Description
The ATA / B&D Steel Chain C-Rail Extension Kit – Part No. 86890 is a genuine rail extension designed specifically for the ATA / B&D Steel C-Rail & Chain system.
The extension adds 790mm of additional rail length, allowing the standard steel chain C-rail to be extended for use on sectional garage doors up to approximately 3230mm high.
It is ideal for taller sectional garage door installations where the standard steel chain rail does not provide sufficient travel, allowing a compatible ATA or B&D garage door opener to be installed without requiring a completely different rail system.
📏 790mm Additional Rail Length
The 86890 extension kit adds 790mm to the compatible ATA / B&D Steel Chain C-Rail.
The additional length provides the trolley with the increased travel required to fully open and close taller sectional garage doors.
It is particularly useful for:
- Taller residential garage doors
- Custom sectional garage doors
- High garage openings
- New garage door installations
- Replacement opener installations
- Compatible ATA operators
- Compatible B&D operators
🚪 Suitable for Doors Up to 3230mm High
When installed with the compatible ATA / B&D Steel Chain C-Rail, the 86890 extension kit allows the rail system to accommodate sectional garage doors up to approximately 3230mm high.
This makes it an ideal solution for garage doors exceeding the capacity of the standard rail.
⚙️ Specifically for Steel Chain C-Rails
The 86890 has been specifically designed for the ATA / B&D Steel C-Rail & Chain system.
The extension increases the effective length of both the physical rail and chain drive arrangement, providing the additional trolley travel required for a taller door.
It should not be confused with extension kits designed for:
- Steel Belt C-Rails
- Aluminium Chain C-Rails
- Aluminium Belt C-Rails
- Jamb-Type Tilt Door Rails
The existing rail type should always be confirmed before ordering.
⛓️ Extends the Chain Drive System
The extension kit is designed to maintain the chain-driven operation of the original C-rail.
Once installed, the extended rail continues to provide the same positive mechanical connection between the garage door opener and trolley while providing additional travel for the taller door.
The system provides:
- Strong mechanical power transfer
- Extended trolley travel
- Durable chain drive operation
- Reliable opening and closing
- Purpose-designed integration with the existing rail
🏗️ Ideal for Taller Sectional Garage Doors
Taller garage doors are increasingly common in modern homes, particularly where additional clearance is required for larger vehicles.
The 86890 allows compatible ATA and B&D chain-driven sectional door openers to be configured for these taller applications.
Typical applications include:
- Custom sectional garage doors
- Architectural homes
- High-clearance garages
- Taller residential garage doors
- Garages accommodating larger vehicles
- Replacement automation on existing tall doors
🔧 Suitable for New Installations
The 86890 can be installed when fitting a new compatible ATA or B&D garage door opener.
Where the garage door exceeds the height capacity of the standard steel chain rail, the extension kit provides the additional rail and chain length required.
This allows the opener rail to be configured according to the actual garage door height.
🔄 Suitable for Existing Installations
The extension kit can also be used with compatible existing installations where additional rail length is required.
This may include:
- Replacing an existing damaged extension
- Installing a replacement steel chain C-rail
- Replacing a garage door opener on a taller door
- Modifying an existing compatible installation
- Upgrading an existing garage door automation system
The existing rail and powerhead should be checked to ensure compatibility before ordering.
🆚 Steel Chain vs Steel Belt Extension
ATA / B&D offer separate extension kits for their steel chain and steel belt rail systems.
The 86890 is specifically for the Steel Chain C-Rail.
The corresponding extension for the Steel Belt C-Rail is a different product.
Because the drive systems are different, the chain and belt extension kits should not be considered interchangeable.
Before ordering, confirm whether your existing rail uses:
- Chain Drive – requires the Steel Chain Extension Kit
- Belt Drive – requires the Steel Belt Extension Kit
⚖️ Correct Garage Door Balance is Essential
Extending the rail does not increase the lifting capacity of the garage door opener.
The garage door must still remain within the size and weight specifications of the particular powerhead being used.
Before installation, the sectional garage door should:
- Be correctly spring balanced
- Move smoothly by hand
- Have correctly aligned tracks
- Have freely rotating rollers
- Not bind during operation
- Remain mechanically stable
- Be suitable for automatic operation
An incorrectly balanced garage door can place excessive load on the chain, trolley, rail, gearbox and garage door opener.
🔩 Correct Chain Tension
Correct chain tension is particularly important when installing a rail extension.
Once the additional rail and chain components have been installed, the complete chain drive must be correctly tensioned.
A chain that is too loose may create excessive movement and noise, while excessive tension can place unnecessary load on the drive sprocket, bearings and powerhead.
The completed rail should therefore be correctly assembled and adjusted before the opener is commissioned.
🧰 Genuine ATA / B&D Accessory
The 86890 is a genuine Automatic Technology rail extension designed for compatible ATA and B&D steel chain C-rail systems.
The extension is identified as:
- Product: Steel Chain C-Rail Extension Kit
- ATA / B&D Part No.: 86890
- Extension Length: 790mm
- Maximum Door Height: Approximately 3230mm
- Rail Type: Steel C-Rail
- Drive Type: Chain
Using the correct extension ensures the additional rail and drive components are designed to integrate with the original chain C-rail system.
📦 What’s Included
The kit includes the components required to extend the compatible ATA / B&D Steel Chain C-Rail.
The extension kit includes the required:
- 790mm Steel C-Rail Extension
- Chain Extension Components
- Associated Extension Hardware
The main C-rail and garage door opener powerhead are not included unless specifically stated otherwise.
Key Features
- Genuine ATA / B&D extension kit
- Part No. 86890
- Specifically designed for Steel Chain C-Rails
- 790mm additional rail length
- Extends the chain drive system
- Suitable for sectional garage doors up to approximately 3230mm high
- Strong chain-driven operation
- Provides additional trolley travel
- Suitable for compatible ATA garage door operators
- Suitable for compatible B&D garage door operators
- Ideal for taller residential garage doors
- Suitable for new installations
- Suitable for compatible existing installations
- Genuine Automatic Technology component
Specifications
- Manufacturer: Automatic Technology Australia
- Brands: ATA / B&D
- Product: Steel Chain C-Rail Extension Kit
- Part Number: 86890
- Extension Length: 790mm
- Maximum Door Height: Approximately 3230mm
- Rail Type: Steel C-Rail
- Drive Type: Chain
- Application: Sectional Garage Doors
- Product Type: Rail Extension Kit
- Genuine Accessory: Yes
Compatibility
The ATA / B&D Extension Kit – Part No. 86890 is designed specifically for compatible ATA / B&D Steel C-Rail & Chain systems.
It is intended for sectional garage door applications where the standard steel chain rail requires additional length.
Operator compatibility will depend on whether the particular ATA or B&D powerhead is designed for use with the steel chain C-rail system.
⚠️ Please Note
The 86890 is specifically the Steel Chain C-Rail Extension Kit.
It should not be confused with the 86891 Steel Belt C-Rail Extension Kit.
The extension adds 790mm of additional rail length and allows the compatible steel chain C-rail system to accommodate sectional garage doors up to approximately 3230mm high.
The extension does not increase the maximum door weight, area or lifting capacity of the garage door opener. The selected powerhead must still be suitable for the size and weight of the garage door.
Please confirm the existing rail type, garage door opener model and garage door height before ordering.
