Engineered for optical laboratories and eyewear distributors requiring zero-stress lens mounting, medical-grade Japanese titanium, and flawless ergonomic stability.
Unlike full-rim or semi-rimless frames that rely on eyewires or nylon filaments, rimless eyewear is a direct structural discipline where bridge and temple components attach directly to ophthalmic lenses via micro-drilled apertures.
Traditional rimless frames utilized threaded micro-screws with metallic nuts and washers. While serviceable, screw-mounted rimless frames suffer from vibrational loosening, localized torque stress, and spider-cracking around drill holes.
The bushing acts as a hydraulic damper inside the 1.4mm or 1.6mm hole, converting shearing energy into elastic deformation and eliminating metal-on-glass abrasion.
The chassis of a rimless frame must absorb lateral flex from daily donning and doffing without transferring bending force to the nasal and temporal mounting points of the ophthalmic lenses.
This allows the temples and nose bridge to flex beyond 45 degrees while maintaining exact optical centers, protecting pupillary distance (PD) calibration and cylinder axis integrity.
Specifying the correct ophthalmic lens resin is critical when purchasing rimless chassis in bulk. Standard CR-39 (1.499 allyl diglycol carbonate) displays catastrophic notch sensitivity and should never be mounted rimless.
These thermoset polyurethanes provide tensile yield strengths exceeding 40 kgf/mm², ensuring drill holes resist radial cleavage even under extreme impact testing.
| Mounting Methodology | Drill Diameter (±0.02mm) | Stress Dissipation Mechanism | Assembly Time (Laboratory) | Durability Rating (EN ISO 12870) |
|---|---|---|---|---|
| Dual-Pin Compression Plug | 1.40 mm × 2 | Elastomeric fluoropolymer expansion ring | 90 – 120 seconds | Passed > 50,000 cyclic flexures |
| Direct Micro-Screw & Star Washer | 1.60 mm | PTFE cushion washer + Loctite thread seal | 180 – 240 seconds | Prone to loosen after 10,000 cycles |
| Tension Notch / Wire Clip | Peripheral Slot Milling | Spring-loaded memory titanium claw | 60 – 90 seconds | Passed > 80,000 cyclic flexures |
| Adhesive Anchor Bonding | Blind Cavity Micro-Bore | UV-cure optical-grade epoxy polymer | 300+ seconds (Cure time) | Sensitive to high humidity / thermal shock |
How optical distributors, chain retail buyers, and brand aggregators can navigate shifting trade regulations, automated lab finishing, and sustainable ultra-light materials.
Wholesale procurement is transitioning away from fixed single-geometry rimless frames. High-volume B2B optical buyers demand modular chassis platforms where a single bridge and temple set can be configured across round, rectangle, cat-eye, and aviator drill profiles simply by altering the CNC lab finishing files.
This lowers inventory capital expenditure by 42%, while granting optical chain optometrists infinite custom shape customization directly in-store.
Screwless hinges are no longer a luxury differentiator—they have become the benchmark standard for high-reliability rimless procurement. Traditional spring-hinge screws are prone to stripping, corrosion, and customer returns.
Our proprietary screwless friction-lock connections utilize micro-machined interlocking cam geometries and medical silicone cords, eliminating warranty claims due to loose hardware while reducing overall chassis weight to below 8 grams.
Stringent compliance enforcement across the European Union (EU MDR 2017/745 Class I Medical Device regulations) and the US FDA (21 CFR 801.410 impact resistance drop-ball test) requires full factory supply chain traceability.
Every batch of titanium, nickel-free plating, silicone nose pad, and bushing resin manufactured in our Shenzhen facility comes backed by comprehensive lot certifications, REACH chemical screenings, and biocompatibility documentation (ISO 10993).
Headquartered in Singapore with a European creative studio in France and advanced precision manufacturing operations in Shenzhen, China, Urband bridges high-concept industrial design with high-yield B2B mass manufacturing.
Urband’s founder, Yang Wah Kiang, began by grinding ophthalmic lenses by hand in a Singapore workshop in the late 1950s before co-founding Nanyang Optical in 1960. This physical understanding of lens surfacing, beveling tension, and frame mounting ensures that every rimless frame we produce is architected from an optician’s perspective.
Between 2006 and 2024, our proprietary frame technologies have secured 21 prestigious international design honors, including the iF Design Award, Red Dot Award, SILMO d'Or nominations, and Singapore’s President’s Design Award. We provide global B2B buyers with proven, award-winning aesthetics that drive retail sell-through.
Our Shenzhen manufacturing hub in Hong Leong Technology Park operates 5-axis CNC machining, micro-wire EDM cutting, vacuum ion plating (IP), and automated tension assembly lines. We manage end-to-end tooling, quality assurance, pad arm laser micro-welding, and product packaging under one unified ISO 9001 quality system.
We do not issue generic boilerplate claims. Urband provides certified product-level conformity dossiers including CE Declaration of Conformity, EN ISO 12870 (Ophthalmic Optics - Spectacle Frames), EN ISO 12312-1 for sun-wear families, and comprehensive REACH Annex XVII heavy metal screening reports for nickel release.
Simplify your inventory procurement by consolidating your supply chain. Through a single Urband account, international optical chains gain immediate access to our original brands—EYELET (pediatric flexible frames), GLOSSI (vibrant fashion eyewear), URBAND PARIS (engineered optics and RX-Sport), and COUPLE (near-vision reading).
With operational bases in Singapore (GMT+8), Shenzhen (GMT+8), and Douvres-la-Délivrande, France (CET), our technical sales and design engineering teams provide seamless 24-hour response coverage. We review OEM technical CAD drawings, provide rapid CNC sample prototypes within 7 working days, and guarantee reliable production lead times.
Essential technical answers addressing mechanical tolerances, lens surfacing constraints, minimum order quantities (MOQs), and OEM branding capabilities.
Connect directly with Urband International’s optical engineering and wholesale sourcing team. Request complete technical CAD diagrams, physical sample kits, laboratory drill coordinates, and volume discount price schedules.
