Custom-manufactured in Sarasota, Florida to fit your exact staircase. True-Curve rail with advanced bending technology, 350 lb weight capacity, and Harmar's industry-leading fast turnaround.
The Harmar CSL500 Helix is engineered around a True-Curve rail with advanced bending technology — custom-made to match your staircase's exact geometry, then installed with a lighter chassis and simple-connect rail system for a smooth, quiet ride.
Precision bends and tight turns hug the staircase's exact geometry for smoother turns and a more compact profile.
Every CSL500 is engineered and built to order at Harmar's Florida facility — with the fast turnaround times Harmar is known for.
Ships and installs non-handed — the same lift works on either side of your staircase, simplifying installation.
Higher than the Flow X (275 lb) and most other curved stair lifts on the market.
| Weight capacity | 350 lbs (159 kg) — among the highest for a curved lift |
|---|---|
| Drive system | Rack & pinion gear |
| Rail | True-Curve, steel powder-coated with advanced bending technology |
| Track length | 20' standard; up to 164' maximum |
| Minimum folded width | 14.37" (365mm) |
| Travel speed | 20 feet per minute |
| Incline range | Up to 45° |
| Power | 120 VAC 15A (240 VAC optional); 24V DC battery operation |
| Battery backup | Up to 10 round trips per charge (varies with load and length) |
| Swivel seat | Standard manual swivel at upper landing |
| Armrests | Full-fold (simplifies wheelchair transfer) |
| Seat | Ergonomic contoured with premium upholstery |
| Seat belt | Standard retractable |
| Controls | Armrest control (interchangeable left or right hand) + wireless remote controls |
| Safety systems | Directional limit switches, final limit switch, footrest obstruction switch, seat swivel cut-off, constant pressure controls, safety edges, side-positioned emergency stop |
| Installation | Symmetrical lift — ships and installs non-handed; mounts to steps, not wall |
| Standard colors | Beige (default) or black; custom colors and fabric available |
| Outdoor variant | Available with weather-resistant materials for exterior staircases |
| Certifications | Complies with ASME A18.1, CAN/CSA B44.1, ASME A17.5 |
| Manufactured in | Sarasota, Florida, USA (Harmar Mobility, LLC) |
The lift itself — chair, carriage, motor, drive system
Custom-built True-Curve rail, engineered to your exact staircase
Two wireless remote controls
Standard retractable seat belt
Battery backup system, pre-installed
Professional installation by factory-trained technician
On-site operation training
Lifetime warranty activation
disables operation when removed (child safety and privacy)
to clear doorways or walkways at the bottom of stairs
for extended length or complex multi-story configurations
beyond standard beige and black
weather-resistant materials and protective coatings for exterior staircases
We measure your staircase and give you a real quote on the spot.
30 minYour rail is engineered and built to order at Harmar's facility in Sarasota, Florida.
2–3 weeksFactory-trained technician installs and calibrates the lift.
4–6 hrsOperation and safety training for you and your household.
Same dayYour 24/7 line and warranty are active from day one.
Day oneA quick look at how our four lifts compare.
| Lift | Staircase | Capacity | Drive system | Special feature | Made in | Best for |
|---|---|---|---|---|---|---|
| Nautilus Premium Stair Lift | Straight | 350 lbs | Grease-free worm | Narrowest fold (10.5") | USA | Standard straight stairs |
| Nautilus Heavy Duty Stair Lift | Straight | 600 lbs | Grease-free worm | 600 lb capacity | USA | Heavier users, straight stairs |
| Flow X Curved Stair Lift | Curved | 275 lbs | Rack & pinion | ASL auto-swivel | International | Narrow, spiral, or steep curved staircases |
| Harmar CSL500 Helix Curved | Curved | 350 lbs | Rack & pinion | True-Curve rail | USA (Sarasota, FL) | Curved staircases, US-made preference |
Yes — the modular rail system is custom-built to fit your exact staircase, including 90° turns, 180° turns, spiral configurations, intermediate landings, and multi-story applications. The rail can be built up to 164 feet in total length.
True-Curve is Harmar’s proprietary rail-bending technology that produces precision curves matching your staircase’s exact geometry. Combined with the rack-and-pinion drive, it delivers smoother turns and a more compact profile that mounts closer to the wall than most curved stair lifts.
Harmar has among the fastest turnaround times in the industry for custom curved lifts. From your approved quote to installation is typically 2–3 weeks — significantly faster than Europe-manufactured curved lifts, which can take 4–6 weeks. Installation itself is usually completed in less than a day.
Yes. Harmar makes an outdoor variant of the CSL500 Helix with weather-resistant materials and protective coatings, designed for exterior staircases like porches, decks, or building entries. Ask about the outdoor version during your assessment.
The lift runs on 24V battery power at all times, with the standard 120VAC outlet just providing the charge. A fully charged battery gives you approximately 10 round trips during an outage.
Traditional Medicare (Part A/B) does not cover stair lifts. Some Medicare Advantage plans, long-term care insurance policies, VA benefits, and state Medicaid waivers may contribute toward the cost. We can walk through your options during your free assessment.
Our lifetime warranty is tied to the original purchaser at the original installation address, which is the industry standard. Because the Helix is custom-built to a specific staircase, relocating it typically requires either significant rail modifications or a new custom rail — we can quote those options separately.
In their own words
Two customers on what changed the day their lift went in.
"It's very easy to use."
— Nautilus customer
"It's great. [Installation] was very quick!"
— Nautilus customer
A 30-minute visit gets you a measured stairway, a fixed price, and no obligation.
Call (801) 421-3299Restoring freedom, one stair at a time.