How To Maintain The Hinges Of Revolving Doors?

The maintenance of rotary door hinges is very important to ensure the long-term stable operation of the revolving door and prolong its service life. Regular cleaning, lubrication, tightening, rust-proofing can effectively reduce wear and tear, prevent abnormal noise and blockage. Here are detailed maintenance steps and dos and don'ts:
I. Daily Cleaning and dust prevention.
Frequency of cleaning:
High-frequency use (such as revolving doors at shopping malls and hotels): Clean once a week.
Low-frequency use (such as revolving doors at home and office): Clean once a month.
Cleaning methods:
Use a soft brush or dry cloth to remove dust, sand and other impurities from the hinge surface to avoid hard scratches.
If the hinges are greasy or stubborn, wipe them with a a diluted neutral detergent,such as detergent, and then dry with water.
Preventive measures:
Avoid using acidic or alkaline cleaners (such as hydrochloric acid or sodium hydroxide) to prevent corrosion of metal surfaces.
After washing, make sure the hinges are completely dry to prevent residual moisture from rusting.
ii. Regular Lubrication and maintenance
Lubrication Interval:
High frequency use: lubricate every 3 months. Low frequency use: Lubricate every 6 months.
Lubricant Selection:
Purpose: White lithium grease (high temperature, wear resistant, suitable for most metal hinges).
Precision: Silicone-based lubricant (non-corrosive, suitable for plastics or coated hinges).
Avoid: Motor oil or butter (dust attracts and accelerates wear).
Lubrication Procedure:
Step 1: inject lubricant into hinge shaft springs and joints with a fine needle or a special lubricating nozzle.
Step 2: slowly open and close the door several times to distribute the lubricant evenly.
Step 3: Wipe off excess lubricant with a dry cloth to prevent contaminating the door or floor.
Note:
Before lubrication, make sure the hinges are clean and dry to avoid contamination.
If the hinge has damping characteristics (such as nylon damper rod), make sure it is compatible with lubricant to avoid affecting shock absorption. Tightening Screws and inspecting structures
Tightening Cycle:
Check and tighten the hinge screws every six months to prevent the door from sagging or making unusual noises due to loosening.
Method of inspection:
Use a screwdriver or wrench to check each screw on the hinge that connects the door frame to the door body to make sure it is not loose or missing.
If the thread is found to be peeling or damaged, the thread of the same specification shall be replaced.
Structural Inspections:
Check if the hinge is deformed or cracked, and make sure the shaft stays close to the hinge.
If structural damage (such as breakage or serious wear and tear) is detected, the hinge should be replaced immediately to avoid safety hazards.
4. Rust proof (Metal Hinges)
Applicable Applications:
Damp conditions (such as bathrooms and kitchens) or coastal areas need enhanced rust prevention treatment.
Rust prevention methods:
Stainless steel hinges: Wipe regularly with a stainless steel cleaner to maintain the surface smooth.
Cold rolled steel/zinc alloy hinges:
If the electroplating layer is intact, rust oil (e.g., WD-40) should be used to form a protective film. If the coating is damaged, sand away any rust and apply an antirust paint (such as zinc-phosphating primer).
Note:
After rust-proof treatment, let the door dry completely before using. Avoid clothing contaminated with lubricants or rust oil.
Avoid clean plating the electroplating steel wool or bristles to prevent scratchings.
Exceptional maintenance.
Concealed Hinges:
Check the concealed hinge cover regularly to prevent dust from getting into the internal structure.
If the lid is difficult to open, use a vacuum cleaner with a fine nozzle to clean the gap.
Damping hinges:
Avoid slamming doors to avoid damaging the shock absorbers.
If the shock absorber effect decreases, check if shock absorber rod oil leakage or deterioration, if necessary to replace the shock absorber rod.
Heavy-Duty Hinges (such as industrial doors):
Check the bearing lubrication every three months and add high temperature grease (such as lithium base grease).
6. Check the balance of the door regularly to prevent deformation due to excessive weight on one side of the hinge. Long-term maintenance
If the revolving door is not operational for a long period of time (e.g. during renovation):
The hinges are made of rust resistant oil and protected by plastic packaging.
Secure the door to a partially open position to prevent the hinge from buckling under prolonged pressure.
Hinges should be thoroughly cleaned and lubricated before being reopened.
7. Maintenance Records and Replacement Cycles
Establish a maintenance log:
Record the time and material used for each cleaning, lubrication, and tightening to facilitate tracking of hinge status.
Replacement Cycle Reference:
High-frequency use: Replace every 5-8 years.
Low frequency use: Replace every 8-10 years.
If it is badly worn, damaged or frequently clogged, it must be replaced as soon as possible.