Product Category
Al 7075 · -45% Weight · ≤0.005mm Conc. · Type III HA
UAC / 001 — 008
Lightweight CNC Machined
UAV Arm Connectors
Custom CNC machined UAV arm connectors — Al 7075 anodized, weight-optimised hollow sections, interface flatness ≤ 0.01 mm, motor mount concentricity ≤ 0.005 mm. For multi-rotor industrial, agricultural, and inspection UAVs.
Al 7075
Hard Anodized
≤0.005mm
Motor Conc.
−45%
vs Solid
PART DWG · UAC-000 ARM HUB · Al 7075-T6 HARD ANODIZED
ISO 9001 · MOQ 10 PCS
4-Arm Hub Pattern
Motor Mount Ø19
Agri · Inspection · Delivery · Defence · Racing · Mapping
Use Cases
Al 7075 · 6061 · 2024 · Ti Gr5 · CF Hybrid
Materials
48hr Quote · 7-Day Proto
Service
Al 7075
Material Standard
hard anodized
hard anodized
≤0.005mm
Motor Mount Conc.
propeller shaft accuracy
propeller shaft accuracy
−45%
Weight vs Solid
pocket-milled hollow
pocket-milled hollow
7 Days
Fastest Delivery
prototype orders
prototype orders
Why It's Difficult
UAV Arm Connector Challenges
Arm connectors must be light enough to maximise flight time yet stiff enough to resist motor vibration and arm bending — while holding motor mount concentricity for propeller balance.
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Weight Optimisation
Every gram of arm connector weight reduces payload or flight time. HXC pocket-mills all non-structural material, reducing weight by 40–50% vs solid while maintaining arm bending stiffness at motor attachment points.
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Motor Mount Concentricity
The propeller shaft must be concentric with the motor mount bore to ≤ 0.005 mm. Eccentric motor mounts create propeller vibration — reducing battery life and sensor accuracy.
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Vibration Resistance
Motor vibration is transmitted through the arm connector to the frame and payload. We design fillets and rib geometry to avoid resonance at typical motor RPM ranges (5,000–20,000 RPM).
Our Work
Request Similar Part →
UAV Arm Connectors We've Made
Real CNC machined UAV arm connector projects — CMM verified.
Capabilities & Tolerances
What We Can Deliver
Typical specifications for this product type. Confirm exact requirements at enquiry.
| Motor mount conc. | ≤ 0.005 mm |
| Interface flatness | ≤ 0.01 mm |
| Bolt circle dia. | Ø19, Ø16, Ø25, custom |
| Weight reduction | 40–50% vs solid |
| Surface treatment | Type II / III anodize |
| Min wall thickness | 2 mm (load zones) |
| Materials | Al 7075-T6, Al 6061, Ti Gr5, Al 2024 |
| Inserts available | Helicoil, press-fit bushing |
| MOQ | 10 pcs (prototype run) |
| Lead time (proto) | 7–10 days |
| Lead time (small batch) | 10–16 days |
| Lead time (production) | 14–22 days |
Industries
UAV Arm Connectors Applications
Agricultural UAV
Arm connectors for spraying drones, spreading UAVs, and crop-monitoring platforms.
Inspection & Survey UAV
Arm connectors for powerline inspection, building survey, and pipeline monitoring UAVs.
Defence & Tactical UAV
High-strength arm connectors for tactical surveillance and defence unmanned systems.
Heavy Lift UAV
Reinforced arm connectors for cargo delivery and heavy-lift multi-rotor platforms.
Racing & FPV Drones
Ultra-lightweight arm hubs for FPV racing and performance drone builds.
Mapping & Photogrammetry
Vibration-damped arm connectors for photogrammetry and LiDAR mapping UAVs.
How It Works
From Drawing to Finished Part
Upload your 2D/3D file — receive DFM feedback, quote, and confirmed lead time within 48 hours.
01
Upload Drawing
STEP, DXF, PDF or sketch. 2D + 3D preferred.
02
DFM Review & Quote
Free DFM feedback + material, lead time, and cost — within 48 hours.
03
CNC Machining & QC
5-axis CNC, CMM inspection, full dimensional report.
04
Ship Worldwide
DHL / FedEx / sea freight. Inspection report enclosed.
Reviews
Trusted by Engineers Worldwide
★★★★★
"The CMM report matched our incoming inspection perfectly. Every critical dimension was within spec on the first article. Lead time exactly as quoted."
AK
Alex K.
Mechanical Engineer · Germany
★★★★★
"HXC's DFM review caught a tolerance stack issue before we committed to production. The finished parts were perfect and batch consistency was excellent."
SL
Sophie L.
Design Engineer · France
★★★★★
"We've sourced over 30 part numbers from HXC across three years. Quality is consistent, lead times are reliable, and the engineering team is always responsive."
JT
James T.
Senior Buyer · UK
FAQ
UAV Arm Connectors — FAQ
Common questions from engineers and procurement teams — answered by our manufacturing team.
Al 7075-T6 hard anodized is the standard — density 2.81 g/cm³, yield strength 503 MPa, excellent fatigue resistance, and anodizable for environmental protection. For defence and special-mission UAVs: Ti Grade 5 (4.43 g/cm³, 880 MPa yield, best specific strength). Carbon fibre hybrid designs are also available.
A solid Al 7075 arm connector of 80 × 40 × 20 mm weighs approximately 172 g. A pocket-milled version retaining 2 mm minimum walls at load-bearing zones weighs approximately 85–95 g — 45–50% reduction — while retaining 90%+ of the bending stiffness critical for motor mount accuracy.
HXC machines motor mounts for all standard motor flange patterns: 19 mm, 16 mm, 25 mm bolt circles (common multi-rotor standards); custom direct-mount flanges for OEM motors. Motor mount bore, bolt pattern, and face flatness are all verified by CMM.
Every batch uses the same CNC program and CMM inspection program as the first article. Critical dimensions — interface flatness, motor mount concentricity, arm length, and weight — are 100% checked in small batches (<200 pcs) and statistically sampled in large batches. Any out-of-spec parts are quarantined.
Type II anodizing (standard protective): 5–10 µm, multiple colours available. Type III hard anodizing: 15–25 µm, HV 400+ surface hardness, maximum wear and environmental protection — recommended for all UAV arm connectors exposed to impact and abrasion. No dimensional correction needed — pre-anodize allowance applied.
Yes — HXC installs Helicoil thread inserts, press-fit bushings, and locating pins as part of the supply. Assembled connectors are verified by CMM before shipment.
HXC does not perform vibration testing — this is the system integrator's responsibility. However, we can provide: (1) material fatigue data (S-N curves for Al 7075-T6); (2) minimum fillet radius at stress concentration zones; (3) wall thickness at identified vibration nodes. This data supports your FEA model.
Prototype (custom design, first article CMM): 7–10 days. Small production batch (100–500 pcs): 10–16 days. Large production (500–5,000 pcs): 14–22 days.
Get a Quote
Send Your Drawing.
Get a Quote.
Every enquiry includes a DFM review — tolerance feasibility, material confirmation, and process approach confirmed before production starts. MOQ 1 piece.
24hr
Quote Response
MOQ 1
Prototypes OK
ISO
9001:2015
📐
DFM Review on Every Enquiry
Tolerance feasibility, fixturing strategy, and material confirmation. Specific, actionable feedback — not generic pushback.
🎯
First Article Inspection — Standard
FAI report on every new run. Material certs and surface treatment certs included with every shipment.
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Same Process: Prototype to Production
Process plan from your prototype applies to production batches. No re-qualification when you scale.
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3 / 4 / 5-Axis CNC + Turning
Complex structural parts, shafts, housings, and transmission components. Metals and engineering plastics.
ISO 9001:2015
3/4/5-Axis Milling
CNC Turning
CMM Inspection
Global Delivery