Home › Products › 04 Flanges, Bushings & Wire Protection › Plastic Mounting Flanges
Structural front and rear motor mounting flanges engineered to replace heavy, expensive die-cast aluminum or CNC-machined steel plates. Molded in high-rigidity 30%–50% glass-fiber reinforced PA66+GF and PPS with in-mold overmolded knurled brass threaded inserts—delivering rust-proof durability, electrical isolation, and vibration damping.
✓ In-Mold Knurled Brass Threaded Inserts
✓ 100% Pilot Bore & Flatness Verified
✓ Lightweight Metal-to-Plastic Savings
PRECISION TOLERANCE
CORE POLYMERS
SAFETY & COMPLIANCE
TOOLING & LEAD TIME
WHY ENGINEERS CHOOSE RUNHENG PLASTIC MOUNTING FLANGES
Diamond-knurled brass threaded bushings (M3 / M4 / M5 / M6 or custom) are overmolded directly into the flange bosses—resisting high bolt-tightening torque and axial pull-out without stripping or cracking.
Honeycomb structural rib design combined with low-warpage GF-modified PPS/PA66 maintains ±0.02mm pilot boss concentricity and mounting face flatness across thermal cycles.
Eliminates galvanic corrosion, breaks ground-loop electrical noise between the motor and chassis, and dampens high-frequency structural resonance.
Mounting bolt circles, pilot steps, O-ring sealing grooves, and brass threads are completed in one injection shot—cutting part cost by 30%–50% vs. CNC metal flanges.
TECHNICAL SPECIFICATIONS
Available Base Resins
High-Rigidity PA66+GF (30%–50% Glass Fiber), PPS+GF, PPA+GF, PBT+GF (DuPont / BASF Partners)
Flame Retardancy Grade
UL94 V-0 Certified
Embedded Metal Inserts
C3604 Brass or Stainless Steel Knurled Threaded Inserts (In-Mold Overmolded or Ultrasonic)
Flatness & Pilot Tolerance
±0.02mm on Central Pilot Boss, Bearing Seat & Bolt Hole Pitch Circle
Thermal & Chemical Rating
-40°C to 220°C+ Continuous Operation; Resistant to Oils, Coolants & Humidity
Mold Machining Standard
High-Speed CNC, Swiss Charmilles Wire EDM & Vertical Insert Molding Presses
Quality & Defect Control
≤ 50 PPM Defect Rate; 100% Flatness, Hole-Pitch & Insert Torque Sampling
Certifications
ISO 9001:2015, ISO 14001:2015, UL Process Certified, RoHS & REACH
STANDARD & CUSTOM CONFIGURATIONS
Round adapter flanges with pre-embedded brass nuts and precision centering pilots for gearmotors, pumps, and valves.
Inquire Circular Flanges → Heavy-duty ribbed square flanges for NEMA 17/23/34 stepper and BLDC motors in 3D printers and automation.
Request Custom Quote → One-piece front housings combining the external mounting flange, internal bearing pocket, and shaft seal groove.
Discuss Metal Replacement →HOW WE GUARANTEE CONSISTENCY
Optimized glass-fiber length and mineral-filled polymer blends prevent dish-warping on flat disk geometries.
Threaded mold locating pins hold brass nuts perpendicular to the mounting face with zero plastic flash inside threads.
Verified on granite surface plates, optical CMMs, and destructive bolt-torque testers before shipment.
04 / FLANGES, BUSHINGS & WIRE PROTECTION FAMILY
FAMILY 04 · SIBLING COMPONENT
High-concentricity rotor shaft sleeves, axial thrust washers, bearing isolating bushings, and high-heat thermoset Phenolic (Bakelite) coil supports.
Explore Shaft Bushings & Phenolic Parts →FAMILY 04 · SIBLING COMPONENT
Essential lead-wire exit protectors engineered to shield motor power and encoder cables from sharp stamped-metal housing edges, bending fatigue, and axial pull-out forces.
Explore Wire Bushings & Grommets →FAMILY 04 · SIBLING COMPONENT
Complete your motor assembly with one-stop auxiliary sealing and phase-insulation components.
Explore Gaskets & Insulating Films →DIRECT ENGINEERING SUPPORT
Upload or email your 2D/3D component drawing (STEP, IGES, DWG, PDF) or share your component geometry. Free standard stock samples are available (freight collect), and custom DFM reviews are returned within 24 business hours.
✓ Free Standard Stock Samples (Freight Collect)
✓ 24-Hour Engineering DFM & Quote Response
✓ 100% NDA Confidentiality Protection
Fill out the project specs below or attach your CAD files. Our engineering team responds within 24 business hours.
