Industry Technical Specifications & Standards
Technical Reference for Professional Buyers
Pitch
Pitch is the distance between any three consecutive drive link rivets divided by two (i.e., center-to-center spacing of drive links). Chain and bar pitch must match exactly.
3/8" LP (Low Profile) and 3/8" are mechanically distinct:
- •3/8" LP: 0.365" (9.27mm). Low-kickback consumer saws. Reduced cutter depth.
- •3/8": 0.375" (9.525mm). Mid-to-large professional saws. Higher chip clearance.
Critical: LP and standard 3/8" are NOT interchangeable.
Common pitch summary
| Pitch | Spacing (approx.) | Typical use |
|---|---|---|
| 1/4" P | 0.250" (6.35mm) | Mini / pole saws |
| .325" | 0.325" (8.26mm) | Mid-size pro / prosumer |
| 3/8" LP | 0.365" (9.27mm) | Consumer, low-kickback |
| 3/8" | 0.375" (9.525mm) | Professional, large saws |
| .404" | 0.404" (10.26mm) | Harvester / heavy-duty |
Chains of different pitch cannot be used on the same bar.
Gauge
Gauge is the drive link thickness that fits into the guide bar groove. Measure with a caliper or chain gauge tool. Precision fit is critical for safe operation; mismatch causes derailment and bar wear.
| Imperial | Metric | Application |
|---|---|---|
| .043" | 1.1mm | Battery saws, narrow kerf |
| .050" | 1.3mm | Consumer saws, general purpose |
| .058" | 1.5mm | Mid-range professional |
| .063" | 1.6mm | Heavy-duty professional |
Note: Gauge tolerance is ±0.001". Mismatched gauge causes chain derailment and bar damage.
Drive Link (Standard vs. Anti-Kickback)
Drive link type affects kickback behavior and where the chain can be used. Match the chain to your saw and application.
- •Standard: Full-depth cutters, maximum cutting speed. Typical for professional saws and experienced users.
- •Anti-Kickback (low-kickback): Bumper links or depth limiters between cutters reduce kickback. Often required for consumer saws (ANSI B175.1). Lower cutting speed, higher safety.
Note: Use only chains specified for your saw. Mixing standard and anti-kickback on the wrong bar can affect safety and performance.
Cutter Geometry
Full-chisel and semi-chisel are the two main cutter profiles in common use. Chipper and other specialty profiles exist for specific applications; the guide below covers the majority of chains.
Full-Chisel (Square-Corner)
- •Razor-sharp square corners
- •Highest chip clearance speed
- •Optimal for: Western softwoods (pine, fir, cedar)
- •Requires frequent sharpening in dirty conditions
Semi-Chisel (Rounded-Corner)
- •Rounded cutting corners
- •Superior edge retention
- •Optimal for: Eastern hardwoods (oak, maple, hickory), frozen wood, dirty conditions
- •Less prone to dulling, extended sharpening intervals
See Regional Application Guide for Series W, P, E recommendations by North American region.
This reference aligns with ANSI B175.1 and common industry chain specifications. Definitions and tolerances are as of current standards; verify with OEM or latest standards when specifying. For fitment by saw/bar, use Fitment Finder; return to Tools for calculators and cross-reference.