Hirogeru‑kun is a compact and powerful tool for expanding pipes using a press machine.
Its main body is built from high-strength carbon steel and tool steel, treated with a salt bath nitriding process for superior surface hardness and corrosion resistance.
Each expander is crafted from hardened tool steel, delivering exceptional durability and performance even under heavy use.
With interchangeable expanders, Hirogeru‑kun can handle pipe inner diameters from approximately 31 mm to 62.5 mm, making it a versatile solution for a wide range of applications.

Dimensions of Hirogeru-kun

• Height when mold is open (no load): 194.8 mm

• Height at bottom dead center (mold fully pressed): 160.0 mm

• Upper die plate dimensions: Depth 100 mm, Width 100 mm

• Lower die plate dimensions: Depth 125 mm, Width 200 mm

 ●Shipping Schedule
Orders will be processed and shipped within 5–10 business days (excluding weekends and Japanese national holidays). Delivery times will vary depending on your location and the efficiency of your local customs.

To ensure safe and secure international delivery, Hirogeru-kun will be shipped in a durable, TRUNK CARGO-style storage container.

This case is commonly used for storing tools and outdoor gear, and is designed for both strength and convenience.
The available colors are green, gray, and black; however, please note that the color cannot be selected.

These expanders work with Hirogeru‑kun and support a processing length of up to 30 mm. Choose based on your pipe’s outer diameter and wall thickness.

● Minimum Outer Diameter
This refers to the outer diameter of the expander when fully closed.
Please check to ensure your pipe can be inserted properly.

● Maximum Outer Diameter
This is the outer diameter of the expander when it is expanded to its maximum limit using the adjustment mechanism of the main body.

Please note:
The expander does not expand from the minimum to the maximum diameter in a single operation.

Shipping Schedule:
Orders will be processed and shipped within 5–10 business days (excluding weekends and Japanese national holidays). Delivery times will vary depending on your location and the efficiency of your local customs.