Description
Product Introduction & Engineering Value
Position sensing failures rarely originate from the PLC. More often, they begin with a mechanical switch that no longer returns consistently after years of exposure to oil, vibration, or contamination. The Allen-Bradley 802R-HF is built for these demanding industrial environments.
Designed as a metal, NEMA-sealed rotary lever limit switch, the 802R-HF provides reliable position detection for machine tools, conveyors, lifting equipment, and automated production machinery. Its sealed construction protects the switching mechanism from dust, coolant, and oil while maintaining dependable operation under repeated mechanical cycling.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Model | 802R-HF |
| Product Type | Metal NEMA Sealed Limit Switch |
| Contact Configuration | Normally Open (N.O.) |
| Switching Action | Snap Action |
| Actuator Type | Rotary Lever |
| Return Mechanism | Spring Return |
| Operating Direction | Clockwise and Counterclockwise |
| Enclosure Rating | NEMA Type 4 & Type 13 |
| Housing Material | Metal |
| Continuous Current Rating | 5 A @ 600 VAC |
| AC Make Rating | 7.5 A @ 480 VAC |
| Maximum AC Breaking Capacity | 360 VA @ 600 VAC |
| Operating Temperature | -29°C to +121°C |
| Conduit Entry | 1/2 in. NPT |
| Typical Applications | Machine position sensing, travel limits, interlocks, material handling equipment |
Field Application & The “Trench” Experience
A palletizing line experienced random production stops every few shifts. PLC diagnostics repeatedly indicated that the end-of-travel sensor failed to activate, but electrical testing showed no wiring faults.
Maintenance eventually discovered that the existing limit switch no longer returned completely after years of exposure to lubricant and mechanical shock. Replacing it with an 802R-HF restored consistent switching, eliminating nuisance machine stops without modifying the PLC logic.
Typical application scenarios include:
- Gantry crane end-of-travel detection
- Packaging machine carriage positioning
- Hydraulic press stroke limit monitoring
- Conveyor diverter position confirmation
- 802R-HF
- 802R-HF
Transparency SOP: QA & Testing
Every New Surplus or professionally Refurbished 802R-HF is inspected before shipment.
- Verify the catalog number and product identification.
- Inspect the metal housing for impact damage and corrosion.
- Check actuator movement, spring return, and operating torque.
- Verify contact continuity and insulation resistance.
- Perform repeated actuation testing to confirm reliable snap action.
- Inspect conduit threads and sealing surfaces.
- Package using protective materials to prevent mechanical damage during transport.
The Veteran’s Tech Trap Guide
⚠️ The operating lever is not included. The 802R-HF requires a compatible operating lever to function. Ordering only the switch body without the correct lever is a common procurement mistake.
⚠️ Don’t use this switch as a precision positioning device. Mechanical limit switches are designed for position detection—not high-accuracy measurement. Excessive overtravel can shorten service life.
PRO TIP: If the switch begins operating intermittently, inspect the machine cam or actuator before replacing the switch. Worn cams frequently cause incomplete actuation that appears to be an electrical failure.
PRO TIP: During installation, verify that the actuator travel stays within the manufacturer’s recommended operating range. Excessive force on the rotary shaft can damage the internal mechanism.
Dynamic FAQ
Q1. What is the primary function of the Allen-Bradley 802R-HF?
The 802R-HF is a mechanical rotary lever limit switch used to detect machine position or travel and provide a normally open electrical signal for industrial control systems.
Q2. Is the 802R-HF suitable for wet or oily environments?
Yes. It features a NEMA Type 4 and Type 13 sealed metal enclosure designed to resist water, dust, and oil contamination commonly found in industrial facilities.
Q3. Does the switch include an operating lever?
No. The switch body is supplied without an operating lever. A compatible Allen-Bradley rotary operating lever must be selected separately for the intended application.
Q4. What is the lifecycle status of the 802R-HF?
Rockwell Automation has announced the 802R-HF as an End-of-Life product. Discontinuation is scheduled for December 31, 2028, and no direct Rockwell replacement is currently planned. Existing installations should consider spare parts planning for long-term maintenance.
Q5. How is New Surplus authenticity verified?
Each switch is checked for the correct catalog number, housing integrity, actuator operation, contact performance, and insulation before shipment. Functional cycling is performed to verify reliable switching.
Q6. What warranty is typically available?
Warranty coverage varies by supplier. Most professional industrial automation distributors provide a functional warranty for New Surplus and professionally refurbished 802R-HF limit switches after documented inspection and operational testing.
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