Description
Xiolift Xizi otis car door knife XTA2702AAE XTA-CS02L1=57 67 72 78 Brief Introduction
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Product Name
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Xiolift Xizi otis car door knife |
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Model
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XTA2702AAE XTA-CS02L1=57 67 72 78
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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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Xiolift Xizi Otis Car Door Knife XTA2702AAE – The Precision Blade That Unlocks Quiet, Reliable Door Motion
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, a slim, hardened-steel blade slides silently between the door locks — releasing the mechanical latch and allowing the operator to pull the panels apart. That blade is the XTA2702AAE car door knife, originally engineered by Xizi Otis for centre-opening passenger doors. Measuring 270 mm long, 2 mm thick and factory-balanced to ±0.5 g, it guarantees a smooth, chatter-free release even after 3 million cycles. Nanjing Zhuye Elevator Parts keeps factory-sealed knives in anti-static stock for next-day despatch. Below we explain what the knife does, how to install it in under ten minutes, and the replacement cycle that prevents expensive “door lock jam” call-backs.
1. What XTA2702AAE Really Is
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Material: 65Mn spring steel, hardened to HRC 48-52, zinc-nickel plated (8 µm) for 96 h salt-spray resistance
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Dimensions: 270 L × 24 W × 2 T mm — fits 800–1,100 mm clear-opening centre doors
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Geometry: 15° bevel both edges, 0.2 µm Ra surface — low friction, no galling
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Balance: factory-balanced to ±0.5 g — eliminates vibration at 2.5 m/s door speed
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Fixings: 2 × M6 stainless countersunk screws, captive washers, Loctite pre-applied
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Weight: 95 g — 30 % lighter than generic knives, reducing operator inertia
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Pack unit: 1 knife + 2 screws + 1 × 2 mm Allen key + installation card
The knife slides between the lock rollers, forcing them apart and releasing the door panels within 40 ms of operator activation.
2. Where It Is Used
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Xizi Otis SkyRise®, Gen2-R2®, Xiolift super-MRL 1.75–4.0 m s⁻¹
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Mitsubishi LEGY, KONE EcoDisc™ retrofits using Xizi lock 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 all 270 mm centres
3. Installation – 10-Minute Retrofit
Safety: place lift on inspection, lock main breaker, tag out, prop door to 50 % open.
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Remove old knife — undo 2 M6 screws; slide blade out of operator fork.
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Inspect fork — if worn >0.5 mm, replace fork (Nanjing Zhuye part FK-270-SS).
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Insert new knife — locate dowel pin; push until flush against fork face.
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Tighten screws — torque 8 N·m; check blade sits parallel to lock rollers.
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Apply 1 drop of PTFE oil — no grease bath; steel is self-lubricating.
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Run 5 cycles — listen for clicking; measure release force <15 N by spring scale.
No special tools, no machining, no balancing — screw and slide.
4. Daily Operation – What the Knife Actually Does
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Releases lock rollers within 40 ms of operator signal
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Absorbs side thrust during emergency stop; prevents lock rebound
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Zinc-nickel plating releases micro-film, keeping rollers polished
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Balanced mass reduces operator vibration by 3 dB at 2.5 m/s
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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-speed office (>1,500 door cycles day⁻¹) – inspect every 3 months, replace knife every 3 years
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Residential tower (400–800 cycles day⁻¹) – inspect every 6 months, replace every 5 years
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Low-rise freight (≤200 cycles day⁻¹) – inspect annually, replace every 7 years
Replace immediately if:
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Blade thickness <1.8 mm (20 % reduction)
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Bevel edge chipped >1 mm or bent >0.5 mm
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Release force >25 N (spring-scale test)
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Galvanic corrosion spots >2 mm Ø
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Operator vibration >65 dB(A) at 1 m during release
6. Extending Life – 3 Pro Tips
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Keep roller gap 2–3 mm; smaller gap increases wear, larger gap causes incomplete release
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Clean knife monthly; brake-dust paste acts like grinding compound
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Never grease—plating is self-lubricating; excess grease attracts grit
7. Why Buy XTA2702AAE from Nanjing Zhuye Elevator Parts?
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Factory-new 65Mn, not recycled steel; passes 3-million-cycle wear test
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Zinc-nickel plated 8 µm; salt-spray 96 h — no rust in coastal shafts
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Dual stock: 8,000 pcs Nanjing, 2,500 pcs Dubai — next-day to 65 countries
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Bundle kit: knife + 2 SS screws + 2 mm Allen key — 5 % cheaper than single OEM piece
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24 months warranty against cracking or abnormal wear
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7×24 WhatsApp/WeChat video support; average response 10 minutes
Conclusion
The XTA2702AAE door knife is the unseen blade that unlocks every ride. A single chipped edge can cause lock jams, callbacks and one-star reviews. Stock a spare from Nanjing Zhuye on every service truck, swap it on schedule, and replace “door lock jam” panic with a five-minute planned fix — one smooth, silent release at a time.
