Custom CNC Machined Rubber Parts

FlexiTurn manufactures custom precision CNC-machined elastomeric dust boots, delivering flash-free sealing interfaces, strict bore-to-OD concentricity, and reliable dynamic protection. Machining soft, flexible elastomers—including multi-bellow boots, lip seals, and dynamic bellows—requires specialized cutting strategies to control material elasticity, prevent tool deflection, and maintain surface integrity. FlexiTurn supplies custom components engineered for demanding industrial sealing, contamination protection, and fatigue resistance.

Precision Elastomer Machining & Trimming Processes

• Single-Setup Interface Machining: Mounting bores, sealing lips, and end faces are turned or trimmed in a single clamping cycle using vacuum/low-force workholding, eliminating re-clamping runout and holding strict bore-to-OD concentricity.
• Cryogenic CNC Machining Options: For ultra-soft or complex elastomeric geometries, temporary cryogenic freezing stabilizes the material matrix, allowing precise diamond/razor milling and micro-drilling without material tearing or localized thermal degradation.
• Edge & Flash Quality Control: Calibrated high-speed rotary cutters and micro-trimming tools ensure crisp, burr-free sealing edges and uniform wall thickness across multi-convoluted sections.
• Functional Feature Execution: Precision CNC milling, slotting, and hole punching executed on 3-axis and 4-axis soft-material workcells to complete complex secondary features on molded elastomeric blanks.

Materials & Technical Specifications

Supported Elastomers: Nitrile (NBR), EPDM, Fluorocarbon (FKM / Viton), Silicone, Natural Rubber (NR), Thermoplastic Elastomers (TPE / TPU)

Material Hardness: Shore A 30 to Shore A 90

Dimensional Tolerances: ±0.05 mm on secondary machined sealing faces

Geometric Limits: Concentricity ≤ 0.015 mm; End-face Squareness ≤ 0.02 mm

Surface Finish: Ra 0.8–1.6 μm on machined sealing interfaces

Quality Assurance & Material Traceability

Every elastomeric batch is manufactured under FlexiTurn’s ISO 9001:2015-aligned quality management system, supported by dedicated soft-material verification protocols:

• 100% Material Traceability: Original Compound Batch Certificates, Durometer Hardness Logs, and Material Test Reports (MTR) provided with every shipment.
• Optical Edge & Flash Inspection: 100% inspection of sealing lips and mounting interfaces under optical comparators to confirm zero flash, tearing, or micro-cracks.
• Functional Fit & Durometer Verification: Hardness testing per ASTM D2240 and non-contact optical CMM dimensional checks to prevent part distortion during measurement.

Why Choose FlexiTurn

• Specialized Elastomer Processing Know-How: Dedicated workcells, ultra-sharp shear tooling, and optional cryogenic cooling effectively mitigate elastic deformation, tearing, and edge degradation.
• Deformation-Free Workholding: Custom vacuum chucks and low-pressure soft jaws ensure concentric clamping without distorting delicate thin-wall bellows.
• 100% In-House Process Control: Raw compound verification, secondary turning/trimming, flash removal, and non-contact CMM inspection are conducted entirely on-site with zero subcontracting.
• Free 24-Hour DFM Engineering Review: Technical evaluations analyze draft angles, wall transitions, and machining allowances to reduce production risks and optimize unit costs.
• Strict Intellectual Property Protection: All customer drawings, CAD models, and compound formulations are secured under encrypted protocols, with NDAs executed upon request.

Partner with FlexiTurn

Submit your 2D/3D CAD drawings (STEP/IGES/PDF) with material durometer (Shore A), chemical compatibility requirements, and target batch volumes. FlexiTurn provides rapid DFM assessments and direct-factory quotations within 24 hours.

Q1. What types of machining services do you offer?

We provide comprehensive CNC turning and milling services. FlexiTurn machines are equipped with 8-station programmable turrets and support both turning and 5-axis milling operations, making them suitable for everything from simple cylindrical parts to complex multi-axis components.

Q2. What materials can you work with?

We machine a wide range of materials including carbon steel, stainless steel, aluminum, plastics, and other engineering-grade materials. If you have a specific material in mind, just send us your requirements and we'll confirm feasibility.

Q3. What is your typical lead time?

Lead times vary depending on part complexity, quantity, and material availability. For prototypes and small-batch runs, we typically deliver within 5–10 business days. For high-volume production, we'll provide a customized schedule after reviewing your drawings. Contact us with your project details for an accurate timeline.

Q4. How do you price your services?

Pricing is based on several factors: material cost, machining time, tooling requirements, setup complexity, and order quantity. We offer competitive rates for both low-volume prototypes and high-volume production runs. Request a quote with your CAD files or drawings and we'll get back to you within 24 hours.

Q5. What quality control measures do you have in place?

We follow strict quality control procedures throughout the machining process. Our CNC systems support programmable precision down to 1 μm, ensuring high accuracy and repeatability. Every batch undergoes dimensional inspection before shipping, and we can provide inspection reports upon request.