Locking Collar Body: Outer Diameter Tolerance g6

Component Specifications

Definition

The locking collar body is a critical mechanical component designed to maintain precise axial positioning of bearings, gears, or other rotating elements on shafts. It functions as a rigid interface that prevents axial movement through mechanical interference or clamping force, ensuring stable torque transmission and alignment in industrial machinery. Typically installed between rotating components and shaft shoulders, it features precision-machined surfaces for optimal contact and load distribution.

Working Principle

The locking collar body operates on the principle of mechanical interference and frictional locking. When properly installed, it creates a rigid connection between the shaft and rotating component through either tapered surfaces that wedge against mating parts, or through clamping mechanisms that exert radial pressure. This prevents relative axial movement while allowing rotational force transmission, maintaining precise component positioning under operational loads and vibrations.

Materials

Typically manufactured from medium-carbon alloy steels (AISI 4140, 4340) or stainless steels (AISI 304, 316) for corrosion resistance. Heat treatment to 28-32 HRC for standard applications, 40-45 HRC for high-load applications. Surface finishes: 0.8-1.6 μm Ra for bearing surfaces, 3.2-6.3 μm Ra for non-critical surfaces.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Parallelism	0.02 mm
Bore Tolerance	H7/h6
Perpendicularity	0.015 mm
Surface Hardness	28-45 HRC
Outer Diameter Tolerance	g6
Torque Transmission Capacity	50-500 Nm (depending on size)
Maximum Operating Temperature	150°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 286-2, DIN 7154, ISO 2768-mK

Parent Products

This component is used in the following industrial products

Locking Device

A mechanical component within an end bearing assembly that secures bearing elements in position to prevent axial movement or rotation.

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Engineering Analysis

Risks & Mitigation

Improper installation leading to axial play
Material fatigue under cyclic loading
Corrosion in harsh environments
Thermal expansion mismatch
Over-torquing during installation

FMEA Triads

Trigger: Insufficient clamping force during installation
Failure: Axial slippage under load
Mitigation: Use calibrated torque wrenches, follow manufacturer's installation torque specifications, verify with dial indicator measurements

Trigger: Material fatigue from cyclic loading
Failure: Crack propagation and catastrophic failure
Mitigation: Regular non-destructive testing (magnetic particle or dye penetrant), implement preventive replacement schedules based on load cycles

Trigger: Corrosive environment exposure
Failure: Reduced clamping force and seizing
Mitigation: Select appropriate corrosion-resistant materials, apply protective coatings, implement regular inspection protocols

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101, dimensional tolerances per ISO 286-2, surface finish per ISO 1302

Test Method

Axial load testing per ISO 10791-7, torque transmission testing, metallurgical analysis per ASTM E45, dimensional verification with CMM

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

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Manufacturers of Locking Collar Body

Manufacturer profiles associated with Locking Collar Body.

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Frequently Asked Questions

What is the primary function of a locking collar body?

The primary function is to provide secure axial positioning of rotating components on shafts while enabling efficient torque transmission, preventing axial movement under operational loads.

How does a locking collar differ from a standard shaft collar?

Locking collars feature precision-machined surfaces and specific mechanical designs (tapered, split, or clamping types) that create more secure axial locking compared to standard set-screw collars, offering higher load capacity and reliability.

What maintenance is required for locking collar bodies?

Regular inspection for wear, proper re-torquing of fasteners during maintenance cycles, and verification of axial play using dial indicators. Lubrication of threads and contact surfaces during installation is recommended.

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.

Locking Collar Body