Prevent the door from closing automatically by offsetting gravity/slope and keep the door open Fits standard removable-pin butt hinges 5/8" Radius Hinges） For bathrooms/closets with floor slopes or those requiring ventilation Solve the common door drift problem when the door weighs no more than 25kg and the hinge pin is detachable Four spring tools for self-opening doors (for hollow composite doors, it is recommended to install one on the top hinge) For standard solid wood doors, it is recommended to install two hinges on the top and the middle. Not suitable for heavy metal doors

Self-Adjusting Door Hinge Spring - Installation Guide (Compatible with 5/8" Radius Hinges)

🛠 Tools Required

• Phillips screwdriver
• Needle-nose pliers
• WD-40 lubricant (for rusted pins)
• Hammer + nail (optional)
• Safety gloves

✅ Pre-Installation Checklist

Hinge Compatibility: ✔ ONLY works with standard butt hinges.
Verify: Hinge pin head must protrude ≥5mm above hinge.

Door Weight Limit: ✔ Max 25kg (55 lbs).
Test: Lift door edge - if heavy, use hydraulic arm instead.

🔧 Step-by-Step Installation

⏱ Time: 3-5 minutes per spring

Step 1: Remove Hinge Pin
Spray WD-40 on pin base. Wait 2 minutes.
Insert nail under pin head, tap upward gently with hammer.
Critical: Grip pin head with pliers, rotate counterclockwise while pulling up.

Step 2: Install Spring
Slide spring onto pin until it sits flush with hinge top.
Spring arms must form 90° angle to door surface.
Incorrect: Arms parallel to door → zero tension.

Step 3: Reinsert Pin
Push pin+spring back into hinge hole.
Tap gently with hammer until pin clicks into place.

Step 4: Tension Test
Open door 30°, release - it should hold position.
Adjust Tension:
Too weak: Bend arms outward 15° with pliers (↑ force).
Too strong: Apply silicone grease to hinge joints.

⚙ Spring Quantity Guide

Angle Limit: Max hold angle: 30° (beyond this, spring deforms permanently).
Environmental: Avoid saltwater/moist areas → stainless steel version recommended.

🔧 Maintenance (Extends Life to 3+ Years)

• Monthly: Wipe springs with dry cloth.
• Quarterly: Apply 1 drop 3-in-1 oil to spring coils.
• Biannually: Check pin tightness.

❓ Troubleshooting

• Spring falls off: Arms not angled 90° to door → Reorient.
• No tension: Add 2nd spring or bend arms outward.
• Scraping noise: Trim arm ends with wire cutters.
• Pin stuck: Heat hinge with hair dryer + WD-40.

Warranty: Lifetime replacement if spring breaks (excludes improper installation).

Designed for residential use.