FAMILY 02 · SIBLING COMPONENT
2.1 Motor Plastic End Caps
Front and rear structural motor end housings engineered to seal internal stator/rotor assemblies, locate ball or sleeve bearings, and dampen operational vibration.
Explore Motor End Caps →Home › Products › 02 End Caps & Covers › Encoder Back Covers
Impact-Resistant Motor Encoder Protective Back Covers
Precision-sealed rear enclosures engineered to shield delicate optical codewheels, magnetic hall sensors, and feedback PCBs against industrial dust, moisture, oil mist, and mechanical impact. Molded in high-impact modified PA66+GF, PC+ABS, and PPS for servo and closed-loop stepper motors.
✓ Dustproof & Moisture-Sealed Fit
✓ High Impact & Crush Resistance
✓ Chemical & Oil-Mist Corrosion Proof
PRECISION TOLERANCE
±0.02mm Mating Rim
CORE POLYMERS
PA66+GF, PC+ABS, PPS, PBT
SAFETY & COMPLIANCE
UL94 V-0 · RoHS/REACH
TOOLING & LEAD TIME
15–25 Days T1 · 7–10 Days Insert Swap
WHY AUTOMATION ENGINEERS CHOOSE RUNHENG ENCODER COVERS
Reliable Environmental Shielding for Closed-Loop Motor Feedback
01. Precision Dust & Moisture Sealing Lip
Tightly toleranced perimeter tongue-and-groove sealing interfaces (±0.02mm) mate flush with motor rear end bells and waterproof gaskets—preventing particulates from fouling optical encoder disks.
02. Drop-Impact & Mechanical Shock Protection
Toughened engineering polymer blends absorb external impacts during motor shipping, robotic arm collisions, and harsh factory floor installation.
03. Chemical, Coolant & Weather Endurance
Resists cutting fluid mist, industrial lubricants, UV aging, and thermal cycling (-40°C to 180°C+) without stress cracking or discoloration.
04. Custom Cable Gland & Connector Cutouts
Side or rear exits can be molded directly with aviation plug mounts, strain-relief grommet slots, or threaded brass inserts—requiring zero post-molding drilling.
TECHNICAL SPECIFICATIONS
Encoder Back Cover Engineering Parameters
Available Base Resins
Toughened PA66+GF, Flame-Retardant PC+ABS, Modified PPS, PBT (DuPont / BASF Partners)
Flame Retardancy Grade
UL94 V-0 Certified
Environmental Protection
Engineered for IP54 / IP65 / IP67 Sealed Motor Assemblies (When paired withRUNHENG gaskets)
Dimensional Tolerance
±0.02mm on Mating Rabbet Rim & Mounting Hole Pitch
Surface Finish Options
Sodick Mirror-EDM Smooth Finish or Fine Industrial VDI Matte Texture
Frame Size Compatibility
Standard NEMA 17 / 23 / 24 / 34 / 42 & Custom 40mm–130mm Servo Frames
Quality & Defect Control
≤ 50 PPM Defect Rate; 100% Rim Flatness & Drop-Impact Sampling
Certifications
ISO 9001:2015, ISO 14001:2015, UL Process Certified, RoHS & REACH
STANDARD & CUSTOM CONFIGURATIONS
Supported Encoder Cover Styles
Octagonal & Square Closed-Loop Stepper Covers
Compact rear covers for NEMA 17/23/34 closed-loop stepper motors with side wire-grommet notches.
Inquire Standard Covers → Deep-Drawn Servo Encoder Housings
Extended-depth protective caps accommodating multi-turn absolute encoders, backup batteries, and PCB stacks.
Request Custom Quote → Shielded & Brass-Insert Encoder Covers
Covers featuring pre-embedded brass mounting bushings and internal sealing gasket grooves.
Discuss Custom Tooling →HOW WE GUARANTEE CONSISTENCY
From Impact Compounding to Sealing Flatness Verification
01. Anti-Warpage Polymer Formulation
Balanced fiber and elastomer modification prevents inward wall bowing on deep-drawn box geometries.
02. Precision Venting & Mirror EDM Tooling
Optimized mold venting eliminates weld lines around cable exit cutouts where impact stress concentrates.
03. 100% Mating Rim Flatness & Fit QC
Verified on granite surface plates and master motor housings to guarantee zero-gap perimeter sealing.
02 / MOTOR END CAPS & PROTECTIVE COVERS FAMILY
Explore Other Motor Protective Covers
FAMILY 02 · SIBLING COMPONENT
2.3 Cable Clamp & Wire Tray Covers
100% burr-free mirror-molded wire harness covers for strain relief and short-circuit prevention.
Explore Cable Covers →FAMILY 04 · RELATED COMPONENT
4.4 Waterproof Gaskets & Insulating Films
Elastomer housing seals and precision die-cut dielectric barriers preventing oil/water ingress, electrical arcing, and internal short circuits.
Explore Gaskets & Films →DIRECT ENGINEERING SUPPORT
Need Standard NEMA Encoder Covers or Custom Enclosure Tooling?
Upload or email your 2D/3D component drawing (STEP, IGES, DWG, PDF) or share your motor frame size. 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
Send Your 2D/3D Drawing or Sample Request
Fill out the project specs below or attach your CAD files. Our engineering team responds within 24 business hours.
