Recommend Products
Precision threaded shafts for linear motion, lead screws, and custom assemblies. Tight tolerances, multiple thread forms. Ideal for robotics, automation, and medical devices. Request a quote.CustomUS $1.69 - US $3.95
CustomUS $1.25 - US $3.26
CustomUS $0.15 - US $2.68
Precision custom CNC turning in 2-axis, multi-axis, and Swiss-type. Tolerances to ±0.002 mm on aluminum, steel, stainless, brass, and titanium. Quote in 4 hours, parts in 7 days.CustomUS $1.25 - US $2.53
Precision Machined Stainless Steel Short Shafts 304 316 Drilling
Custom
Introducing our high-quality small turned parts for all your precision engineering needs. Our parts are manufactured using state-of-the-art technology and are guaranteed to meet your exact specifications. Trust us for reliable and durable components.
minimum order
1 piece
Quantity
$0.50 - $0.50
/ piece
Introducing our high-quality small turned parts for all your precision engineering needs. Our parts are manufactured using state-of-the-art technology and are guaranteed to meet your exact specifications. Trust us for reliable and durable components.
| Key Attributes | |
| Machining Capabilities | CNC Machining Processes:Broaching, Drilling, Etching/Chemical Machining, Laser Machining, Milling, Turning, Wire EDM, Rapid Prototyping |
| Materials Supported | Aluminum, Brass, Bronze, Copper, Hardened Metals, Stainless Steel, Steel Alloys, Plastic |
| Micro-Machining or Not | Micro Machining |
| Key Processes | CNC Milling, Turning, Drilling |
| Tolerance Standards | Industry-standard precision |
| Surface Treatments | Anodizing, Plasting, Polishing, etc. |
| Applications | Control Systems, Automotive Components |
| Place of Origin | Guangdong, China |
| Model Number | CUSTOM |
| Service Type | Customized OEM/ODM Manufacturing |
| Drawing Formats | PDF, CAD, IGES, STEP |
| Delivery Time | 7-30 Days |
| MOQ | 10 pcs |
· Product Overview
Introducing the YITECH Precision Rigid Shaft Coupling (Sleeve Type) — a CNC-machined, monolithic coupling engineered for zero-backlash, high-torque transmission between motors, encoders, spindles, and actuators in precision motion systems.
Each coupling delivers:
- Solid 316L stainless steel construction (standard); optional: 304 SS, 6061-T6 aluminum, or 17-4PH precipitation-hardened steel
- Dual set-screw design: Two M3 or M4 through-holes (90° apart) — for secure, non-marring shaft clamping
- Precision-bored central bore: Standard Ø6.0 mm, Ø8.0 mm, or custom (±0.005 mm tolerance)
- Mirror-polished outer surface (Ra ≈ 0.15 μm) — ensures smooth mounting and zero galling
- Tight tolerances: ≤0.008 mm concentricity (bore to OD), ≤0.005 mm bore diameter deviation — critical for encoder alignment and dynamic balance
Unlike stamped, welded, or plastic couplings (prone to runout, deformation, or screw slippage), our monolithic couplings maintain <0.01 mm radial runout even after 50,000+ hours of continuous operation — verified per ISO 14577 and DIN 6885.
Ideal for engineers building servo-driven robots, CNC spindles, medical imaging gantries, optical stages, and lab automation where positional accuracy, torque fidelity, and maintenance-free operation are non-negotiable.
· Core Specifications
| Parameter | Specification |
|---|---|
| Material | AISI 316L Stainless Steel (standard); optional: 304 SS, 6061-T6 Al, 17-4PH, Ti-6Al-4V |
| Surface Finish | • Outer OD: Mirror-polished (Ra ≈ 0.15 μm) • Bore: Fine-turned (Ra ≈ 0.4 μm), deburred • Standard: Passivated (ASTM A967, Method 1) • Optional: Electropolished (Ra 0.05 μm), black PVD |
| Standard Dimensions | • Overall length: 20.0 mm • OD: Ø12.0 mm • Bore ID: Ø6.0 mm (standard), Ø8.0 mm, Ø10.0 mm • Set-screw holes: 2× M3 (or M4), 90° apart, counterbored 2.5 mm deep • Weight: ~12 g (316L, Ø6 mm bore) |
| Tolerances | • Bore ID: ±0.005 mm • Concentricity (bore to OD): ≤0.008 mm TIR • Length: ±0.02 mm • Set-screw hole position: ±0.01 mm |
| Max Torque Capacity | • Ø6 mm bore: 3.5 N·m (static), 2.0 N·m (continuous) • Ø8 mm bore: 7.0 N·m (static), 4.0 N·m (continuous) • Higher with 17-4PH: +40% torque rating |
| Operating Temp. | -40°C to +150°C (316L); up to +250°C (17-4PH, short-term) |
| Compliance | RoHS, REACH, ISO 9001; FDA 21 CFR 177.1010; USP Class VI (for medical variants) |
· Application Scenarios
This rigid sleeve coupling excels where backlash-free transmission, high stiffness, and precise alignment are critical:
- Robotics & Automation
→ Servo motor to harmonic drive/gearbox coupling
→ Encoder-to-shaft coupling in collaborative arms
→ Linear actuator lead screw interfaces - CNC & Machine Tools
→ Spindle motor to tool holder coupling
→ Rotary table indexing drives
→ Laser cutter galvo mirror mounts - Medical Devices
→ MRI/CT gantry rotation shafts
→ Surgical robot joint actuators
→ Lab centrifuge motor couplings - Optics & Metrology
→ Precision stage stepper motor couplings
→ Interferometer mirror rotation assemblies
→ Telescope azimuth/elevation drives - Aerospace & Defense
→ UAV gimbal stabilization motors- Satellite reaction wheel interfaces
- Avionics servo linkages
💡 Why engineers choose YITECH rigid couplings:
- Monolithic = Zero Backlash, Zero Wear — unlike split or clamp-style couplings
- Dual Set Screws = Secure Clamping Without Shaft Damage (with flat-point or cone-point screws)
- 316L + Passivated = Sterile & Corrosion-Proof — ideal for cleanrooms and field use
- Custom Bore in 5 Days — no tooling fees, even for odd diameters (e.g., Ø7.2 mm)
· Production Process Introduction
· Packaging and Shipping Methods
- Standard Packaging: 1 coupling per anti-static PE bag; 200 per EPE tray; 2,000 per cardboard box.
- Bulk Options: 5,000–50,000+ units per pallet (custom foam inserts available).
- Shipping Methods:
- 📦 Express (DHL/FedEx/UPS): 3–7 business days (global)
- ✈️ Air Freight: 5–10 days (orders ≥ 1,000 pcs)
- 🚢 Sea Freight: 20–35 days (container loads)
- White-Label Services:
- Laser engraving (logo, part #, bore size)
- Branded retail boxes or blister packs
- Kitted solutions (e.g., “Motor Kit”: 100 couplings + M3 screws + torque guide)
· Frequently Asked Questions (FAQ)
Q1: What is the MOQ?
A:
A:
- Standard configuration (316L, Ø12×20 mm, Ø6 mm bore, M3 set screws): 200 pcs
- Custom bore size/material/thread: 500 pcs
- Samples: 5 pcs free for verified B2B customers (shipping paid)
Q2: What’s the lead time?
A:
A:
- In-stock designs: 5–7 working days
- Custom CAD/sketch: 7–10 working days (includes FAI, runout test, and passivation)
- Rush service (≤5 days): Available for +20% fee
Q3: Can I customize the bore size (e.g., Ø7.2 mm, Ø9.5 mm), set-screw thread (M4, UNC 4-40), add keyway, or switch to 17-4PH for higher torque?
A: Yes — full customization is our core strength:
A: Yes — full customization is our core strength:
- Bore IDs: From Ø3 mm to Ø20 mm (any decimal, e.g., Ø7.25 mm)
- Set screws: M3, M4, UNC 4-40, or metric fine (M2.5)
- Features: Keyway, O-ring groove, hex drive recess, dual-bore (for coaxial shafts), or magnetic insert
- Materials: 316L (standard), 304 SS, 6061-T6 Al, 17-4PH (high-strength), Ti-6Al-4V
- Finishes: Passivated (standard), electropolished, black PVD, or anodized Al
👉 Send a sketch, STEP file, or motor shaft spec - we’ll provide a 3D model, CMM report, and quote within 2 hours.
Q4: Is the runout truly ≤0.01 mm? Can you certify it?
A: Yes — runout is rigorously measured:
A: Yes — runout is rigorously measured:
- Test method: Mounted on hardened steel mandrel (Ø6.000 mm), rotated at 10,000 RPM
- Measurement: Dial indicator at coupling end face — max deviation ≤0.01 mm
- We provide: CMM runout report + dynamic balance data (if requested)
Q5: Do you support medical or aerospace certifications?
A: Absolutely:
A: Absolutely:
- Medical: FDA 21 CFR 177.1010, USP Class VI, ISO 10993-5
- Aerospace: AS9100 documentation, NADCAP-ready processes
- Cleanroom: Class 10,000 packaging; outgassing data (TML < 0.5%, CVCM < 0.1%)
- ESD-safe: Surface resistivity 10⁸–10¹⁰ Ω/sq (for Al variants)
· Why Choose YITECH?
✅ Monolithic + Dual Set Screws = Zero Backlash, Zero Slippage
✅ Precision-Bored = Perfect Encoder Alignment — no signal jitter
✅ 316L + Passivated = Medical & Field Ready — survives autoclaving, salt spray, and vibration
✅ Custom Bore Without Tooling Fees — even for non-standard diameters
✅ Precision-Bored = Perfect Encoder Alignment — no signal jitter
✅ 316L + Passivated = Medical & Field Ready — survives autoclaving, salt spray, and vibration
✅ Custom Bore Without Tooling Fees — even for non-standard diameters
Send Message
Comprehensive score