Semi-Automatic Bollard

Product Introduction

Semi-automatic rising bollard is a widely used vehicle access control security bollard. Powered by built-in gas spring, it rises automatically after unlocking with a special key; users press down manually to lower and lock the bollard.

No hydraulic pump, no power wiring required. Easy installation, low maintenance, ideal for locations without power supply or sites requiring intermittent traffic management.

Core Advantages

No power supply needed: Fully mechanical structure, works normally in power outage, suitable for remote areas.
Simple operation: Unlock by key → auto rise; press down manually → auto lock after lowering.
Heavy-duty 304 stainless steel body: 6mm thick cylinder, anti-rust, long service life for outdoor all-weather use.
High impact resistance: Block unauthorized vehicle intrusion, prevent forced breaking.
Low maintenance cost: No hydraulic oil leakage risk, fewer wearing parts.
Customizable height: Standard lifting height 600mm, customized sizes available on request.

Product Specifications | Semi-Automatic Bollard

Bollard diameter: 219mm (Optional 168mm, 273mm)
Bollard wall thickness: 6mm (Optional 8mm,10mm,12mm)
Control mechanism: automatic raising, manual lowering
Bollard body material: 304 stainless steel (surface polished/brushed)
Embedded cylinder: carbon steel (pickling & baking paint)
Working temperature: -35°C ~ 75°C
Protection level: IP68, suitable for all outdoor environments
Accessories: 1 set of special anti-theft key
Reflective marking: Red/yellow/blue reflective film, LED light optional
Load capacity: Resist impact from 30-ton container trucks
Embedded depth: 800mm; Rising height: 600mm (Customizable)

Item	Specification
Model	Semi-Automatic Bollard
Rising Height	600mm (Customizable)
Embedded Depth	800mm
Cylinder Thickness	6mm ±1mm
Reinforced Flange Thickness	6mm
Flange Diameter	360mm
Material	304 Stainless Steel
Surface Finish	Brushed / Polished
Warning Sticker	3M High-visibility Reflective Film
Operating Time	3 – 5 seconds auto rising
Lock Type	Special anti-theft key lock

Semi-Automatic Bollard Sructure And Function

Warning Reflective Band

High-visibility reflective marking surrounds the cylinder. It delivers obvious warning signals at night to remind vehicles and pedestrians, improving access road safety.

304 Stainless Steel Cylinder

The main cylinder adopts 304 stainless steel material. It features rust resistance, corrosion resistance and long service life under all outdoor weather conditions.

Thickened Base Flange

Thickened stainless steel sliding flange base enhances structural stability. Great impact resistance to block illegal vehicle intrusion effectively.

Gas Spring Mechanical Driving System

Built-in gas spring structure, power-free design. Unlock by special key for automatic rising; manually push down to lock after re-unlocking. No wiring construction required.

Semi-Automatic Anti-Collision Bollard Brief Working Principle

After unlocking by the dedicated anti-theft key, the internal gas spring pushes the semi-automatic bollard upward automatically, and it gets locked at the maximum rising height. To lower it, turn the key again to unlock the mechanism, apply downward pressure manually on the bollard. The bollard will self-lock when completely retracted to be flush with the road surface.

Semi-automatic Bollard System: Solving Your Core Business Pain Points

Semi-automatic bollards adopt pure mechanical gas-spring drive, requiring no power supply and wiring construction. It perfectly addresses the common challenges faced by property management, industrial parks, schools and commercial plazas.

Pain Point 1: No power supply available on site
Fully mechanical structure, independent operation without electricity. Ideal for remote zones, temporary access points and locations where cable laying is difficult or costly.
Pain Point 2: High failure rate & expensive maintenance for hydraulic bollards
No hydraulic pump, no hydraulic oil leakage risk. Fewer vulnerable parts, simple structure to cut long-term maintenance expenditure.
Pain Point 3: Emergency traffic control under power outages
Works normally during blackouts. Unlock with dedicated key for automatic rising, ensuring uninterrupted vehicle access management.
Pain Point 4: Budget limitation for large-scale installation
Lower overall procurement and construction cost compared with automatic hydraulic bollards. Suitable for projects with intermittent traffic control demands.
Pain Point 5: Simple operation for on-site staff
Easy operation: unlock by key → auto rise; unlock again + manual push down → auto lock. Staff can master the workflow quickly without professional training.
Pain Point 6: Outdoor anti-collision safety requirement
Heavy-duty 304 stainless steel cylinder delivers strong impact resistance. Effectively block unauthorized vehicle intrusion and protect pedestrian areas.