Ejector Sleeves

Ejector Sleeves

Engineered for perfect concentricity, flawless rotational alignment, and tailored injection molding solutions. Our custom ejector sleeves for plastic molds are manufactured using high-speed internal and external grinding machinery to align with strict industrial component catalogs. We specialize in producing custom, non-standard ejector sleeves engineered precisely from your technical drawings out of premium, high-nitriding tool steels. Backed by rigorous quality control, true concentric tolerances between inner and outer walls, and rapid turnaround schedules, our machined components prevent binding and guarantee continuous part ejection in complex mold mechanisms worldwide.

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Ultra-Precise Concentricity & Inner-Hole Grinding
  • True Wall Uniformity: Utilizing high-end internal honing and precision cylindrical grinding to guarantee that inner and outer diameters share an absolute concentric centerline, preventing pin binding or seizing.
  • Advanced Nitrided Performance: Formulated from high-durability SKD61 steel with deep gas nitriding, maintaining structural integrity across extreme cyclical pressures and preventing premature inner-bore wear.
  • Reduced Friction Interfaces: Super-smooth inner surface roughness scores ensure effortless linear glide when paired with mating center core pins, cutting friction-induced heat build-up.
Customization & Non-Standard OEM Expertise
  • Tailored to Your Drawings: We offer comprehensive OEM/ODM manufacturing flexibility, delivering high-precision ejector sleeves processed exactly to your provided 2D blueprints (PDF/DXF) and 3D CAD models (STEP/IGS).
  • Specialized Non-Standard Geometries: We excel at processing extra-long sleeve bodies, complex multi-stepped configurations, thin-walled custom inner diameters, and specific oil-groove additions that generic distributors cannot accommodate.
  • Optimized Production Scheduling: Streamlined factory processes ensure fast lead times and rapid delivery parameters, securing your mold assembly schedules against sudden component failures.
Technical Specifications
  • Processing Configurations: Precision Lathe Machining, Internal Honing, Concentric O.D./I.D. Grinding.
  • Achievable Tolerances: Inner Diameter (I.D.) tolerance up to +0.005/+0.010mm; Outer Diameter (O.D.) up to -0.005/-0.012mm.
  • Surface Finish Integrity: Inner bore roughness maintained down to Ra 0.4μm for maximum service lifespan.

 

We are committed to helping industrial buyers, localized workshop managers, and emerging product designers grow by offering flexible purchasing with absolutely no minimum order quantity (MOQ) pressures. Whether you require a single replacement sleeve assembly or a low-volume custom batch run, we deliver premium results with minimal stock burden. Contact our engineering team today to upload your drawings and get started.

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