INDUSTRY COMPONENT

Set Screws

Set screws are threaded fasteners used to secure rotating components like gears, pulleys, and collars onto shafts by applying pressure against the shaft surface.

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Component Specifications

Definition
Set screws are headless fasteners with internal threading designed to secure one object within or against another, typically by exerting compressive force through a pointed or flat tip that contacts the shaft surface. They are commonly used in locking devices to prevent relative motion between assembled parts, ensuring precise positioning and torque transmission in mechanical systems.
Working Principle
Set screws work by creating frictional force between the screw tip and the shaft surface when tightened. The screw is threaded into a tapped hole in the outer component (e.g., collar or hub), and its tip presses directly against the shaft, preventing slippage through mechanical interference rather than clamping force from a nut.
Materials
Typically made from alloy steel (e.g., Grade 8.8, 10.9, or 12.9), stainless steel (A2/A4), or brass. Common coatings include zinc plating, black oxide, or dichromate for corrosion resistance.
Technical Parameters
  • Hardness HRC 28-45 depending on grade
  • Tip Types Cup point, flat point, cone point, oval point, half dog point
  • Drive Types Hex socket (Allen), slotted, Phillips, Torx
  • Thread Type Metric (M3-M20) or Imperial (UNC/UNF)
  • Torque Specifications Varies by size and material (e.g., M6 steel: 10-12 Nm)
Standards
ISO 4026, ISO 4027, ISO 4028, ISO 4029, DIN 913, DIN 914, DIN 915, DIN 916

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Set Screws.

set screws grub screws locking screws shaft fasteners cup point screws hex socket screws DIN 913 ISO 4026 mechanical fasteners industrial components Set Screws in Machinery and Equipment Manufacturing

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
  • Over-tightening can damage shafts
  • Improper tip selection reduces holding power
  • Corrosion in harsh environments
  • Thread stripping in soft materials
FMEA Triads
Trigger: Insufficient torque during installation
Failure: Screw loosens, causing component slippage on shaft
Mitigation: Use calibrated torque wrenches and follow manufacturer specifications
Trigger: Vibration in operational environment
Failure: Fatigue failure or loosening over time
Mitigation: Apply thread-locking adhesives and implement regular maintenance checks

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thread tolerance: 6g per ISO 965-1; length tolerance: ±0.5mm for standard sizes
Test Method
Torque-to-failure testing per ISO 898-1; hardness testing per ISO 6508; salt spray testing per ISO 9227 for corrosion resistance

Buyer Feedback

★★★★☆ 4.7 / 5.0 (37 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Set Screws meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Set Screws arrived with full certification."

"Great transparency on the Set Screws components. Essential for our Machinery and Equipment Manufacturing supply chain."

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Frequently Asked Questions

What is the difference between cup point and flat point set screws?

Cup point screws have a concave tip that digs into the shaft surface for maximum holding power, while flat point screws distribute pressure over a larger area, minimizing shaft damage and allowing repositioning.

How do I prevent set screws from loosening under vibration?

Use thread-locking compounds (e.g., Loctite), apply proper torque, select cup point tips for better grip, or use double set screws in staggered configurations.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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