Description
KONE Toshiba Otis Elevator door rubber bumpers rubber door stopper bumpers rubber cabinet door bumpers Door Anti-collision Rubber Brief Introduction
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Product Name
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KONE Toshiba Otis Elevator Door Bean Hall Door Anti-collision Granules Anti-collision Rubber Shock-absorbing Bean Rubber Pad Cushion Pad Accessories |
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Model
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No |
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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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Elevator Door Rubber Bumpers – The Silent Guards That Turn Every Door Closure into a Whisper
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Passengers judge an elevator by how quietly and smoothly the doors close. Hidden behind the leading edge of each door panel, elevator door rubber bumpers (also called door buffers or door stops) absorb the final impact, prevent metal-on-metal clatter and protect the door operator from mechanical shock. Whether you manage a high-speed office lift or a heavy-duty freight car, these inexpensive elastomer blocks are your first line of defence against noise, wear and costly call-backs. Nanjing Zhuye Elevator Parts keeps thousands of oil-resistant bumpers in stock for same-day despatch. Below we explain what the bumpers do, how to install them in under five minutes, and the replacement cycle that turns “door bang” complaints into a two-minute planned fix.
1. What Door Rubber Bumpers Really Are
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Material: oil-impregnated NBR 75 Shore-A, UV-stabilised, -30 °C to +80 °C
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Types:
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Flat bumper 50 × 30 × 10 mm—for centre-opening passenger doors
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D-profile bumper 60 × 20 mm radius—for heavy freight doors
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Cone bumper M10 × 25 mm—for narrow door stiles
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Fixing: M4, M6 or M10 stainless screw, captive washer, Loctite pre-applied
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Colour: standard black; grey or blue available for modernisation aesthetics
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Pack unit: 4 bumpers + 4 screws + 1 × 2 mm Allen key
The bumper compresses 1–2 mm on impact, absorbing kinetic energy and reducing noise by 8 dB(A).
2. Where They Are Used
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Otis, Mitsubishi, Thyssen, KONE, Schindler passenger elevators 800–1,400 mm clear opening
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Machine-room-less (MRL) or machine-room (MR) installations
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Freight elevators up to 5,000 kg capacity
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New build or modernisation—one size fits all door mechanics
3. Installation – 5-Minute Retrofit
Safety: place lift on inspection, lock main breaker, tag out, prop door to 50 % open.
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Remove old bumper—undo one screw; scrape off adhesive residue with plastic blade.
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Clean surface—IPA wipe to remove oil and dust; allow 30 s to dry.
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Position new bumper—align with impact mark on opposite stile; gap 1–2 mm when doors closed.
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Tighten screw—torque 1.5 N·m (M4) or 3 N·m (M6); check compression 1 mm by feeler gauge.
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Run 5 cycles—listen for impact noise; adjust position if metal touches metal.
No special tools, no machining, no adhesive—screw and compress.
4. Daily Operation – What the Bumpers Actually Do
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Absorb final 5 mm of door travel; reduce impact force by 60 %
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Protect paint and stainless from dents and scratches
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Dampen vibration; cut acoustic noise 8 dB at 1 m
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Oil-impregnated rubber releases micro-film, preventing squeaks
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Temperature expansion 0.04 mm/°C—no binding in outdoor scenic lifts
5. Replacement Cycle & Preventive Maintenance
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High-traffic office (>1,500 door cycles day⁻¹) – inspect every 3 months, replace bumpers every 18 months
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Residential tower (400–800 cycles day⁻¹) – inspect every 6 months, replace every 3 years
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Low-rise freight (≤200 cycles day⁻¹) – inspect annually, replace every 5 years
Replace immediately if:
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Thickness compressed >30 % (measure with calipers)
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Surface cracked >2 mm deep or chunk missing >10 mm²
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Screw rusted or Loctite washed out
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Door noise >65 dB(A) at 1 m during close
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Bumper hardness >90 Shore-A (uv-hardened)
6. Extending Life – 3 Pro Tips
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Keep gap 1–2 mm; larger gap increases impact energy
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Clean bumpers monthly; brake-dust paste acts like sandpaper
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Never grease—rubber is self-lubricating; excess grease attracts grit
7. Why Buy Door Bumpers from Nanjing Zhuye Elevator Parts?
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Factory-new NBR 75 Shore-A, not recycled rubber; passes 50,000-cycle impact test
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Stainless screws salt-spray 48 h—no rust in coastal shafts
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Dual stock: 20,000 pcs Nanjing, 6,000 pcs Dubai—next-day to 65 countries
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Bundle kit: 4 bumpers + 4 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
Door rubber bumpers are the unsung heroes that absorb tonnes of impact every day yet never ask for attention—until they crack. Stock a handful from Nanjing Zhuye on every service truck, swap them on schedule, and replace “door bang” complaints with a two-minute planned fix — one quiet, gentle close at a time.
