Custom CNC Plastic Components
Custom Machined Plastic Spacers Built to Your Drawing
SpacerMFG manufactures precision CNC turned and milled plastic spacers, standoffs, sleeves, and bushings to your exact OEM specifications.
Choose from POM, PTFE, Nylon, PEEK, UHMW, and other engineering polymers for electrical isolation, low friction, corrosion resistance, and lightweight structural performance.
±0.05 mm
Standard machining tolerance
1–300 mm
Outer diameter range
1–10 pcs
Prototype quantities supported
From rapid prototypes to repeat production
Shenzhen CNC machining for drawing-based OEM components.
Technical Specifications
Machining capability overview
We machine custom plastic spacers directly from extruded rod, tube, or sheet stock. CNC turning and milling centers process engineering plastics with careful control of heat, stress, and dimensional stability.
| Material Options | POM (Delrin/Acetal), PTFE (Teflon), Nylon (PA6/PA66), PEEK, UHMWPE, ABS, Polycarbonate (PC), PVC, PET-P |
|---|---|
| Outer Diameter (OD) | 2.0 mm to 300.0 mm |
| Inner Diameter (ID) | Down to 1.0 mm |
| Length / Height | Up to 500.0 mm |
| Standard Machining Tolerance | ±0.05 mm; tight tolerances down to ±0.02 mm depending on material and geometry |
| Surface Finish | Machined (Ra 1.6–3.2 µm), smooth polished, or vapor polished for select plastics |
| Production Volume | Prototype (1–10 pcs), low-volume (100–1,000 pcs), high-volume production (10,000+ pcs) |
| Secondary Operations | Precision reaming, tapping, internal and external threading, deburring, ultrasonic cleaning, and laser marking |
Part Configurations
Plastic spacers produced to print
Send 2D drawings in PDF or DWG format, or 3D CAD files in STEP or IGES format, for a direct quote on your required configuration.
Plain Cylindrical Spacers & Sleeves
Round spacers for load distribution, axis separation, and unthreaded standoff applications.
Stepped & Shoulder Spacers
Dual-diameter profiles for locating assemblies, aligning bearings, and passing through panel cutouts.
Threaded Standoffs
Internal or external Metric and UNC/UNF threads machined into non-conductive plastic bodies.
Flanged Bushings
Integrated flange profiles that absorb axial thrust loads or isolate fasteners from housing surfaces.
Hexagonal & Square Spacers
Wrench-flat geometries designed for assembly in tight enclosures and restricted access areas.
Process Selection
CNC machining versus injection molding
The right production process affects unit cost, tooling expense, and lead time. CNC machining is particularly well suited to prototypes, low-to-mid volume work, design changes, and heavy-wall spacer geometries.
CNC Machining
Low volume- Zero mold tooling: Avoid NRE tooling fees ranging from $2,000 to $15,000+.
- Tighter control: No sink marks, draft-angle requirements, or unpredictable molding shrinkage.
- Heavy walls: Thick-wall spacers can be produced without molding voids and warp.
- Fast iteration: Drawing updates require program modification rather than mold rework.
Injection Molding
Often considered for high-volume production where significant tooling investment can be balanced by a lower piece price.
Volume decision guide
Material Selection Guide
Match the polymer to the operating environment
Mechanical, thermal, chemical, electrical, and wear requirements all influence the best spacer material.
POM (Acetal / Delrin)
High mechanical strength, excellent dimensional stability, low moisture absorption, and smooth wear. Used for machinery spacers, precision sleeves, gears, and low-friction bushings.
PTFE (Teflon)
Exceptional chemical inertness, -200°C to +260°C temperature resistance, ultra-low friction, and high dielectric strength. Suitable for chemical processing and high-temperature isolation.
Nylon (PA6 / PA66)
High tensile strength, wear resistance, and damping properties. Suitable for wear sleeves, structural spacers, and machinery mounts. Nylon absorbs moisture.
PEEK
Extreme thermal stability up to 250°C continuous, high mechanical strength, and chemical and radiation resistance for semiconductor, aerospace, and medical equipment.
UHMWPE
Extremely high impact strength, self-lubrication, and excellent abrasion resistance for material handling guides, wear plates, and food processing spacers.
Polycarbonate (PC)
Transparent, impact-resistant, and electrically insulating for optical equipment spacers, clear guards, and electrical covers.
Quality-Controlled Production
A process designed for precision plastics
Thermal expansion, elastic recovery, and internal stress require dedicated tooling and controlled machining setups.
Stress relieving
Material conditioning before machining helps stabilize the workpiece.
High-speed CNC
Turning and milling with positive-rake, polished carbide tooling made for plastics.
Deburring
Hand deburring, high-pressure washing, or cryogenic deburring when specified.
Dimensional inspection
Climate-controlled checks using digital micrometers, optical comparators, and CMM equipment.
Plastic machining standards at SpacerMFG
Sharp, dedicated tooling: Positive-rake, polished carbide tooling prevents material smear and melt.
Coolant and heat control: Temperature-controlled air blast or specialized water-soluble coolants help prevent thermal expansion.
Burr removal: Ductile burrs are removed according to the drawing and project requirements.
Quality inspection: Critical dimensions are verified under controlled conditions with precision measurement equipment.
Industry Applications
Plastic spacers for demanding OEM programs
Industrial Automation & Robotics
Lightweight, low-wear POM and Nylon shaft spacers, linear drive isolation collars, and sensor mounting standoffs.
Electronics & Test Instrumentation
Non-conductive PTFE and Polycarbonate standoffs for PCB isolation, power supply barrier spacing, and RF shielding.
Medical & Analytical Equipment
Biocompatible, sterilizable PEEK and PTFE components for fluid handling manifolds and diagnostic instruments.
Semiconductor Manufacturing
Chemically resistant, high-purity PEEK and Teflon spacers for wafer handling modules and wet processing tools.
Automotive & Assembly Fixtures
Wear-resistant UHMW and Nylon locator sleeves, assembly jig spacers, and sliding guides.
RFQ Process
Get a line-item quotation within 24 business hours
Share your project details with our engineering team for a direct assessment of material, geometry, tolerances, finish, and production quantity.
What we need for a fast quote
- Engineering drawing: 2D PDF with tolerances and 3D STEP, IGES, or X_T files.
- Material designation: Specific polymer grade such as Delrin 150, PTFE, PEEK 450G, or Nylon 66.
- Quantity: Prototype count and expected production batch volumes.
- Surface finish and requirements: Critical tolerances, edge breaks, and special packaging specifications.
Send your plastic spacer requirements
Attach your drawings and include the target material, quantity, and any inspection or finishing requirements.
Email your prints: info@spacermfg.com
Manufacturing facility:
Response time: Within 24 business hours