6806 Decoder Bearing
The 6806 Decoder Bearing is a precision-engineered thin-section deep groove ball bearing specifically developed for rotary decoder and encoder mechanisms in automotive instrumentation, industrial control systems, and precision electronic equipment. Supplied by MTWB (Mighty Way Industrial Limited) , this bearing delivers the ultra-low rotational resistance, excellent running accuracy, and stable signal transmission reliability required by modern decoder assemblies.
●Bearing designation: 6806 / 6806ZZ / 6806-2RS / 6806LLB
●Series: 6800 thin-section deep groove ball bearing series
●Brand: MTWB / Custom OEM
Parameter Value
Bore Diameter (d): 30 mm
Outer Diameter (D): 42 mm
Width (B): 7 mm
Chamfer (r min.): 0.3–0.5 mm
Dynamic Load Rating (Cr): 4.55–4.7 kN
Static Load Rating (Cor): 3.65–3.8 kN
Limiting Speed (Grease, ZZ/2RS): 15,000 rpm
Limiting Speed (Oil, Open): 18,000 rpm
Weight: Approx. 0.026 kg
Precision Class: P0 / P6 / P5 (ABEC 1/3/5 equivalent)
Cage Material: Steel / Brass / Nylon (customizable)
Seal Options: Open / ZZ (Metal Shield) / 2RS (Rubber Seal) / LLB (Non-Contact Seal)
Material: GCr15 (Standard) / Stainless Steel / Hybrid Ceramic (optional)
Noise/Vibration Grade: Z1–Z3 / V1–V3 (application-dependent)
The 6806 bearing features a thin-section design with a fixed cross-section that does not increase as the bore diameter increases, making it ideal for compact rotary mechanisms.Standard configurations include open, ZZ metal-shielded, and 2RS rubber-sealed variants, with the LLB non-contact seal available for low-torque applications.
●Thin-Section Architecture — Small-diameter steel balls and optimized raceway geometry significantly reduce friction, improve rigidity, and deliver good rotational accuracy for compact, lightweight rotating mechanisms.
●Low Starting & Running Torque — Critical for decoder applications where the bearing must respond to minute angular inputs without introducing hysteresis or signal lag.
●High Rotational Accuracy — Precision-ground raceways and matched ball sets ensure smooth, consistent rotation, which is essential for maintaining decoder output linearity.
●Multiple Sealing Options — Available in open, ZZ, 2RS, and LLB configurations to suit different contamination and torque requirements.
●Customizable Noise & Vibration Grades — Can be produced to Z1/Z2/Z3 sound ratings and V1/V2/V3 vibration ratings based on application needs.
The 6806 Decoder Bearing is designed for and used in:
●Rotary Decoders & Encoders — Position feedback devices in servo systems, robotics, and CNC machinery
●Automotive Instrumentation — Steering angle sensors, throttle position sensors, and dashboard indicator mechanisms
●Industrial Control Systems — Potentiometer shafts, control knobs, and precision adjustment mechanisms
●Medical Devices — Dial mechanisms and precision adjustment assemblies
●Consumer Electronics — Volume/control knobs in high-end audio equipment and precision tuning mechanisms
●Aerospace & Defense — Cockpit control panels and precision indicating instruments (custom specifications available)
Decoder Bearing vs. Power Hand Tool Bearing: Power hand tool bearings are engineered for survival in high-vibration, high-impact environments such as angle grinders and impact drivers. They typically use a Z1/V1 standard industrial grade, which prioritizes rugged performance over acoustic refinement.
The decoder bearing, by contrast, is optimized for precise angular transmission — it must maintain consistent torque characteristics across its full rotation to avoid signal distortion. This means tighter manufacturing tolerances on raceway roundness and ball diameter variation, even though the load-carrying capacity may be similar.
Decoder Bearing vs. Low Noise EMQ Bearing: EMQ (Electric Motor Quality) bearings are rated primarily by their acoustic performance — Z2 and Z3 grades achieve sound pressure levels 3–5 dB lower than Z1, and are targeted at home appliances, HVAC, and ceiling fans where silence is the selling point.While decoder bearings also benefit from low noise, their primary performance requirement is not silence but rotational fidelity — the ability to translate minute shaft movements into precise electrical signals. An EMQ bearing optimized purely for low dB may not deliver the torque consistency and angular accuracy that a decoder application demands.
Shared characteristics and the MTWB difference: All three types share the same fundamental 6806 thin-section DGBB architecture — 30 mm bore, 42 mm OD, 7 mm width, ~0.026 kg. What differentiates MTWB's 6806 Decoder Bearing is the application-driven customization applied to the internal geometry, lubrication, and quality control regime.
MTWB (Mighty Way Industrial Limited) is not a catalog bearing reseller — it is an engineering-driven bearing manufacturer with over 18 years of experience in precision bearing development and 51 active patents, including 10 product innovation patents.The company bridges Hong Kong quality management standards with cost-efficient manufacturing resources in mainland China, operating three production facilities across Jiangsu and Zhejiang provinces.
1. Application-First Engineering Approach
MTWB's engineering team begins every project by understanding the customer's actual working conditions — load profile, speed, temperature range, contamination exposure, and performance expectations — rather than simply recommending an existing model from a catalog.For decoder bearing applications, this means tailoring internal clearance, ball grade, raceway finish, and lubrication to match the specific signal fidelity requirements of the customer's device.
2. Full-Spectrum Customization Capability
MTWB offers customized bearings ranging from miniature to medium and large sizes, including:
●Special dimension bearings
●Super precision miniature bearings
●Extra low noise small DGBB
●High-speed miniature bearings
●Stainless steel and ceramic bearings
●Custom seals, shields, and lubrication systems
●Material options: GCr15 (standard), martensitic stainless steel SV30 (X30CrMoN15-1) for corrosion resistance, hybrid ceramic, or full ceramic
●Lubrication engineering: Low-torque greases, low-noise greases with finer filtration, or specialized lubricants for extreme temperature ranges
●Seal customization: Open, ZZ, 2RS, LLB, or custom seal profiles optimized for the specific torque and contamination requirements
Tolerance optimization: P0 through P5 precision classes, with selective fitting for matched bearing sets
3. Short Lead-Time Custom Development
MTWB's customization workflow — from design and technical drawing through prototype making and small-batch production — is significantly faster than that of large international bearing brands.
This agility is critical for OEM customers developing new decoder products or seeking to replace an existing bearing with an improved specification.
4. Quality Control at Every Stage
MTWB exercises stringent quality control from raw material steel tubes to finished bearings.
The company's Hong Kong-based quality management system ensures consistency across production runs, and factory audits are available to regular OEM customers.
5. Proven Track Record
MTWB supports 100+ OEM customers worldwide, with accumulated experience across aviation, automotive, medical, metallurgy, industrial pumps, robotics, and precision electronic equipment applications.The 6806 Decoder Bearing benefits from this cross-industry engineering knowledge base.
October 14,2026
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