Stop Block / Collar: Load Capacity Up to 5000 N

Component Specifications

Definition

A stop block or collar is a precision-engineered component installed on linear or rotary motion systems to physically restrict the travel distance of moving parts. It serves as a positive mechanical stop that prevents components from exceeding their designed operational limits, thereby protecting equipment from damage caused by over-travel, reducing wear on critical components, and enhancing operator safety by preventing hazardous machine movements beyond safe boundaries.

Working Principle

The stop block/collar operates on the principle of mechanical interference. When installed at predetermined positions along a shaft, rail, or guide, it creates a physical barrier that prevents further movement when contacted by the moving component. This creates a hard stop that absorbs kinetic energy through controlled deformation or force distribution, effectively limiting the stroke to within safe operational parameters.

Materials

Typically manufactured from hardened steel (AISI 4140, 1045), stainless steel (304, 316), aluminum alloys (6061-T6), or engineered plastics (UHMW-PE, Delrin) depending on application requirements for strength, wear resistance, and corrosion protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Width/Height	5-50 mm
Load Capacity	Up to 5000 N
Bore Tolerance	H7/h6
Diameter Range	10-200 mm
Surface Hardness	45-60 HRC (steel variants)
Operating Temperature	-40°C to 200°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 2768, DIN 6885, ISO 286-2

Parent Products

This component is used in the following industrial products

Stroke Limiter

A mechanical component that restricts the maximum travel distance of a moving part within a stroke length adjustment mechanism.

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Engineering Analysis

Risks & Mitigation

Impact damage from improper installation
Wear and deformation over time
Incorrect positioning leading to inadequate stroke limitation
Material fatigue under cyclic loading
Corrosion in harsh environments

FMEA Triads

Trigger: Improper torque application on fasteners
Failure: Stop block shifts position during operation
Mitigation: Use calibrated torque tools and thread-locking compounds

Trigger: Excessive impact forces
Failure: Material deformation or fracture
Mitigation: Install energy-absorbing bumpers and implement controlled deceleration

Trigger: Corrosive environment
Failure: Reduced structural integrity and binding
Mitigation: Select corrosion-resistant materials and apply protective coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Positional tolerance ±0.1 mm, dimensional tolerance IT7 grade

Test Method

Dimensional verification with micrometers, functional testing through controlled stroke cycles, impact resistance testing per ISO 13849

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.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Stop Block / Collar

Manufacturer profiles associated with Stop Block / Collar.

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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 difference between a stop block and a stop collar?

Stop blocks are typically rectangular or square components used on linear guides and rails, while stop collars are cylindrical components designed for shafts and rotary applications. Both serve the same fundamental purpose of limiting movement.

How do you properly install a stop block/collar?

Installation requires precise positioning along the travel path using measurement tools, secure fastening with appropriate hardware (set screws, clamping mechanisms), and verification through test cycles to ensure the stop engages at the correct position without causing impact damage.

Can stop blocks be adjusted after installation?

Yes, many designs feature adjustable positions through slotted mounting holes or repositionable clamping mechanisms, allowing for fine-tuning of stroke limits without complete disassembly.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Stop Block / Collar