Dongguan Lanbo Electronics Technology Co., Ltd.

Custom CNC Turned Internal Thread Cylindrical Sleeve

Custom CNC Turned Internal Thread Cylindrical Sleeve
Part No :

Custom CNC Turned 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 Internal Thread Cylindrical Sleeve
Manufacturing Process	CNC precision lathe turning, outer cylinder finishing, inner hole boring, internal thread tapping, chamfering, deburring, edge trimming and pre-plating polishing
Materials Available	10# / 20# / 45# carbon steel (main), alloy steel; optional SUS304 / SUS316 stainless steel for anti-corrosion working conditions
Surface Treatment	Blue-white zinc plating, yellow zinc plating, black zinc plating, passivation treatment; phosphating, black oxide, oil sealing available on demand
Tolerance Standard	Outer diameter, length tolerance: ±0.01~±0.02mm; internal thread complies with ISO metric thread standard; inner hole concentricity strictly controlled; surface roughness Ra1.6~Ra3.2
Inspection Standards	Full dimensional measurement with micrometers & calipers; thread gauging test, plating thickness inspection, salt spray corrosion test sampling; FAI first article inspection reports can be provided
Customization Service	Custom overall length, outer diameter, inner hole size, internal thread specification (Metric / UNC / UNF), wall thickness; adjust material grade, tolerance accuracy and surface anti-rust treatment; OEM & ODM production supported according to your 2D drawings, 3D files or physical samples

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Detailed description

Custom CNC Turned Internal Thread Cylindrical Sleeve

We are a professional precision CNC machining manufacturer based in Dongguan, China. We custom produce CNC Turned Internal Thread Cylindrical Sleeves with high precision tolerance up to ±0.01mm, manufactured strictly according to customers’ 2D engineering drawings, 3D models and physical samples.
This cylindrical internally threaded sleeve is a heavy-duty mechanical ferrule widely used for hydraulic hose crimping, pipeline connection, mechanical fastening and assembly positioning. The seamless cylindrical body features precision machined inner threads for tight assembly; zinc-plated exterior delivers excellent rust resistance. It is extensively applied in construction machinery, hydraulic systems, fluid transportation pipelines, agricultural equipment and general industrial machinery. We provide complete OEM & ODM customized solutions to meet diverse pressure and assembly demands for global industrial purchasers.

Introduction to CNC Lathe Turning Technology

CNC lathe turning is one of the most reliable and high-efficiency processing technologies for rotary metal workpieces in precision machinery and hydraulic industries. With multi-axis numerical control lathe equipment, steel bar raw materials are processed via outer circle turning, inner hole boring, internal thread tapping, end face finishing, chamfering and deburring under programmed digital control.

Compared with conventional engine lathe processing, CNC precision turning guarantees stable dimensional accuracy within ±0.01mm, consistent wall thickness and uniform surface finish across batches. It is commonly adopted to produce threaded sleeves, ferrules, bushings, positioning sleeves and tubular mechanical fittings for hydraulic, automotive, engineering machinery industries. One-step integrated forming ensures perfect concentricity and thread precision required for internally threaded cylindrical sleeves.

Product Structure & Functional Advantages of Internal Thread Cylindrical Sleeve

Our precision internally threaded cylindrical sleeve is designed for pressure resistance, sealing and firm connection, with outstanding structural merits:
Precision Full Internal Thread Structure: Standardized inner thread achieves tight screw-in matching, uniform stress distribution during fastening, effectively preventing thread slipping under high pressure and vibration conditions.
Integral Cylindrical Solid Body: Thick wall structure boasts great compressive strength and burst resistance, capable of enduring high hydraulic working pressure without deformation or cracking.
Uniform Outer Cylinder Surface: Smooth machined outer wall fits perfectly with crimping equipment during hose assembly, ensuring even compression and reliable sealing performance.
Anti-corrosion Zinc Plated Coating: Electroplated zinc layer isolates air and moisture, effectively avoiding rust and oxidation, extending service life in humid outdoor and workshop environments.
Strict concentricity, precise thread fit and stable dimensional consistency are core indicators of qualified hydraulic sleeves. Our customized threaded cylindrical sleeves have become standard connecting fittings for high-pressure hydraulic pipeline systems.

Custom Service Scope for Threaded Cylindrical Sleeves

We provide one-stop CNC precision machining customization for hydraulic ferrules, internal thread sleeves, connecting bushings and tubular mechanical fittings, cooperating with hydraulic component factories, engineering machinery suppliers, fluid system enterprises all over the world.
Customizable product range:
Single-wall / thick-wall cylindrical sleeves, various internal thread specification sleeves, zinc-plated / stainless steel anti-rust sleeves, hydraulic crimping ferrules, mechanical positioning threaded sleeves.
Complete production workflow:
Raw material cutting → CNC outer circle & inner hole turning → internal thread tapping → end chamfering & deburring → polishing pre-treatment → zinc electroplating & passivation → full inspection & packaging.
All processing parameters are executed in accordance with your technical requirements. We can also customize matched hydraulic pipe joints and connecting accessories for integrated supporting procurement.

Core Product Strengths

Ultra-precise Dimensional Control & High Thread Accuracy

All sleeves are processed by automatic high-precision CNC lathes. Outer diameter, overall length, inner aperture and thread pitch maintain superb batch consistency; thread passes standard thread gauge inspection to guarantee smooth screwing. Dimensional tolerance can be tightened to ±0.01mm as requested.

High Mechanical Strength & Excellent Pressure Resistance

Select high-quality carbon steel/alloy steel as substrate, integral forging & turning forming without splicing gaps. The thick wall structure withstands high working hydraulic pressure, resistant to extrusion, impact and deformation during long-term mechanical operation.

Durable Anti-rust Surface Protection

Customizable blue white zinc, yellow zinc and black zinc plating. The compact plating layer features good salt spray resistance, preventing oxidation rusting indoors and outdoors, suitable for harsh working environments.

Flexible Full-range Personalized Customization

You can freely adjust overall length, outer diameter, inner hole size, wall thickness, internal thread standards (Metric / UNC / UNF), plating type and thickness. Tolerance grade, surface roughness and material options are all adjustable to adapt to your assembly and pressure usage scenarios, eliminating extra secondary processing costs.

Stable Production Capacity & On-time Shipment

We support small-batch prototype trial orders and mass bulk orders with unified rigorous quality inspection standards. Automated production lines ensure steady supply, and we can sign long-term delivery schedules for regular overseas customers.

General OEM Customization Range

We offer comprehensive customized services for CNC turned internal thread sleeves and all types of tubular precision mechanical parts.
Available raw materials: 10#, 20#, 45# carbon steel, alloy steel, SUS304/SUS316 stainless steel; multiple bar stock diameters optional to match your drawing demands.
Optional surface treatments: blue-white zinc plating, yellow zinc plating, black zinc plating, passivation, phosphating, black oxide, anti-rust oil sealing, meeting requirements of rust prevention, wear resistance and appearance.
Service mode: Supply individual finished sleeves or complete sets of hydraulic pipeline connecting components based on your production plan. Our technical team optimizes workpiece structure first to reduce production costs, then arranges trial production before formal mass orders.

Main Application Industries

Our customized internal thread cylindrical sleeves are widely applied in the following fields:
High-pressure hydraulic pipeline systems, construction & engineering machinery, agricultural machinery equipment, automobile fluid piping, industrial automation equipment, fluid transmission systems, hydraulic tool accessories, general mechanical assembly fasteners.

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.