316L Stainless Steel Round Bar Tapping for Reliable CNC Milling

• Customization: Available
• Certification: ISO9001, ISO13485
• Standard: GB
• Model NO.: Y 2661
• Customized: Customized
• Material: Stainless Steel
• Application: Metal Processing Machinery Parts
• Appearance: Electropolishing Passivation
• Processing: CNC Milling
• Secondary Processing: Sandblasting Scale
• Transport Package: Vacuum Packaging Cardboard Box
• Specification: 6.0*65
• Trademark: yue lin sen
• Origin: Dongguan, Guangdong
• HS Code: 7301200000
• Production Capacity: 51000pieces/Year
• Package Size: 30.00cm * 25.00cm * 15.00cm
• Package Gross Weight: 3.800kg

Product Description

316L Stainless Steel Round Bar Tapping for Reliable CNC Milling

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Product Description
Specializing in 316L stainless steel bar precision machining, focusing on threading and long shaft CNC milling. Leveraging 316L's corrosion resistance and biocompatibility, producing vital parts for medical, marine, pharmaceutical, and industrial applications needing extended length, stability, and reliable threads.

Product Processing
Material Prep: Source certified 316L stainless bar (ASTM A276). Precision cut to required lengths, often stress-relieved for long shafts.
Long Shaft CNC Milling/Turning:

Primary Turning: CNC lathe for precise diameters, tapers, and geometries over long lengths.
Shaft Milling: Use CNC centers with live tooling lathes/4-5-axis mills for flats, keyways, slots, and profiles.
Process Stability: Use steady rests, follower rests, and tooling to minimize deflection and vibration.
Precision Threading/Tapping:

Thread Milling: CNC cutter helically interpolates threads. Best for large diameters and complex threads.
Tapping: For small/through holes, using rigid tapping cycles with synchronized spindle/feed.
Thread Rolling: Cold-forming for strong, smooth external threads by displacing, not cutting, material.
Heat Treatment (Optional): Solution annealing 316L to restore corrosion resistance after significant cold work.
Surface Finishing:

Deburring & Radiusing: Essential for threads and edges.
Electropolishing & Passivation: For smooth, corrosion-resistant surfaces, vital for medical/food-grade use.
Technical Parameters

Base Material	Alloy	316L Stainless Steel(UNS S31603). Low carbon content (<0.03%) for superior corrosion resistance, especially against weld decay.
	Standards	ASTM A276 (Bar), ASTM A479 (Stainless Steel for Machine Parts), ISO 5832-1 (Implants).
	Key Properties	Excellent corrosion resistance (Mo content), good mechanical properties, non-magnetic in annealed state, biocompatible.
Material Form & Size (Input)	Form	Round Bar (Rod).
	Diameter Range (Raw Material)	Common:10 mm - 100 mm diameter. Larger diameters available.
	Length (As-supplied)	Standard mill lengths (e.g., 3m, 6m). Cut to required blank length.
Long Shaft Machining	Maximum Finished Shaft Length	Up to1500 mm(longer possible with specialized setups).
	Diameter Tolerance (Turned/Milled)	Standard:±0.025 mm.Precision:±0.01 mm.High-Precision:±0.005 mm.
	Straightness Tolerance	Critical for long shafts. Achievable:0.02 mm per 300 mmor better.
	Surface Finish (Shaft Body - Ra)	Turned:0.8 - 1.6 µm.Ground:0.2 - 0.4 µm.Polished:< 0.1 µm.
	Features	Keyways, splines, flats, grooves, cross-holes, tapered sections.
Threading/Tapping	Thread Types	Metric (M), Unified (UNC/UNF), Whitworth, Acme, Buttress, Custom.
	Thread Standards	ISO (Metric), ASME/ANSI B1.1 (Unified Inch), DIN, JIS.
	Thread Size Range	Internal (Tapped Holes):M3 to M30 (or equivalent). External (Threaded Shafts):M6 to M80 and larger.
	Thread Quality Class	Metric:4H, 5H, 6H (internal); 4g, 6g (external). Unified:2B, 3B (internal); 2A, 3A (external).
	Threading Method	Thread Milling (Preferred):Highest accuracy, better surface finish, versatile. Tapping:For smaller through-holes. Thread Rolling:For strong, work-hardened external threads.
Tolerances (General)	Geometric Tolerances	Concentricity, circularity, parallelism, perpendicularity per ISO 1101 or ASME Y14.5.
Surface Treatment	Standard Finish	Passivation (per ASTM A967)to maximize corrosion resistance.
	Enhanced Finishes	Electropolishing:For superior smoothness and cleanability. Bead Blasting:For uniform matte appearance.
Corrosion Resistance	Testing Standard (Optional)	ASTM B117 (Salt Spray), ASTM G48 (Pitting and Crevice Corrosion).
Certification & Traceability	Material Certification	Mill Test Certificate (MTC) provided for each heat/lot of material.
	Part Traceability	Laser marking of part number and lot code possible.
Production Lead Time	Prototype/Small Batch	4 - 8 weeks(depending on complexity).
	Production Run	8 - 14 weeks(volume and complexity dependent).

Company Profile

Dongguan Yu Lin Sen Metal Technology Co., Ltd.: Has obtained theGB/T 19001-2016/ISO 9001:2015 quality system certification, as well as the GB/T42061-2022/ISO 13485:2016 medical device quality system certification. Focuses on the research and production of non-standard metal medical device precision parts, mainly as machined metal products. It possesses dozens of high-precision engra-ving lathes and CNCequipment,including CNC numerical control, numerical control centering machine, automatic lathes, turningmilling combined machines, precision laser cutting processing of stainless steel capillary tubes and stainless steel thin-walled tubes for sec-ondary processing. Main materials: stainless steel tubes, stainless steel, copper, aluminum alloy, etc. for non-standard processing and customization. Widely applied in tools, electronics, electrical appliances, medical devices, automotive parts, transportation, and other industries. The company has been recognized by the industry for its "quality-oriented, honest operation" philosophy, mainly providing
non-standard part prototyping and batch production processing, supporting custom drawings and sample customization, etc. The process flow is stable and efficient, integrating industry and trade for rapid delivery, with craftsmanship spirit ensuring quality, without middlemen, excellent value for money, and the company adheres to the business philosophy of "customer first, quality first, striving for excellence, win-win cooperation", "Confident and reliable after-sales guarantee!!!".

Product Advantage

It has obtained the quality system certification in accordance with GB/T 19001-2016/ISO 9001:2015, as well as the medical device quality system certification in accordance withGB/T 42061-2022/ISO13485:2016. We focus on processing and customizing products for medical device hardware, and we have dozens of precision CNC lathes and precision laser cutting processing equipment. We also have a R&D team composed of senior engineers and technicians. We are committed to providing customers with high-quality and
high-precision processing and customization services for hardware parts, ensuring that each product meets the strict standards and requirements of the medical device industry. Through continuous optimization of production processes and improvement of technical levels, we can meet the diverse needs of customers and contribute to the development of the medical device industry.

Certifications