Straight Ejector Sleeves are the key components for ejecting parts around core pins in injection molds, widely used in automotive, electronics, and medical industries. Our Straight Ejector Sleeves are precision-manufactured to DIN & JIS standard specifications, offering 19 product series in SKD61 (H13) and SKH51 (M2) steels with full configurability.
  • Material: SKD61 (H13) / SKH51 (M2 Equivalent)
  • Hardness: Surface 900-1100 HV (Nitrided) | Core 42-48 HRC (SKD61) / 58-62 HRC (SKH51)
  • Concentricity: Up to 0.003mm (Grinding Grade)
  • Shaft Diameter (D/P): 2.5mm - 20mm
  • Hole Diameter (V): 0.5mm - 16mm
  • Head Thickness: 4mm(T4) / 6mm(JIS) / 8mm(JIS)
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Straight Ejector Sleeves

Straight ejector sleeves compatible with MISUMI standards. SKD61/H13 nitrided steel and SKH51/M2 high-speed steel options. Fully configurable length, OD, and ID.

Interchangeable with MISUMI StandardsManufactured to the same specifications as global standard brands, offering full interchangeability. 19 product lines covering all standard head types, concentricity grades, and boring methods for drop-in replacement compatibility.

Premium Material OptionsChoose between SKD61 (H13) hot-work steel with nitriding for heat resistance, or SKH51 (M2) high-speed steel for maximum wear resistance. Both materials are vacuum-hardened and precision-ground.

Full ConfigurabilityLength, outer diameter (D/P), and inner diameter (V) are all configurable. No minimum order quantity on standard size ranges. Custom sizes welcome with 2D/3D drawings.

Factory Direct PricingAs the manufacturer, we offer competitive factory-direct pricing with no middleman markup. Every batch comes with material certificates for full traceability.

Need Straight Ejector Sleeves for Your Mold?

Get a competitive quote on standard or custom-sized straight ejector sleeves. We provide material certificates with every batch and ship worldwide.
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Industry Applications

Automotive Industry
Automotive Industry

Reliable ejection for large structural parts and intricate interior trim components in high-cycle production environments.

Consumer Electronics
Consumer Electronics

High-precision sleeves for smartphone housings, connectors, and micro-components requiring tight tolerances.

Medical Devices
Medical Devices

Cleanroom-compatible ejector sleeves for medical disposables, surgical tools, and diagnostic device components.

Packaging
Packaging

Wear-resistant sleeves for high-speed packaging molds running thin-wall containers and closures.

Technical FAQ

Q: What is the difference between straight ejector sleeves and shouldered ejector sleeves?

A: Straight ejector sleeves have a uniform outer diameter along the shaft and are used with a separate center pin, ideal for ejecting parts around core pins. Shouldered (stepped) ejector sleeves have a stepped OD design, providing additional strength at the head and better alignment in specific applications.

Q: What materials are available for straight ejector sleeves?

A: We offer SKD61 (1.2344 / H13) hot-work steel with optional nitriding surface treatment for heat resistance and wear protection, and SKH51 (M2 equivalent) high-speed steel for maximum wear resistance in high-temperature applications.

Q: What concentricity grades do you offer?

A: We offer concentricity grades from 0.003mm (ultra-precision, grinding finish) up to 0.06mm (standard, reaming finish). The choice depends on your mold’s precision requirements and operating conditions.

Q: Can I order custom dimensions?

A: Yes! All our straight ejector sleeves are configurable. Standard size ranges cover D/P 2.5-20mm and V 0.5-16mm. For sizes outside this range, send us your 2D/3D drawings for a custom quote.

Q: What is the typical lead time?

A: Standard sizes ship within 5-7 working days. Custom sizes typically require 10-15 working days depending on complexity and quantity.