Our ejector pin uses hot die steel as material and has strong heat resistance, good quality and high precision; moreover, we adopt nitrogen treatment to improve the hardness and wear resistance of our ejector pin.

Our ejector pin for sale features outstanding corrosion resistance, superior durability, reasonable tolerance and excellent tensile strength. Applicable to the plastic mold, it can be used to separate the plastic products from the mold; the ejector pins made of carbide, such as tungsten steel, can be applied to long and thin holes; also, the ejector pin can be inserted into the mold and play a role of stabilization.

Material
SKH 51-- JIS High Speed Steel (M2)(1.3343) equivalent
SKD 61-- JIS Die Steel (H13)(BH13)(STD61) (1.2344) equivalent
65Mn, SUJ2, HSS, etc

Hardness
58 HRC-62 HRC or depending on materials to be processed

Specifications
Standards: MISIMI / DIN / AISI etc.
Mounting method: flange fixing
Service: OEM is available, and standard ejector pins are in stock
Customization is available
Closest tolerance : shaft: 0mm to -0.01 mm, head: 0mm to- 0.05mm
Polishing: can be close to Ra 0.4, the standard is R0.8
If required, ejector pins with other dimensions, lengths and materials are customizable.

More products can be produced according to DANLY / DME / HASCO / TOHATSU / FIBRO / AGATHON / STRACK / PEDROTTI / RAYMOND / FUTABA / SANKYO / PROGRESSIVE / RABOURDIN, etc.

Application
Our ejector pins are used to eject completed parts from die moulds. They are commonly used in the plastics industry, automotive industry, medical industry, etc. The ejector pin in blade shape is used when there is only a small surface area on the finished part. The ejector pins are also known as knockout pins or KO pins. When the mould is opened, the ejector pins extend into the mould's cavity, push the completed part out and then retract, allowing the mould to close and be refilled.

The ejector pin's lifespan and durability will be enhanced if being correctly chosen for different application. The through hardened ejector pin is good all-purpose steel pin that has been heat-treated to have uniform hardness through its diameter. This ejector pin is often used for injection molding of plastics; also, it can be used in cool molding environment with the temperature below 200℃.

The case hardened ejector pin is nitrided pin that is suitable for die casting; it can be drilled or tapped. This durable ejector pin can be used under the temperature above 200℃. When compared with the through hardened ejector pin, this case hardened ejector pin can not only chip, but also have a longer lifespan under higher temperature.

The blackened or oxidated ejector pin is designed for working environments under extremely high temperature. Having a self-lubricating surface coating, this ejector pin can be used under the high temperature ranging from about 600℃-1,000℃.

Our ejector pin can be further enhanced by our TiN/TiCN/TiAIN coating and other coatings, which can not only protect the ejector pin but also make them more durable. These coatings can reduce the friction and make the ejector pin become more wear resistant and the ejection of the completed part more consistent.

Further Information

Packing and Delivery

Main products
Guide pillars, Guide bushings, Guide post set, Ball cages
Mold ejector pins, Ejector sleeves
Oiless bush, Bronze wear plate
Punch Pin, Die Button, Ball-lock Punch, Punch Retainer.