Description

1. Part-number breakdown TAA416BW1 = Otis TAA416 brake pad set, 2 pads + 4 springs, 160 × 45 × 12 mm, semi-metallic, 1 200 N rated, –25 °C…+120 °C
   Material: copper fibre 35 %, resin 12 %, graphite 8 %, friction modifier balance
   Noise: <55 dB(A) @ 1 m, wear rate <0.05 mm per 1 000 h @ 1 200 N
   Static μ: 0.42, dynamic μ: 0.38, MTBF 8 kh @ 25 °C
2. Safety first—lock-out & verify Brake releases at 110 VDC but pads remain under spring pressure. Lock the main disconnect, hang a lock-out tag and wait 5 min for the spring to relax. Confirm zero energy with a CAT-III meter before removing any guard.
3. Mechanical removal—keep it clean Remove guard (4 × M6 screws), slide old pads out, collect all spring clips.
   Clean rotor face with lint-free cloth + isopropyl alcohol; oil film reduces μ by 15 %.
   If rotor scoring >0.1 mm deep, machine or replace rotor—NYE supplies matched rotor (NY-ROTOR-TAA416).
4. Installation—keep it centred Mount new NYE TAA416BW1 pads using 4 × M8 bolts, torque 20 N·m.
   Maintain 0.2 mm parallel gap; every 0.05 mm misalignment increases noise 2 dB(A).
   Springs: blue-coded, 1 200 N preload, torque 15 N·m; if rusty, replace set (NY-SPRING-TAA416).
5. Bedding-in—keep it hot Run 10 cycles @ 0.3 m/s with 50 % load, then 5 cycles @ rated load.
   Surface temp must reach 80 °C; every 10 °C below reduces bedding efficiency 10 %.
   If glazing appears (mirror finish), re-bed immediately.
6. Air-gap & force check Static gap: 0.20–0.25 mm; every 0.05 mm excess increases release current 10 %.
   Release current: 0.9 A @ 110 VDC; every 0.1 A above indicates spring fatigue.
   If current >1.2 A, replace springs immediately.
7. Wear limits & replacement triggers Pad thickness <10 mm (new = 12 mm).
   Uneven wear >0.5 mm across pad.
   Glazing or oil contamination >5 % surface.
   Noise >60 dB(A) @ 1 m during stop.
8. Replacement cycle model Light traffic (residence, 300 trips/day) – 8 kh ≈ 27 years; inspect every 5 years. Medium traffic (office, 600 trips/day) – 8 kh ≈ 13 years; inspect every 3 years. Heavy traffic (mall/metro, 1 200 trips/day) – 8 kh ≈ 7 years; inspect every 2 years.
9. Rapid swap (downtime < 30 min) a) Place car at mid-floor, lock-out, tag out.
   b) Release brake, remove guard, photograph alignment.
   c) Remove 4 bolts, slide old pads out, clean rotor.
   d) Insert new NYE TAA416BW1, torque 20 N·m, torque springs 15 N·m.
   e) Bed-in 10 cycles, check gap 0.2 mm, check current 0.9 A.
   f) Log thickness and current; return old pads for recycling.
10. Recycling & sustainability Nanjing Zhuye offers prepaid UPS labels inside every carton.
    Returned pads are stripped: copper fibre remelted, graphite reused for lubricants, steel backing shot-blasted for re-coating. One recycled set saves 0.8 kg CO₂—equal to the elevator’s standby consumption for a week.