Chainsaw milling—turning a raw log into beautiful slabs of lumber—is growing rapidly in Australia. But if you try to slab an Ironbark log with your standard firewood chain, you are going to have a bad day. The finish will be rough, the saw will vibrate violently, and you will be exhausted.
The solution is the Ripping Chain.
But what exactly is a ripping chain? Is it a magical different type of metal? Or is it just a standard chain filed differently?
At Alpine Chain Co, we believe in demystifying the tech. Here is the definitive guide to Ripping vs. Crosscut geometry.
The Physics: Cross-Grain vs. With-Grain
To understand the chain, you must understand the wood fibers.
1. Cross-Cutting (Standard Chains)
When you buck a log into firewood, you are cutting across the grain (perpendicular to the fibers).
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The Goal: Sever the fibers.
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The Angle: Standard chains use a top plate angle of 30° or 35°. This sharp angle slices through the fibers like a knife.
2. Ripping (Milling)
When you mill a slab, you are cutting along the grain (parallel to the fibers).
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The Goal: Shave the fibers (like a wood plane).
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The Problem: If you use a 30° standard chain, the sharp angle tries to "grab" and tear long strands of fiber. This causes the saw to jerk (chatter) and leaves a rough, torn surface on your slab.
What Makes a Ripping Chain?
A dedicated Ripping Chain differs from a standard chain in two key ways.
1. The Top Plate Angle (10°)
This is the "secret sauce." A ripping chain is filed at a shallow 10° angle (sometimes even 5° or 0°), rather than the standard 30°.
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Why: The flatter angle prevents the cutter from "digging in" too aggressively. It creates a planing action rather than a slicing action.
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The Result: The saw glides through the cut smoother, vibration is reduced, and the resulting slab surface is much cleaner (requiring less sanding later).
2. The Cutter Sequence (Granberg Style)
Some advanced ripping chains (like "Granberg" style) feature a special sequence where scoring cutters and clearing cutters are arranged in pairs.
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Alpine Standard Ripping: We focus on the 10° Full House configuration. This is a standard chain chassis filed to 10°. It offers the best balance of cut speed and finish quality for Australian hardwoods.
The Big Question: Can I Make My Own?
Technically, yes. You can take a standard 30° chain and file it down to 10°.
But be warned:
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Time: It takes a lot of filing to reshape a 30° cutter to 10°. You will likely waste 30% of the tooth just changing the angle.
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Accuracy: Getting every tooth to exactly 10° by hand is difficult without a precision jig. Uneven angles will leave "washboard" marks on your slab.
The Alpine Recommendation: Save your file and your time. Buy a factory-ground Alpine Ripping Chain. It comes out of the box at the perfect 10° angle, ready to mill.
[Shop Ripping Chains Here]