Description
Thyssenkrupp Elevator S200 door spring K200 K300 Brief Introduction
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Product Name
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Thyssenkrupp Elevator S200 door spring |
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Model
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K200 K300
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Thyssenkrupp S200 Door Spring K200 / K300 – The Silent Counter-Balance That Keeps Every Door Gliding
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Every time a passenger presses the door-open button, the visible panels glide effortlessly — but behind the scenes, a torsion spring is doing the heavy lifting. The Thyssenkrupp S200 Door Spring K200 / K300 is the factory-calibrated counter-balance that offsets door weight, reduces motor torque by 30 % and ensures the door can still be opened manually during a power failure. Nanjing Zhuye Elevator Parts keeps factory-sealed K200 and K300 springs in anti-static stock for next-day despatch. Below we explain what the springs do, how to install them in under 20 minutes, and the replacement cycle that prevents expensive “door heavy” call-backs.
1. What K200 / K300 Door Springs Really Are
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Material: music-grade chrome-vanadium steel, shot-peened, zinc-nickel plated
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Torque Rating: K200 = 200 Nm, K300 = 300 Nm (±3 %)
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Outer Diameter: 48 mm (K200), 58 mm (K300)
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Wire Diameter: 4.5 mm (K200), 5.5 mm (K300)
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Active Coils: 12 (K200), 14 (K300)
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Temperature Range: -30 °C to +80 °C — outdoor scenic lifts included
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Pack Unit: 1 spring + 2 split cones + 1 × 2 mm Allen key + torque chart
The spring is pre-tensioned during installation and locked with split-cone adapters, eliminating the need for external counterweights.
2. Where They Are Used
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Thyssenkrupp S200, S300, S500 door operators 800–1,400 mm clear width
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Otis Gen2-R2®, SkyRise® retrofits using S200 geometry
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Machine-room-less (MRL) or machine-room (MR) centre-opening doors
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New build or modernisation — one part number fits any S200 header
3. Installation – 20-Minute Retrofit
Safety: place lift on inspection, lock main breaker, tag out, prop door to 50 % open.
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Remove old spring — undo 2 M8 set-screws; slide worn spring off torsion shaft.
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Inspect shaft — if scoring >0.2 mm, polish with 600-grit emery or replace shaft.
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Slide new spring — align split cones with shaft flats; hand-tighten screws.
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Pre-tension — turn spring 1/4 turn (K200) or 1/3 turn (K300) using 2 mm Allen key.
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Tighten screws — torque 12 N·m; check door balances at mid-travel.
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Run 5 cycles — measure motor current; verify <70 % of name-plate value.
No special tools beyond Allen key and torque wrench—follow EN 81-20.
4. Daily Operation – What the Springs Actually Do
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Offset 70 % of door weight; motor torque reduced by 30 %
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Allow manual opening during power failure (<50 N hand force)
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Zinc-nickel plating releases micro-film, preventing corrosion seizure
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Shot-peened surface eliminates micro-cracks, extending fatigue life
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Temperature range -30 °C to +80 °C — outdoor scenic lifts included
5. Replacement Cycle & Preventive Maintenance
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High-traffic office (>1,500 cycles day⁻¹) – inspect every 6 months, replace springs every 4 years
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Residential tower (300–600 cycles day⁻¹) – inspect annually, replace every 6 years
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Low-rise freight (≤200 cycles day⁻¹) – inspect every 18 months, replace every 8 years
Replace immediately if:
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Torque loss >10 % (spring balance test)
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Visible cracks >1 mm or corrosion pits >0.2 mm
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Door hand-force >100 N at mid-travel
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Motor current >80 % of name-plate value
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Shaft scoring >0.5 mm under spring contact
6. Extending Life – 3 Pro Tips
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Keep pre-tension within ±5 %; over-torsion halves fatigue life
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Clean springs monthly; brake-dust paste acts like grinding paste
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Never grease—zinc-nickel plating is self-lubricating; excess attracts grit
7. Why Buy K200 / K300 from Nanjing Zhuye Elevator Parts?
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Factory-new chrome-vanadium, not recycled steel; passes 1,000,000-cycle fatigue test
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Pre-torqued and shot-peened — no re-tensioning after 3 months
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Dual stock: 5,000 pcs Nanjing, 2,000 pcs Dubai — next-day to 65 countries
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Bundle kit: spring + split cones + torque chart — 5 % cheaper than single OEM piece
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24 months warranty against torque loss or breakage
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7×24 WhatsApp/WeChat video support; average response 10 minutes
Conclusion
The Thyssenkrupp S200 door spring K200 / K300 is the unseen counter-balance that carries tonnes of door weight every day—yet never asks for attention until it breaks. Stock a spare set from Nanjing Zhuye on every service truck, swap them on schedule, and replace “door heavy” complaints with a twenty-minute planned fix — one balanced, silent entrance at a time.
