ZUFEK
Pin connection and articulation
Dimension the eye hole against the mating pin, the remaining ligament and the available articulation. Show load direction and nearby interference through the movement. A linkage eye and an approved lifting component have different verification requirements; eye shape does not establish a working load.
Review the route before fixing the quotation
For custom eye & articulating bolts, review Hot Heading & Forging, Swiss-Type & CNC Turning, CCD Vision & Dimensional Inspection against the drawing and quantity. Identify which features can be produced in the initial shape and which require a separate setup. A change to a functional shoulder, bore, drive or thread can change the proposed route as well as the inspection effort.
The drawing review should resolve eye or fork geometry; shank transition; assembly motion. Keep material condition and finishing allowance attached to those requirements. Define the acceptance condition for critical features and approve any proposed dimensional change before comparing samples with the original assembly.
From drawing to approved samples
State force direction and intended use. Any lifting application needs an approved load-rated design and agreed verification, not simply an eye-shaped head. Identify the drawing revision, prototype quantity and expected repeat demand. Where the first part is based on an existing sample, separately confirm material and hidden features rather than inferring them from appearance.
The typical sampling lead time, including tooling, is approximately 10–15 days. The schedule is confirmed after drawing review and agreement on the sample specification; material availability, special treatment and inspection requirements can affect the confirmed date. Confirm when the agreed schedule starts in the quotation. Sample approval and repeat-production delivery are separate milestones.