INDUSTRY COMPONENT

Fasteners (e.g., set screws)

Set screws are threaded fasteners designed to secure rotating components like agitator paddles onto shafts without protruding heads.

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Component Specifications

Definition
Set screws are headless threaded fasteners that apply compressive force through their tip to secure components onto shafts or spindles. In agitator paddle assemblies, they prevent axial and rotational movement by creating friction between the screw tip and shaft surface, typically using a pointed, cupped, or flat tip design. They are installed in threaded holes perpendicular to the shaft axis and are commonly tightened with hex keys or Allen wrenches.
Working Principle
Set screws secure components through friction and mechanical interference. When tightened, the screw tip presses against the shaft surface, creating localized deformation or indentation that prevents relative motion. The clamping force is generated by the screw's tensile strength and thread engagement, with torque directly proportional to the resulting frictional resistance.
Materials
Typically carbon steel (Grade 5, 8.8), alloy steel (Grade 8, 10.9), stainless steel (A2-70, A4-80), or brass. Heat treatment applied for high-strength versions. Surface treatments include zinc plating, black oxide, or dichromate for corrosion resistance.
Technical Parameters
  • Length 6mm to 50mm
  • Tip Type Cup point, flat point, cone point
  • Drive Type Hex socket (Allen)
  • Thread Size M4 to M20
  • Tensile Strength Up to 1200 MPa
  • Torque Specification 10-150 Nm depending on size
Standards
ISO 4026, ISO 4027, ISO 4028, DIN 913, DIN 914, ASME B18.3

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Fasteners (e.g., set screws).

set screws agitator fasteners machine screws shaft fastening hex socket screws industrial fasteners DIN 913 ISO 4026 Fasteners (e.g., set screws) Fasteners (e.g., set screws) in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Agitator Paddles

Mechanical components within a pharmaceutical tablet press feed frame that stir and homogenize powder blends before compression.

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Engineering Analysis

Risks & Mitigation
  • Vibration-induced loosening
  • Shaft damage from overtightening
  • Corrosion in chemical environments
  • Thread stripping
  • Insufficient clamping force
FMEA Triads
Trigger: Insufficient torque during installation
Failure: Paddle slippage on shaft leading to imbalance and vibration
Mitigation: Use calibrated torque wrenches and follow manufacturer specifications
Trigger: Corrosion in aggressive media
Failure: Seizure making removal impossible or thread degradation
Mitigation: Select corrosion-resistant materials (stainless steel, brass) and apply protective coatings
Trigger: Fatigue from cyclic loading
Failure: Screw fracture leading to catastrophic paddle detachment
Mitigation: Regular inspection schedules and replacement based on service hours

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 2768-m for general dimensions, thread tolerance 6g/6H
Test Method
Torque-to-failure testing, salt spray testing per ASTM B117, hardness testing Rockwell C scale

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between set screws and regular screws?

Set screws are headless and designed to secure components onto shafts by applying pressure with their tip, while regular screws typically have heads and join components through threaded holes.

How do I prevent set screws from loosening in agitator applications?

Use thread-locking compounds, double set screws in staggered positions, or spring washers. Ensure proper torque and consider knurled cup points for better grip.

What tip type is best for agitator paddle applications?

Cup point set screws are most common as they create a circular indentation that provides excellent resistance to rotation, though flat points are used when shaft damage must be minimized.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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