James Burn 3:1 Square-Hole Punch Die - 72 Holes (4x4mm), EX610

The James Burn 3:1 square-hole punch die is interchangeable tooling for the James Burn EX610 modular punch. A 3:1 pitch means three holes per inch, the pattern used for twin-loop (double-loop) wire binding up to roughly 9/16 inch diameter, and this die punches a square 4x4mm hole, 72 holes across the sheet. Because the EX610 takes interchangeable dies, a shop can switch between hole patterns by changing the tool rather than buying a separate machine for each binding style.

Square-hole 3:1 tooling is the choice for twin-loop wire jobs that need the clean, squared punch pattern that wire elements seat into. Where round-hole or 2:1 pitch suits coil and larger-diameter wire work, a 3:1 square-hole die matches standard twin-loop wire and the page counts that pitch supports. Mid-State Litho is an authorized James Burn International dealer that supplies, installs, and services the EX610 line and the wire and tooling that run on it.

James Burn EX610 Tooling and Cross-Sell

This die is one tool in the EX610 interchangeable-tooling system. MSL carries a broad set of James Burn punch dies, 2:1 and 3:1, round and square hole, in several hole counts and pitches, so a shop can match the die to the binding style. The dies feed the wire binding machines that close 3:1 wire, and the EX610 also serves coil and comb work through other tooling. Explore the full range through our paper punching, mechanical binding, and coil binding categories.

Why Buy from Mid-State Litho

Mid-State Litho is an authorized James Burn International dealer, family-owned and Michigan-based, serving the Great Lakes since 1984. Our factory-trained technicians service the EX610 and the binding lines that run its tooling, we keep wire and binding supplies moving, and equipment and tooling financing is available. For help matching a die to your wire and page count, see service and support or contact us.

3:1 Square-Hole Punch Die FAQ

What machine does this punch die fit?

The James Burn EX610 modular punch, which uses interchangeable dies.

What does 3:1 square hole mean?

Three holes per inch (the 3:1 pitch) with a square 4x4mm hole pattern, the standard for twin-loop wire binding.

How many holes does it punch?

72 holes at 4x4mm across the sheet.

What is the difference between 3:1 and 2:1 pitch dies?

Pitch sets the wire diameter and page count a job supports. A 3:1 die suits thinner books with smaller-diameter twin-loop wire; a 2:1 die suits thicker books with larger wire.

What is the lead time, and does MSL install it?

The die is built to order. Mid-State Litho is an authorized James Burn dealer and supports installation on the EX610 line.