Custom Precision Set Screws & Grub Screws
Engineered for zero-deviation positioning in high-end automation. We deliver ultra-precise set screws with 0.05mm tolerances, custom point geometries, and 10-day rapid prototyping.
Product Introduction
Industry pain points and background
In high-end automation, robotics, and optical instruments, securing pulleys, gears, and shafts requires absolute precision. Standard set screws often suffer from stripped hex drives, poor thread engagement, or dimensional inconsistencies, leading to slippage, calibration drift, and catastrophic mechanical failure. You need micro-fastening solutions that guarantee perfect concentricity, zero-deviation positioning, and immense holding power under dynamic loads.
Core Product Details
Guanbiao manufactures ultra-high precision set screws (also known as grub screws) designed for critical fastening, locating, and aligning applications. Using advanced precision thread rolling and CNC machining, we produce screws with flawless thread pitch and strict 0.05mm tolerances. Whether you need cup points for maximum shaft grip, flat points for frequent resetting without marring, or custom dog points for permanent locating in keyways, we deliver custom fastening solutions engineered to lock your most demanding assemblies securely in place.
Key Features
1: 0.05mm Ultra-High Precision Tolerances
Ensures perfect interference fit and zero deviation
2: Anti-Stripping Drive Geometry
Precision-broached sockets for maximum torque transfer
3: Application-Specific Points
Cup, Flat, Cone, and Dog points available
4: High-Tensile & Wear-Resistant
Heat-treated alloys to withstand immense compressive stress
5: Micro-Sizing Capabilities
Sub-miniature sizes for delicate optics and medical devices
Product Showcase
Material Capabilities
Materials We Work With
Mechanical Testing
High-Tensile Alloy Steel (Grade 12.9 / 45H for extreme hardness and wear resistance); Stainless Steel (304, 316 for anti-rust; 410, 420 for hardened wear resistance); Brass (for soft shafts to prevent marring).
Material Strategy
Set screws bear immense compressive stress. We strictly utilize high-grade, fatigue-resistant alloys combined with precise heat treatments to prevent the drive socket from stripping under high installation torque. All materials are RoHS/REACH compliant with full Material Test Certificates (MTC).
Surface Finishes
Surface Finishes for Protection & Locking
Black Oxide
The industry standard finish for alloy steel set screws. Provides mild corrosion resistance without altering precise dimensional tolerances.
Zinc Plating / Zinc-Nickel
Enhanced corrosion protection for industrial machinery and automotive transmission components.
Passivation
Maximizes the natural rust resistance of 300-series stainless steel in cleanrooms, semiconductor equipment, and medical environments.
Anti-Loosening Patches (Nylok)
Pre-applied nylon patches to ensure the set screw resists loosening under extreme high-frequency vibration in motors and robotics.
Technical Capabilities
Manufacturing Capabilities & Tolerances
| Max Part Size | Custom micro-sizes starting from M1.0 up to heavy-duty industrial specifications. |
| Tolerances | Strictly maintained to ± 0.05mm. |
| Capabilities | Precision Thread Rolling + Advanced CNC Machining (for specific point geometries). |
| MOQ | Flexible / Small-Batch Trial Supported. |
Why Choose Us
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Featured Projects
Typical Precision Fastening Applications
Project 1
● Project Name: Industrial Robot Arm Calibration
● Challenge: Slipping gears in a robotic joint caused unacceptable calibration drift during high-speed operations.
● Solution: We engineered a custom 12.9-grade dog point set screw with a precise ± 0.05mm tolerance. The dog point locked perfectly into the shaft's keyway, permanently eliminating the slippage and restoring absolute robotic precision.
Project 2
● Project Name: Medical Optical Instrument Assembly
● Summary: Supplied ultra-miniature (M1.4), non-magnetic 316 stainless steel flat point set screws for a surgical microscope manufacturer. The flat point allowed for precise lens calibration without marring or scratching the delicate internal metal tracks.
Applications
Industrial Robotics & Automation
Optical Instruments & Cameras
Medical Devices
Semiconductor Equipment
FAQ
Cup points are best for a strong grip on shafts. Flat points are ideal for frequent adjustments or thin-wall applications. Dog points are used when mating with a pre-drilled hole or keyway, and Cone points offer permanent, high-pressure locking.
We use premium high-tensile alloy steels combined with precise case-hardening processes. Additionally, our drive sockets are broached with extremely tight tolerances to ensure a perfect fit with your installation tools.
Yes. Our advanced equipment allows us to produce sub-miniature precision set screws (starting from M1.0) commonly required in high-end optics, cameras, and medical devices.
Absolutely. We understand that testing different point styles and lengths is crucial during R&D. We offer flexible MOQs to support your trial phases.
Yes. We can pre-apply Nylok or other thread-locking compounds to the threads to ensure the set screws remain securely in place even under severe mechanical vibration.
Yes, full Material Test Certificates (MTC) and dimensional inspection reports are provided to meet your strict quality assurance and industry compliance standards.