Dongguan Lanbo Electronics Technology Co., Ltd.

Custom CNC Turned Multi-Segment Knurled Hollow Sleeve

Custom CNC Turned Multi-Segment Knurled Hollow Sleeve
Part No :

Custom CNC Turned Multi-Segment Knurled Hollow 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 Multi-Segment Knurled Hollow Sleeve
Manufacturing Process	Multi-axis CNC turning, internal boring, multi-segment straight knurling, shoulder turning, chamfering and precision deburring
Materials Available	6061 / 7075 aluminum alloy, C36000 brass, H59/H62 brass, SUS304 / SUS316 stainless steel, 1045 carbon steel
Surface Treatment	Mechanical polishing, sandblasting, anodizing, nickel plating, zinc plating, passivation, black oxide coating
Tolerance Standard	Dimensional tolerance ±0.01mm; consistent knurl profile; precise inner hole concentricity; uniform segment width; controlled outer diameter roundness
Inspection Standards	CMM dimensional inspection, knurl dimension verification, concentricity test, surface roughness measurement, visual appearance inspection under ISO quality system
Customization Service	Custom inner bore diameter, outer diameter, total length, number of knurl segments, knurl pitch and shoulder dimensions according to your 2D/3D drawings or samples; prototype sampling, OEM & ODM mass production supported

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Detailed description

Custom CNC Turned Multi-Segment Knurled Hollow Sleeve

Our Custom CNC Turned Multi-Segment Knurled Hollow Sleeve is a hollow cylindrical machined part with segmented straight knurling on the outer surface. As a professional Dongguan-based CNC turning manufacturer, we produce customized knurled sleeves with ±0.01mm high precision tolerance for global plastic molding, electronic assembly and automation equipment suppliers. Drawing-based OEM & ODM services are available, allowing flexible adjustment of inner bore, outer diameter, total length, knurl segment quantity and knurl pitch. The segmented knurling greatly enhances embedding friction, widely used as embedded inserts, locating bushings and connecting fittings in plastic injection molds and precision mechanical assemblies.

Introduction to CNC Lathe Turning Technology

CNC lathe turning is one of the most precise and efficient manufacturing methods for rotational metal components used in industrial automation and precision equipment. Using programmable multi-axis turning centers, metal bars are processed through continuous cutting, facing, grooving, threading and boring with computer-controlled accuracy.
Compared with manual machining and conventional milling, precision CNC turning achieves stable dimensional tolerance down to ±0.01mm, smooth surface quality and outstanding consistency during mass production. It is widely applied to fabricate pins, shafts, bushings, connectors and threaded parts for mold, electronics, medical, automotive and automation machinery.
Equipped with secondary knurling and cutting capacity, CNC turning supports complex customized profiles including stepped cylinders, grooved structures and knurled features, satisfying diversified precision positioning component demands for industrial equipment.

What Is Multi-Segment Knurled Hollow Sleeve & Its Industrial Function

A multi-segment knurled hollow sleeve is a hollow cylindrical insert with separated knurl sections. The raised knurl texture increases surface friction, enabling firm locking after being embedded into plastic or composite materials to prevent rotation and slipping.
Uniform knurl depth, consistent segment spacing and good concentricity are critical to reliable embedding performance. Uneven knurl processing will lead to insufficient bonding force and loose assembly. For injection molding and electronic assembly projects, custom CNC turned multi-segment knurled hollow sleeves are essential embedded metal inserts to strengthen structural connection.

Custom CNC Turned Multi-Segment Knurled Hollow Sleeve

We provide one-stop custom CNC turning solutions for multi-segment knurled hollow sleeves, serving plastic mold manufacturers, electronic component factories and automation equipment suppliers worldwide.
Our product lineup covers multiple knurled insert types: multi-segment straight knurl hollow sleeves, single-section knurled bushings, stepped knurled inserts, thin-wall hollow knurl sleeves and non-standard customized embedded fittings.
All products are machined on multi-axis CNC lathes, including internal boring, outer diameter turning, segmented knurling, shoulder machining, chamfering and deburring. All manufacturing processes are strictly implemented according to your 2D/3D engineering drawings. Apart from separate knurled sleeves, matched supporting parts can be supplied to streamline your procurement and assembly workflow.

Key Advantages of Our CNC Turned Multi-Segment Knurled Hollow Sleeve

Uniform multi-segment knurling for reliable embedding

Processed on multi-axis CNC turning equipment, every knurl segment maintains consistent depth and pitch. The segmented layout delivers strong anti-slip and anti-rotation performance after embedding into plastic materials.

Fully customizable structural parameters

Besides turning and boring, we support segmented knurling, shoulder machining and chamfering. The number of knurl sections, segment width and knurl pitch can be tailored to fit your mold design requirements.

Diversified material options for different working conditions

Selectable aluminum, brass, stainless steel and carbon steel materials to meet lightweight, conductive, corrosion-resistant and high-strength demands. Multiple surface treatments further improve durability and oxidation resistance.

Flexible dimensional customization

Inner bore size, outer diameter, overall length and shoulder positions can be modified freely based on your drawings or physical samples. New non-standard structural designs are accepted for new product development.

Complete production capacity from prototype to bulk orders

We support small-batch prototype trial runs and large-volume mass production. Unified quality control standards are adopted for all batches to satisfy long-term purchasing plans for global industrial customers.

OEM Custom Service Scope

We provide comprehensive customized solutions for custom multi-segment knurled hollow sleeve and all types of precision CNC turned components. For material options, we supply 6061/7075 aluminum alloy, C36000 brass, H59/H62 brass, SUS304/SUS316 stainless steel and 1045 carbon steel, with abundant bar stock specifications to fit your design requirements.
Our custom product range includes locating pins, bushings, stepped shafts, threaded fittings and other rotational precision machined parts according to your specifications. Available surface finishing includes passivation, nickel plating, zinc plating, anodizing, sandblasting and mechanical polishing to meet anti-corrosion, conductive and appearance requirements.
We offer single component supply and combined kitted parts based on your assembly workflow. Custom tooling will be developed according to your drawings or physical samples. Small batch prototype testing is available before formal mass production.

Typical Application Scenarios

Our Custom CNC Turned Multi-Segment Knurled Hollow Sleeve is widely used in plastic injection molding embedded inserts, electronic product assembly locating bushings, automation machinery connecting components, household appliance structural fittings, sensor housing embedded parts and communication equipment assembly hardware.

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.