Product Description
The Allen-Bradley 803-B4W, a robust Bulletin 803 Series rotating cam limit switch, integrates with larger machines to detect rotational motion and trigger functions at specific points in the machine's cycle using cams fixed to its rotating shaft. Designed for heavy-duty, high-cycle applications, it features precision bearings for smooth operation in either clockwise or counterclockwise directions, regardless of mounting orientation, and requires minimal maintenance. Commonly used in industries like punch pressing, assembly, packaging, and steel forming, it offers adjustable timing and dwell, accommodates single or double shafts, features heavy-duty double break or snap action contacts, supports Type 1 or 4/13 enclosures, and handles speeds up to 400 RPM. Available in six standard styles, the 803-B4W can also be customized for specialized needs.
Is Your Device Showing These Signs?
The Allen Bradley 803-B4W limit switch commonly experiences issues such as contact degradation leading to signal failures, mechanical wear affecting operational accuracy, and corrosion impacting housing integrity. Technicians address these problems through contact cleaning or replacement, recalibrating or substituting worn mechanical components like levers and plungers, and applying protective coatings or replacing corroded enclosures. Wiring issues, including loose connections and insulation breakdown, are also prevalent and require thorough inspection and repair to ensure proper circuit continuity and prevent short circuits. Actuator arm damage from excessive force or impact necessitates replacement to maintain correct switch actuation and system functionality.
Technical specifications
The Allen-Bradley 803-B4W is a heavy-duty rotating cam limit switch used in large machines to detect rotational motion and trigger functions at specific points in a cycle. It's designed for high-cycle applications, offers adjustable timing and dwell, supports various configurations, and is commonly used in industries like punch pressing and packaging. It's available in standard styles and can be customized.
Our Repair Process for the
803-B4W
Our repair process for the Allen Bradley 803-B4W limit switch begins with a comprehensive inspection to diagnose contact degradation, mechanical wear, corrosion, wiring issues, and actuator arm damage. Contact degradation is resolved through meticulous cleaning or complete replacement of affected contacts. Mechanical wear is addressed by recalibrating or replacing worn components such as levers and plungers. Corrosion impacting housing integrity requires the application of protective coatings or complete enclosure replacement. Wiring issues, including loose connections and insulation breakdown, are corrected through thorough inspection and repair to ensure proper circuit continuity. Finally, actuator arm damage necessitates immediate replacement to maintain correct switch actuation and overall system functionality.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.

Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.

















