Description

Xizi Otis roller guide shoe diameter 76MM Brief introduction

1. What 76 mm Guide Shoe Really Is

• Outer diameter: 76 mm × 24 mm wide tread—fits 16–19 mm rail web
• Material: oil-impregnated PU 92 Shore-A on steel hub—coefficient of friction 0.18, self-lubricating
• Bearing: sealed 6204-2RS, 20 mm bore, grease-filled for -30 °C to +80 °C
• Load rating: 3.9 kN static, 2.0 kN dynamic per roller—suits cars up to 1,600 kg
• Temperature range: -25 °C to +70 °C—outdoor scenic lifts included
• Pack unit: 1 roller + 2 circlips + M12 shoulder bolt + 2 mm Allen key

2. Where It Is Used

• Otis, Mitsubishi, Thyssen, KONE, Schindler passenger elevators 1.0–2.5 m s⁻¹
• Machine-room-less (MRL) or machine-room (MR) installations
• New build or modernisation—one size fits T45/A, T50/A and T70/B rails
• Suitable for machine-room-less (MRL) cars and counter-weights up to 1,600 kg

3. Installation – 10-Minute Swap

1. Remove old shoe – undo M12 shoulder bolt; slide worn roller off eccentric pin.
2. Inspect pin – if scoring >0.2 mm, polish with 600-grit emery or replace pin.
3. Hand-press new 76 mm roller until circlip seats flush; ensure 0.05–0.10 mm preload on rail.
4. Apply 1 drop of PTFE spray—no grease bath needed; PU is self-lubricating.
5. Tighten bolt – torque 55 N·m; spin by hand—smooth rotation, no lateral play.
6. Run car on inspection – listen for rattling; adjust eccentric until pull force <5 N.

4. Daily Operation – What the Shoe Actually Does

• Carries lateral forces from passenger imbalance, wind or earthquake sensors
• Absorbs rail irregularities; reduces car vibration by 8 dB compared with sliding guides
• Oil-impregnated PU releases micro-film, keeping rail polished and rust-free
• Temperature expansion 0.04 mm/°C—no binding in outdoor scenic lifts
• Designed for 2 million cycles at 1.5 m s⁻¹—equivalent to 15 years in a 300-start/day building

5. Replacement Cycle & Preventive Maintenance

• High-traffic office (>1,000 starts day⁻¹) – inspect every 6 months, replace shoes every 5 years
• Residential tower (300–600 starts day⁻¹) – inspect annually, replace every 8 years
• Low-rise freight (≤200 starts day⁻¹) – inspect every 18 months, replace every 10 years

• Diameter worn below 74 mm (2 % reduction)
• Radial play >0.3 mm when 50 N side-load is applied
• Cracks in PU tread >2 mm deep or surface flaking >10 mm²
• Bearing emits >75 dB(A) at 1 m or temperature >65 °C
• Rail scoring visible (>0.1 mm depth) under roller track

6. Extending Life – 3 Pro Tips

1. Keep rail straightness ≤0.5 mm / 5 m; kinked rails eat rollers
2. Wipe rail monthly; brake-dust paste acts like grinding paste
3. Align car and counter-weight shoes on the same rail axis; misalignment doubles roller wear

7. Why Buy 76 mm Guide Shoe from Nanjing Zhuye Elevator Parts?

• Factory-new PU 92 Shore-A, not recycled plastic; passes 2-million-cycle wear test
• Steel hub zinc-plated; salt-spray 48 h—no rust in coastal shafts
• Dual stock: 12,000 pcs Nanjing, 4,000 pcs Dubai—next-day to 65 countries
• Bundle kit: roller + circlips + M12 bolt + 2 mm Allen key—5 % cheaper than single OEM piece
• 24 months warranty against cracking or abnormal wear
• 7×24 WhatsApp/WeChat video support; average response 10 minutes

Conclusion