Harmar SL600/SL600HD: Pinnacle Premium Stairlift
The Pinnacle Premium Stair Lift is the industry's most compact residential stairlift, offering a clean, grease-free ride with its patented worm gear drive system.

Premium Performance You Deserve
You deserve to have access to every floor in your home. The Pinnacle SL600 is here to help you take back your freedom. With a lifting capacity of 350 lbs, this straight stairlift provides riders with the confidence to go up and down their stairs safely and comfortably.
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 lbs, this seat is here to ensure you have a secure and comfortable ride to the next floor.
Enjoy your rides between floors as the helical worm gear does all the work for you, grease and lubrication-free!
The narrowest stairlift in the market, Pinnacles can also accommodate up to 350 lb—or 600 lb for our SL600HD—with a comfortable seat. Our lifts can fold as narrow as 10.5” when not in use.
In the event of a power outage, you won’t be stranded on the stairs. Pinnacles are designed to provide up to 60 trips if a power outage occurs.
SL600/SL600HD Pinnacle Premium Stairlift Key Features
INDUSTRY'S NARROWEST PROFILE
RELIABLE IN A POWER OUTAGE
CLEAN & LOW-MAINTENANCE
SMOOTH & QUIET RIDE
INTUITIVE OPERATION
COMFORTABLE & SAFE SEATING
AUTOMATIC SAFETY SENSORS
POWERFUL & EASY OPTIONS
CUSTOMIZABLE ACCESSORIES
Frequently Asked Questions
SL600/SL600HD Pinnacle Premium Stairlift Specifications
Pinnacle Premium Stair Lift Measurement and Compatibility Guide
Measuring your stairway correctly is essential to ensuring that your new stair lift will install easily and function safely and properly. Please follow the instructions below carefully.

Mount Side: From the bottom of your staircase looking up, determine on which side you want the lift installed. Because the lift mounts to the stairs and not the wall, you may choose either side.

Measurement A - Top to Bottom: Stand at the top of your stairs and extend your tape measure down the staircase. The tape measure should lightly touch each stair tread and the tip should touch the landing at the bottom of the stairs. The measurement should be from the front edge (nose) of the top landing to the floor at the bottom landing.
Measurement B - Top to First Step: Measure from the front edge (nose) at the top of the landing to the front edge (nose) of the first step.

Measurement C - Stair Tread Length: Measure the tread of a stair from front edge (nose) of a stair to back.
Measurement D - Stair Rise Height: Measure the rise of a stair by measuring the length from the front edge (nose) of one step straight down to the next tread.
Number of Risers: Count the number of stair risers on your staircase.

Measurement E - Top Obstruction Distance: Measure the distance from the front edge of the top step to any obstruction on the top landing. Common obstructions include doors, walls or railings.
Measurement F - Bottom Obstruction Distance: Measure the distance from the front edge of the bottom stair to any obstruction on the bottom landing.

Measurement G - Stair Width: Measure the width of the stairs from side to side.
Pinnacle Premium Stairlift Options and Accessories
Pinnacle Premium Stairlift Video
Pinnacle Premium Stairlift Downloads
Pinnacle Premium Stair Lift by Harmar Buyer’s Guide
The Pinnacle Premium Stair Lift by Harmar is an advanced residential stair lift system designed to assist individuals with limited mobility in navigating stairs safely and independently. Built with a compact design and patented drive system, the Pinnacle Premium offers quiet, efficient, and low-maintenance operation for straight staircases in home settings.
Pinnacle Premium Stair Lift Ultra-Compact Folding Design
The Pinnacle Premium Stair Lift features a slim profile when folded, extending less than 11 inches from the wall. This compact footprint maximizes stairway clearance for other users, making it ideal for narrow residential staircases and shared household environments.
Patented Worm Drive System
Equipped with Harmar’s patented worm gear drive system, the stair lift delivers smooth and reliable travel with reduced maintenance needs. The system operates without belts, pulleys, or chains, resulting in quiet movement and greater long-term durability.
Harmar Pinnacle Premium Stair Lift Durable Construction
The Pinnacle Premium lift is built with lightweight, aircraft-grade aluminum rail and durable composite components. It supports users up to 350 pounds while maintaining a total installed weight of just over 100 pounds, which minimizes structural load on the staircase.
Continuous Charging Strip
The Harmar Pinnacle Premium stair lift uses a continuous charging system along the entire rail, ensuring that the lift’s batteries stay charged at any location. This eliminates the need for docking stations and provides uninterrupted access even during power outages.
Pinnacle Premium Stair Lift Comfortable, Adjustable Seat
The Stair Lift by Harmar includes a contoured, padded seat with adjustable height settings. The seat swivels at the top landing for safe entry and exit, and comes with retractable seat belts and fold-up armrests for added safety and space-saving.
Safety Sensors and Emergency Features
The Pinnacle Premium lift includes built-in safety sensors that detect obstructions on the stairs and automatically stop the unit to prevent accidents. Manual lowering and raising functions allow for operation during power failures, ensuring user safety in all conditions.
Simple Remote Operation
The Pinnacle Premium includes two wireless remote controls for convenient call/send functionality. Users or caregivers can summon or park the lift with minimal effort, making it easier to coordinate use between multiple individuals in the household.
Easy Installation for Straight Staircases
Designed specifically for straight indoor stairways, the Pinnacle Premium stair lift requires minimal home modification. Its modular rail system ensures a secure and efficient installation process, typically completed in just a few hours by a trained technician.
Pinnacle Premium Stair Lift by Harmar Review
The Pinnacle Premium Stair Lift by Harmar is widely praised for its smooth, quiet performance and compact design. Users appreciate the continuous charge system and minimal maintenance requirements, while installers note the ease of setup and durable rail construction. Its user-friendly design makes it a reliable mobility solution for anyone needing safe stair access at home.
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LIMITED LIFETIME WARRANTY
PRODUCTS COVERED: SL600 SERIES MODELS
WARRANTY COVERAGE:
- Harmar Mobility warrants the Pinnacle SL600 series to be free of defects in material, mechanical in the motor, gearbox, rail, worm gear and gear rack for the lifetime of the product from the date of retail purchase.
- Harmar’s other parts and electrical components are warranted for three (3) years.
- Supplied batteries are limited to one (1) year from the date of retail purchase.
EXCLUSIONS
- Pinnacle SL600’s installed outdoors are not covered and are not approved for outdoor use.
- SL600’s installed in commercial buildings are not covered and are not approved for commercial use.
- This warranty does not cover maintenance or adjustments.
- Harmar will not be charged for labor, consequential damage, or repair expenses.
- Harmar will not be liable for the loss of the use of its products or loss of time.
- This warranty becomes null and void if the product has been lost, damaged by accident, over-stressed, misused and/or neglected, or if the product has been modified in any way.
RETURN PROCEDURE
- Defective parts must be returned, prepaid, to Harmar for inspection before credit, repair, or replacement, at Harmar’s discretion.
Harmar’s sole obligation and the exclusive remedy under this warranty are limited to credit, repair, or replacement as deemed appropriate by Harmar.