#robot hand

That's the project I'm doing for school, it was supposed to be a group project, but I said fuck it, and where other choose simple things, I decided to make a prosthesis of the hardest part of the body cause I'm crazy like that.

It does not have a thumb yet, I need to find a way to do it, the motors inside take too much space.

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What is a dexterous robot hand?

Why CNC machining matters

Robot hand price & cost table

Embodied AI hardware checklist

Why YIXIN Precision

Cost-reduction tips

FAQ

What is a Dexterous Robot Hand?

A dexterous robot hand is an advanced end effector that replicates the grasping versatility of a human hand. Compared with parallel or two-finger grippers, dexterous hands typically integrate higher degrees of freedom (DOF), tendon or gear transmissions, and multi‑modal sensing to manipulate objects of different shapes, weights, and surface properties.

Core capabilities

Multi‑DOF kinematics for precision and adaptive grasps

Force/torque and tactile sensing for feedback control

Low‑friction joints and wear‑resistant linkages

Lightweight structure for speed and energy efficiency

Typical applications

Humanoid service robots and embodied AI research

Medical and surgical robotics manipulators

Industrial assembly and flexible automation

Laboratory handling and field robotics

Why CNC Machining is Critical for Robot Hand Manufacturing

Dexterous hands combine compact geometry with tight tolerances. CNC milling and turning deliver reliable fits for shafts, bushings, and bearing seats, ensuring smooth motion across long duty cycles.

Precision & tolerances

Typical functional features target ±0.01 mm for joint bores, gear centers, and mating faces. 5‑axis strategies minimize re‑clamping error and improve datum consistency.

Material flexibility

Aluminum 6061/7075 – lightweight, good machinability, anodizable

Stainless SUS304/316 – high strength and corrosion resistance

Titanium Ti‑6Al‑4V (TC4) – premium strength‑to‑weight for critical links

Engineering plastics (POM, PA, PEEK) – low friction, electrical isolation

Surface integrity for smooth motion

Fine finishing (Ra ≤ 0.8 μm) on contact faces reduces friction and start‑up torque. Hard‑coat anodizing, passivation, or DLC coatings extend wear life of sliding and meshing components.

Complex geometry with 5‑axis

Finger phalanges, tendon pulleys, and topology‑optimized brackets often require undercuts, compound curves, and deep pockets. 5‑axis CNC consolidates setups, maintains accuracy, and shortens lead time.

Robot Hand Price – Key Drivers & Reference Ranges

Pricing depends on design complexity, material, finishing, and required precision. Use the table to estimate cost impact during early design.Cost FactorImpact on PriceDesign NotesMaterialTitanium > stainless > aluminum > engineering plasticsSelect premium alloys only for high load or thermal stability needs.Degrees of FreedomMore DOF ⇒ more parts, tighter stack‑upsStandardize joint modules to reuse tooling and code.Tolerances±0.01 mm fits cost more than ±0.05 mmApply tight tolerances only where function demands.Surface TreatmentAnodizing, passivation, DLC, polishing add costUse hard‑coat selectively on high‑wear faces.QuantityPrototypes have higher unit cost than batchesBatch to amortize programming and setup time.Lead TimeExpedite services raise pricingFreeze design early to avoid urgent ECOs.

Reference price ranges

Basic end effector (2‑finger): US$300 – US$1,000

Dexterous robot hand (multi‑DOF): US$5,000 – US$20,000+

Tip: Consolidate multi‑part finger segments into monolithic 5‑axis parts where possible—often lowers tolerance stack‑ups and assembly time.

Embodied AI Hardware Checklist

Embodied AI succeeds when hardware and control models co‑evolve. Use this checklist to ensure your robot hand design is manufacturable and field‑ready.

Geometry: Provide STEP/IGES and fully constrained drawings with GD&T.

Materials: Annotate heat‑treat, temper, and grain direction where relevant.

Bearings & joints: Specify fits (e.g., H7/g6) and retention methods.

Cables/tendons: Route with generous radii; protect with wear sleeves.

Surface finish: Define Ra/Rz on functional faces; call out coating specs.

Assembly: Design for tool access; avoid hidden fasteners.

Testing: Include torque, backlash, and life‑cycle requirements.

Why Choose Shenzhen YIXIN Precision for Robot Hand & End Effector Parts?

Manufacturing strengths

20+ years in precision machining for robotics, medical, aerospace

Advanced 5‑axis CNC & multi‑task turning centers

ISO 13485 / IATF 16949 quality systems

Materials: Aluminum, stainless, titanium (TC4), POM, PEEK

Prototype to small‑batch with rapid lead times

One‑stop: machining → surface treatment → assembly

Representative results

Humanoid finger linkages with ±0.01 mm positional accuracy

Titanium surgical components with polished bearing bores

Industrial end effectors with hard‑coat anodized contact faces

Get a DFM review & quoteView machining samples

How to Reduce CNC Machining Cost Without Sacrificing Performance

Design for manufacturability: avoid tiny deep pockets; standardize radii to tool sizes (e.g., R2, R3).

Prioritize tolerances: reserve ±0.01 mm features for true functional faces.

Use standard stock: select plate and bar sizes available in your region.

Consolidate setups: leverage 5‑axis to machine more in one clamp.

Batch orders: reduce unit price by amortizing CAM and setup.

Early supplier engagement: send models early for DFM feedback.

FAQ

What makes an end effector different from a dexterous hand?

“End effector” is the general term for any tool at the robot wrist. A dexterous hand is a specialized end effector offering human‑like grasp diversity and fine manipulation.

Can plastic parts meet precision needs?

Yes. POM and PEEK provide stable dimensions and low friction. For high loads or temperature swings, consider aluminum or titanium for critical pieces.

How fast can prototypes be delivered?

Lead time depends on geometry and finishing. YIXIN’s rapid cell prioritizes robotics R&D with compressed setup cycles while maintaining quality controls.

Sample Part Types We Machine

Finger phalanges, tendon pulleys, gearboxes, and adapter plates

Joint housings, knuckles, bearing carriers, and sensor brackets

Lightweight topology‑optimized structural frames

Start Your Project

Share your STEP files and 2D drawings to receive a free manufacturability review and a fast quote tailored to your robot hand price targets.

Email: [email protected]

Preferred files: STEP/IGES + PDF with GD&T