24 Inch Stroke Replacement Electric Hatch Actuator
Your Price:
$489.99

HMMA2 Series 24 Inch Stroke Replacement Electric Hatch Actuator

620-922024

Hardin HMMA2 series linear hatch actuator / hatch lift / hatch ram is the proven choice for applications requiring a durable, long life solution. Specifically designed for harsh working environments, the HMMA2 linear actuator is ideal for use in heavy-duty Marine installations .  This linear actuator has been certified for applications requiring IP66D compliance and USCG approval. Its IP66D protection  ensures it will withstand high temperature, high pressure water jets and the ingress of dust and other solid contaminants. This has also passed the 500 hour salt spray test . The HMMA2 linear actuator is DC power and a ball screw design. Features load limiting clutch or limit switches. Improved speed and torque over Acme screw designs. We are stocking three replacement lengths 12,18 and 24" for more information view our installation instructions.

  • These are a direct replacement for 24" stroke Dana-Warner, Thomson, Livorsi brand 
  • Actual ram travel stroke is 22.4" 
  • Travels 1.5" per second under load, almost twice as fast as competing brands
  • Spindle type "Ball Screw"
  • Voltage: 12v DC
  • Functions for Limit switches at full retracted/extended positions to cut current to prevent damage
  • Overload clutch Standard on all models
  • IP rating - IP66D
  • UL73, EMC Certificate
  • USCG approved
  • Tinned Leads
  • Safe working dynamic load limit of 550 lbs.*
  • Billet black anodized extrusion shaft housing

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


4 Inch Stroke Electric Hatch Actuator
Your Price:
$452.99

4 Inch Stroke Electric Hatch Actuator

730-SSA4

  • 4" Stroke.
  • Overall Length Closed is 11-7/8".
  • Strong eyelet mount allows a wide range of angles for easy installation.
  • Marine grade stainless steel housing
  • Sealed precision die cast housing.
  • 12 VDC
  • Safe working dynamic load limit of 400 lbs.*
  • Static Limit of 500 lbs.*
  • Heavy duty, sealed ball bearing motor allows for locking of hatches, won’t open at high speeds
  • NOTE: Please verify your dimensions. Actuators that have been installed are NON returnable!

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


8 Inch Stroke Electric Hatch Actuator
Your Price:
$465.99

8 Inch Stroke Electric Hatch Actuator

730-SSA8

  • 8" Stroke.
  • Overall Length Closed is 15-7/8".
  • Strong eyelet mount allows a wide range of angles for easy installation.
  • Marine grade stainless steel housing
  • Sealed precision die cast housing.
  • 12 VDC
  • Safe working dynamic load limit of 400 lbs.*
  • Static Limit of 500 lbs.*
  • Heavy duty, sealed ball bearing motor allows for locking of hatches, won’t open at high speeds
  • NOTE: Please verify your dimensions. Actuators that have been installed are NON returnable!

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


12 Inch Stroke Electric Hatch Actuator
Your Price:
$629.99

12 Inch Stroke Electric Hatch Actuator

620-920120

  • 12" Stroke.
  • Overall Length Closed is 19-7/8".
  • Strong eyelet mount allows a wide range of angles for easy installation.
  • Marine grade stainless steel housing
  • Sealed precision die cast housing.
  • 12 VDC
  • Safe working dynamic load limit of 400 lbs.*
  • Static Limit of 500 lbs.*
  • Heavy duty, sealed ball bearing motor allows for locking of hatches, won’t open at high speeds
  • Replaces Livorsi SSA12 actuator.
  • NOTE: Please verify your dimensions. Actuators that have been installed are NON returnable!

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


16 Inch Stroke Electric Hatch Actuator
Your Price:
$589.99

16 Inch Stroke Electric Hatch Actuator

730-SSA16

  • 16" Stroke.
  • Overall Length Closed is 22-3/8".
  • Strong eyelet mount allows a wide range of angles for easy installation.
  • Marine grade stainless steel housing
  • Sealed precision die cast housing.
  • 12 VDC
  • Safe working dynamic load limit of 400 lbs.*
  • Static Limit of 500 lbs.*
  • Heavy duty, sealed ball bearing motor allows for locking of hatches, won’t open at high speeds
  • NOTE: Please verify your dimensions. Actuators that have been installed are NON returnable!

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


24 Inch Stroke Electric Hatch Actuator
Your Price:
$699.99

24 Inch Stroke Electric Hatch Actuator

620-920024

  • 24" Stroke.
  • Overall Length Closed is 31-1/4".
  • Strong eyelet mount allows a wide range of angles for easy installation.
  • Marine grade stainless steel housing
  • Sealed precision die cast housing.
  • 12 VDC
  • Safe working dynamic load limit of 400 lbs.*
  • Static Limit of 500 lbs.*
  • Heavy duty, sealed ball bearing motor allows for locking of hatches, won’t open at high speeds
  • Replaces Livorsi SSA24 actuator.
  • NOTE: Please verify your dimensions. Actuators that have been installed are NON returnable!

*Static loading refers to the load on an actuator when it is in a fixed or stationary condition. The static load capacity of an actuator refers to how much weight the actuator can safely hold without back driving or causing damage. Dynamic load is the load the actuator sees when it is powered and extending or retracting. The dynamic load capacity of an actuator refers to how much the actuator can push or pull. Placing an actuator closer to the hatch hinge point will require the actuator to work harder than installing it further out.


18" Stroke Super Duty Hydro-Hatch Lift, 500 Pound Moving Capacity
Your Price:
$629.99

18" Stroke Super Duty Hydro-Hatch Lift, 500 Pound Moving Capacity

620-921018

  • Marine grade stainless steel & aluminum construction
  • 12 DC sealed electric motors, 2-wire simple hook-ups
  • Compact Size, Light Weight, for Maximum Lifting Capacity
  • Two Standard Length Cylinders with Simple Pin Mounts
  • Heavy Duty Aluminum Clevis Mounts for Hatch and Stringer
  • Smooth Quiet Responsive Hydraulic Action with No-Coasting
  • Moving Capacity 500 lbs. on horizontal surface. Will lift 250lb hatch when mounted vertically.
  • 1” Cylinder. 
  • System is virtually maintenance free
  • Operating Temperatures 10 to 165 Degrees F
  • System can Operate with Environmentally Responsible Fluid
  • 18" Model  Dimensions: 26” Retracted Length, 44” Extended Length.
  • NOTE: The 620-920016 is only bracket kit that will work with this ram. Most Brackets, pins and accelerators sold separately in the section WILL NOT WORK with this actuator. 

24" Super Duty Hydro-Hatch Lift, 900 Pound Lifting Capacity
Your Price:
$639.99

This Part has options, please click the button below to order.

24" Stroke Super Duty Hydro-Hatch Lift, 500 Pound Moving Capacity

620-921024

  • Marine grade stainless steel & aluminum construction.
  • 12 DC sealed electric motors, 2-wire simple hook-ups.
  • Compact Size, Light Weight, for Maximum Lifting Capacity.
  • Two Standard Length Cylinders with Simple Pin Mounts.
  • Heavy Duty Aluminum Clevis Mounts for Hatch and Stringer.
  • Smooth Quiet Responsive Hydraulic Action with No-Coasting.
  • Moving Capacity 500 lbs. on horizontal surface. Will lift 250 lb hatch when mounted vertically.
  • 1” Cylinder. 
  • System is virtually maintenance free.
  • Operating Temperatures 10 to 165 Degrees F.
  • System can Operate with Environmentally Responsible Fluid.
  • 24" Model Dimensions: 32” Retracted Length, 56” Extended Length.
  • NOTE: The 620-920016 is only bracket that will work with this ram. Most Brackets, pins and accelerators sold separately in the section WILL NOT WORK with this actuator. 

Dual Actuator Accelerator
Your Price:
$139.99

Actuator Accelerator Relay

620-434

  • For use with Single or Dual Actuator.
  • Transfers the electric load from your dash accessories to the accelerator box, increasing the total voltage to the hatch actuator is greatly increased.
  • Accelerates hatch opening and closing.

Motor Reversing Module
Your Price:
$45.99

This Part has options, please click the button below to order.

Motor Reversing Module

620-436

This module changes the direction of the motor, and dynamic breaking stops the motor when the switch returns to “OFF”. The low profile is perfect for tighter spaces and the hardware is completely corrosive resistant. It’s ideal for tarp or lift applications, as well as for hoists, hatches, winches, slowpows, intake/exhaust fans, vehicle outriggers, and other reversing applications.


Hatch Ram Stop Collar
Your Price:
$52.99

Hatch Ram Stop Collar

620-920013

  • Lessens stress put on mounting bracket.
  • Prevents damage to your mounting bracket.
  • Stops the hatch ram from over-contracting.

Hydraulic Hatch Ram Stop Collar
Your Price:
$32.99

Hydraulic Hatch Ram Stop Collar

620-921013

  • Lessens stress put on mounting bracket.
  • Prevents damage to your mounting bracket.
  • Stops the hatch ram from over-contracting.
  • Only to be used on 620-921018 and 620-921024.

ID: 1 1/4”
OD: 5/8”

Hatch Actuator Mounting Bracket
Your Price:
$29.99

Hatch Actuator Mounting Bracket

620-920010

  • Highly polished heavy gauge stainless steel.
  • Sold Each.
  • Fits Hardin Marine hatch actuators.
  • Includes a 1/2" stainless steel actuator mounting bolt, washers and locknut.
  • Fasteners for mounting the bracket to the boat and hatch are NOT included.

Hatch Actuator Mounting Bracket
Your Price:
$19.99

Hatch Actuator Mounting Bracket for Hydraulic Rams

620-920016

  • Highly polished heavy gauge stainless steel.
  • Sold Each.
  • Fits Hardin Marine hydraulic hatch actuators.
  • Includes a 1/2" stainless steel actuator mounting bolt, washers, bushings and locknut.
  • Fasteners for mounting the bracket to the boat and hatch are NOT included.

Hatch Actuator Mounting Bracket and Extension Kit
Your Price:
$64.99

Hatch Actuator Mounting Bracket and Extension Kit

620-920015

  • Highly polished heavy gauge stainless steel.
  • Fit Hardin Marine hatch actuators.
  • Extension is adjustable from 1 to 3 inches longer.
  • ID of extension tube is 1-1/8"
  • Fasteners for mounting the bracket to the boat and hatch are NOT included.
  • Use with our hatch rams 620-920018, 620-920024, 730-SSA4, 730-SSA8, 730-SSA12, 730-SSA16.

Hatch Ram Extension
Your Price:
$38.99

Hatch Ram Extension

620-920014

  • Extension is adjustable from 1 to 3 inches longer.
  • Comes with mounting hardware.
  • Extension for our hatch rams 620-920018, 620-920024, 730-SSA4, 730-SSA8, 730-SSA12, 730-SSA16.
  • Inside Diameter is 1.150"

Hatch Ram Replacement Electric Motor
Your Price:
$39.99

Hatch Ram Replacement Electric Motor

620-920005

Replacement electric motor only. Fits many Livorsi hatch ram, Warner Hatch ram, Hardin Hatch ram and Thomson Hatch ram models. Mounting Bolt Center to Center is 2"

NOTE: These are NEW "Old Stock" Items and are NON-RETURNABLE. Make sure this will fit your application before purchasing!


Hatch Ram Quick Release Pin
Your Price:
$23.99

Hatch Actuator Quick Release Pin

620-920011

  • Stainless steel pin and billet aluminum handle.
  • Designed to be used in conjunction with the Hardin Marine hatch rams and mounting brackets.
  • Quick and easy way to release the hatch ram for hatch removal or full range opening.
  • Can also be used to release the hatch ram in the event of battery failure provided you have an access panel within easy reach of the pin.