Description

Elevator Door Hanger Roller D50*14*6201 Brief Introduction

Product Name	Elevator Door Hanger Roller
Model Number	D50146201
Quality	Original.Brand New
Payment	T/T. Paypal. Western Union
Delivery	3-5 Working Days
Packaging	Packed by carton

Elevator Door Hanger Roller D50146201: Smooth Operation Core from Nanjing Zhuye Elevatorparts

Elevator Door Hanger Roller D50*14*6201 is a key承重 and guiding component for elevator door systems, with a standard dimension of 50mm (outer diameter) × 14mm (width) × 6201 (bearing model). It is mounted on the door hanger assembly, responsible for supporting the weight of the elevator car door and landing door, and ensuring smooth, quiet, and stable sliding of the door along the guide rail during opening and closing. This door hanger roller is widely compatible with mainstream elevator door systems, making it an indispensable replacement part in residential buildings, commercial complexes, office towers, airports, and industrial elevators. Exclusively supplied by Nanjing Zhuye Elevatorparts, a professional and trusted provider of high-quality elevator components, this Elevator Door Hanger Roller D50*14*6201 fully complies with international elevator safety standards (EN 81-20, GB 7588) and mechanical bearing technical specifications. Crafted with premium bearing steel and precision manufacturing technology, it features excellent load-bearing capacity, wear resistance, and low noise performance, winning recognition from global elevator maintenance teams.

Nanjing Zhuye Elevatorparts adheres to the core philosophy of “Smooth Operation, Durable Bearing” and implements strict quality control throughout the production and inspection process of the D50*14*6201 door hanger roller. Each unit undergoes multi-stage pre-delivery inspections, including load-bearing capacity testing, wear resistance verification, noise level detection, and corrosion resistance trials. The door hanger roller adopts advanced materials and technology: the roller body is made of high-carbon chromium bearing steel (GCr15),经过 quenching and tempering treatment to enhance hardness and wear resistance; the built-in 6201 deep groove ball bearing is filled with high-temperature resistant lubricating grease, ensuring stable rotation even in long-term operation (operating temperature range: -20℃ to 120℃); the surface is treated with anti-rust galvanization or black oxide coating, effectively resisting humidity and dust erosion in elevator shafts; the standardized D50*14*6201 dimension and precise shaft hole design enable seamless matching with elevator door hanger shafts, simplifying installation and replacement processes.

Step-by-Step Usage Guide for Elevator Door Hanger Roller D50146201

To maximize the service life, operation stability, and safety performance of the Elevator Door Hanger Roller D50*14*6201, strictly follow the professional guidelines provided by Nanjing Zhuye Elevatorparts for selection, installation, and maintenance:

1. Professional Selection & Installation

Installation must be conducted by certified elevator technicians proficient in door systems. Prior to installation, refer to the compatibility manual provided by Nanjing Zhuye Elevatorparts to confirm that the D50*14*6201 door hanger roller matches the elevator’s door hanger model, shaft diameter, and door weight (load-bearing capacity of this roller: ≥ 200kg per unit). The installation steps are as follows:

Safety Preparation: Cut off the elevator’s main power supply and lock the power switch to prevent accidental power-on. Place a “Maintenance in Progress” warning sign at the elevator entrance. Fix the elevator car door and landing door in the fully closed position with mechanical supports to avoid accidental movement during installation.
Old Roller Removal: Locate the door hanger assembly on the top of the car door or landing door. Remove the retaining ring or cotter pin that fixes the old roller to the hanger shaft. Use a puller tool to gently remove the old roller from the shaft (do not knock violently to avoid damaging the shaft). Clean the hanger shaft with a sandpaper or degreaser to remove rust, oil stains, and debris.
New Roller Installation: Take the new D50*14*6201 door hanger roller from Nanjing Zhuye Elevatorparts, apply a thin layer of special bearing lubricating grease (recommended by Nanjing Zhuye Elevatorparts) to the hanger shaft. Align the roller’s inner hole with the shaft and push it to the designated position. Reinstall the retaining ring or cotter pin to fix the roller firmly (ensure no looseness). Repeat the operation for all door hanger rollers (usually 2–4 rollers per door).

2. Debugging & Function Test

Debugging and function testing are crucial to ensuring the smooth operation of the D50*14*6201 door hanger roller. Follow these steps with reference to Nanjing Zhuye Elevatorparts’ technical guidelines:

Rotation Test: Manually push the elevator door to open and close repeatedly, observing the rotation of the new roller. Ensure the roller rotates flexibly without jamming, and there is no abnormal friction sound between the roller and the guide rail.
Door Operation Test: Restore the elevator’s power supply and switch to inspection mode. Operate the elevator door to open and close automatically, checking the operation speed and stability. The door should open and close smoothly without jitter, and the noise level should be ≤ 55dB (measured at 1m distance from the door).
Gap Check: Use a feeler gauge to check the gap between the roller and the guide rail (standard gap: 0.5–1mm). Adjust the door hanger position if the gap is too large or too small to avoid uneven stress on the roller.

3. Daily Operation & Routine Maintenance

Regular inspection and maintenance are essential to early fault detection and ensuring the long-term stable operation of the D50*14*6201 door hanger roller. Maintenance personnel should integrate the following checks into their daily patrol routines:

Daily Visual & Auditory Inspection: During elevator patrols, observe the door hanger roller’s operation status. Check if the roller surface is worn, cracked, or deformed; if the retaining ring is intact; and if there is abnormal noise (squeaking, grinding) when the door opens and closes. Record any abnormalities immediately.
Weekly Lubrication & Cleaning: Clean the surface of the roller and guide rail with a soft cloth to remove dust and debris. Apply an appropriate amount of special bearing lubricating grease to the roller’s rotation part (avoid excessive lubrication to prevent dust accumulation). Check the tightness of the retaining ring and re-tighten if necessary.
Monthly Wear & Load Check: Use a caliper to measure the roller’s outer diameter (wear limit: ≤ 1mm; i.e., the outer diameter should not be less than 49mm). Check if the roller’s inner hole is worn (if there is obvious looseness on the shaft). For high-traffic elevators, conduct a load-bearing test to ensure the roller can still bear the door weight stably.

Recommended Replacement Cycle for Elevator Door Hanger Roller D50146201

As a core mechanical component enduring long-term load-bearing, friction, environmental erosion (humidity, dust, temperature changes), and frequent rotation, the D50*14*6201 door hanger roller has a specified service life. Timely replacement is critical to avoiding faults such as roller wear, jamming, or breakage—issues that may lead to elevator door operation failure, jitter, loud noise, or even door clamping accidents endangering passenger safety.

1. Standard Replacement Cycle

Under normal operating conditions (elevator daily operation time 12–24 hours, daily door opening/closing cycles ≥ 2000, environment temperature -20–60℃, humidity 10%–95%), the recommended replacement cycle for the D50*14*6201 elevator door hanger roller is 2–3 years. This cycle is determined based on Nanjing Zhuye Elevatorparts’ long-term field operation data, wear tests, and global user feedback on elevator door systems.

2. Adjustments for Special Scenarios

Harsh Environments & High-Traffic Scenarios: For elevators in high-humidity coastal areas (salt spray corrosion), high-dust industrial sites, or ultra-high-traffic locations (e.g., large airports, central shopping malls) with daily door cycles ≥ 3500, the replacement cycle is shortened to 1–1.5 years. Harsh conditions and frequent use accelerate the wear of the roller surface and the aging of internal bearings.
Low-Frequency Use & Stable Environments: For elevators with low usage frequency (e.g., villa elevators, small office buildings with daily operation time < 8 hours) and stable environments (constant temperature and humidity), the replacement cycle can be extended to 3–4 years—only if Nanjing Zhuye Elevatorparts’ professional technicians conduct an inspection and confirm that the roller’s wear degree, rotation flexibility, and load-bearing capacity meet the original factory standards.

3. Immediate Replacement Conditions

Replace the D50*14*6201 elevator door hanger roller immediately if any of the following issues occur, regardless of its service life:

The roller’s outer diameter wear exceeds 1mm, or the surface is cracked, chipped, or severely deformed, leading to unstable door operation or jitter.
The roller rotates with jamming, or the internal bearing is damaged (manifested as abnormal noise or inability to rotate flexibly), affecting the normal opening and closing of the door.
The roller’s inner hole is severely worn, resulting in obvious looseness on the hanger shaft (axial or radial movement ≥ 2mm).
Professional testing confirms that the roller’s load-bearing capacity is less than 150kg, which cannot meet the safe operation requirements of the elevator door.

In conclusion, the Elevator Door Hanger Roller D50*14*6201 supplied by Nanjing Zhuye Elevatorparts is a high-quality, reliably compatible component tailored for modern elevator door systems. By adhering to the correct usage methods, maintenance schedules, and replacement cycles outlined above, elevator maintenance teams can effectively ensure the smooth, quiet, and safe operation of the elevator door, enhance passenger ride comfort, and minimize downtime. Choosing Nanjing Zhuye Elevatorparts means you not only get 100% authentic D50*14*6201 door hanger rollers but also access to professional technical support—including model matching guidance, on-site installation and debugging advice, and prompt after-sales service. Trust Nanjing Zhuye Elevatorparts for the smooth operation of your elevator door system.

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