Stepped Free Flange-Position Ejector Pins

Yes, with one modification: the ejector plate counterbore must be enlarged or re-machined to accept the free-flange collar diameter, which is typically 2–3mm larger than a standard fixed-head stepped pin. The shaft and tip dimensions are identical to standard stepped pins, so the cavity-side fit is unchanged. The advantage of retrofitting is that multiple pin lengths can be accommodated by a single free-flange pin — reducing inventory requirements. However, the per-pin cost is approximately 40–60% higher than standard fixed-head stepped pins, so the retrofit only makes economic sense for molds requiring frequent length adjustments.

The stepped section (tip diameter) maintains the same tolerance as standard stepped ejector pins: h6 (±0.008mm for ø1–ø6, ±0.009mm for ø6–ø16) for standard grade, and h5 (±0.005mm) for precision grade. The shaft-to-tip concentricity is held within TIR 0.01mm, identical to fixed-head stepped pins. The free-flange mechanism does not affect the tip/shaft precision because the flange is a separate component clamped to the shaft — the shaft and tip are machined as a single piece with the same process as standard stepped pins.

MOQ is 1 piece for all standard catalog configurations, including configurable-length series. Stepped free-flange pins are available in M2 steel (SKH51) with head T=4mm JIS standard. Configurable parameters include tip diameter (ø1.5–ø10mm), shaft diameter (ø3–ø16mm), and overall length (50–250mm in 0.5mm increments). Lead time for MOQ-1 standard items is 3–5 business days. Volume pricing begins at 10+ pieces with 5–10% discount.