Set Screws are headless, fully threaded fastening components designed to secure mechanical parts without requiring a protruding head. Instead of clamping like a bolt, they generate holding force through direct tip pressure against a mating surface.
This design makes Set Screws especially useful in compact assemblies where space is limited and surface flushness is required.
In industrial systems, they are commonly used to lock gears onto shafts, fix pulleys in position, and maintain alignment in precision assemblies.
Unlike standard fasteners, a Set Screw does not rely on tensile clamping force alone. It creates a localized compressive force that prevents movement through friction and indentation.
Set Screws work by converting tightening torque into concentrated pressure at the tip, creating a secure locking force between components such as shafts, gears, or collars.
When installed into a tapped hole, the screw advances until the tip contacts the surface. Further torque generates axial force that presses the tip against the part, producing friction and slight surface indentation that prevents movement.
Unlike clamping fasteners, Set Screws rely on direct point-contact pressure rather than head tension, making them ideal for compact mechanical assemblies.
Locking performance depends on tip design, material hardness, installation torque, and material pairing between components.
Types of Set Screws
- Cup Point: high grip, general shaft locking
- Cone Point: deep penetration, maximum holding force
- Flat Point: surface protection, adjustable use
- Dog Point: precise alignment in locating systems
- Oval Point: balanced grip and reduced surface damage
Drive Types: Hex socket, slotted, Torx
Materials: Stainless steel, alloy steel, carbon steel, custom CNC materials
Key Features of Key-CNC Set Screws
At Key-CNC, Set Screws are manufactured with strict dimensional control and industrial-grade consistency.
Precision CNC thread machining for consistent engagement
01
Tight tolerance control for repeatable assembly performance
02
Stable torque behavior across production batches
03
Compatibility with ISO / DIN / ANSI fastening systems
04
Surface finishing options for enhanced durability
05
Applications of Set Screws
Set Screws are widely used in mechanical and engineering systems where compact locking is required.
Industrial Machinery
- Gear locking systems
- Shaft positioning
- Bearing collar fixation
Automation Equipment
- Robot arm joints
- Linear motion modules
- Servo motor assemblies
Precision Instruments
- Optical alignment fixtures
- Measuring devices
- Calibration equipment
Automotive Systems
- Transmission components
- Engine accessory locking
- Rotational assemblies
Why Choose Key-CNC
Key-CNC's manufacturing process is structured around repeatable machining stability and controlled production variables. This includes CNC-based thread forming, verified torque behavior across batches, and material traceability aligned with industrial procurement requirements.
Instead of focusing on single-unit performance, production control emphasizes batch-to-batch consistency, which is critical in shaft locking and precision alignment applications where tolerance variation can affect system stability.
Quality verification is integrated into each production stage, including dimensional inspection, thread gauge validation, and material hardness checks. This reduces variability in fastening performance during long-term mechanical operation.
For applications requiring non-standard geometries or specific mechanical constraints, production parameters can be adjusted at the machining stage rather than post-processing, allowing controlled adaptation to engineering requirements.
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