Disc Holder/Stem: Load Capacity Up to 500 N, Diameter 10-50 mm

Component Specifications

Definition

A disc holder/stem is a critical mechanical component in disc/seat assemblies, designed to securely fasten rotating discs (such as cutting, grinding, or separation discs) while maintaining precise axial and radial alignment. It typically consists of a stem (shaft) that provides structural support and a holder mechanism (clamp, flange, or collet) that grips the disc. This component ensures stable rotation, minimizes vibration, and transfers torque from the drive system to the disc, enabling consistent operational performance in applications like machining, processing, or material handling equipment.

Working Principle

The disc holder/stem operates on mechanical fastening and alignment principles. The stem is mounted to the machine's drive shaft or housing, providing a rigid base. The holder mechanism (e.g., a clamp or threaded connection) applies compressive force to grip the disc, ensuring it rotates concentrically with the stem. This setup minimizes runout and vibration, allowing for precise disc positioning and efficient power transmission during operation. In some designs, the stem may include features like keyways or splines to enhance torque transfer.

Materials

Common materials include carbon steel (e.g., AISI 1045 for general use), stainless steel (e.g., AISI 304 or 316 for corrosion resistance), or alloy steel (e.g., AISI 4140 for high strength). Surface treatments like hardening, plating, or coating may be applied to improve wear resistance and durability.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	50-200 mm
Max RPM	3000-6000
Diameter	10-50 mm
Tolerance	±0.05 mm
Thread Type	M6-M20 or custom
Load Capacity	Up to 500 N

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, DIN 6885

Parent Products

This component is used in the following industrial products

Disc/Seat Assembly

The critical sealing interface within a pressure relief valve that opens to release excess pressure and closes to maintain system integrity.

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Engineering Analysis

Risks & Mitigation

Misalignment leading to disc wobble
Fatigue failure under cyclic loads
Corrosion in harsh environments
Over-torquing during installation

FMEA Triads

Trigger: Improper installation or over-torquing
Failure: Stem deformation or thread damage
Mitigation: Use torque wrenches and follow manufacturer specs

Trigger: Material fatigue from cyclic loading
Failure: Cracking or fracture of the stem
Mitigation: Select high-strength materials and implement regular inspections

Trigger: Corrosion due to exposure to moisture or chemicals
Failure: Reduced structural integrity and seizing
Mitigation: Use corrosion-resistant materials or protective coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 286 IT7 grade for dimensional accuracy

Test Method

Dimensional inspection per ISO 1, torque testing, and runout measurement using dial indicators

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 Disc Holder/Stem

Manufacturer profiles associated with Disc Holder/Stem.

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Frequently Asked Questions

What is the primary function of a disc holder/stem?

It securely fastens and aligns rotating discs in machinery, ensuring stable operation and efficient power transmission.

How do I select the right material for a disc holder/stem?

Choose based on application: carbon steel for general use, stainless steel for corrosive environments, or alloy steel for high-stress conditions.

What are common failure modes for disc holder/stems?

Wear, fatigue cracking, misalignment, and loosening due to vibration or improper installation.

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.

Disc Holder/Stem