Retaining Plates: Thickness 3-12 mm, Flatness Tolerance ±0.1 mm

Component Specifications

Definition

Retaining plates, also known as bearing plates or thrust plates, are flat, typically circular or rectangular metal components with precisely machined holes and mounting features. In a Pivot Connection Assembly, they serve as critical retention elements that lock bearings, shafts, or bushings in position along their axis. They distribute axial loads evenly across the assembly, maintain preload on bearings, and ensure proper clearance between moving parts. These plates often feature tapped holes for bolts, slots for adjustment, or grooves for sealing elements, and are designed to withstand cyclic loading and vibration in mechanical systems.

Working Principle

Retaining plates work by creating a rigid barrier against axial displacement. When bolted or fastened to a housing or frame, they physically block the movement of components like bearings or gears along the shaft axis. This containment allows rotational freedom while preventing unwanted lateral shifts that could cause misalignment, wear, or failure. In pivot connections, they often work in conjunction with snap rings or locknuts to maintain precise positioning under dynamic loads.

Materials

Typically made from carbon steel (e.g., AISI 1018, 1045), alloy steel (e.g., 4140), or stainless steel (e.g., 304, 316). May include surface treatments like zinc plating, black oxide coating, or phosphate coating for corrosion resistance. High-performance applications might use aluminum alloys for weight reduction or hardened steels for increased durability.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	HRC 20-45 (depending on material)
Thickness	3-12 mm
Hole Pattern	Bolt circle or linear array
Surface Finish	Ra 1.6-3.2 μm
Flatness Tolerance	±0.1 mm
Diameter/Rectangular Dimensions	Custom to assembly

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 471, ISO 2768-m

Parent Products

This component is used in the following industrial products

Pivot Connection Assembly

A mechanical assembly that provides rotational connection between structural members, allowing controlled movement while maintaining structural integrity.

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Engineering Analysis

Risks & Mitigation

Fatigue failure from cyclic loading
Corrosion in harsh environments
Improper installation leading to misalignment
Over-torquing of fasteners causing distortion

FMEA Triads

Trigger: Insufficient thickness or material strength
Failure: Plate deformation or fracture under load
Mitigation: Use finite element analysis (FEA) to validate design; select materials with adequate yield strength; specify proper heat treatment.

Trigger: Misalignment during installation
Failure: Uneven load distribution, premature bearing wear
Mitigation: Implement precise machining tolerances; use alignment pins during assembly; follow torque specifications for fasteners.

Trigger: Corrosion due to exposure to moisture or chemicals
Failure: Loss of structural integrity, seizure of components
Mitigation: Apply protective coatings (e.g., zinc plating); use stainless steel in corrosive environments; include regular inspection schedules.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 2768-m; hole positions within ±0.1 mm; flatness within 0.05 mm per 100 mm span

Test Method

Dimensional inspection via CMM; hardness testing per ASTM E18; load testing to verify axial retention capacity; salt spray testing for corrosion resistance per ASTM B117

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 Retaining Plates

Manufacturer profiles associated with Retaining Plates.

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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 retaining plate in a pivot connection?

The primary function is to prevent axial movement of bearings or rotating elements, ensuring alignment and load distribution within the assembly.

Can retaining plates be customized for specific applications?

Yes, they are often custom-designed with specific hole patterns, thicknesses, and materials to match the requirements of the pivot connection assembly.

How do retaining plates differ from snap rings?

Retaining plates are typically bolted or fastened plates that provide more rigid axial support and better load distribution, while snap rings are spring-loaded rings that fit into grooves and are easier to install/remove but may offer less stability under high loads.

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.

Retaining Plates