Extension Bars
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About Extension Bars
Extension bars are indispensable additions to any socket set, allowing tradespeople and DIY enthusiasts to reach fasteners in deep, recessed, or awkward positions where standard ratchet handles simply won't fit. Available in the three standard drive sizes—1/4" drive for precision work, 3/8" drive for general applications, and 1/2" drive for heavy-duty tasks—these precision-engineered tools effectively extend your reach by anywhere from 50mm to 500mm or more. MyToolShed.co.uk stocks a comprehensive range from trusted manufacturers including Draper, Facom, Bahco, and Elora, ensuring reliable performance in demanding trade environments.
Quality extension bars are manufactured from chrome vanadium steel, providing the strength to withstand high torque loads without flexing or snapping. You'll find various configurations including standard chrome-plated extensions for everyday use, wobble extensions with flexible heads for angled access, impact-rated extensions for use with impact wrenches, and VDE insulated extensions for electrical work. Many professionals invest in extension bar sets, which provide multiple lengths in a single package, ensuring you always have the right reach for the job at hand.
Applications
Extension bars are essential tools across numerous trades and industries:
- Motor mechanics and automotive technicians accessing engine bay components, suspension bolts, and exhaust systems
- Mobile mechanics and vehicle recovery specialists working on roadside repairs with limited access
- Plant fitters and agricultural engineers maintaining heavy machinery and farm equipment
- Plumbers and heating engineers working on pipework in confined spaces beneath boilers or behind radiators
- Electricians (using VDE insulated extensions) working on distribution boards and consumer units
- Motorcycle mechanics reaching recessed fasteners on bikes and ATVs
- HVAC engineers installing and servicing air conditioning and ventilation systems
- Plant maintenance engineers servicing industrial equipment and production machinery
- DIY enthusiasts tackling home repairs and maintenance projects
Choosing The Right Extension Bars
Drive Size Compatibility: Ensure your extension bar matches your existing socket set. A 1/4" drive suits smaller fasteners and delicate work, 3/8" drive handles most general mechanical tasks, whilst 1/2" drive is necessary for heavy-duty applications requiring higher torque values.
Length Requirements: Consider the typical depth of access you need. Common lengths at MyToolShed.co.uk include 50mm, 75mm, 100mm, 150mm, 250mm, and 500mm. Use the shortest extension that reaches comfortably, as longer extensions can introduce flex under high torque.
Material and Construction: Chrome vanadium steel with polished or satin chrome finish offers excellent strength and corrosion resistance. Impact-rated extensions with black oxide finishes are essential for use with air or cordless impact wrenches.
Wobble vs Standard: Wobble extensions provide flexibility when working at angles but may introduce slight play. Standard rigid extensions offer more precise control for high-torque applications.
Special Requirements: VDE insulated extensions rated to 1000V are legally required under HSE guidelines when working on or near live electrical installations up to 240v.
Safety Information
Electrical Work: Only use VDE insulated extension bars when working on or near live electrical components. Standard chrome extensions conduct electricity and pose serious risk of electric shock. Always follow HSE guidelines.
Impact Tool Use: Never use standard chrome extensions with impact wrenches. The sudden rotational forces can cause standard extensions to shatter. Always use impact-rated extensions with black oxide finish for pneumatic or cordless impact tools.
Wear and Inspection: Regularly inspect extension bars for wear, particularly at the drive ends. Worn extensions can slip under load, potentially causing injury or damaging fasteners. Replace any extension showing signs of cracking, bending, or significant wear.
Frequently Asked Questions
Can I use multiple extension bars connected together for extra reach?
Whilst physically possible, this practice isn't recommended. Each additional connection introduces flex and reduces torque accuracy. The assembly becomes increasingly unstable and can separate under load. Invest in a longer single-piece extension bar for better rigidity and control.
Do I need different extension bars for my cordless impact wrench?
Yes, absolutely. Cordless impact wrenches generate sudden rotational impacts that standard chrome extensions can't handle. You must use impact-rated extension bars with black oxide or black phosphate finish, specifically engineered to absorb the hammering action without fracturing.
How do wobble extensions work and when should I use them?
Wobble extensions feature a spring-loaded ball bearing mechanism allowing the socket to articulate at an angle (typically up to 15 degrees) whilst maintaining drive engagement. They're invaluable when fasteners aren't perfectly aligned with your working position, though rigid extensions provide better accuracy for precision torque wrench work.