Planet Carrier Pin Bore Array Precision
Planet carrier pin bore arrays are machined on MAZAK mill-turn centers in single-setup C-axis indexed drilling programs — all pin bores drilled and reamed from one spindle datum.
Custom
Planetary Gearbox
Custom Planetary Gearbox made to your drawing. Review journal diameters, runout and drive interfaces, material, finishing and inspection requirements before production.
IATF 16949 & AS9100D quality systems
Material and inspection scope reviewed with your drawing
Prototype and repeat-production enquiries
Finishing and documentation agreed with the order
DFMDrawing & process review
QCAgreed inspection plan
Planetary Gearbox: Product Overview
The engineering advantage of planetary over parallel-shaft arrangements derives from load sharing: in a three-planet system, each sun-to-planet and planet-to-ring mesh carries only 33% of total torque at every planet, reducing Hertz contact stress and extending gear fatigue life by 3.7× by the cube law of gear fatigue.
- Planet carrier pin bore array as primary quality disciplineAgree critical-feature checks, measuring methods and inspection records with your drawing.
- Ring gear internal tooth form in hardened material as standard practiceCNCPioneer's ring gear wire EDM programs machine involute internal tooth forms in through-hardened GCr15 HRC 62–65 as standard production.
- Sun gear shaft concentricity as a load distribution disciplinePlan support and setup around critical diameters, datums and mating interfaces.
- Complete planetary gearbox component set from one supplierA single-stage planetary gearbox contains 8–20 precision-machined components.
Why CNCPioneer for Planetary Gearbox?
Coordinate geometry, material, finishing and inspection around the part's intended function.
Ring Gear Wire EDM in Hardened Material
Ring gear internal involute tooth forms in through-hardened GCr15 HRC 62–65 are standard production at CNCPioneer — not a special process for exceptional cases.
Sun Gear Shaft Concentricity Discipline
Sun gear shaft concentricity to bearing journals governs whether the sun gear orbits concentrically or precesses eccentrically — eccentricity produces once-per-revolution transmission error mathematically indistinguishable from pin bore position error .
Complete Component Set From One Supplier
A single-stage planetary gearbox contains 8–20 precision-machined components.
QDD Actuator Planetary Engineering Depth
Quasi-direct-drive (QDD) robot joint actuators at low ratios (3:1–16:1) present specific challenges: high input speeds (1,000–8,000 RPM), impact tolerance from robot foot contact, and minimum backlash for force-controlled manipulation .
Shaft and Housing Interface Review
Identify journal diameters, bearing fits, runout datums and drive interfaces so the machined components can be reviewed against the gearbox assembly.
Planetary Gearbox We Manufacture
Explore representative configurations and share your drawing for a product-specific review.
Planet Carrier Bodies
Planet carriers locate the planet gear pin bores — structural bodies whose dimensional accuracy governs all planetary load distribution, gear life, and transmission error.
Ring Gears
Ring gear housings with internal involute tooth profiles machined in through-hardened GCr15 HRC 62–65 by wire EDM as standard production.
Sun Gear Shafts & Blanks
Sun gear shafts are the input member of the planetary system — components where gear blank concentricity, bearing journal accuracy, and high-speed dynamic balance determine transmission quality.
Planet Gear Bodies & Shafts
Planet gears mesh simultaneously with sun and ring gears — bodies where external tooth form and pin bore concentricity govern load path quality at each planet position.
Output Flange Integration Elements
Output flange integration elements transfer planetary gearbox output torque to the robot structural link — components requiring simultaneous bolt pattern accuracy and bearing seat precision.
Needle Roller Bearing Race Elements
Needle roller bearing race elements for planet gear support — critical components where inner race surface hardness, roundness, and surface finish govern contact fatigue life at planet gear positions.
Industries & Applications
Match the component to its operating environment, assembly interfaces and documentation requirements.
Humanoid Robot OEMs
Planetary Gearbox for robot joints, actuators and mechanical assemblies, with material and inspection requirements confirmed for the application.
Collaborative Robot
Planetary Gearbox for robot joints, actuators and mechanical assemblies, with material and inspection requirements confirmed for the application.
Industrial Robot
Planetary Gearbox for robot joints, actuators and mechanical assemblies, with material and inspection requirements confirmed for the application.
Servo Drive & Mobile Robot
Planetary Gearbox for robot joints, actuators and mechanical assemblies, with material and inspection requirements confirmed for the application.
Explore machining capabilities, material options and quality support for robotics components.
Explore robotics machiningMaterials
Materials for Planetary Gearbox
Confirm the exact grade, delivery condition and finish compatibility with your drawing.
Confirm grade & condition
GCr15 Bearing Steel HRC 62
Confirm the exact material grade, condition, heat-treatment requirements and certificates against the approved drawing.
Planet Gears & Carrier Bodies
20CrMnTi Case HRC 60
The dominant planet gear body and planet carrier body material — case-carburized and hardened 20CrMnTi provides a hard tooth flank surface (HRC 60–62) for high contact fatigue strength with a tough, impact-resistant case-hardened core.
Structural Carrier Housings
42CrMo4 Through-Hardened HRC 28
Confirm the exact material grade, condition, heat-treatment requirements and certificates against the approved drawing.
Sun Gear Shafts & Output Flanges
17-4PH H900 HRC 44
The preferred sun gear shaft and output flange material — 17-4PH H900 at HRC 44–47 provides 1,310 MPa yield strength at a hardness machinable to ±0.003mm sun gear blank concentricity without post-machining grinding operations.
Weight-Critical QDD Programs
Aluminum 7075-T6
Lightweight planet carrier body and output flange material for mass-critical QDD actuator programs — distal robot joints (wrist, elbow) where actuator mass multiplies kinematic loads on proximal joints.
Corrosion-Critical & Specialty
316L Stainless & PEEK
Stainless steel options for corrosion-resistant components. Confirm the grade, delivery condition, surface finish and cleaning requirements.
Finish selection
Surface Treatments for Planetary Gearbox
Select the finish around the specified material, functional surfaces and service conditions. Confirm process details and acceptance requirements with your drawing.
Finish selection
Wire EDM Ring Gear Internal Tooth Flanks
Ring gear internal tooth flank surface finish Ra 0.4μm achieved by two-pass wire EDM skim cuts in through-hardened GCr15 HRC 62–65 — the standard ring gear production process at CNCPioneer.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Finish selection
Gear-Ground Sun & Planet Tooth Flanks
Sun gear and planet gear external tooth flank surface finish Ra 0.4–0.8μm from precision gear grinding after case hardening — achieving DIN 3962 Grade 5–6 profile accuracy simultaneously with surface quality.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Finish selection
Bearing Journal Surfaces
Review bearing journal surfaces against the material, functional surfaces and intended service conditions.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Production Capacity
Machining resources for drawing review, prototypes and repeat-production programs.
Mill-turnCombined turning & milling
CNCPrototype & batch machining
Inspection & documentation
Quality Control for Planetary Gearbox
Review material identity, machining datums, functional dimensions and production records for your component.
IATF 16949AS9100D
To drawingCritical dimensions
As agreedInspection scope
Final tolerances, inspection coverage and acceptance criteria are confirmed against your drawing, material and geometry.
Material Verification
- Check
- Specified grade, material condition and lot identity.
- Verify
- Material certificates and agreed identification checks.
- Records
- Material certificates and required traceability records.
Machining Process Control
- Check
- Journal diameters, runout and drive interfaces.
- Verify
- Drawing datums, setup planning and in-process inspection.
- Records
- Agreed critical-feature and process inspection records.
Dimensional Inspection
- Check
- Functional dimensions, mating features and surface condition.
- Verify
- Suitable measuring equipment and drawing-specific gauges.
- Records
- Dimensional reports and specified finish results.
Production Documentation
- Check
- First-piece approval, production records and delivery requirements.
- Verify
- The inspection plan and customer approval process.
- Records
- Agreed document pack, including PPAP or FAIR when required.
Agree Your Quality Document Pack
Confirm the certificates, inspection reports and production records needed for your order when sharing your drawing.
Planetary Gearbox FAQ
Which Planetary Gearbox designs can you manufacture?
The product range includes Planet Carrier Bodies, Ring Gears, Sun Gear Shafts & Blanks. Custom geometry is reviewed against the approved drawing.
- Include the mating interfaces, critical datums and expected order quantity.
Which materials can I specify?
Material options include GCr15 Bearing Steel HRC 62, 20CrMnTi Case HRC 60, 42CrMo4 Through-Hardened HRC 28. The exact grade and condition should be confirmed for your application.
- Include material certificate, finish and any restricted-substance requirements with your enquiry.
What should I include in the drawing?
Define journal diameters, runout and drive interfaces, together with datums, tolerances and required surface condition.
- Include a 2D drawing and 3D model where available.
- Identify the dimensions that affect assembly or function.
What finishing and inspection records can be requested?
Finishing options include wire edm ring gear internal tooth flanks, gear-ground sun & planet tooth flanks, bearing journal surfaces. Applicability is reviewed against the specified material and geometry.
- Agree material certificates, dimensional reports and any PPAP or FAIR requirements with the order.
How are pricing and lead time confirmed?
Pricing and delivery are confirmed after reviewing the drawing, material availability, quantity, machining route, finishing and inspection scope.
- Prototype and repeat-production schedules are quoted for the specific order.
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Get a Quote for Planetary Gearbox
Share your drawing or 3D model, material, critical dimensions, finish and order quantity. We’ll review the machining route, inspection scope and delivery requirements.
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