Cr-Mo Impact Extension Bars
When working in deep, recessed, or hard-to-reach areas, transferring high torque safely and efficiently is a major challenge. Our Industrial-Grade Cr-Mo Pneumatic Impact Extension Bars are engineered to bridge that gap.
Specifically designed for use with pneumatic impact wrenches and high-torque air tools, our extension bars are crafted from premium Chromium-Molybdenum (Cr-Mo) steel and processed using advanced Cold Heading technology. This cold-forming process preserves the continuous grain flow of the metal, significantly improving density, toughness, and fatigue resistance.
These extension bars easily withstand the intense, repetitive shock loads delivered by power impact tools, preventing twisting, cracking, or breaking under high torque.
Whether you are performing automotive chassis service, engine bay assembly, or industrial machinery maintenance, our impact extension bars provide a stable and secure extension of power.
Product Highlights
- Premium Cr-Mo Steel: Offers far greater impact resistance and fatigue life than standard Cr-V steel, making it the industry standard for pneumatic applications.
- Cold Heading Process: Increases structural integrity, tensile strength, and impact durability, allowing the tool to absorb heavy vibrations.
- Maximum Torque Transmission: Precision-machined drive ends minimize play and ensure maximum power transfer from the wrench to the socket.
- Secure Lock Design: Features standard ball detent holes and pin retaining grooves on drive ends to securely lock sockets in place during high-speed rotation.
- Versatile Specifications: Available in 10mm (3/8″) and 12.5mm (1/2″) drive sizes with lengths up to 250mm to handle various working depths.
Product Specifications
| Part No. | Drive Size | Length | Box Qty | Carton Qty | Unit Weight | G.W. |
|---|---|---|---|---|---|---|
| W54080 | 10mm (3/8″) | 75mm | 12 pcs | 240 pcs | 0.076 kg | 19.0 kg |
| W54081 | 10mm (3/8″) | 150mm | 12 pcs | 120 pcs | 0.150 kg | 18.5 kg |
| W54083 | 12.5mm (1/2″) | 125mm | 6 pcs | 48 pcs | 0.217 kg | 11.0 kg |
| W54085 | 12.5mm (1/2″) | 250mm | 6 pcs | 48 pcs | 0.430 kg | 21.0 kg |
Why Choose Us?
- Authentic Cr-Mo Steel Guarantee: We never compromise on raw materials. All impact extension bars are forged from genuine Cr-Mo steel to ensure they do not shatter under heavy industrial loads.
- Precision Manufacturing: Cold heading combined with advanced CNC machining ensures that every male and female drive end strictly complies with DIN/ANSI international standards.
- Rigorous Quality Testing: Every batch undergoes destructive limit-torque tests to ensure consistent hardness and elasticity, keeping your customer complaints to zero.
- Export-Standard Packing: Packaged in sturdy inner boxes and moisture-resistant master cartons to guarantee rust-free and undamaged delivery over long ocean or air transit.
- Flexible OEM/ODM Support: We offer custom laser branding, chemical surface treatments (such as phosphate black or electrophoresis black), and custom retail packaging designs.
FAQ
Q1: Why should I choose Cr-Mo instead of Cr-V for impact extension bars?
Chrome Vanadium (Cr-V) is hard but relatively brittle, which is fine for hand tools. However, Chrome Molybdenum (Cr-Mo) offers superior toughness and shock absorption. It won’t shatter under the high-frequency vibrations and massive shock loads of pneumatic impact guns, making it much safer.
Q2: What is the benefit of the “Cold Heading” process?
Cold heading is a manufacturing process where metal is shaped under high pressure at room temperature. This keeps the internal steel grain structure continuous and unbroken, dramatically increasing the tensile, torsional, and bending strength of the extension bar.
Q3: Do these extension bars have locking mechanism features?
Yes. Our 10mm (3/8″) and 12.5mm (1/2″) extension bars feature standard spring-loaded detent ball holes and safety pin holes to securely lock onto your impact wrench and impact sockets, preventing dangerous socket drop-offs during high-speed rotation.
Q4: What is the MOQ (Minimum Order Quantity) and lead time?
We keep stable inventory for standard sizes. For customized OEM logos or custom packaging, the MOQ depends on the specific requirements, and the lead time is typically 25 to 35 days. Please reach out to our sales team for detailed terms.
