Capillary Tube OEM Manufacturing for Needle Components
Surgical Needle Manufacturing: Precision & Reliability
Surgical needles are among the most critical components in medical applications. A single needle must meet exacting standards for sharpness, dimensional accuracy, material strength, and surface quality. As an experienced surgical needle OEM manufacturer, we produce stainless steel hypodermic needles, biopsy needles, and specialty surgical needles for global medical device companies.
Types of Surgical Needles We Manufacture
Hypodermic Needles
| Gauge | OD (mm) | ID (mm) | Common Applications |
|---|---|---|---|
| 25G | 0.508 | 0.260 | Intramuscular injection, blood sampling |
| 27G | 0.406 | 0.216 | Subcutaneous injection, insulin delivery |
| 30G | 0.305 | 0.152 | Insulin pen needles, pediatric use |
| 32G | 0.234 | 0.102 | CGM sensors, micro-fluidic applications |
Biopsy Needles
- Core Biopsy Needles: OD 1.0-2.0mm, wall 0.1-0.2mm, for tissue sampling
- Fine Needle Aspiration (FNA): OD 0.5-0.8mm, ultra-sharp bevel for cellular sampling
- Automotive/Biopsy Cutting Needles: 420J2 stainless steel, hardened to 50-55 HRC
Specialty Surgical Needles
- Laparoscopic Access Needles: Veress needles for insufflation
- Acupuncture Needles: OD 0.16-0.35mm, precision sharp tips
- Dental Needles: Endodontic files, periodontal probes
- Veterinary Needles: Large bore, high-wall thickness for animal applications
Material Selection
| Grade | Standard | Hardness | Applications |
|---|---|---|---|
| 304 | ASTM A269 | ≤92 HRB | General needles, non-sterile instruments |
| 316L | ASTM A269 | ≤95 HRB | Implantable, biocompatible needles |
| 316LVM | ASTM F138 / ISO 5832-1 | ≤95 HRB | Surgical implants, orthopedic devices |
| 420J2 | ASTM A276 | 50-55 HRC | Surgical blades, cutting needles, scissors |
Manufacturing Process for Surgical Needles
- Tube Selection — Certified stainless steel capillary tube with EN 10204 3.1
- Precision Cutting — Laser or rotary cutting to exact length
- Bevel Grinding — Multi-angle bevel (15°-30°) for sharp penetration
- Tip Forming — Trocar tip, cutting tip, or blunt tip per application
- Electropolishing — Ultra-smooth surface (Ra ≤0.2μm) for easy tissue penetration
- Passivation — Nitric or citric acid passivation for corrosion resistance
- Cleaning & Packaging — Ultrasonic cleaning, cleanroom packaging, sterile or non-sterile
- 100% Inspection — Dimensional, sharpness, visual, leak testing
Quality Control
| Test | Method | Standard |
|---|---|---|
| Dimensional (OD, ID, Length) | Laser micrometer, optical measurement | ISO 7197 |
| Sharpness | Penetration force test | ASTM F1996 |
| Breaking Force | Tensile testing | ISO 7197 |
| Fluid Flow | Flow rate at specified pressure | ISO 7197 |
| Surface Quality | Visual, profilometer | Ra ≤0.2μm |
| Biocompatibility | ISO 10993 testing | Cytotoxicity, sensitization, irritation |
OEM Services
- Custom gauge and length manufacturing
- Special bevel angles and tip configurations
- Coated needles (PTFE, silicone lubrication)
- Needle hub assembly and integration
- Private labeling and custom packaging
- Full documentation: MTR, CoC, EN 10204 3.1
Request a Quote
Send us your specifications — gauge, length, bevel angle, tip type, quantity — and receive a competitive OEM quote within 24 hours. Free samples available for testing and evaluation.
Healsmed
Leading Stainless Steel Capillary Tube Factory. 1,400+ standard sizes IN STOCK & ready to ship worldwide! High precision, factory-direct price.
