Ejector Rods (KO Rods)
Transfer knockout force from the injection molding machine to the ejector plate — available in standard fixed-length and adjustable configurations.
Ejector Rods (KO Rods) Products
Ejector Rods (KO Rods) — Type A
S45C Steel | Various lengths | Threaded ends
Ejector Rods (KO Rods) — Type B
S45C Steel | Various lengths | Threaded ends
Ejector Rods (KO Rods) — Type C
S45C Steel | Various lengths | Threaded ends
Ejector Rods (KO Rods) — Type D
S45C Steel | Various lengths | Threaded ends
Ejector Rods (KO Rods) — Type E
S45C Steel | Various lengths | Threaded ends
Ejector Rods (KO Rods) — Type F
S45C Steel | Various lengths | Threaded ends
Standard vs Adjustable Ejector Rods
| Feature | Standard (Fixed Length) | Adjustable |
|---|---|---|
| Length | Cut to exact size | ±10 mm adjustment range |
| Precision | ±0.1 mm | ±0.5 mm (depends on lock tightness) |
| Best For | Production molds | Prototype and trial molds |
Deep dive: For a detailed comparison, read Standard vs Adjustable Ejector Rods — When to Use Each Type.
About Ejector Rods (KO Rods)
Ejector rods (KO rods) transmit the knockout force from the injection molding machine's hydraulic KO mechanism to the mold's ejector plate. They bridge the gap between the machine KO bar and the ejector plate, ensuring centered, consistent ejection force.
Application Scenarios
Standard Production Molds
Production molds need consistent KO force transfer for repeatable ejection across millions of cycles.
Why it fits: Fixed-length S45C ejector rods provide reliable, consistent force transfer with no adjustment drift.
Frequently Asked Questions
What is the difference between standard and adjustable ejector rods?+
How do I determine the correct KO rod length?+
What thread sizes are available for ejector rod connections?+
Engineering Resources
Need Custom Ejector Rods (KO Rods)?
Precision ejector rods (ko rods) manufactured to JIS and DIN standards. Custom dimensions available. MOQ 1 piece.