Dongguan Lanbo Electronics Technology Co., Ltd.

Custom CNC Turned Brass Internal Thread Cylindrical Sleeve

Custom CNC Turned Brass Internal Thread Cylindrical Sleeve
Part No :

Custom CNC Turned Brass Internal Thread Cylindrical Sleeve product parameters

We offer full custom CNC turning services for non-standard precision components. We manufacture lathe parts strictly according to your CAD drawings, or provide engineering design support and production arrangements based on your specific requirements.

Item	Details
Product Name	Custom CNC Turned Brass Internal Thread Cylindrical Sleeve
Manufacturing Process	CNC lathe turning, outer cylindrical finishing, inner hole boring, internal thread tapping, end chamfering, deburring, surface fine polishing
Materials Available	H59 Brass, H62 Brass; customized copper alloy materials on request
Surface Treatment	Brass matte finishing, natural brass polishing, gold anodizing, anti-tarnish passivation treatment
Tolerance Standard	Dimensional tolerance: ±0.01mm; internal thread complies with ISO metric thread standard; strict concentricity control, surface roughness Ra 1.6~Ra3.2
Inspection Standards	Full dimensional detection by calipers & micrometers; thread gauge inspection, appearance defect screening, salt spray anti-oxidation sampling test; FAI first article inspection report available
Customization Service	Custom overall length, outer diameter, inner hole size, wall thickness, internal thread specifications (Metric / UNC / UNF); adjust tolerance precision and surface effect; OEM & ODM production supported per your 2D drawings, 3D files or physical samples

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Detailed description

Custom CNC Turned Brass Internal Thread Cylindrical Sleeve

We are a professional precision CNC machining factory located in Dongguan, China, specializing in custom non-standard brass machined parts. Our Custom CNC Turned Brass Internal Thread Cylindrical Sleeve is precision manufactured according to customers’ 2D drawings, 3D models and physical samples, with machining accuracy up to ±0.01mm.
This solid brass internally threaded cylinder sleeve is a widely used threaded connecting fitting. Featuring complete inner female threads and a seamless cylindrical body, it boasts excellent ductility, corrosion resistance and good electrical & thermal conductivity. It is extensively applied in plumbing piping, sanitary hardware, instrumentation equipment, pneumatic components, electronic fittings and precision mechanical assembly. We provide full OEM & ODM customized solutions to satisfy different dimensional, thread and surface finish requirements for global industrial buyers.

CNC Lathe Turning Process Introduction

CNC lathe turning is the mainstream high-precision processing technology for rotary metal parts in precision machinery, plumbing and electronics industries. With multi-axis numerical control lathes, brass bar stock undergoes programmed processing including outer circle turning, inner hole boring, internal thread tapping, end face chamfering and burr removal.
Compared with ordinary manual lathe processing, CNC turning delivers stable dimensional consistency within ±0.01mm, uniform wall thickness and smooth surface across all batches. It is widely used to produce brass threaded sleeves, bushings, threaded inserts and tubular connecting parts for plumbing, electronics and automation equipment. One-time integrated forming guarantees high concentricity and precise thread fit required for internally threaded brass cylindrical sleeves.

Structural Features & Advantages of Brass Internal Thread Cylindrical Sleeve

Our precision brass threaded sleeve is optimized for threaded connection, sealing and long-term stable assembly, with prominent performance advantages:
Precision Full Internal Female Thread: Threads are tapped strictly per international standards, enabling smooth screwing-in, tight matching and no thread loosening under vibration working conditions.
Solid Brass Monolithic Structure: Integrally turned without splicing gaps, high structural rigidity, resistant to extrusion and deformation during repeated assembly and disassembly.
Excellent Brass Material Properties: H59/H62 brass features outstanding rust resistance against water and air oxidation, ideal for humid plumbing and indoor equipment environments; good thermal & electrical conductivity fits electronic component assembly scenarios.
Customizable Matte Golden Surface: Matte brass finish retains original metallic texture; optional passivation anti-tarnish treatment effectively prevents brass oxidation and discoloration, prolonging service life.
High thread accuracy, strict concentricity and stable dimensional tolerance are core advantages of our customized brass threaded sleeves, which are ideal replacement fittings for precision pipeline and equipment connection.

Custom Service Scope for Brass Threaded Cylindrical Sleeves

We offer one-stop precision CNC machining customization for brass internal thread sleeves, brass bushings, threaded inserts and tubular copper fittings, cooperating with sanitary brands, instrument manufacturers, pneumatic component suppliers and electronic enterprises worldwide.
Available customizable products:
Matte brass cylindrical threaded sleeves, polished brass female thread sleeves, thin/thick wall brass threaded inserts, multi-spec internal thread copper connecting sleeves.
Complete production flow:
Brass bar cutting → CNC outer & inner turning → internal thread tapping → chamfering & deburring → surface finishing/passivation anti-tarnish treatment → full quality inspection → vacuum packaging.
We can also produce matched brass pipe joints and connecting accessories to support one-stop purchasing for customers.

Core Product Strengths

Ultra-precise Dimensional & Thread Control

All workpieces are processed by high-precision automatic CNC lathes. Outer diameter, total length, inner aperture and thread pitch maintain consistent batch precision; all threads pass professional thread gauge inspection to ensure smooth assembly. The minimum dimensional tolerance can reach ±0.01mm as required.

Premium Brass Raw Material, Superior Corrosion Resistance

We adopt qualified H59 and H62 brass as raw materials, free from inferior recycled copper impurities. The material has good malleability, not easy to crack during assembly, and excellent anti-rust performance for long-term use in water and humid environments.

Multiple Optional Surface Finishes

Provide matte brass, bright polishing, anti-tarnish passivation and other surface treatments. Passivation layer slows down brass oxidation and darkening, keeping golden appearance lasting longer.

Full-range Personalized Customization Support

Customers can freely customize overall length, outer diameter, inner hole size, wall thickness, internal thread standards (Metric / UNC / UNF). Tolerance grade, surface roughness and surface treatment can all be adjusted to adapt to your actual assembly and application scenarios, avoiding secondary processing costs.

Flexible Order Volume & Punctual Delivery

We accept small-batch prototype trial orders and mass bulk orders with unified strict inspection standards. Automated production lines ensure stable supply, and long-term delivery plans can be signed for regular overseas clients.

General OEM Customization Range

We provide comprehensive customized services for CNC turned brass threaded sleeves and various precision copper mechanical parts.
Optional raw materials: H59 brass, H62 brass, customized special copper alloys upon request; various bar diameters available to match drawing requirements.
Optional surface treatments: brass matte finish, mirror polishing, anti-tarnish passivation, oil sealing, etc., meeting demands of anti-oxidation, wear resistance and appearance decoration.
Service mode: Supply single finished sleeves or matched pipeline connecting components according to your demand. Our technical team will optimize workpiece structure to control production cost first, then arrange trial production before formal mass production.

Main Application Fields

Our customized brass internal thread cylindrical sleeves are widely used in the below industries:
Sanitary & plumbing systems, instrumentation & testing equipment, pneumatic automation components, electronic hardware accessories, household appliances parts, precision mechanical assembly, fluid pipeline connectors, medical device small fittings.Our customized brass internal thread cylindrical sleeves are widely used in the below industries:
Sanitary & plumbing systems, instrumentation & testing equipment, pneumatic automation components, electronic hardware accessories, household appliances parts, precision mechanical assembly, fluid pipeline connectors, medical device small fittings.

Frequently Asked Questions

FAQ 1

Q: Can you produce custom CNC turned parts according to my drawings or samples?
A: Yes, we mainly focus on OEM & ODM customized precision turning services. We accept 2D files like PDF/DWG and 3D files such as STEP, IGES. You can also send physical samples for us to reverse-engineer and optimize the structure. Our engineering team will review your design and offer professional suggestions on cost saving and manufacturability (DFM) for free.

FAQ 2

Q: What kinds of metal materials can you use for CNC turning processing?
A: We support a full range of common precision machining metals, including SUS304/SUS316 stainless steel, 1018/1045 carbon steel, 6061/7075 aluminum alloy, C36000 brass, copper and titanium. We can select suitable raw materials based on your product usage, working environment, strength requirements and budget.

FAQ 3

Q: Can I get trial samples before mass production? How long is the sample lead time?
A: Trial samples are available for all customized turning orders. The sample production cycle is 3–7 working days after drawing confirmation. After you test and confirm the sample quality and dimensions, we will arrange mass production. Small batch trial orders are also acceptable if you do not need large volume at first.

FAQ 4

Q: What surface finishing options do you provide for CNC turned metal parts?
A: We offer multiple surface treatments to meet anti-rust, anti-corrosion, wear resistance and appearance demands: passivation, electropolishing, zinc plating, nickel plating, black oxide, powder coating, anodizing for aluminum, sandblasting and polishing. If your products are exported to Europe, we can provide surface treatment that complies with RoHS and REACH standards.

FAQ 5

Q: How do you control the dimensional tolerance of precision CNC turned parts?
A: Our standard tolerance for general turned parts is ±0.01mm, and ultra-precision components can achieve ±0.005mm with grinding processes. We carry out strict three-step quality inspection: IQC for raw material incoming check, IPQC for in-process production monitoring, and FQC full dimension testing before shipment. We provide inspection reports and accept third-party quality inspection as requested.

About our company

Dongguan Lanbo Electronic Technology Co., Ltd. (Brand: LAMBOOR) was established in 2010 with 15 years of experience in precision hardware manufacturing. We own a 3,000 sq.m standardized factory and employ over 100 professional technicians, acting as an integrated one-stop manufacturer specializing in custom precision hardware structural components, covering mold development, stamping, sheet metal, CNC turning, welding and dust-free assembly.

We are fully equipped with Jinfeng/Aomate stamping machines, laser cutting machines, CNC bending machines, together with complete QC testing equipment including 2D projectors, salt spray testers and tensile testers. Certified to ISO9001:2015, we hold multiple utility model patents for hardware molds.

Our products are widely applied in consumer electronics, optical communication, medical devices, automotive and new energy electrical industries, with more than 400 customized projects completed. We maintain long-term partnerships with renowned enterprises including KYOCERA, Foxconn and RICOH.

63% of our annual RMB 30 million revenue comes from overseas exports. Our self-developed progressive mold technology cuts processing costs by 80%. We support rapid prototyping and mass production, delivering stable, cost-effective customized hardware solutions for global clients.