Skip to main content
Home / Floor Springs / ZKHG Authentic N-818 Floor Spring for Glass/Framed Doors - Heavy-Duty Wood Door Pivot 160kg Buffer Universal Model

Attributes

Brand -
Category Basic Building Materials / Floor Springs
Origin -
Model Number N-818
Maximum Door Weight 160 kg
Material Heavy-Duty Steel Alloy
Finish Silver Chrome Plated
Applicable Door Type Glass and Framed Wood Doors
Installation Method Floor Embedded / Surface Mount
Closing Speed Adjustable Two-Stage
Opening Angle Up to 90 Degrees
Durability Rating 500,000 Cycles Tested
Warranty Period 2 Years Manufacturer Warranty

6 reviews

A

Anonymous

Mar 27, 2026

Rating: 4/5

Solid build quality

The unit feels very robust and well-made. Installation instructions could be slightly clearer, but once set up, it works perfectly. The adjustable speed is a great feature.

A

Anonymous

Mar 23, 2026

Rating: 4/5

Reliable heavy-duty solution

Does exactly what it says on the tin. Supports our solid wood door without sagging. Took off one star only because the mounting screws provided were a bit short for our specific floor thickness.

A

Anonymous

Mar 20, 2026

Rating: 5/5

Smooth operation

We replaced an old broken spring with this N-818 model. The difference is night and day. The buffer function prevents the door from slamming, which was a major concern for us.

A

Anonymous

Mar 17, 2026

Rating: 5/5

Perfect for heavy office doors

Installed this on our main entrance glass door which weighs about 140kg. It handles the weight effortlessly and the closing action is smooth and quiet. Highly recommended for commercial use.

A

Anonymous

Mar 09, 2026

Rating: 5/5

Professional grade hardware

As a contractor, I have installed many floor springs. This authentic N-818 is top-tier. The finish is durable, and the mechanism is precise. Will definitely order more for future projects.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Great value for money

Compared to other brands, this ZKHG model offers excellent performance at a better price point. It has been running for three months without any issues in a high-traffic area.

5 FAQ

Q: Can I adjust the closing speed myself after installation?

A: Absolutely. There are adjustment valves on the unit that allow you to customize both the main closing speed and the latching speed using a standard screwdriver.

Q: What is the minimum door weight required for this spring to work effectively?

A: While rated for up to 160kg, it performs optimally on doors weighing between 80kg and 160kg. For lighter doors, a smaller model might be more appropriate.

Q: Is this suitable for a double glass door setup?

A: Yes, the N-818 can be used for double doors, but you will need to purchase two units, one for each door leaf, to ensure balanced operation.

Q: Does this come with a template for cutting the floor hole?

A: Yes, the package includes a paper installation template to help you mark the exact dimensions needed for embedding the spring into the floor.

Q: Is the chrome finish resistant to corrosion in humid environments?

A: The chrome plating provides good resistance to rust and corrosion, making it suitable for most indoor environments. However, for coastal areas with high salt exposure, regular maintenance is advised.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
G80 Manganese Steel Lifting Chain Rigging - Hooks, Links, and Rings for Crane Hoisting and Mold Handling

G80 Manganese Steel Lifting Chain Rigging - Hooks, Links, and Rings for Crane Hoisting and Mold Handling

$96.00

K2E200-AH20-05 Rittal Cabinet Cooling Fan, German ebmpapst Fan, 230V 70W

K2E200-AH20-05 Rittal Cabinet Cooling Fan, German ebmpapst Fan, 230V 70W

$2,394.00

Double-Layer Stainless Steel Reactor – Lab Atmospheric/High-Pressure/Negative Pressure Stirred Kettle for Distillation, Hydrogenation, Polymerization, Polyester

Double-Layer Stainless Steel Reactor – Lab Atmospheric/High-Pressure/Negative Pressure Stirred Kettle for Distillation, Hydrogenation, Polymerization, Polyester

$7,500.00

Thickened Felt Calligraphy Mat - Specialized Cloth for Brush Writing, Chinese Painting Practice, and Grid Desk Padding

Thickened Felt Calligraphy Mat - Specialized Cloth for Brush Writing, Chinese Painting Practice, and Grid Desk Padding

$5.61

Dashan Colored Paper Calligraphy Felt Mat Traditional Chinese Painting Practice Mat for Beginners Ancient Style Desk Pad

Dashan Colored Paper Calligraphy Felt Mat Traditional Chinese Painting Practice Mat for Beginners Ancient Style Desk Pad

$15.78

MAIKE Outdoor Waterproof Dry Bag - Foldable Bucket Pack for Diving, Snorkeling, Swimming, Rafting, and Surfing

MAIKE Outdoor Waterproof Dry Bag - Foldable Bucket Pack for Diving, Snorkeling, Swimming, Rafting, and Surfing

$10.90

Cinnabar Liquid Rooster Comb Blood Daoist Bletilla Natural Raw Ore Water-Floated Cinnabar Powder Ink for Calligraphy and Painting

Cinnabar Liquid Rooster Comb Blood Daoist Bletilla Natural Raw Ore Water-Floated Cinnabar Powder Ink for Calligraphy and Painting

$4.53

Goat Hair Flat Wash Brush Background Wash Brush for Fine Line Traditional Chinese Painting Base Color Background Wool Brush Gouache Watercolor Oil Painting Soft Bristle Row Brush

Goat Hair Flat Wash Brush Background Wash Brush for Fine Line Traditional Chinese Painting Base Color Background Wool Brush Gouache Watercolor Oil Painting Soft Bristle Row Brush

$4.25

Pre-sale Litin The Husky and His White Cat Shizun: Past and Present Life Badge & Colored Paper Set (Mo Ran & Chu Wanning)

Pre-sale Litin The Husky and His White Cat Shizun: Past and Present Life Badge & Colored Paper Set (Mo Ran & Chu Wanning)

$24.00

Hot-Selling Street Fair and Temple Fair Toy Source - Wooden Puppet Rattle Drums, Cartoon Wooden Man Shakers

Hot-Selling Street Fair and Temple Fair Toy Source - Wooden Puppet Rattle Drums, Cartoon Wooden Man Shakers

$1.50

Air Source Heat Pump Water Heater for Commercial and Home Heating by AMA Shengneng

Air Source Heat Pump Water Heater for Commercial and Home Heating by AMA Shengneng

$8,400.00

Waterproof Dry Bag for Outdoor Rafting and River Trekking - Wet/Dry Separation Storage for Swimming, Fitness, Beach, and Sand Activities

Waterproof Dry Bag for Outdoor Rafting and River Trekking - Wet/Dry Separation Storage for Swimming, Fitness, Beach, and Sand Activities

$8.42

Maichuang Continuous Peanut Roasting Machine - Electromagnetic Drum Roaster for Soybeans, Large-Scale Production Line Equipment

Maichuang Continuous Peanut Roasting Machine - Electromagnetic Drum Roaster for Soybeans, Large-Scale Production Line Equipment

$2,356.00

Free Shipping: Colorful Cartoon Hand-Crank Drum Puppet Toy for Kids – Perfect for Street Markets and Temple Fairs

Free Shipping: Colorful Cartoon Hand-Crank Drum Puppet Toy for Kids – Perfect for Street Markets and Temple Fairs

$64.00

Flower Doctor Balcony Vegetable Growing Box - Family Vegetable & Strawberry Planter, Rooftop Rectangular Plastic Flower Pot

Flower Doctor Balcony Vegetable Growing Box - Family Vegetable & Strawberry Planter, Rooftop Rectangular Plastic Flower Pot

$38.09

Miracle-Gro Organic Potting Soil for Balcony Gardens, Vegetables, Green Plants, Flowers, and General Home Gardening, 40L

Miracle-Gro Organic Potting Soil for Balcony Gardens, Vegetables, Green Plants, Flowers, and General Home Gardening, 40L

$195.98

Silicone Drainage Mat for Faucet Side - Splash-Proof Pad for Kitchen Sinks and Bathroom Countertops

Silicone Drainage Mat for Faucet Side - Splash-Proof Pad for Kitchen Sinks and Bathroom Countertops

$3.57

Complete Dairy Processing Equipment: Yogurt Sterilization Fermentation Tank and Raw Milk Cooling Tank for Farms

Complete Dairy Processing Equipment: Yogurt Sterilization Fermentation Tank and Raw Milk Cooling Tank for Farms

$17,836.00

50x80mm Biggest Size Professional Rectangular Photosensitive

50x80mm Biggest Size Professional Rectangular Photosensitive

$75.62

Rose poem "Fox" Fabric Fragrance Spray

Rose poem "Fox" Fabric Fragrance Spray

$3.15

Nangong Wenfang Healing Beautiful Words Calligraphy Copybook Small Regular Script Brush Tracing Transparent Cards for Women's Practice Entry-Level Elegant Fonts

Nangong Wenfang Healing Beautiful Words Calligraphy Copybook Small Regular Script Brush Tracing Transparent Cards for Women's Practice Entry-Level Elegant Fonts

$49.00

2025 New Cute Puppy Large Capacity Portable Travel Toiletry Bag, Handheld Makeup Organizer

2025 New Cute Puppy Large Capacity Portable Travel Toiletry Bag, Handheld Makeup Organizer

$9.59

Cylindrical Granule Making Equipment Rotary Granulator for Rice Flour and Tartary Buckwheat Tea

Cylindrical Granule Making Equipment Rotary Granulator for Rice Flour and Tartary Buckwheat Tea

$400.00

Face Painting Sponge Kit - Teardrop and Half-Round Magic Sponges for Base, Gradient, and Quick Designs

Face Painting Sponge Kit - Teardrop and Half-Round Magic Sponges for Base, Gradient, and Quick Designs

$2.11

Nutrient Soil and Submerged Hydroponic Clay Pebbles - Backfill for Bathrooms, Planters, and Soil-Free Green Plants

Nutrient Soil and Submerged Hydroponic Clay Pebbles - Backfill for Bathrooms, Planters, and Soil-Free Green Plants

$18.40

Wenmo 100% Cotton Watercolor Paper 2026 Wall Calendar/Monthly Planner 300g DIY Calendar Sheet Sketch Marker Compatible

Wenmo 100% Cotton Watercolor Paper 2026 Wall Calendar/Monthly Planner 300g DIY Calendar Sheet Sketch Marker Compatible

$17.70

Self-Priming Soybean Meal Corn Crusher Vertical Feed Mixer 1-Ton Feed Crushing & Mixing Integrated Machine

Self-Priming Soybean Meal Corn Crusher Vertical Feed Mixer 1-Ton Feed Crushing & Mixing Integrated Machine

$6,650.00

Invisible Retainer Storage Case - Compact, Portable, Leak-Proof Soaking Box for Orthodontic Aligners

Invisible Retainer Storage Case - Compact, Portable, Leak-Proof Soaking Box for Orthodontic Aligners

$18.10

Outdoor Travel Storage Shockproof Deep Waterproof Case with Cushioning for Mobile Electronics Emergency Parts EDC Tool Kit

Outdoor Travel Storage Shockproof Deep Waterproof Case with Cushioning for Mobile Electronics Emergency Parts EDC Tool Kit

$16.00

Guangxi Soilless Cultivation Ceramsite Substrate for Orchids and Green Plants - Lightweight Stone 5-30mm, Multiple Sizes Available for Hydroponics

Guangxi Soilless Cultivation Ceramsite Substrate for Orchids and Green Plants - Lightweight Stone 5-30mm, Multiple Sizes Available for Hydroponics

$7.70