Description
Xizi Otis guide shoe roller LG SIGMA elevator guide shoe wheel 125*22*6303 Brief introduction
| Xizi Otis guide shoe roller LG SIGMA elevator guide shoe wheel | |
| Brand | Original |
| Model | 125*22*6303 |
| Goods No. | PE2401 |
| MOQ | 1 |
| Warranty Time | 1 year |
| Certificates | ISO9001 |
| Brand | Xizi Otis LG SIGMA |
Elevator Guide Shoes Roller 125×22×6303 – The Heavy-Duty 125 mm Wheel That Keeps High-Speed Lifts Gliding Safely
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
In a high-rise elevator, every second of smooth, silent travel depends on components passengers never see—like the guide-shoe roller hidden in the car-top frame. The 125×22×6303 is the largest, highest-capacity roller in the WECO/Otis family: 125 mm diameter, 22 mm tread width, running on a sealed 6303 bearing. Designed for 2.5–4.0 m s⁻¹ gearless machines and loads up to 2,500 kg, it turns lateral forces into quiet rotation and keeps the car perfectly aligned with every landing. Nanjing Zhuye Elevator Parts keeps factory-sealed rollers in anti-static stock for next-day despatch. Below we explain what the roller does, how to install it in under fifteen minutes, and the replacement cycle that prevents expensive “car shake” call-backs.
1. What 125×22×6303 Really Is
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Outer diameter: 125 mm × 22 mm tread — fits 16–19 mm rail web
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Material: oil-impregnated PU 94 Shore-A on steel hub — coefficient of friction 0.18, self-lubricating
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Bearing: sealed 6303-2RS, 17 mm bore, grease-filled for -30 °C to +80 °C
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Load rating: 6.5 kN static, 3.3 kN dynamic per roller — suits cars up to 2,500 kg
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Temperature range: -25 °C to +70 °C — outdoor scenic lifts included
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Pack unit: 1 roller + 2 circlips + M12 shoulder bolt + 2 mm Allen key
The roller is pressed against the rail web by an eccentric cam; three rollers per car and three per counter-weight form a quiet, friction-free triangle.
2. Where It Is Used
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Otis SkyRise®, Gen2-R2® 2.5–4.0 m s⁻¹ with PM machines 35–55 kW
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Mitsubishi NEXIEZ-S, LEGY heavy-duty scenic lifts
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Thyssen TWIN® double-deck cars
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Chinese super-MRL controllers with 16–19 mm guide rails
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Suitable for cars and counter-weights up to 2,500 kg
3. Installation – 15-Minute Swap
Safety: place lift on inspection, lock main breaker, tag out, prop car.
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Remove old roller — undo M12 shoulder bolt; slide worn roller off eccentric pin.
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Inspect pin — if scoring >0.2 mm, polish with 600-grit emery or replace pin.
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Hand-press new 125 mm roller until circlip seats flush; ensure 0.05–0.10 mm preload on rail.
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Apply 1 drop of PTFE spray — no grease bath needed; PU is self-lubricating.
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Tighten bolt — torque 55 N·m; spin by hand — smooth rotation, no lateral play.
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Run car on inspection — listen for rattling; adjust eccentric until pull force <5 N.
No special tools, no machining, no shims — the 125 mm roller is self-aligning.
4. Daily Operation – What the Roller Actually Does
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Carries lateral forces from passenger imbalance, wind or earthquake sensors
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Absorbs rail irregularities; reduces car vibration by 8 dB compared with sliding guides
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Oil-impregnated PU releases micro-film, keeping rail polished and rust-free
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Temperature expansion 0.04 mm/°C — no binding in outdoor scenic lifts
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Designed for 4 million cycles at 3.0 m s⁻¹ — equivalent to 15 years in a 800-start/day building
5. Replacement Cycle & Preventive Maintenance
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High-speed office (>1,000 starts day⁻¹) – inspect every 6 months, replace rollers every 5 years
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Residential tower (300–600 starts day⁻¹) – inspect annually, replace every 8 years
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Low-rise freight (≤200 starts day⁻¹) – inspect every 18 months, replace every 10 years
Replace immediately if:
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Diameter worn below 123 mm (1.6 % reduction)
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Radial play >0.3 mm when 50 N side-load is applied
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Cracks in PU tread >2 mm deep or surface flaking >10 mm²
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Bearing emits >75 dB(A) at 1 m or temperature >65 °C
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Rail scoring visible (>0.1 mm depth) under roller track
6. Extending Life – 3 Pro Tips
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Keep rail straightness ≤0.5 mm / 5 m; kinked rails eat rollers
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Wipe rail monthly; brake-dust paste acts like grinding paste
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Align car and counter-weight rollers on the same rail axis; misalignment doubles roller wear
7. Why Buy 125×22×6303 from Nanjing Zhuye Elevator Parts?
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Factory-new PU 94 Shore-A, not recycled plastic; passes 4-million-cycle wear test
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Steel hub zinc-plated; salt-spray 48 h — no rust in coastal shafts
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Dual stock: 6,000 pcs Nanjing, 2,000 pcs Dubai — next-day to 65 countries
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Bundle kit: roller + circlips + M12 bolt + 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 125×22×6303 guide-shoe roller is the unsung hero that carries tonnes of lateral load every day yet never asks for attention—until it cracks. Stock a handful from Nanjing Zhuye on every service truck, swap them on schedule, and replace “car shake” complaints with a five-minute planned fix — one silent, smooth ride at a time.
