Locking Bolt / Latch: Stroke Length 5-50 mm

Q: What is the primary function of a locking bolt in interlock systems?

To physically prevent access to hazardous machine areas during operation by securing guards or doors, ensuring safety compliance and preventing accidents.

Q: How do locking bolts integrate with machine control systems?

They connect to safety relays or PLCs through position sensors, providing feedback that prevents machine startup unless properly engaged and allows controlled release during safe conditions.

Q: What materials are best for corrosive environments?

Stainless steel (316 grade) with appropriate surface treatments provides optimal corrosion resistance in harsh industrial environments.

Component Specifications

Definition

A precision-engineered mechanical component designed to physically lock machine guards, doors, or access panels in closed positions as part of safety interlock systems. It prevents unauthorized or accidental opening during machine operation cycles, ensuring operator safety by maintaining isolation from moving parts, electrical hazards, or process areas.

Working Principle

Operates through mechanical engagement where a bolt or latch extends into a receiver or strike plate when activated, creating a positive lock. Typically integrated with electrical or pneumatic systems that monitor lock status, preventing machine startup unless fully engaged and allowing release only when safe conditions are met.

Materials

High-strength alloy steel (AISI 4140/4340), stainless steel (316/304), or engineered polymers (PEEK, reinforced nylon) depending on application requirements. Surface treatments include zinc plating, black oxide coating, or passivation for corrosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP65/IP67
Locking Force	200-5000 N
Response Time	<100 ms
Stroke Length	5-50 mm
Actuation Type	Solenoid, pneumatic, mechanical
Electrical Rating	24V DC, 5A max
Operating Temperature	-20°C to +120°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 14119, ISO 13849-1, DIN EN 1088, ANSI B11.19

Parent Products

This component is used in the following industrial products

Interlock Mechanism

A safety and control device that prevents simultaneous operation of incompatible functions in a Rapid Transfer Port (RTP).

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Engineering Analysis

Risks & Mitigation

Mechanical failure leading to unintended access
Corrosion compromising locking function
Electrical failure preventing proper engagement
Installation errors reducing effectiveness

FMEA Triads

Trigger: Wear or fatigue in locking mechanism
Failure: Bolt fails to extend fully or retract properly
Mitigation: Regular maintenance inspections, use of wear-resistant materials, and redundant position sensors

Trigger: Environmental contamination
Failure: Corrosion or debris accumulation prevents smooth operation
Mitigation: Proper sealing (IP65+), regular cleaning protocols, and corrosion-resistant materials

Trigger: Electrical system fault
Failure: Solenoid or sensor failure prevents proper locking/unlocking
Mitigation: Dual-channel safety circuits, regular electrical testing, and fail-safe design

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm for critical engagement dimensions, position repeatability within 0.5 mm

Test Method

Functional testing per ISO 14119 including cycle testing (minimum 1 million cycles), force measurement, environmental testing, and electrical safety verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Locking Bolt / Latch

Manufacturer profiles associated with Locking Bolt / Latch.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a locking bolt in interlock systems?