Pinnacle Heavy-duty Stairlift

Harmar stairlift chair
Harmar stairlift chair Woman using a stairlift Person operating a stairlift remote control A Harmar's stairlift chair's operating light Harmar stairlift seat with black padding A Harmar stairlfit char's seatbelt fastened A beige Harmar stair lift Harmar's Stairlift Chair


Pinnacle Heavy-duty Stairlift

  • Homes (Residential)
  • Commercial

Need a lift? The Pinnacle SL600HD is here to help you take that step towards accessing every floor in your home. With a higher lifting capacity of 600 lb, this seat is here to ensure you have a secure and comfortable ride to the next floor.

  • No grease or lubrication equals no mess! Cleaner for you, your home, and pets.
  • Efficient motor with a nylon polymer gear/worm drive provides a smooth ride and up to 60 up and down cycles on batteries during a power outage.
  • The high-backed, extra wide chair, stationary armrests, and reinforced footrest offer stability for rides and transfers.
  • Safety first! Buckle up with the retractable seat belt for a safer trip up and down your stairs.
Higher backrest for optimal
support and comfort
Oversized footrest for more
comfort and security
Operating control in the armrest.
Safety sensors on chassis and
footrest stop lift when an
obstruction is present
Seat belt for a more secure
ride up and down your stairs
Remote control to
call or send your seat
Seat swivels 85° at the upper landing for easy exit or transfer.


  • Industry-best 600 lb capacity
  • Seat swivels 85° at the upper landing for easy dismount or transfer
  • Up to 40' of travel
  • Patented helical worm gear drive system for a smooth and quiet ride
  • Low Maintenance
  • Operating control in the armrest
  • Comfortable, plush upholstered seat
  • Safety sensors in the footrest and chassis will stop the lift if it meets an onstruction
  • Options/Accessories: Key lock to protect against unauthorized use
  • Weight capacity
    600 lb (272 kg)
  • Incline Limits
    27° - 48° (inclines above 45° may require local jurisdiction approval)
  • Speed
    14 FPM
  • Folded Width
    16.5" from wall
  • Track Length
    15'6" standard; up to 40'
  • Seat size
    18.5" x 14"
  • Drive System
    • Patented nylon polymer gear rack
    • Helical worm gear
  • Outdoor
  • Safety Features
    • 85° seat swivel interlock
    • Centrifugal overspeed brake
    • Footrest obstruction sensors
    • Lockable battery and breaker switch
    • Motor break
    • Obstruction sensors
    • Seat belt
  • Options
    • Key lock
    • Extra rail
    • Manual lowering tool
No Accessories Available.

Available Documents & Literature

Warranty : 3-Year Parts
10-Year on Gear Rack
1-Year Battery

Get assistance from your local knowledgeable
Harmar dealer!

Consultations are available over the phone, online, or in person.

“I can safely access both floors in my home with my stairlift. It allows me to move comfortably in and out of my chair with its swivel seat and sturdy armrests.”

“I feel unstoppable now that I have a lift I can trust to get me safely from floor to floor. And with the key lock, I know my granddaughter is safe when she comes over – no unexpected trips on the steps for her!”

“Now that I’ve been using my stairlift, I can’t imagine going back. I used to sit on the stairs and scoot either up or down the steps to get to where I wanted to go. I can enjoy the ride now!”

Factors to Consider before Making a Decision

The Pinnacle straight stairlifts are designed to fit any straight staircase without curves to the structure or landings. When not in use, our SL600HD lifts stand about 17” from the wall, still allowing household members and guests to easily access the stairway.
At Harmar, we understand everyone has different needs. We offer three different sizes in our stairlifts: SL300, SL600, and SL600HD. The SL600 seat provides a more comfortable chair with a larger backrest, while the SL300 offers a smaller, more compact and narrower seat. Which will best suit your lifestyle and home?