Humanoid Robot Joint Angled Dual Flange 45 Degree 6061 Aluminum 0.01mm Face Angle
Angled Dual Flange Joint
,45 Degree Flange Transition
,Robot Offset Joint Body
An Angle Error Is a Lever
When two flange faces are parallel, a small angular error cancels out. When they sit at 45 degrees, the same error is multiplied by the distance to the tool. One hundredth of a degree across a 300 mm forearm moves the wrist by roughly half a millimetre, and no amount of calibration downstream can put that back.
So this part is not two flanges machined separately and bolted together through a block. Both flange faces, both pilot spigots and the transition body are cut in one 5-axis clamping sequence, with the angle probed on the machine before the faces are finished. The angle is a measured feature, not an assumption from the CAM file.
How the Angled Body Is Machined
Ten stages. The angle is probed and corrected at stage 6, before either face is finished, which is what separates a machined angle from an assembled one.
Precision Capability
| Characteristic | Held To | Verification |
|---|---|---|
| Included angle between faces | 45° ±0.02° | On-machine probe + CMM |
| Flange face flatness | 0.01 mm | CMM, mapped per face |
| Flange centre intersection | 0.02 mm | CMM, both axes |
| Pilot spigot to face squareness | 0.01 mm | CMM, spigot as datum |
| Dowel hole position | 0.01 mm | CMM, best fit |
| Bolt circle position | 0.02 mm | CMM, full pattern |
| Wall thickness at junction | ±0.15 mm | Ultrasonic gauge, section check |
| Flange face finish | Ra 0.8 µm | Roughness tester, per batch |
Custom Angled Joints
Angles are cut to your kinematic layout, not limited to 45 degrees.
- Included angle from 15° to 90°, or a compound angle on two axes
- Flange diameter 25-200 mm, bolt circles 4 to 24 holes, spigot diameters to drawing
- Materials: 6061-T6, 7075-T6, 6082-T6, 2024-T351, 304/316L stainless on request
- Configurations: angled dual flange, flange to clevis, flange to tube socket, offset body, elbow housing with bearing seat
- Features: internal cable bore, connector window, dowel pairs, weight-relief pockets, motor mounting pads, sensor pockets
- Treatments: clear, black or hard anodize with spigots and dowel holes masked; chromate on request
- Input formats: STEP, IGES, X_T, DXF, 2D drawing with GD&T, or a sample for scanning and rebuild
Confidentiality
- Mutual NDA signed before drawings, models, scans or samples are exchanged
- Files held on a restricted local server, access limited to the assigned engineer and programmer
- Quotations, CMM sheets and shipping labels carry an internal project code, not your product name
- No photograph, sample or reference of your joint is released without written approval
- Programmes, probe routines and fixtures built for your job remain your property
- Files and backups deleted at project close on request
The Plant
Dongguan Changxinda Precision Technology Co., Ltd has machined custom parts since 2008. The floor runs 4-axis and 5-axis machining centres with on-machine probing, turn-mill combination lathes, CNC lathes and milling machines, supported by an ISO 9001:2015 quality system and an in-house CMM room. More than 200 customers in medical equipment, robotics, automotive, aerospace, automation, laser, LED, lithium battery and precision instruments are supplied from this plant, and 50-60% of output is exported. Multi-angle flange work and probe-compensated machining are everyday jobs here.
Delivery
| Stage | Lead Time | Included |
|---|---|---|
| Quote and DFM | Within 24 hours | Angle feasibility, wall advice, cycle estimate |
| Prototype 1-10 pcs | 3-7 days | Angle and flatness record, CMM report, FAI |
| Batch 10-100 pcs | 7-14 days | Per-lot angle record, weekly progress report |
| Series 100+ pcs | 14-30 days | Staged shipments against your build plan |
- Capacity around 10,000 pieces per month for this joint family
- Repeat orders keep the same programme and probe routine, so the angle stays inside tolerance batch after batch
- Each part number allocated across two machining centres to protect your date
- Express, air and sea freight; EXW, FOB or CIF terms; face protection film and rigid separators in the carton
- Rush capacity for line-down situations, quoted with a date we can hold
Key Features
- Both flange faces and spigots finished in one 5-axis clamping
- Included angle probed on the machine and compensated before finishing
- Face flatness 0.01 mm, spigot squareness 0.01 mm
- Flange centre intersection held to 0.02 mm
- Dowel holes reamed on the spigot datum, 0.01 mm position
- Cable bore and connector window cut at multi-angle orientations
- Anodize with spigots and dowel holes masked
- NDA-protected handling and project-code documentation
Typical Applications
- Humanoid robot elbow and wrist offset joints
- Angled arm segment transitions
- Cobot elbow housings with tool offset
- End effector mounts at an approach angle
- Camera and sensor heads on angled arms
- Exoskeleton joint bodies
- Gantry and linear axis angled transitions
- Retrofit adapters between mixed robot geometry
FAQ
Q: Can the angle be something other than 45 degrees?
A: Yes. Anything from 15 to 90 degrees, including compound angles on two axes. Send the model and we will confirm reachability before quoting.
Q: How is the angle verified?
A: Probed on the machine before finishing, then measured on the CMM across both faces. The record ships with the parts.
Q: Will you sign an NDA before we share the arm drawing?
A: A mutual NDA is signed first, covering drawings, models, scans and samples.
Q: Can you keep several angled bodies matched to one another?
A: Yes. Bodies that form a matched chain are machined from the same programme with the angle measured against a common datum, and serials are recorded as a set.
Q: What is the minimum order?
A: One piece, with no tooling charge and no programming fee.
Q: Can the body carry a bearing seat as well?
A: Yes. Bearing seats are bored in the same clamping as the faces, so the seat stays square to the flange rather than being added in a second operation.
Q: What do you need to quote?
A: Drawing or model, included angle, flange and bolt circle sizes, offset distance, quantity, coating and target date. Quote and DFM notes return within 24 hours.
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