Description
Otis Eevator Traction Machine Worm Gear YJ245D 60H Brief Introduction
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Product Name |
Otis Eevator Traction Machine Worm Gear |
| Model Number | YJ245D 60H |
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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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Otis Elevator Traction Machine Worm Gear YJ245D 60H – Installation, Lubrication & Replacement Guide
Provided by Nanjing Zhuye Elevator Parts
Provided by Nanjing Zhuye Elevator Parts
Summary
The YJ245D 60H is a heavy-duty worm-gear reduction unit rated 15 kW @ 60 Hz, 1 450 rpm input, 97 rpm output, 1 550 N·m torque. Cast in GG-25 iron and hobbed to AGMA 10, it drives Otis YJ245D traction machines up to 1 000 kg @ 1.6 m/s. Nanjing Zhuye Elevator Parts (NYE) has imported, machined and stocked genuine worm-gear sets since 2012, shipping over 2 100 units to 28 countries. Below we explain how to install, lubricate and—crucially—when to replace this “mechanical heart” before pitting or backlash turns a smooth ride into a noisy, oil-dripping shutdown.
The YJ245D 60H is a heavy-duty worm-gear reduction unit rated 15 kW @ 60 Hz, 1 450 rpm input, 97 rpm output, 1 550 N·m torque. Cast in GG-25 iron and hobbed to AGMA 10, it drives Otis YJ245D traction machines up to 1 000 kg @ 1.6 m/s. Nanjing Zhuye Elevator Parts (NYE) has imported, machined and stocked genuine worm-gear sets since 2012, shipping over 2 100 units to 28 countries. Below we explain how to install, lubricate and—crucially—when to replace this “mechanical heart” before pitting or backlash turns a smooth ride into a noisy, oil-dripping shutdown.
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Part-number breakdown YJ245D 60H = Otis YJ245D frame, 60 Hz, 4-pole, 1 450 rpm input, 97 rpm output, 15 kW, 1 550 N·m rated torque
Worm: 20CrMnTi carburised, HRC 58–62, 5 mm module, 15° lead angle
Wheel: GG-25 cast iron, 60 teeth, AGMA 10 accuracy, 1 550 mm pitch diameter
Ratio: 15:1, efficiency 92 %, noise <55 dB(A) @ 1 m, MTBF 80 kh @ 25 °C -
Safety first—lock-out & verify The gear sits on the 380 VAC motor circuit but contains 110 VDC brake circuits. Lock the main disconnect, hang a lock-out tag and wait 5 min for the DC bus to fall below 5 V. Confirm zero energy with a CAT-III meter before removing any guard.
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Mechanical installation—keep it level Base: 600 × 400 mm, 4 × M20 holes, grade 12.9 bolts, torque 400 N·m.
Maintain ±1 mm level; every 1 mm misalignment introduces 0.05 mm tooth stress. NYE supplies a free laser-level (NY-LASER-YJ245) and anti-vibration pads (NY-AVP-YJ245) to reduce structure-borne noise 3 dB(A). -
Lubrication—keep it wet Oil: synthetic EP 220, 40 °C–90 °C, change every 8 000 h or 2 years.
Level: sight glass centre; every 10 mm below adds 1 °C rise and halves gear life.
Filter: 25 µm, change every oil change. NYE offers pre-filled kits (NY-OIL-220-5L) and magnetic drain plug (NY-PLUG-220). -
Alignment & backlash check Radial run-out: <0.05 mm on worm, <0.1 mm on wheel.
Backlash: 0.10–0.15 mm; every 0.05 mm excess increases noise 2 dB(A).
If backlash >0.25 mm, gear is worn—replace unit immediately. -
Temperature & lifetime model Bearing grease: 40 000 h @ 75 °C, doubles every 10 °C drop.
Worm wheel: 80 000 h @ 25 °C, halves every 10 °C rise.
Translate to elevator duty: Light traffic (residence, 300 trips/day) – gear ≈ 25 years; inspect every 5 years. Medium traffic (office, 600 trips/day) – gear ≈ 12 years; inspect every 3 years. Heavy traffic (mall/metro, 1 200 trips/day) – gear ≈ 6 years; inspect every 2 years. -
Wear limits & replacement triggers Backlash >0.25 mm across 3 teeth.
Pitting >5 % of tooth surface.
Oil temperature >90 °C steady.
Bearing noise >65 dB(A) @ 1 m. -
Rapid swap (downtime < 4 h) a) Place car at mid-floor, lock-out, tag out.
b) Drain oil, remove guard, photograph alignment.
c) Remove 4 bolts, slide old gear out.
d) Insert new NYE YJ245D 60H, torque 400 N·m, set level ±1 mm.
e) Fill oil, align backlash, run 5 cycles, check noise.
f) Log serial number and temperature; return old unit for recycling. -
Recycling & sustainability Nanjing Zhuye offers prepaid DHL labels inside every carton.
Returned gears are stripped: steel worm remelted, cast-iron wheel shot-blasted, copper coil recycled. One recycled 60H saves 35 kg CO₂—equal to the elevator’s standby consumption for 2 months.
By treating the YJ245D 60H as the mechanical heart of the elevator—not just another “gear”—you eliminate oil leaks, reduce noise-callouts and keep passengers moving smoothly.
Specify Nanjing Zhuye genuine stock, follow the oil-life table above, and the only thing your machine will ever whisper is quiet, reliable torque—revolution after revolution, decade after decade.
Specify Nanjing Zhuye genuine stock, follow the oil-life table above, and the only thing your machine will ever whisper is quiet, reliable torque—revolution after revolution, decade after decade.
