The knee actuator clevis bracket links the electric cylinder to the knee link and carries unidirectional thrust plus side offset load. Its three features constrain each other:

• Slitting releases stress — an aluminum slit opens 0.01-0.03 mm on both sides; boring before slitting leaves an out-of-round bore. The correct sequence is finish bore, slit, then re-inspect.
• Groove width and pin bore perpendicularity — if the groove bottom is not perpendicular to the pin axis, the pin tilts and the push rod binds at the end of stroke. We machine the groove bottom from the pin bore axis to 0.01 mm perpendicularity.
• Clevis Stiffness — clevis ears splay under thrust; thickening the outer side and adding R4 root fillets is the cheapest and most effective fix.
• Thread concentric with pin bore — the coaxiality between the rod-end locking thread and the pin bore decides whether assembly binds; both are machined in one clamping to 0.02 mm.

Cylinder brand, rod end style and swing angle decide every dimension of a clevis bracket.

• Rod End Interface — internal thread, external thread, rod end bearing or eye fitting, matched to the actual cylinder rod end.
• Pin and bushing — H7 bores matched to the actual pin, or press-fit self-lubricating bushings and rod end bearings.
• Material Selection — aluminum for weight, quenched and tempered 40Cr for wear, 304 for corrosion resistance, with aluminum-steel hybrid structures available.
• Limit and Dust Protection — mechanical limit bosses, dust seal grooves and lubrication holes can be integrated.

The drawings of a complete humanoid robot are often the core competitiveness of the next machine generation. We apply both physical and data isolation on a per-project basis.

• NDA First — mutual NDA and non-circumvention agreement signed before drawings are received.
• Isolated Secure Area — dedicated machines and staff, no photography and no phones inside the area.
• Not displayed — drawings, part photos and customer logos never enter sample cabinets, catalogs, the website or social media.
• Data Isolation — programs and models sit on an access-controlled server, destroyed at project end with a written record.
• Code-named — traveler cards and packaging labels use internal codes instead of customer part numbers.

Dongguan Changxinda Precision Technology Co., Ltd.Founded in 2008, with a team of 90-102 staff, serving 200+ Customers, export share 50-60%, annual sales of USD 10-20 million, ISO 9001:2015 certified.

Slit parts, thin-wall parts and matched pairs are the three families of troublesome parts we make most. What they share is that machine accuracy is not the bottleneck; operation sequence and fixturing strategy are. Explaining this at the quotation stage is the fastest way to work together.

• Reserved Capacity — machine time is locked weekly for volume programs, so rush orders never displace batch schedules.
• Two shifts, six days a week — production runs 07:30-22:00, with weekend shifts added in peak season.
• Buffer Stock — semi-finished stock is held for repeat specifications, cutting repeat order lead time by about 30%.
• Visible Progress — weekly progress sheet plus shop floor photos, tracking number issued at shipment.
• Shipping — samples by express in 3-5 days, volume by air or sea, EXW / FOB Shenzhen / CIF.